UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
 
FORM 10-Q
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2023

March 31, 2024
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number 001-36103

Clean Energy Solutions.jpg
TECOGEN INC. (OTCQX:TGEN)
(Exact name of Registrant as specified in its charter)
Delaware04-3536131
(State or Other Jurisdiction of Incorporation or Organization)(IRS Employer Identification No.)
45 First Avenue76 Treble Cove Road
Waltham,North Billerica, Massachusetts 0245101862
(Address of Principal Executive Offices and Zip Code)
45 First Avenue
Waltham, MA 02451
(Former Address of Principal Executive Offices and Zip Code)
(781) 466-6402
(Registrant's telephone number, including area code)
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý No ¨
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ý No ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer”, “accelerated filer”, “smaller reporting company”, and "emerging growth company" in Rule 12b-2 of the Exchange Act:Act.
Large accelerated filero
Accelerated filer o
Non-accelerated filer
Emerging Growth company     
Smaller reporting company
Accelerated filer         o
Non–Accelerated Filer     Smaller reporting company     
Emerging growth company     

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes.Yes No ý

As of November 8, 2023,March 31, 2024, 24,850,261 shares of common stock, $.001 par value per share, of the registrant were issued and outstanding.



TECOGEN INC.




QUARTERLY REPORT ON FORM 10-Q
FOR THE PERIOD ENDED SEPTEMBER 30, 2023MARCH 31, 2024
TABLE OF CONTENTS
 
PART I - FINANCIAL INFORMATION

References in this Form 10-Q to "we", "us", "our"', the "Company" and "Tecogen" refers to Tecogen Inc. and its consolidated subsidiaries, unless otherwise noted.


TECOGEN INC.




PART I - FINANCIAL INFORMATION
Item 1 - Financial Statements

CONDENSED CONSOLIDATED BALANCE SHEETS
(unaudited)
September 30, 2023December 31, 2022 March 31, 2024December 31, 2023
ASSETSASSETS
Current assets:Current assets:  
Current assets:
Current assets:
Cash and cash equivalentsCash and cash equivalents$646,161 $1,913,969 
Cash and cash equivalents
Cash and cash equivalents
Accounts receivable, netAccounts receivable, net7,694,571 6,714,122 
Accounts receivable, net
Accounts receivable, net
Inventories, net
Inventories, net
Inventories, net
Unbilled revenueUnbilled revenue1,748,336 1,805,330 
Employee retention credit receivable46,148 713,269 
Inventories, net11,039,313 10,482,729 
Prepaid and other current assets
Prepaid and other current assets
Prepaid and other current assetsPrepaid and other current assets420,317 401,189 
Total current assetsTotal current assets21,594,846 22,030,608 
Long-term assets:Long-term assets:
Property, plant and equipment, net
Property, plant and equipment, net
Property, plant and equipment, netProperty, plant and equipment, net1,254,656 1,407,720 
Right of use assetsRight of use assets754,957 1,245,549 
Intangible assets, netIntangible assets, net2,307,902 997,594 
GoodwillGoodwill3,129,147 2,406,156 
Goodwill
Goodwill
Other assets
Other assets
Other assetsOther assets145,237 165,230 
TOTAL ASSETSTOTAL ASSETS$29,186,745 $28,252,857 
LIABILITIES AND STOCKHOLDERS’ EQUITYLIABILITIES AND STOCKHOLDERS’ EQUITY  
LIABILITIES AND STOCKHOLDERS’ EQUITY
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:Current liabilities:  
Current liabilities:
Current liabilities:
Related party notes
Related party notes
Related party notes
Accounts payable
Accounts payable
Accounts payableAccounts payable$4,493,758 $3,261,952 
Accrued expensesAccrued expenses2,632,607 2,384,447 
Deferred revenue, currentDeferred revenue, current1,655,737 1,115,627 
Lease obligations, currentLease obligations, current367,938 687,589 
Acquisition liabilities, current
Acquisition liabilities, current
Acquisition liabilities, currentAcquisition liabilities, current775,991 — 
Unfavorable contract liability, currentUnfavorable contract liability, current201,090 236,705 
Total current liabilitiesTotal current liabilities10,127,121 7,686,320 
Long-term liabilities:Long-term liabilities:  
Long-term liabilities:
Long-term liabilities:
Deferred revenue, net of current portion
Deferred revenue, net of current portion
Deferred revenue, net of current portionDeferred revenue, net of current portion290,226 371,823 
Lease obligations, net of current portionLease obligations, net of current portion429,737 623,452 
Acquisition liabilities, net of current portionAcquisition liabilities, net of current portion1,485,677 — 
Unfavorable contract liability, net of current portionUnfavorable contract liability, net of current portion448,695 583,512 
Total liabilitiesTotal liabilities12,781,456 9,265,107 
Commitments and contingencies (Note 12)
Commitments and contingencies
Commitments and contingencies
Commitments and contingencies
Stockholders’ equity:Stockholders’ equity:  
Tecogen Inc. stockholders’ equity:  
Common stock, $0.001 par value; 100,000,000 shares authorized; 24,850,261 issued and outstanding at September 30, 2023 and December 31, 202224,850 24,850 
Stockholders’ equity:
Stockholders’ equity:
Tecogen Inc. shareholders’ equity:
Tecogen Inc. shareholders’ equity:
Tecogen Inc. shareholders’ equity:
Common stock, $0.001 par value; 100,000,000 shares authorized; 24,850,261 issued and outstanding at March 31, 2024 and December 31, 2023
Common stock, $0.001 par value; 100,000,000 shares authorized; 24,850,261 issued and outstanding at March 31, 2024 and December 31, 2023
Common stock, $0.001 par value; 100,000,000 shares authorized; 24,850,261 issued and outstanding at March 31, 2024 and December 31, 2023
Additional paid-in capitalAdditional paid-in capital57,525,719 57,351,008 
Accumulated deficit
Accumulated deficit
Accumulated deficitAccumulated deficit(41,033,259)(38,281,548)
Total Tecogen Inc. stockholders’ equityTotal Tecogen Inc. stockholders’ equity16,517,310 19,094,310 
Non-controlling interestNon-controlling interest(112,021)(106,560)
Total stockholders’ equityTotal stockholders’ equity16,405,289 18,987,750 
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITYTOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY$29,186,745 $28,252,857 
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY

 The accompanying notes are an integral part of these condensed consolidated financial statements. 
1

TECOGEN INC.




CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(unaudited)
Three Months Ended
Three Months Ended
Three Months Ended
Three Months Ended
September 30, 2023September 30, 2022
RevenuesRevenues
Revenues
Revenues
Products
Products
ProductsProducts$2,938,789 $3,206,732 
ServicesServices3,842,600 3,078,604 
Services
Services
Energy production
Energy production
Energy productionEnergy production331,141 332,774 
Total revenuesTotal revenues7,112,530 6,618,110 
Total revenues
Total revenues
Cost of sales
Cost of sales
Cost of salesCost of sales
ProductsProducts1,669,747 2,074,243 
Products
Products
Services
Services
ServicesServices2,346,384 1,482,355 
Energy productionEnergy production170,378 168,178 
Energy production
Energy production
Total cost of sales
Total cost of sales
Total cost of salesTotal cost of sales4,186,509 3,724,776 
Gross profitGross profit2,926,021 2,893,334 
Operating expenses
Gross profit
Gross profit
Operating expenses:
Operating expenses:
Operating expenses:
General and administrative
General and administrative
General and administrativeGeneral and administrative2,708,817 2,343,449 
SellingSelling425,465 567,529 
Selling
Selling
Research and developmentResearch and development160,033 202,138 
Research and development
Research and development
Gain on disposition of assets
Gain on disposition of assets
Gain on disposition of assetsGain on disposition of assets— (5,486)
Total operating expensesTotal operating expenses3,294,315 3,107,630 
Total operating expenses
Total operating expenses
Loss from operations
Loss from operations
Loss from operationsLoss from operations(368,294)(214,296)
Other income (expense)Other income (expense)
Interest income and other income (expense), net(16,330)(7,140)
Other income (expense)
Other income (expense)
Other income (expense), net
Other income (expense), net
Other income (expense), net
Interest expense
Interest expense
Interest expenseInterest expense(6,357)(2,280)
Unrealized loss on investment securities(56,246)— 
Unrealized gain on investment securities
Unrealized gain on investment securities
Unrealized gain on investment securities
Total other income (expense), net
Total other income (expense), net
Total other income (expense), netTotal other income (expense), net(78,933)(9,420)
Loss before provision for state income taxesLoss before provision for state income taxes(447,227)(223,716)
Loss before provision for state income taxes
Loss before provision for state income taxes
Provision for state income taxes
Provision for state income taxes
Provision for state income taxesProvision for state income taxes— 5,922 
Consolidated net lossConsolidated net loss(447,227)(229,638)
Consolidated net loss
Consolidated net loss
Income attributable to the non-controlling interestIncome attributable to the non-controlling interest(34,346)(27,074)
Net loss attributable to Tecogen Inc.$(481,573)$(256,712)
Income attributable to the non-controlling interest
Income attributable to the non-controlling interest
Loss attributable to Tecogen Inc.
Loss attributable to Tecogen Inc.
Loss attributable to Tecogen Inc.
Net loss per share - basicNet loss per share - basic$(0.02)$(0.01)
Net loss per share - basic
Net loss per share - basic
Weighted average shares outstanding - basic
Weighted average shares outstanding - basic
Weighted average shares outstanding - basic
Net loss per share - dilutedNet loss per share - diluted$(0.02)$(0.01)
Weighted average shares outstanding - basic24,850,261 24,850,261 
Net loss per share - diluted
Net loss per share - diluted
Weighted average shares outstanding - dilutedWeighted average shares outstanding - diluted24,850,261 24,850,261 
Weighted average shares outstanding - diluted
Weighted average shares outstanding - diluted
 

The accompanying notes are an integral part of these condensed consolidated financial statements.

2

TECOGEN INC.




CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONSSTOCKHOLDERS' EQUITY
For the Three Months Ended March 31, 2024 and 2023
(unaudited)
Nine Months Ended
 September 30, 2023September 30, 2022
Revenues
Products$7,094,556 $10,156,328 
Services10,931,744 9,046,075 
     Energy production1,214,806 1,268,623 
Total revenues19,241,106 20,471,026 
Cost of sales
Products4,500,771 6,734,465 
Services6,159,855 4,322,693 
     Energy production728,124 726,297 
Total cost of sales11,388,750 11,783,455 
Gross profit7,852,356 8,687,571 
Operating expenses
General and administrative8,418,581 7,642,183 
Selling1,426,321 1,572,221 
Research and development625,691 537,126 
Gain on disposition of assets(19,950)(41,931)
Gain on termination of unfavorable contract liability— (71,375)
Total operating expenses10,450,643 9,638,224 
Loss from operations(2,598,287)(950,653)
Other income (expense)
Interest income and other income (expense), net(36,562)(22,556)
Interest expense(8,629)(15,841)
Unrealized gain (loss) on investment securities(18,749)37,497 
Total other income (expense), net(63,940)(900)
Loss before provision for state income taxes(2,662,227)(951,553)
Provision for state income taxes32,252 16,352 
Consolidated net loss(2,694,479)(967,905)
Income attributable to non-controlling interest(57,232)(55,616)
Net loss attributable to Tecogen Inc.$(2,751,711)$(1,023,521)
Net loss per share - basic$(0.11)$(0.04)
Net loss per share - diluted$(0.11)$(0.04)
Weighted average shares outstanding - basic24,850,261 24,850,261 
Weighted average shares outstanding - diluted24,850,261 24,850,261 



Tecogen Inc. Stockholders
Three Months ended March 31, 2024Common Stock SharesCommon
Stock
0.001
Par Value
Additional
Paid-In
Capital
Accumulated
Deficit
Non-controlling
Interest
Total
Balance at December 31, 202324,850,261 $24,850 $57,601,402 $(42,879,656)$(94,301)14,652,295 
Stock-based compensation expense— — 44,535 — — 44,535 
Net income (loss)— — — (1,104,967)17,351 (1,087,616)
Balance at March 31, 202424,850,261 $24,850 $57,645,937 $(43,984,623)$(76,950)$13,609,214 
Three Months ended March 31, 2023Common Stock SharesCommon
Stock
0.001
Par Value
Additional
Paid-In
Capital
Accumulated
Deficit
Non-controlling
Interest
Total
Balance at December 31, 202224,850,261 $24,850 $57,351,008 $(38,281,548)$(106,560)$18,987,750 
Stock-based compensation expense— — 77,348 — — 77,348 
Net income (loss)— — — (1,490,029)18,060 (1,471,969)
Balance at March 31, 202324,850,261 $24,850 $57,428,356 $(39,771,577)$(88,500)$17,593,129 

The accompanying notes are an integral part of these condensed consolidated financial statements.












3

TECOGEN INC.




CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Three and Nine Months September 30, 2023 and 2022
(unaudited)



Three Months Ended September 30, 2023Common Stock SharesCommon
Stock
0.001
Par Value
Additional
Paid-In
Capital
Accumulated
Deficit
Non-controlling
Interest
Total
Balance at June 30, 202324,850,261 $24,850 $57,456,944 $(40,551,686)$(107,512)$16,822,596 
Stock-based compensation expense— — 68,775 — — 68,775 
Distributions to non-controlling interest— — — — (38,855)(38,855)
Net income (loss)— — — (481,573)34,346 (447,227)
Balance at September 30, 202324,850,261 $24,850 $57,525,719 $(41,033,259)$(112,021)$16,405,289 
Nine Months Ended September 30, 2023Common Stock SharesCommon
Stock
0.001
Par Value
Additional
Paid-In
Capital
Accumulated
Deficit
Non-controlling
Interest
Total
Balance at December 31, 202224,850,261 $24,850 $57,351,008 $(38,281,548)$(106,560)$18,987,750 
Stock-based compensation expense— — 174,711 — — 174,711 
Distributions to non-controlling interest— — — — (62,693)(62,693)
Net income (loss)— — — (2,751,711)57,232 (2,694,479)
Balance at September 30, 202324,850,261 $24,850 $57,525,719 $(41,033,259)$(112,021)$16,405,289 
Three Months Ended September 30, 2022Common Stock SharesCommon
Stock
0.001
Par Value
Additional
Paid-In
Capital
Accumulated
Deficit
Non-controlling
Interest
Total
Balance at June 30, 202224,850,261 $24,850 $57,202,459 $(36,600,430)$(84,206)20,542,673 
Stock-based compensation expense— — 69,118 — — 69,118 
Distributions to non-controlling interest— — — — (24,014)(24,014)
Net income (loss)— — — (256,712)27,074 (229,638)
Balance at September 30, 202224,850,261 $24,850 $57,271,577 $(36,857,142)$(81,146)$20,358,139 
Nine Months Ended September 30, 2022Common Stock SharesCommon
Stock
0.001
Par Value
Additional
Paid-In
Capital
Accumulated
Deficit
Non-controlling
Interest
Total
Balance at December 31, 202124,850,261 $24,850 $57,016,859 $(35,833,621)$(79,939)$21,128,149 
Stock-based compensation expense— — 254,718 — — 254,718 
Distributions to non-controlling interest— — — — (56,823)(56,823)
Net income (loss)— — — (1,023,521)55,616 (967,905)
Balance at September 30, 202224,850,261 $24,850 $57,271,577 $(36,857,142)$(81,146)$20,358,139 

The accompanying notes are an integral part of these condensed consolidated financial statements.
43

TECOGEN INC.




CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited)
Nine Months Ended
 September 30, 2023September 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated net loss$(2,694,479)$(967,905)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization, net459,779 324,968 
Stock-based compensation174,711 254,718 
Provision (release) for doubtful accounts44,000 (183,955)
Gain on disposition of assets(19,950)(41,931)
Unrealized (gain) loss on investment securities18,749 (37,497)
Gain on termination of unfavorable contract liability— (71,375)
Changes in operating assets and liabilities
(Increase) decrease in:
Accounts receivable(1,324,448)67,940 
Employee retention credit receivable667,121 562,752 
Unbilled revenue56,994 1,302,187 
Inventories(165,537)(947,031)
Prepaid expenses and other current assets(19,128)70,806 
Other assets491,836 466,420 
Increase (decrease) in:
Accounts payable1,140,759 (182,903)
Accrued expenses and other current liabilities256,847 (80,720)
Deferred revenue458,512 (487,676)
Other liabilities(566,016)(482,608)
Net cash used in operating activities(1,020,250)(433,810)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment(31,728)(286,820)
Payment for business acquisition(170,000)— 
Purchases of intangible assets— (29,505)
Proceeds from disposition of assets16,863 72,655 
Distributions to non-controlling interest(62,693)(56,823)
Net cash used in investing activities(247,558)(300,493)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net cash provided by financing activities— — 
Change in cash and cash equivalents(1,267,808)(734,303)
Cash and cash equivalents, beginning of the period1,913,969 3,614,463 
Cash and cash equivalents, end of the period$646,161 $2,880,160 
Supplemental disclosures of cash flows information:  
Cash paid for interest$7,385 $14,597 
Cash paid for taxes$32,252 $16,352 
Non-cash consideration issued for Aegis acquisition:
  Accounts receivable credit$300,000 $— 
  Accounts payable assumed91,048 — 
  Contingent consideration1,442,462 — 
Total fair value of non-cash consideration$1,833,510 $— 

Three Months Ended
 March 31, 2024March 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated net loss$(1,087,616)(1,471,969)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization140,137 105,920 
Provision for credit losses14,258 — 
Stock-based compensation44,535 77,348 
Unrealized gain on investment securities(18,749)— 
Gain on disposition of assets(7,391)— 
Non-cash interest expense6,400 — 
Changes in operating assets and liabilities
(Increase) decrease in:
Accounts receivable234,095 (44,238)
Employee retention credit— 667,121 
Inventory532,418 (1,380,052)
Unbilled revenue— 16,428 
Prepaid assets and other current assets(48,933)136,170 
Other assets194,283 161,931 
Increase (decrease) in:
Accounts payable(500,516)905,509 
Accrued expenses and other current liabilities167,789 (143,923)
Deferred revenue791,181 852,600 
Other liabilities(213,675)(167,711)
Net cash provided by (used in) operating activities248,216 (284,866)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment(104,952)— 
Proceeds from disposition of assets33,013 — 
Net cash used in investing activities(71,939)— 
CASH FLOWS FROM FINANCING ACTIVITIES:
     Finance lease principal payments(17,112)— 
Net cash used in financing activities(17,112)— 
Net increase (decrease) in cash and cash equivalents159,165 (284,866)
Cash and cash equivalents, beginning of the period1,351,270 1,913,969 
Cash and cash equivalents, end of the period$1,510,435 $1,629,103 
Supplemental disclosure of cash flow information:
Cash paid for interest$11,855 $— 
Cash paid for taxes$425 $22,638 
Non-cash investing activities
Aegis Contract and Related Asset Acquisition:
Contingent consideration$92,409 $— 

The accompanying notes are an integral part of these condensed consolidated financial statements. 
54

TECOGEN INC.
Notes to Condensed Consolidated Financial Statements


Note 1. Description of Business and Basis of Presentation
Description of Business
Tecogen Inc. (together with its subsidiaries “we,” “our,”"we", "our", "us" or “us,” or “Tecogen”"Tecogen") designs, manufactures, markets,, a Delaware Corporation, was incorporated on September 15, 2000, and maintains high efficiency, ultra-clean cogeneration products. These include natural gas engine drivenacquired the assets and liabilities of the Tecogen Products division of Thermo Power Corporation. We produce commercial and industrial, natural-gas-fueled engine-driven, combined heat and power (CHP) systems, chillers and heat pumps for multi-family residential, commercial, recreational and industrial use.We are known for products that provide customers with substantialreduce energy savings, resiliency from utilitycosts, decrease greenhouse gas emissions and alleviate congestion on the national power outages and for significantly reducing a customer’s carbon footprint.grid. Our products are sold with our patented Ultera® emissions technology which nearly eliminates all criteria pollutants such as nitrogen oxide ("NOx")supply electric power or mechanical power for cooling, while heat from the engine is recovered and carbon monoxide ("CO"). We developed Ultera® for other applications including stationary engines and forklifts. We were incorporated in the State of Delaware on September 15, 2000.
We have wholly-owned subsidiaries American DG Energy, Inc. ("ADGE") and Tecogen CHP Solutions, Inc., and we ownpurposefully used at a 51% interest in American DG New York, LLC ("ADGNY"), a joint venture. ADGE and ADGNY distribute, own, and operate clean, on-site energy systems that produce electricity, hot water, heat and cooling. ADGE and ADGNY own the equipment that is installed at customers' facilities and sell the energy produced to the customer on a long-term contractual basis.
Our operations are comprised of three business segments:
our Products segment, which designs, manufactures and sells industrial and commercial cogeneration systems;
our Services segment, which provides operations and maintenance ("O&M") services for our products under long term service contracts, and
our Energy Production segment, which installs, operates and maintains distributed generation electricity systems that we own and sells energy generated by such systems in the form of electricity, heat, hot water and cooling to our customers under long-term energy sales agreements.
facility. The majority of our customers are located in regions with the highest utility rates, typically California, the Midwest and the Northeast.
On July 20, 2022,Our operations are comprised of three business segments. Our Products segment designs, manufactures and sells industrial and commercial cogeneration systems. Our Services segment provides operation and maintenance services to customers for our products. Our Energy Production segment sells energy in the form of electricity, heat, hot water and cooling to our customers under long-term sales agreements.

Liquidity, Going Concern and Management's Plans
The consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting
principles assuming that we announcedwill continue as a going concern, which contemplates the realization of assets and the settlement of obligations in the normal course of business. As of March 31, 2024, our intentioncash and cash equivalents were $1,510,435, compared to $1,351,270 at December 31, 2023, an increase focus on opportunities relatingof $159,165. For the three months ended March 31, 2024 we generated $248,216 in cash from operations and a net operating loss of $1,049,885, due to Controlled Environment Agriculture (CEA). Tecogen believes that CEA offersa decrease in Products revenue and gross margin, a decrease in Services gross margin percentage due to higher labor and material costs and an exciting opportunityincrease in operating expenses. Working capital at March 31, 2024 was $8,499,647, compared to apply the company’s expertise in clean cooling, power generation,$9,822,546 at December 31, 2023, a decrease of $1,322,899 and greenhouse gas reduction to address critical issues affecting food and energy security. However, we have not taken any formal steps to enter this business asour accumulated deficit was $43,984,623.

As a result of the dateabove factors, management has performed an analysis to evaluate the entity’s ability to continue as a going concern for one year after the financial statements issuance date. Management’s analysis includes forecasting future revenues, expenditures and cash flows, taking into consideration past performance as well as key initiatives recently undertaken. Our forecasts are dependent on our ability to maintain margins based on the Company's ability to close on new and expanded business, leverage existing working capital, and effectively manage expenses. New and expanded business includes the sale and shipment of newly developed hybrid-drive air-cooled chillers and the filingacquisition of this report.additional maintenance contracts in February 2024. Our backlog at March 31, 2024 was $5,554,599. We may also be required to borrow funds under note subscription agreements with related parties (see Note 11. "Related Party Notes").Based on management's analysis, we believe that cash flows from operations and the note agreements will be sufficient to fund operations over the next twelve months. There can, however, be no assurance we will be able to do so. Based on our analysis, the consolidated financial statements do not include any adjustments to the carrying amounts and classification of assets, liabilities, and reported expenses that may be necessary if we were unable to continue as a going concern.
Our common stock is quoted on OTC Markets Group, Inc.'s OTCQX Best Market tier and trades under the symbol "TGEN."
On May 18, 2017, we acquired 100% of the outstanding common stock of American DG Energy Inc., formerly a related entity, in a stock-for-stock merger.
On March 15, 2023, we entered into an agreement ("Agreement") with Aegis Energy Services, LLC (“Aegis”) pursuant to which Aegis agreed to assign to us and we agreed to assume certain Aegis maintenance agreements, we agreed to purchase certain assets, and related matters (“Acquisition”). On April 1, 2023, the Acquisition closed. Under the Agreement, we agreed to acquire from Aegis and assume Aegis rights and obligations arising on or after April 1, 2023, under maintenance agreements pursuant to which Aegis provided maintenance services for approximately 200 cogeneration systems, and acquired certain vehicles and inventory used by Aegis in connection with the performance of such maintenance services, and, following closing hired eight (8) Aegis employees to provide services with respect to such maintenance agreements. At closing, we acquired eight (8) Aegis vehicles for consideration consisting of $170,000 in cash. Also, we issued credits against outstanding accounts receivable due from Aegis in the amount of $300,000 for the acquisition of inventory that Aegis used to provide maintenance services. See Note 8. - Aegis Contract and Related Asset Acquisition.
Basis of Presentation
    The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting standards set by the Financial Accounting Standards Board, or FASB. The FASB sets generally accepted accounting principles, or GAAP, to ensure financial condition, results of operations, and cash flows are consistently reported. References to GAAP issued by the FASB in these footnotes are to the FASB Accounting Standards Codification, or ASC. We adopted the presentation requirements for interimnoncontrolling interests required by ASC 810 Consolidation. Under ASC 810, earnings or losses attributed to the noncontrolling interests are reported as part of the consolidated earnings and not a separate component of income or expense.
The accompanying consolidated financial informationstatements include our accounts and the accounts of the entities in which we have a controlling financial interest. Those entities include our wholly-owned subsidiary, American DG Energy Inc. ("ADGE"), Tecogen CHP Solutions, Inc., and a joint venture, American DG New York, LLC, or ADGNY, in which ADGE holds a 51.0% interest. As the controlling partner, all major decisions in respect of ADGNY are made by ADGE in accordance with the instructionsjoint venture agreement. The interests in the individual underlying energy system projects in ADGNY vary between ADGE and its joint venture partner. The noncontrolling interest and distributions are determined based on economic ownership. The economic ownership is calculated by the amount invested by us and the noncontrolling partner in each site. Each quarter, we calculate a year-to-date profit/loss for each site that is part of ADGNY and the noncontrolling interest percent of economic ownership in
5

TECOGEN INC.
Notes to Form 10-QCondensed Consolidated Financial Statements

each site is applied to determine the noncontrolling interest share in the profit/loss. The same methodology is used to determine quarterly distributions of available cash to the noncontrolling interest partner. On our balance sheet, noncontrolling interest represents the joint venture partner’s investment in ADGNY, plus its share of after-tax profits less any cash distributions. ADGE owned a controlling 51.0% legal and Article 8economic interest in ADGNY as of Regulation S-X. Accordingly, they do not include all the informationMarch 31, 2024 and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation have been included.December 31, 2023. Operating results for the ninethree months ended September 30, 2023March 31, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023.2024. All intercompany transactions have been eliminated in consolidation.
    The condensed consolidated balance sheet at December 31, 20222023 has been derived from the audited consolidated financial statements at that date included in our annual report of Form 10-K for the year ended December 31, 2022 ("2022 Form
6

TECOGEN INC.
Notes to Condensed Consolidated Financial Statements

10-K"), but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.
For further information, refer to the consolidated financial statements and footnotes thereto included in Tecogen's Annual Report on Form 10-K for the year ended December 31, 2022.
    The accompanying unaudited condensed consolidated financial statements include our accounts and the accounts of entities in which we have a controlling financial interest. Those entities include our wholly-owned subsidiaries American DG Energy Inc., Tecogen CHP Solutions, Inc., and a joint venture, American DG New York, LLC, in which American DG Energy Inc. holds a 51% interest. Investments in partnerships and companies in which we do not have a controlling financial interest but where we have significant influence are accounted for under the equity method. Any intercompany transactions have been eliminated in consolidation.
    Our operations are comprised of three business segments. Our Products segment designs, manufactures and sells industrial and commercial cogeneration systems as described above. Our Services segment provides operation and maintenance services to customers for our products. Our Energy Production segment installs, operates and maintains distributed generation electricity systems that we own and sells energy generated by such systems in the form of electricity, heat, hot water and cooling to our customers under long-term sales agreements.2023.
Use of Estimates
The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Liquidity
At September 30, 2023, we had cash and cash equivalents of $646,161, a decrease of $1,267,808 or 66.2% from the cash and cash equivalents balance at December 31, 2022. During the nine months ended September 30, 2023, our Products revenue was negatively impacted. Our Products have long sales cycles and the reduced business development activity in the aftermath of COVID-19 resulted in what we believe is a temporary reduction in Products revenue.
    Based on our current operating plan, we believe existing resources, including existing cash, cash flows from operations and the funds available to us under loans from certain related parties will be sufficient to meet our working capital requirements for the next twelve months. However, we may need to generate sufficient additional cash from operations to finance the company during the periods beyond twelve months.
On October 9, 2023, we entered into an agreement with each of John N. Hatsopoulos, a director and principal shareholder of registrant, and Earl R. Lewis, III, a director, pursuant to which Mr. Hatsopoulos agreed to provide financing to us of up to $1 million, and Mr. Lewis agreed to provide financing to us of $500,000, and potentially an additional $500,000 at his discretion. On October 10, 2023, we issued a promissory note and borrowed $500,000 from Mr. Hatsopoulos. The loan bears interest at 5.12% per annum and is repayable one year from the date of the issuance of the related promissory note. The proceeds of the loans are expected to be used for general working capital purposes.
If sufficient funds from operating activities are not available to finance our business and operations, we may need to raise additional capital through debt financing or an equity offering to meet our operating and capital needs. There can be no assurance we will be able to raise such additional debt or equity financing or upon terms that are acceptable to us.
Income Taxes
    The provisions for income taxes in the accompanying unaudited consolidated statements of operations differ from that which would be expected by applying the federal statutory tax rate primarily due to losses for which no benefit is recognized.
Employee Retention CreditBusiness Combinations
    On March 27, 2020,In accordance with applicable accounting standards, we estimate the Coronavirus Aid, Relief,fair value of assets acquired and Economic Security Act (“CARES Act”) was signed into law providing numerous tax provisionsliabilities assumed as of the acquisition date of each business combination. Any excess purchase price over the fair value of the net tangible and intangible assets acquired is allocated to goodwill. We may make certain estimates and assumptions when determining the fair values of assets acquired and liabilities assumed, including intangible assets. Critical estimates in valuing certain intangible assets include but are not limited to future expected cash flows from energy production sites or customer maintenance contracts, estimated operating costs, as well as discount rates. At the acquisition date, we will also record acquisition related liabilities, if applicable, for any contingent consideration or deferred payments to the seller. Contingent consideration is recorded at fair value on the acquisition date based on our expectation of achieving the contractually defined revenue targets. The fair value of the contingent consideration liabilities is remeasured each reporting period after the acquisition date and any changes in the estimated fair value are reflected as gains or losses in general and administrative expense in the consolidated statement of operations. Contingent consideration liabilities and deferred payments to sellers are recorded as current liabilities and other stimulus measures, including an employee retention credit (“ERC”),long-term liabilities in the consolidated balance sheets based on the expected timing of settlement.
Management’s estimates of fair value are based upon assumptions believed to be reasonable, but which is a refundable tax credit against certain employment taxes. The Taxpayer Certaintyare inherently uncertain and Disaster Tax Relief Act of 2020unpredictable and, the American Rescue Plan Act of 2021 extended and expanded the availability of the ERC.
Asas a result, of our electionactual results may differ from estimates. Any changes to use an alternative quarter, we qualified forprovisional amounts identified during the ERCmeasurement period are recognized in the first, secondreporting period in which the adjustment amounts are determined. Transaction costs associated with business combinations are expensed as incurred.
Segment Information
Our operations are comprised of three business segments. Our Products segment designs, manufactures and third quarters of 2021 becausesells industrial and commercial cogeneration systems. Our Services segment installs and maintains our gross receipts decreased by more than 20% from the first, second and third quarters of 2019. As a result of averaging 100 or fewer full-time employees in 2019, all wages paid to employeescogeneration systems. Our Energy Production segment sells energy in the first, secondform of electricity, heat, hot water and third quarters of 2021, excludingcooling to our customers under long-term sales agreements.

Recently Issued Accounting Standards
Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures. In November 2023, the wages appliedFinancial Accounting Standards Board issued ASU 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures. The new standard requires enhanced disclosures about a public entity's reportable segments including more detailed information about a reportable segment's expenses. The amendments in this update apply to all public entities that are required to report segment information, and include those entities that have a single reportable segment. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. We are currently evaluating the Paycheck Protection Program Second Draw Loan, were eligible for the ERC.impact on our consolidated financial statements and related disclosures.
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TECOGEN INC.
Notes to Condensed Consolidated Financial Statements

During
Income Taxes (Topic 740) - Improvements to Income Tax Disclosures. In December 2023, the three months ended June 30, 2021, we recorded an ERC benefitFinancial Accounting Standards Board issued ASU 2023-09, Income Taxes (Topic 740) - Improvements to Income Tax Disclosures. ASU 2023-09 provides more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. The amendments in this update are effective for annual periods beginning after December 15, 2024. Early adoption is permitted. We are currently evaluating the firstimpact on our consolidated financial statements and second quarters of 2021 of $713,269 and, in the three months ended September 30, 2021 we recorded an ERC benefit for the third quarter of 2021 of $562,752, respectively, in other income (expense), net in the our condensed consolidated statements of operations. On April 14, 2022, we received $564,027 from the Internal Revenue Service representing the ERC claim for the third quarter of 2021 and $1,275 of accrued interest. We received $667,121 from the Internal Revenue Service on January 12, 2023 representing a partial payment of the ERC claimed from the first and second quarters of 2021 and $15,775 of accrued interest, which is reported in other income (expense) in our condensed consolidated statements of operations for the nine months ended September 30, 2023. A current receivable in the amount of $46,148 is included in our condensed consolidated balance sheet as of September 30, 2023.related disclosures.
Note 2. Revenue
Revenue is recognized when performance obligations under the terms of a contract with our customer are satisfied; generally this occurs with the transfer of control of our products, services and energy production. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services or energy to customers.
Shipping and handling fees billed to customers in a sales transaction are recorded in revenue and shipping and handling costs incurred are recorded in cost of sales. We have elected to exclude from revenue any value-added sales and other taxes which we collect concurrent with revenue-producing activities. These accounting policy elections are consistent with the manner in which we havehistorically recorded historically shipping and handling fees and value-added taxes. Incremental costs incurred by us to obtain a contract with a customer are negligible, if any, and are expensed ratably in proportion to the related revenue recognized.
Disaggregated Revenue
In general, our business segmentation is aligned according to the nature and economic characteristics of our products and customer relationships and provides meaningful disaggregation of each business segment's results of operations.
The following tablestable further disaggregatedisaggregates our revenue by major source by segment for the three and nine months ended September 30, 2023March 31, 2024 and 2022.
Three Months Ended September 30, 2023
ProductsServicesEnergy ProductionTotal
Products$2,938,789 $— $— $2,938,789 
Maintenance services— 3,842,600 — 3,842,600 
Energy production— — 331,141 331,141 
    Total revenue$2,938,789 $3,842,600 $331,141 $7,112,530 
2023.

Nine Months Ended September 30, 2023
ProductsServicesEnergy ProductionTotal
Products$7,094,556 $— $— $7,094,556 
Maintenance services— 10,931,744 — 10,931,744 
Energy production— — 1,214,806 1,214,806 
    Total revenue$7,094,556 $10,931,744 $1,214,806 $19,241,106 

Three Months Ended September 30, 2022
ProductsServicesEnergy ProductionTotal
Products$3,206,732 $— $— $3,206,732 
Maintenance services— 3,078,604 — 3,078,604 
Energy production— — 332,774 332,774 
    Total revenue$3,206,732 $3,078,604 $332,774 $6,618,110 

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TECOGEN INC.
Notes to Condensed Consolidated Financial Statements

Nine Months Ended September 30, 2022
ProductsServicesEnergy ProductionTotal
Products$10,156,328 $— $— $10,156,328 
Installation services— 20,109 — 20,109 
Maintenance services— 9,025,966 — 9,025,966 
Energy production— — 1,268,623 1,268,623 
    Total revenue$10,156,328 $9,046,075 $1,268,623 $20,471,026 


Three Months Ended
RevenuesMarch 31, 2024March 31, 2023
Products:
Cogeneration$774,229 $543,693 
Chiller657,061 1,068,934 
Engineered Accessories60,108 97,509 
Total Products Revenue1,491,398 1,710,136 
Services4,014,310 3,136,173 
Energy production680,389 533,509 
Total revenues$6,186,097 $5,379,818 
Products Segment

Products. Products.Our Product revenues include cogeneration systems that supply electricity and hot water, chillers that provide air-conditioning and hot water and engineered accessories, which consist of ancillary products and parts necessary to install a cogeneration unit including integration into the customers’ existing electrical and mechanical systems. We refer to the package of engineered accessories and engineering and design services necessary for the customers' installation of a cogeneration unit as light installation services.
We transfer control and generally recognize a sale when we ship a product from our manufacturing facility at which point the customer takes ownership of the product. Payment terms on product sales are generally 30 days.
We recognize revenue in certain circumstances before delivery to the customer has occurred (commonly referred to as bill and hold transactions). We recognize revenue related to such transactions once, among other things, the customer has made a written fixed commitment to purchase the product(s) under normal billing and credit terms, the customer has requested the product(s) be held for future delivery as scheduled and designated by them, risk of ownership has been assumed by the customer, and the product(s) are tagged as sold and segregated for storage awaiting further direction from the customer. Due to the infrequent nature and duration of bill and hold arrangements, the value associated with custodial storage services is deemed immaterial in the context of the contract and in total, and accordingly, none of the transaction price is allocated to such service.
Depending on the product and terms of the arrangement, we may defer the recognition of a portion of the transaction price received because we have to satisfy a future obligation (e.g., product start-up service). Amounts allocated to product start-up services are recognized as revenue when the start-up service has been completed. We use an observable selling price to determine standalone selling prices where available and either a combination of an adjusted market assessment approach, an
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TECOGEN INC.
Notes to Condensed Consolidated Financial Statements

expected cost plus a margin approach, and/or a residual approach to determine the standalone selling prices for separate performance obligations as a basis for allocating contract consideration when an observable selling price is not available. Amounts received but not recognized pending completion of performance are recognized as contract liabilities and are recorded as deferred revenue along with deposits by customers.
Services Segment
Installation Services. Prior to January 1, 2023, we provided installation services which included all necessary engineering and design, labor, subcontract labor and service to install a cogeneration unit including integration into the customers’ existing electrical and mechanical systems. Since January 1, 2023, we have not provided material installation services and do not expect to provide material installation services going forward.
Maintenance Services. Maintenance services are provided under either long-term maintenance contracts or time and material maintenance contracts. Revenue under time and material maintenance contracts is recognized when the maintenance service is completed. Revenue under long-term maintenance contracts is recognized either ratably over the term of the contract where the contract price is fixed or when the periodic maintenance activities are completed and the invoiced cost to the customer is based on run hours or kilowatts produced in a given period. We use an output method to measure progress towards completion of our performance obligation which results in the recognition of revenue on the basis of a direct measurement of the value to the customer of the services transferred to date relative to the remaining services promised under the contract. We use the practical expedient at ASC 606-10-55-18 of recognizing revenue in an amount equal to the amount we have the right to invoice the customer under the contract.
Revenues resulting from the Aegis acquisition (see Note 7. Aegis Contract and Related Asset Acquisitions) have been included in our revenue from the Services segment since April 1, 2023. Payment terms for maintenance services are generally 30 days.
Our acquisition of the Aegis maintenance contracts and related business closed on March 15, 2023 and since April 1, 2023, revenues resulting from the Aegis acquisition have been included in our revenue from the Services segment.
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TECOGEN INC.
Notes to Condensed Consolidated Financial Statements

Energy Production Segment
Energy Production. Revenue from energy contracts is recognized when electricity, heat, hot and/or chilled water is produced by our owned on-site cogeneration systems. Each month we invoicebill the customer and recognize revenue for the various forms of energy delivered, based on actual meter readings which capture the quantity of the various forms of energy delivered in a given month under a contractually defined formula which takes into account the current month's cost of energy from the local power utility.
As the various forms of energy delivered by us under energy production contracts are simultaneously delivered and consumed by the customer, our performance obligation under these contracts is considered to be satisfied over time. We use an output method to measure progress towards completion of our performance obligation which results in the recognition of revenue on the basis of a direct measurement of the value to the customer of the services transferred to date relative to the remaining services promised under the contract. We use the practical expedient at ASC 606-10-55-18 of recognizing revenue in an amount equal to thethat amount thatto which we have the right to invoice the customer under the contract. Payment terms on invoices under these contracts are generally 30 days.
Contract Balances
    The timing of revenue recognition, billings and cash collections result in billed accounts receivable, unbilled revenue (contract assets) and deferred revenue, consisting of customer deposits and billings in excess of revenue recognized (contract liabilities) on the condensed consolidated balance sheets.
    During the nine months ended September 30, 2023, weWe did not recognize any revenue during the three months ended March 31, 2024 that was included in unbilled revenue at the endas of the period. Approximately $16,428 was billed in the nine months ended September 30, 2023 that had been recognized as revenue in previous periods.

March 31, 2024.
    Revenue recognized during the ninethree ended months September 30, 2023March 31, 2024 that was included in deferred revenue at the beginning of the period was approximately $746,111.

$413,107.
Remaining Performance Obligations

Remaining performance obligations related to ASC 606 represent the aggregate transaction price allocated to performance obligations with an original contract term of greater than one year, excluding certain maintenance contracts and all energy production contracts where a direct measurement of the value to the customer is used as a method of measuring progress towards completion of our performance obligation. Exclusion of these remaining performance obligations is due in part to the inability to quantify values based on unknown future levels of delivery and in some cases rates used to invoice customers. Remaining performance obligations therefore consist of unsatisfied or partially satisfied performance obligations related to fixed price maintenance contracts and installation contracts.
As of September 30, 2023,March 31, 2024, the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $1,945,963.$2,807,997. We expect to recognize revenue of approximately 94.0%74.3% of the remaining performance obligations over the next 24 months, 85.1%62.0% recognized in the first 12 months and 8.9%12.3% recognized over the subsequent 12 months and the remainder recognizedbalance thereafter.
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TECOGEN INC.
Notes to Condensed Consolidated Financial Statements


Note 3. Income (Loss) Per Common Share
Basic and diluted lossincome (loss) per share for the three and nine months ended September 30,March 31, 2024 and 2023, and 2022, respectively, were as follows: 
Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
Numerator:
Net loss available to stockholders$(481,573)$(256,712)$(2,751,711)$(1,023,521)
Denominator:
Weighted average shares outstanding - Basic24,850,261 24,850,261 24,850,261 24,850,261 
Effect of dilutive securities:
Stock options— — — — 
Weighted average shares outstanding - Diluted24,850,261 24,850,261 24,850,261 24,850,261 
Basic loss per share$(0.02)$(0.01)$(0.11)$(0.04)
Diluted loss per share$(0.02)$(0.01)$(0.11)$(0.04)
Anti-dilutive shares underlying stock options outstanding1,829,051 971,001 1,829,051 836,001 

Three Months Ended
March 31, 2024March 31, 2023
Numerator:
Net loss available to stockholders$(1,104,967)$(1,490,029)
Denominator:
Weighted average shares outstanding - Basic24,850,261 24,850,261 
Effect of dilutive securities:
Stock options— — 
Weighted average shares outstanding - Diluted24,850,261 24,850,261 
Basic loss per share$(0.04)$(0.06)
Diluted loss per share$(0.04)$(0.06)
Anti-dilutive shares underlying stock options outstanding2,081,772 1,744,351 

Note 4.Inventories, net
Inventories at September 30, 2023March 31, 2024 and December 31, 20222023 consisted of the following:

March 31, 2024March 31, 2024December 31, 2023
September 30, 2023December 31, 2022
Raw materials, netRaw materials, net$9,545,184 $9,001,491 
Raw materials, net
Raw materials, net
Work-in-processWork-in-process706,731 498,139 
Finished goods787,398 983,099 
Finished goods, net
Total inventories, netTotal inventories, net$11,039,313 $10,482,729 


Note 5. Property, Plant and Equipment, net

Property, plant and equipment at September 30, 2023March 31, 2024 and December 31, 20222023 consisted of the following:
Estimated Useful
Life (in Years)
September 30, 2023December 31, 2022
Estimated Useful
Life (in Years)
Estimated Useful
Life (in Years)
March 31, 2024December 31, 2023
Energy systemsEnergy systems1 - 15 years$2,810,232 $2,810,232 
Machinery and equipmentMachinery and equipment5 - 7 years1,758,601 1,624,885 
Furniture and fixturesFurniture and fixtures5 years206,865 196,007 
Computer softwareComputer software3 - 5 years192,865 192,865 
Leasehold improvementsLeasehold improvements*466,789 466,789 
 5,435,352 5,290,778 
5,487,435
Less - accumulated depreciation and amortizationLess - accumulated depreciation and amortization (4,180,696)(3,883,058)
Property, plant and equipment, net
 $1,254,656 $1,407,720 
* Lesser of estimated useful life of asset or lease term

Depreciation and amortization expense on property and equipment for the three months ended March 31, 2024 and 2023 was $94,838 and $117,492, respectively.
11
9

TECOGEN INC.
Notes to Condensed Consolidated Financial Statements

    Depreciation and amortization expense on property and equipment for the three and nine months ended September 30, 2023 and 2022 was $112,783 and $352,192 and $125,755 and $376,365, respectively. During the nine months ended September 30, 2023, we received proceeds of $16,863 from the disposition of certain assets and reversed $8,687 of accrued decomissioning costs from a former ADG energy site, realizing a gain of $19,950. During the nine months ended September 30, 2022, we received proceeds of $72,655 from the disposition of certain assets, realizing a gain of $41,931.


Note 6. Intangible Assets and Liabilities Other Than Goodwill

As of September 30, 2023March 31, 2024 and December 31, 20222023 we had the following amounts related to intangible assets and liabilities other than goodwill:
September 30, 2023December 31, 2022
March 31, 2024March 31, 2024December 31, 2023
Intangible assetsIntangible assetsCostAccumulated AmortizationTotalCostAccumulated AmortizationTotalIntangible assetsCostAccumulated AmortizationTotalCostAccumulated AmortizationTotal
Product certificationsProduct certifications$777,465 $(639,073)$138,392 $777,465 $(584,863)$192,602 
PatentsPatents888,910 (474,882)414,028 888,910 (405,140)483,770 
Developed technologyDeveloped technology240,000 (168,000)72,000 240,000 (156,000)84,000 
TrademarksTrademarks26,896 — 26,896 26,896 — 26,896 
In Process R&DIn Process R&D263,936 (94,263)169,673 263,936 (65,984)197,952 
Favorable contract assetFavorable contract asset384,465 (375,213)9,252 384,465 (372,091)12,374 
Customer contract1,591,327 (113,666)1,477,661 — — — 
$4,172,999 $(1,865,097)$2,307,902 $2,581,672 $(1,584,078)$997,594 
Customer contracts
$
Intangible liabilityIntangible liability
Intangible liability
Intangible liability
Unfavorable contract liabilityUnfavorable contract liability$2,618,168 $(1,968,383)$649,785 $2,618,168 $(1,797,951)$820,217 
Unfavorable contract liability
Unfavorable contract liability
The aggregate amortization expense related to intangible assets and liabilities exclusive of unfavorable contract related intangibles for the three and nine months ended September 30,March 31, 2024 and 2023 was $92,756 and 2022 was $113,477 and $280,671 and $49,885 and $150,376, respectively.$49,361. The net credit to cost of sales related to the amortization of the unfavorable contract related intangible asset and liability for the three and nine months ended September 30,March 31, 2024 and 2023 was $47,459 and 2022 was $54,576 and $170,084 and $69,370 and $202,753, respectively.$60,933, respectively

Favorable/Unfavorable Contract Assets and Liabilities and Customer Contract AssetsNon-Contracted Related Intangibles

The favorable contract asset and unfavorable contract liability in the foregoing table represent the estimated fair value of American DG Energy's customer contracts (both positive for favorable contracts and negative for unfavorable contracts) which were acquired by us in May 2017 and include2017. The customer contract asset includes the customer relationship contractmaintenance contracts acquired by us inon April 1, 2023 and February 1, 2024, as part of the Aegis acquisition. The American DG Energy's favorableacquisition (see Note 7. "Aegis Contract and unfavorable contract contracts are being amortized on a straight-line basis over the contract term, which varies by customer contract. The Aegis customer relationship contract is being amortized on a straight-line basis over a period of seven (7) years which is consistent with the projected revenue recognition.Related Asset Acquisition.")

12

TECOGEN INC.
Notes to Condensed Consolidated Financial Statements

Amortization of intangibles including contract related amounts is calculated using the straight-line method over the remaining useful life or contract term.term, which range from approximately 1-11 years, and is charged against cost of sales and general & administrative expenses in the accompanying consolidated statement of operations. Aggregate future amortization over the next five years and thereafter as of September 30, 2023March 31, 2024 is estimated to be as follows:
Non-contract Related IntangiblesContract Related IntangiblesTotal
Year 1$172,412 $26,242 $198,654 
Year 2178,779 111,624 290,403 
Year 3174,763 153,964 328,727 
Year 4172,340 167,176 339,516 
Year 563,940 175,750 239,690 
Thereafter41,111 193,120 234,231 
Total$803,345 827,876 $1,631,221 

We recognized a gain on termination of unfavorable contract liability of $71,375 in the nine months ended September 30, 2022 due to the closing of certain energy production sites.
Non-contract Related IntangiblesContract Related IntangiblesTotal
Year 1$183,995 $1,883 $185,878 
Year 2168,489 67,329 235,818 
Year 3162,381 102,012 264,393 
Year 4138,362 109,678 248,040 
Year 520,621 113,122 133,743 
Thereafter20,620 866,136 886,756 
Total$694,468 1,260,160 $1,954,628 

Note 7.Sale of Energy Producing Assets and Goodwill Impairment
    During the first quarter of 2019 we recognized two individual sales of energy producing assets, for a total of eight power purchase agreements, including the associated energy production contracts for total consideration of $7 million.
    In connection with these assets sales, we entered into agreements with the purchaser to maintain and operate the assets over the remaining periods of the associated energy production contracts (through August 2033 and January 2034, respectively) in exchange for monthly maintenance and operating fees. These agreements contain provisions whereby we have guaranteed to the purchaser a minimum level or threshold of cash flows from the associated energy production contracts. In October 2021 the minimum guarantee with respect to one of the energy purchase agreements was modified by reducing the guaranteed minimum collections by $35,000 per year, the guaranteed minimum collection amount associated with one site that was sold by the customer. Actual results are compared to the minimum threshold bi-annually and we are contractually obligated to reimburse any shortfall to the purchaser. To the extent actual cash flow results exceed the minimum threshold, we are entitled to fifty percent of such excess under the agreements. Based upon an analysis of these energy producing assets expected future performance, as of September 30, 2023, we do not expect to make any material payments under the guarantee.
At September 30, 2023, there were no amounts due under the energy production contracts.
    The foregoing agreements also contain provisions whereby we have agreed to make whole the purchaser in the event the counterparty to the energy production contract(s) defaults on or otherwise terminates before the stated expiration of the energy production contract. If we are required to make whole the purchaser under such provisions, we expect to be able to recover from the counterparty to the energy production contract(s) under a similar provision contained in those contracts in respect of early termination.
    We are also responsible under the agreements for site decommissioning costs, if any, in excess of certain threshold amounts by site. Decommissioning of site assets is performed when, if and as requested by the counterparty to the energy production contract upon termination of the energy production contract.    

Note 8.Aegis Contract and Related Asset AcquisitionAcquisitions

On March 15, 2023, we entered into an agreement ("Agreement") with Aegis Energy Services, LLC (“Aegis”) pursuant to which Aegis agreed to assign to us and we agreed to assume certain Aegis maintenance agreements weand agreed to purchase certain assets from Aegis, and related matters (“Acquisition”). On April 1, 2023, the Acquisition closed. Under the Agreement, we agreed to acquire from Aegis and assume Aegis’ rights and obligations arising on or after April 1, 2023, under
10

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Notes to Condensed Consolidated Financial Statements

maintenance agreements pursuant to which Aegis provided maintenance services to third parties for approximately 200 cogeneration systems and we agreed to acquire from Aegis certain vehicles and inventory used by Aegis in connection with the performance of its maintenance services. At closing, we acquired eight (8) Aegis vehicles for consideration consisting of $170,000 in cash. Also, we issued credits against outstanding accounts receivable due from Aegis in the amount of $300,000 for the acquisition of inventory that Aegis used to provide maintenance services. At closing, we hired eight (8) Aegis
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Notes to Condensed Consolidated Financial Statements

employees who, following the closing, have agreed to continue to provide maintenance services relating to the cogeneration systems covered by the maintenance agreements assumed pursuant to the Agreement. Following the closing and for a period of up to seven (7) years, we agreed to pay Aegis a percentage of the revenue collected for maintenance services provided pursuant to the maintenance agreements acquired from Aegis. Further, prior to December 31, 2023, we have the right to acquire and assume additional Aegis’ maintenance agreements for cogeneration systems on substantially similar terms and conditions. As of September 30, 2023, we have not acquired or assumed any additional maintenance agreements from Aegis. The Agreement contained certain indemnification provisions and agreements on the part of Aegis and for each party to cooperate with each other and provide certain transitional assistance. We acquired the Aegis maintenance agreements to expand our Service portfolio and to benefit from the long-term contract revenue stream generated by these agreements.
On February 1, 2024, Tecogen and Aegis amended the Agreement to add eighteen (18) additional maintenance contracts (the "Amendment"). The Amendment includes an undertaking by Aegis to use commercially reasonable efforts to support and assist our execution of maintenance service agreements for an additional thirty-six (36) cogeneration units sold to customers by Aegis. No additional maintenance service agreements have been executed as of March 31, 2024.
We have determined that the assignment and assumption of the Aegis maintenance agreements, in combination with the related asset acquisition and the retention of the former Aegis employees, constitutes a business and should be accounted for as a business combination under the acquisition method. As of the acquisition date, we recognized, separately from goodwill, the identifiable assets acquired and the liabilities assumed, at fair value.

We have applied an interpretation of the guidance in ASC 805, Business Combinations, that allows an entity to combine multiple acquisitions as one single transaction due to the April 1, 2023 and February 1, 2024 acquisitions being executed in contemplation of one another to achieve the same commercial objective for the Company. As a result, we have adjusted the initial accounting for the April 1, 2023 acquisition for the value of net assets acquired from the February 1, 2024 acquisition.
We have included the financial results of the Aegis maintenance agreements in our consolidated financial statements from April 1, 2023, and from February 1, 2024, the closing or acquisition date.

dates for the acquisitions.
The following table summarizes the consideration paid for the Aegis acquisitionacquisitions and the fair value of assets acquired and contract-related liabilities assumed as of the respective acquisition date:date for each acquisition date along with the combined accounting result:
April 1, 2023February 1, 2024Total
Consideration Paid:
Cash$170,000 $— $170,000 
Accounts receivable credit issued300,000 — 300,000 
Account payable due to Aegis91,048 — 91,048 
Contingent consideration1,256,656 92,409 1,349,065 
Total fair value of consideration transferred1,817,704 92,409 1,910,113 
Identifiable assets acquired and liabilities assumed:
Assets acquired
Property, plant and equipment170,000 — 170,000 
Inventory391,048 — 391,048 
Identifiable intangible asset - customer contracts1,772,659 189,639 1,962,298 
2,333,707 189,639 2,523,346 
Acquired contract-related liabilities assumed
Deferred maintenance reserve(853,271)— (853,271)
Net identifiable assets acquired1,480,436 189,639 1,670,075 
Excess of cost over fair value of net assets acquired (Goodwill)$337,268 $(97,230)$240,038 

Consideration Paid:
Cash$170,000 
Accounts receivable credit issued300,000 
Account payable91,048 
Contingent consideration1,442,462 
Total fair value of consideration transferred2,003,510 
Identifiable assets acquired and liabilities assumed:
Assets acquired
Property, plant and equipment170,000 
Inventory391,048 
Identifiable intangible asset - customer contracts1,591,327 
2,152,375 
Acquired contract-related liabilities assumed
Deferred maintenance reserve(871,856)
(871,856)
Net identifiable assets acquired1,280,519 
Excess of cost over fair value of net assets acquired (Goodwill)$722,991 

Initial Acquisition - April 1, 2023
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Notes to Condensed Consolidated Financial Statements

The amounts initially recognized for inventory, identifiable intangible assets, contingent consideration and deferred maintenance reserves were provisional pending completion of the necessary valuations and analysis. ASC 805 establishes a measurement period to provide companies with a reasonable amount of time to obtain the information necessary to identify and measure various items in a business combination and cannot extend beyond one year from the acquisition date. As of December 31, 2023, we have completed our analysis and valuation.
As of March 31, 2024, we recorded no adjustments to the fair value of the contingent consideration and deferred maintenance reserves given the probability of achieving the revenue estimates and the actual and expected maintenance costs were were consistent with our initial valuation.
Second Acquisition - February 1, 2024
The amounts initially recognized for identifiable intangible assets and contingent consideration are provisional pending completion of the necessary valuations and analysis. ASC 805 establishes a measurement period to provide companies with a reasonable amount of time to obtain the information necessary to identify and measure various items in a business combination and cannot extend beyond one year from the acquisition date. DuringAs of March 31, 2024, we have not completed our analysis and valuation for the three months ended September 30, 2023, we identified a $20,130 adjustment to decrease the accounts payable assumed and inventory acquired which had no impact on goodwill balance.second maintenance service agreement acquisition.
Acquisition Valuation
The fair value of the contingent considerationidentifiable intangible asset was estimated using the income approach. The excess cash flow was discounted to present value using an appropriate rate of return to estimate the market value of the customer identifiable intangible asset and the risks associated with the future revenue forecasts due to potential changes in customer energy requirements or changes in the economic viability of these CHP sites which depend on the spread between natural gas fuel and electricity prices, all of which are not within our control. Key assumptions to value the customer identifiable intangible asset included athe discount rate of 15%, profitability assumptions, revenue assumptions, and anticipated existing contract run out and forecasted revenue.were the material assumptions utilized in the discounted cash flow model used to estimate fair value. The discount rate reflects an estimate of our weighted-average cost of capital.
On the date of acquisition, the fair value of the contingent consideration and the deferred maintenance reserve were calculated under the income approach using a weighted average cost of capital of 12%15%, discounting the future cash flows to present value, and are subsequently remeasured to fair value at each reporting date until the fair value contingencies are resolved. Fair value adjustments which may be determined at subsequent reporting dates will be recorded in our consolidated statements of
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Notes to Condensed Consolidated Financial Statements

operations and will not impact the goodwill balance. As of September 30, 2023, we did not remeasurebalance after the contingent consideration and deferred maintenance reserves given the probability of achieving the revenue estimates and deferred maintenance costs were consistent with our initial valuation.measurement period.
The contingent consideration is payable within forty-five (45) days following the end of each calendar quarter through the earlier of the expiration or termination of the relevant maintenance agreements, or the seventh (7th) anniversary of the acquisition date. The consideration is equal to the product of the revenues collected in a calendar quarter multiplied by an applicable percentage. The agreement stipulates quarterly aggregate revenue targets and an applicable percentage, and provides for a higher applicable percentage if revenues exceed the target revenues. The applicable percentage ranges from 5% to 10% over the agreement term. The deferred maintenance reserve represents costs, which are expected to be incurred over a three-year period from the date of acquisition to repair customer equipment thatwhich had not been properlysufficiently maintained prior to our acquisition of the maintenance service agreements.
Revenues and gross profit from the Aegis maintenance contracts since the acquisition date were $1,231,537 and $766,804, respectively, for the nine months ended September 30, 2023 and are included in our Services segment.
The purchase price of the acquisition was allocated to the tangible and intangible assets acquired and liabilities assumed and recognized at their fair value based on widely accepted valuation techniques in accordance with ASC 820, "Fair Value Measurement," as of the acquisition date. The process for estimating fair value requires the use of significant assumptions and estimates of future cash flows and developing appropriate discount rates. The excess of the purchase price over fair value of the net identified assets acquired and liabilities assumed was recorded as goodwill. Goodwill is primarily attributable to the going concern element of the Aegis business, including its assembled workforce and the long-term nature of the customer maintenance agreements, as well as anticipated cost synergies due primarily to the elimination of administrative overhead. Goodwill resulting from the Aegis acquisition is not expected to be deductible for income tax purposes.
Acquisition-related costs which consisted on recurring internal resources were de minimus and such costs were expensed as incurred (ASC 805-50-30-1).

The following table summarizes the contract-related liabilities assumed as of September 30,March 31, 2024 and December 31, 2023:

September 30, 2023
Acquisition liabilities, current
Contingent consideration$205,246 
Deferred maintenance reserve570,745 
775,991 
Acquisition liabilities, long-term
Contingent consideration1,206,077 
Deferred maintenance reserve279,600 
$1,485,677 
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Notes to Condensed Consolidated Financial Statements

March 31, 2024December 31, 2023
Acquisition liabilities, current
Contingent consideration$237,928 $200,639 
Deferred maintenance reserve691,483 644,724 
929,411 845,363 
Acquisition liabilities, long-term
Contingent consideration1,016,558 994,743 
Deferred maintenance reserve140,277 187,036 
$1,156,835 $1,181,779 

Revenues and gross profit from the Aegis maintenance contracts were $758,762 and $485,044, respectively, for the three months ended March 31, 2024 and are included in our Services segment.
We are unable to provide the pro forma information required under ASC 805-10-50-2(h) as the disclosure is impracticable since the required pre-acquisition historical information could not be obtained from Aegis.

Note 8.Sale of Energy Producing Assets
    During the first quarter of 2019 we recognized two individual sales of energy producing assets for a total of eight power purchase agreements, including the associated energy production contracts, for total consideration of $7 million.
    In connection with these assets sales, we entered into agreements with the purchaser to maintain and operate the assets over the remaining periods of the associated energy production contracts (through August 2033 and January 2034, respectively) in exchange for monthly maintenance and operating fees. These agreements contain provisions whereby we have guaranteed to the purchaser a minimum level or threshold of cash flows from the associated energy production contracts. Actual results are compared to the minimum threshold bi-annually and we are contractually obligated to reimburse any shortfall to the purchaser. To the extent actual cash flow results exceed the minimum threshold, we are entitled to fifty percent of such excess under the agreements. Based upon an analysis of these energy producing assets' expected future performance, as of March 31, 2024, we do not expect to make any material payments under the guarantee.
At March 31, 2024, we were due $25,633 under the energy production contracts, representing 50% of the excess cash flows above the minimum threshold for the bi-annual period ended December 31, 2023. We expect to receive these funds in the second quarter of 2024.
    The foregoing agreements also contain provisions whereby we have agreed to make whole the purchaser in the event the counterparty to the energy production contract(s) defaults on or otherwise terminates before the stated expiration of the energy production contract. Should we be required to make whole the purchaser under such provisions, we would be entitled to seek recovery from the counterparty to the energy production contract(s) under a similar provision contained in those contracts in respect of early termination.
    We are also responsible under the agreements for site decommissioning costs, if any, in excess of certain threshold amounts by site. Decommissioning of site assets is performed when, if and as requested by the counterparty to the energy production contract upon termination of the energy production contract.    
Note 9.Leases
    Our leases principally consist of operating leases related to our corporate office, field offices, and our research, manufacturing, and storage facilities.
At lease inception, we determine if an arrangement constitutes a lease and whether that lease meets the classification criteria of a finance or operating lease. Some of our lease agreements contain lease components (e.g. minimum rent payments) and non-lease components (e.g. maintenance, labor charges, etc.). We account for each component separately based on the estimated standalone price of each component.
Operating Leases
Operating leases are included in Right-of-use assets, Lease obligations, current and Long-term liabilities - Lease obligations, net of current portion, on the condensed consolidated balance sheets. These assets and liabilities are recognized at the commencement date based on the present value of remaining lease payments over the lease term and using an incremental
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Notes to Condensed Consolidated Financial Statements

borrowing rate consistent with the lease terms or implicit rates when readily determinable. For those leases where it is reasonably certain at the commencement date that we will exercise the option to extend the lease, then the lease term will include the lease extension term. Short-term operating leases, which have an initial term of 12 months or less, are not recorded on the balance sheet.
On March 31, 2023, we entered into two lease agreements for two adjoining buildings, located in North Billerica, Massachusetts, containing approximately 26,412 square feet of manufacturing, storage and office space to serve as our headquarters and manufacturing facilities. The lease agreements provide for initial lease terms of five (5) years with two successive options to renew for additional terms of five (5) years. Both leases commence on January 1, 2024 and require payment of the base rent, real estate taxes, common maintenance expenses and aggregate deposits of $38,200. Our costs for initial improvements required to the leased premises is estimated to range between $500,000 and $750,000. The estimated straight-line monthly rent expense for the initial term of the lease is approximately $26,962 per month. In accordance with ASC 842-20-30-1, we recorded the lease liability and right-of-use asset using the discount rate for the lease upon the lease commencement date, January 1, 2024. On January 1, 2024 we extended our lease for the 2,800 square foot Valley Stream, NY service center for an additional three (3) years through December 31, 2026, with an option to renew for an additional term of three (3) years. The straight-line base monthly rent for the extension is $4,560 per month. On February 1, 2024 we entered into a lease agreement for 2,063 square feet of office and storage space in East Syracuse, New York for an initial lease term of three (3) years, expiring on January 31, 2027, with an option for an additional lease term of two (2) years. The straight-line base monthly rent for the initial lease term is $1,891 per month.
The lease on our former headquarters located in Waltham, Massachusetts which consists of approximately 43,000 square feet of manufacturing, storage and office space, expired on April 30, 2024. The base monthly rent in 2024 was $44,254.
Lease expense for operating leases, which principally consists of fixed payments for base rent, is recognized on a straight-line basis over the lease term. Operating lease expense for the three months ended March 31, 2024 and 2023 was $271,562 and $189,715, respectively.
Supplemental information related to operating leases for the three months ended March 31, 2024 and 2023 was as follows:
March 31, 2024March 31, 2023
Cash paid for amounts included in the measurement of operating lease liabilities$269,836 $184,072 
Right-of-use assets obtained in exchange for operating lease liabilities$1,429,977 $— 
Weighted-average remaining lease term - operating leases4.7 Years3.6 Years
Weighted-average discount rate - operating leases7.5 %6.0 %

Supplemental balance sheet information related to operating leases as of March 31, 2024 and December 31, 2023 was as follows:
March 31, 2024December 31, 2023
Operating leases
Right-of-use assets$1,986,087 $743,096 
Operating lease liability, current$438,334 $248,933 
Operating lease liability, long-term1,573,793 523,660 
Total operating lease liability$2,012,127 $772,593 

Finance Leases
Finance leases are included in Right-of-use assets, Lease obligations, current and Long-term liabilities - Lease obligations, net of current portion, on the condensed consolidated balance sheets. These assets and liabilities are recognized at the commencement date based on the present value of remaining lease payments over the lease term and using an incremental borrowing rate consistent with the lease terms or implicit rates, when readily determinable. For those leases where it is reasonably certain at the commencement date that we will exercise the option to extend the lease, then the lease term will include the lease extension term. Short-term operating leases, which have an initial term of 12 months or less, are not recorded on the balance sheet.Effective December 19, 2023, we entered into a master finance lease agreement for motor vehicles and acquired five (5) service vehicles.
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Notes to Condensed Consolidated Financial Statements

    Lease expense
Supplemental information for operatingfinance leases which principally consist of fixed payments for base rent, is recognized on a straight-line basis over the lease term. Lease expense for the three and nine monthsyear ended September 30,December 31, 2023 and 2022 was $209,506 and $616,062 and $201,578 and $608,652, respectively.is as follows:
December 31, 2023
Right-of-use assets obtained in exchange for finance lease liabilities$200,187 
Weighted-average remaining lease term - finance leases5.0 years
Weighted-average discount rate - finance leases10.4 %

Supplemental balance sheet information related to finance leases for the nine months ended September 30,as of March 31, 2024 and December 31, 2023 and 2022 is as follows:
Nine Months Ended September 30,
20232022
Cash paid for amounts included in the measurement of operating lease liabilities$558,028 $549,402 
Right-of-use assets obtained in exchange for operating lease liabilities$— $— 
Weighted-average remaining lease term - operating leases3.90 years3.60 years
Weighted-average discount rate - operating leases%%
March 31, 2024December 31, 2023
Finance leases
Right-of-use assets - motor vehicles$190,177 $200,187 
Finance lease liability, current$31,428 $40,540 
Finance lease liability, long-term151,483 159,647 
Total finance lease liability$182,911 $200,187 
Supplemental information related to operating leases as of September 30, 2023 and December 31, 2022 is as follows:
September 30, 2023December 31, 2022
Operating leases
Right-of-use assets$754,957 $1,245,549 
Operating lease liability, current$367,938 $687,589 
Operating lease liability, long-term429,737 623,452 
Total operating lease liability$797,675 $1,311,041 
Future minimum lease commitments under non-cancellable operating and finance leases as of September 30, 2023March 31, 2024 were as follows:
 Operating Leases
Year 1$398,741 
Year 2127,092 
Year 3119,902 
Year 461,044 
Year 553,752 
Thereafter130,553 
Total lease payments891,084 
Less: imputed interest93,409 
Total$797,675 
The lease for our headquarters located in Waltham, Massachusetts which consists of approximately 43,000 square feet of manufacturing, storage and office space, expires on March 31, 2024. Currently, our monthly base rent is $44,254. On March 31, 2023, we entered into two lease agreements for two adjoining buildings, located in Billerica, Massachusetts, containing approximately 26,412 square feet of manufacturing, storage and office space to serve as our headquarters and manufacturing facilities. The lease agreements provide for initial lease terms of five (5) years with two successive options to renew for additional terms of five (5) years. Both leases commence on January 1, 2024 and require payment of the base rent, real estate taxes, common maintenance expenses and aggregate deposits of $38,200. Our costs for initial improvements required to the leased premises is estimated to range between $1,000,000 and $1,250,000. The estimated straight-line monthly rent expense for the initial term of the lease is approximately $24,800 per month. In accordance with ASC 842-20-30-1, we will record the lease liability and right-of-use asset using the discount rate for the lease upon the lease commencement date.
Operating LeasesFinance LeasesTotal
Year 1$563,175 $48,931 $612,106 
Year 2498,686 48,931 547,617 
Year 3472,862 48,931 521,793 
Year 4421,503 48,931 470,434 
Year 5302,960 36,699 339,659 
Thereafter103,230 — 103,230 
Total lease payments2,362,416 232,423 2,594,839 
Less: imputed interest350,289 49,512 399,801 
Total$2,012,127 $182,911 $2,195,038 

Note 10. Stock-Based Compensation
Note 10.Stock-Based Compensation

Stock-Based Compensation
We adopted a 2006 Stock Option and Incentive Plan, or the Plan, under which the Board of Directors may grant incentive or non-qualified stock options and stock grants to key employees, directors, advisors and consultants. The Plan was amended at various dates by the Board of Directors to increase number ofthe reserved shares of common stock authorized to be issued
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Notes to Condensed Consolidated Financial Statements

issuable under the Amended Plan to 3,838,750 as of September 30, 2023,March 31, 2024, and in June 2017 stockholders approved an amendment to extend the termination date of the Plan to January 1, 2026 and ratified and approved option grants issued after January 1, 2016 ("Amended Plan").2026.
Stock options vest based upon the terms within the individual option grants, with an acceleration of the unvested portion of such options upon a change in control event, as defined in the Amended Plan. The options are not transferable except by will or by the laws of descent and distribution.domestic relations order. The option price per share under the Amended Plan cannot be less than the fair market value of the underlying shares on the date of the grant. The number of shares remaining available for future issuance under the Amended Plan as of September 30, 2023March 31, 2024 was 191,193.1,008,368.
During the ninethree months ended September 30, 2023,March 31, 2024, we did not grant any options to purchase shares of common stock under the Amended Plan.
We adopted the 2022 Stock Incentive Plan (the "2022 Plan"), under which the Board of Directors may grant incentive or non-qualified stock options and stock grants to key employees, directors, advisors and consultants. Under the 2022 Plan, We have reserved
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Notes to Condensed Consolidated Financial Statements

3,800,000 shares of our shares of our common stock are authorized for issuance pursuant to awards under the 2022 Plan. The adoption of the 2022 Plan was approved by our shareholders on June 9, 2022.
Under the 2022 Plan, stock options vest based upon the terms within the individual option grants, with an acceleration of the unvested portion of such options upon a change in control event, as defined in the 2022 Plan. The options are not transferable except by will or domestic relations order. The option price per share under the 2022 Plan cannot be less than the fair market value of the underlying shares on the date of the grant. The number of shares remaining available for future issuance under the Plan as of September 30, 2023March 31, 2024 was 3,025,000.3,068,750.
During the ninethree months ended September 30, 2023,March 31, 2024, we granted non-qualifieddid not grant any options to purchase an aggregate of 575,000 shares of our common stock at exercise prices ranging between $0.88 - $1.10 per share to certain directors, officers and employees. These options have a vesting schedules of two or four years and expire in ten years. The fair value ofunder the options issued in 2023 was $244,625. The weighted-average grant date fair value of stock options granted during 2023 was $0.43 per share.2022 Plan.
Stock option activity for the ninethree months ended September 30, 2023March 31, 2024 was as follows: 
Common Stock OptionsCommon Stock OptionsNumber of
Options
Exercise
Price
Per
Share
Weighted
Average
Exercise
Price
Weighted
Average
Remaining
Life
Aggregate
Intrinsic
Value
Common Stock OptionsNumber of
Options
Exercise
Price
Per
Share
Weighted Average Exercise PriceWeighted
Average
Remaining
Life
Aggregate
Intrinsic
Value
Outstanding, December 31, 20223,204,297 $0.71 $10.33 $1.61 7.30 years$882,074 
Outstanding, December 31, 2023
GrantedGranted575,000 $0.88 $1.10 $0.93 
Exercised
Exercised
ExercisedExercised— 
Canceled and forfeitedCanceled and forfeited(44,800)$2.86 
Outstanding, September 30, 20233,734,497 $1.10 $3.20 $1.49 7.14 years$188,529 
Exercisable, September 30, 20231,931,322 $1.97 $112,578 
Vested and expected to vest, September 30, 20233,462,521 $0.71 $10.33 $1.53  $177,136 
Canceled and forfeited
Canceled and forfeited
Outstanding, March 31 2024
Outstanding, March 31 2024
Outstanding, March 31 2024
Exercisable, March 31, 2024
Vested and expected to vest, March 31, 2024
Consolidated stock-based compensation expense for the three and nine months ended September 30,March 31, 2024 and 2023 was $44,535 and 2022 was $68,775 and $174,711 and $69,118 and $254,718,$77,348, respectively. No tax benefit was recognized related to the stock-based compensation recorded during the period.
At September 30, 2023March 31, 2024, the total compensation cost related to unvested stock option awards not yet recognized is $568,334$362,187 and this amount will be recognized over a weighted average period of 2.642.44 years.

Note 11. Fair Value Measurements
    The fair value topic of the FASB Accounting Standards Codification defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The accounting guidance also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs, where available, and minimize the use of unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:
Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities. We currently do not have any Level 1 financial assets or liabilities.
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Notes to Condensed Consolidated Financial Statements

Level 2 - Observable inputs other than quoted prices included in Level 1. Level 2 inputs include quoted prices for identical assets or liabilities in non-active markets, quoted prices for similar assets or liabilities in active markets and inputs other than quoted prices that are observable for substantially the full term of the asset or liability. We have Level 2 financial assets and liabilities as provided below.
Level 3 - Unobservable inputs reflecting management’s own assumptions about the input used in pricing the asset or liability. We do not currently have any Level 3 financial assets or liabilities.
    The following tables present the asset reported in "other assets" in the consolidated balance sheet measured at its fair value on a recurring basis as of September 30, 2023 and 2022 by level within the fair value hierarchy.
September 30, 2023Quoted prices in active markets for identical assetsSignificant other observable inputsSignificant unobservable inputsUnrealized
DescriptionTotalLevel 1Level 2Level 3 Gains /(Losses)
Recurring fair value measurements
    Marketable equity securities
          EuroSite Power Inc.$74,995 $— $74,995 $— $(18,749)
Total recurring fair value measurements$74,995 $— $74,995 $— $(18,749)
September 30, 2022Quoted prices in active markets for identical assetsSignificant other observable inputsSignificant unobservable inputsUnrealized
DescriptionTotalLevel 1Level 2Level 3Gains /(Losses)
Recurring fair value measurements
Marketable equity securities
EuroSite Power Inc.$112,492 $— $112,492 $— $37,497 
Total recurring fair value measurements$112,492 $— $112,492 $— $37,497 
    We utilize a Level 2 category fair value measurement to value our investment in EuroSite Power, Inc. as a marketable equity security at period end. That measurement is equal to the quoted market closing price at period end. Since this security is not actively traded we classify it as Level 2.
    The following table summarizes changes in Level 2 assets which are comprised of marketable equity securities for the nine months ended September 30, 2023 and 2022:


Fair value at December 31, 2022$Note 11.93,744 Related Party Notes
Unrealized losses(18,749)
Fair value at September 30, 2023$74,995 
Fair value at December 31, 2021$74,995 
Unrealized gains37,497 
Fair value at September 30, 2022$112,492 

Note 12. Commitments and Contingencies
On November 23, 2022, we were served with a suit filed against us on August 24, 2022 in the Ontario Superior Court of Justice by The Corporation of the Town of Milton, Milton Energy Generation Solutions Inc. and Milton Hydro Distribution Inc (the "Plaintiffs"), all of whom are municipal corporations incorporated in the Province of Ontario. The plaintiffs sued for damages in the amount of CDN $1,000,000, pre-judgment and post-judgment interest, legal fees, and any further relief the court
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Notes to Condensed Consolidated Financial Statements

may deem, alleging breach of contract, breach of warranty, negligent misrepresentations and nuisance. Plaintiffs allege that on or about July 10, 2022, a Tecogen cogenerator installed by us at the plaintiffs facility caught fire, causing damage to the cogenerator and the plaintiff's facility. We have filed a response denying liability and are being represented by Canadian counsel. For the year ended December 31, 2022, we reserved $150,000 for anticipated damages which may not be covered by our insurance and continue to maintain the reserve at September 30, 2023.
Note 13. Segments
    As of September 30, 2023, we were organized into three (3) operating segments through which senior management evaluates our business. These segments, as described in more detail in Note 1, are organized around the products and services provided to customers and represent our reportable segments. The following table presents information by reportable segment for the three and nine months ended September 30, 2023 and 2022:
ProductsServicesEnergy ProductionCorporate, other and elimination (1)Total
Three Months Ended September 30, 2023
Revenue - external customers$2,938,789 $3,842,600 $331,141 $— $7,112,530 
Intersegment revenue— 48,085 — (48,085)— 
   Total revenue$2,938,789 $3,890,685 $331,141 $(48,085)$7,112,530 
Gross profit$1,269,042 $1,496,216 $160,763 $— $2,926,021 
Identifiable assets$10,591,087 $13,270,545 $3,203,776 $2,121,337 $29,186,745 
Nine Months Ended September 30, 2023
Revenue - external customers$7,094,556 $10,931,744 $1,214,806 $— $19,241,106 
Intersegment revenue— 202,442 — (202,442)— 
   Total revenue$7,094,556 $11,134,186 $1,214,806 $(202,442)$19,241,106 
Gross profit$2,593,785 $4,771,889 $486,682 $— $7,852,356 
Identifiable assets$10,591,087 $13,270,545 $3,203,776 $2,121,337 $29,186,745 
Three Months Ended September 30, 2022
Revenue - external customers$3,206,732 $3,078,604 $332,774 $— $6,618,110 
Intersegment revenue— 41,390 — (41,390)— 
Total revenue$3,206,732 $3,119,994 $332,774 $(41,390)$6,618,110 
Gross profit$1,132,489 $1,596,249 $164,596 $— $2,893,334 
Identifiable assets$10,639,810 $10,308,988 $3,754,321 $5,368,204 $30,071,323 
Nine Months Ended September 30, 2022
Revenue - external customers$10,156,328 $9,046,075 $1,268,623 $— $20,471,026 
Intersegment revenue— 199,059 — (199,059)— 
Total revenue$10,156,328 $9,245,134 $1,268,623 $(199,059)$20,471,026 
Gross profit$3,421,863 $4,723,382 $542,326 $— $8,687,571 
Identifiable assets$10,639,810 $10,308,988 $3,754,321 $5,368,204 $30,071,323 
(1) Corporate, intersegment revenue, other and elimination includes various corporate assets.
19


Note 14. Subsequent Events
    We have evaluated events through the date of the filing of this report and, except as described below, have determined that no material subsequent events occurred that would require disclosure in the unaudited consolidated financial statements for the period ended September 30, 2023 or in the financial notes thereto.
Related Party Loans
On October 9, 2023, we entered into an agreementnote subscription agreements with each of John N. Hatsopoulos, a director and principal shareholder of registrant, and Earl R. Lewis, III, a director of registrant, pursuant to which Mr. Hatsopoulos agreed to provide financing to us of up to $1 million, and Mr. Lewis agreed to provide financing to us of $500,000, and potentially, an additional $500,000 at his discretion. We have the right to determine the amount of the loans at the time of a draw down, subject to the conditions in our agreements with each of Mr. Hatsopoulos and Mr. Lewis discussed below. The loans and terms of the loan agreements were unanimously approved by our board of directors.
The loans bear interest on the outstanding principal at the Internal Revenue Service’s Applicable Federal Rate to be determined at the time we issue a promissory note in connection with a loan drawdown. The principal amount and accrued interest of each loan is repayable one year from the date of issuance of the applicable promissory note. A note may be prepaid by us at any time. The principal amount of each loan and accrued interest is subject to mandatory prepayment in the event of a change of control of the registrant. The promissory notes are subject to customary events of default and are transferable provided the conditions to transfer set forth in the promissory notes are satisfied by the noteholder. The proceeds of the loans are expected to be used for general working capital purposes.
On October 10, 2023, we issued a promissory note and borrowed $500,000 from Mr. Hatsopoulos. The loan bears interest at 5.12% per annum. At March 31, 2024 our obligation to Mr. Hatsopoulos under the promissory note, inclusive of $11,905 of accrued and unpaid interest, was $511,905. On March 21, 2024, John H. Hatsopoulos amended the terms of the promissory note, dated October 10, 2023, extending the maturity date by one year, making the maturity date October 10, 2025, and agreeing to accept payment in cash or Tecogen Inc. common stock.

Proposed Reverse Stock Split
Note 12.Fair Value Measurements

On October 9, 2023, our board    The fair value topic of directors authorized us to seek shareholder approval at a special meeting of our shareholders of an amendment to our Amended and Restated Certificate of Incorporation (“certificate of incorporation”)the FASB Accounting Standards Codification defines fair value as the exchange price that would enable usbe received for an asset or paid to effecttransfer a combinationliability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The accounting guidance also establishes a fair value hierarchy which requires an entity to maximize the use of our outstanding sharesobservable inputs, where available, and minimize the use of common stock into a lesser numberunobservable inputs when measuring fair value. There are three levels of shares, or a reverse stock split. We intendinputs that may be used to seek stockholder approval for three alternative amendments to our certificate of incorporation and to effect the reverse stock split at the alternative ratios of 1 for 4, 1 for 5, or 1 for 6. The determination of the ratio, implementation, and timing of any reverse stock split will be subject to further approval by our board of directors following receipt of shareholder approval at a special meeting of our shareholders.

measure fair value:
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TECOGEN INC.
Management's DiscussionNotes to Condensed Consolidated Financial Statements

Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities. We currently do not have any Level 1 financial assets or liabilities.
Level 2 - Observable inputs other than quoted prices included in Level 1. Level 2 inputs include quoted prices for identical assets or liabilities in non-active markets, quoted prices for similar assets or liabilities in active markets and Analysisinputs other than quoted prices that are observable for substantially the full term of the asset or liability. We have Level 2 financial assets as provided below.
Level 3 - Unobservable inputs reflecting management’s own assumptions about the input used in pricing the asset or liability. We have Level 3 liabilities as provided below.
Available-for-sale equity securities
    The following tables present the asset reported in "other assets" in the consolidated balance sheet measured at its fair value on a recurring basis as of March 31, 2024 and 2023 by level within the fair value hierarchy.
Quoted prices in active markets for identical assetsSignificant other observable inputsSignificant unobservable inputs
TotalLevel 1Level 2Level 3Gains (losses)
March 31, 2024
Recurring fair value measurements
Available-for-sale equity securities
EuroSite Power Inc.$112,493 $— $112,493 $— $18,749 
Total recurring fair value measurements$112,493 $— $112,493 $— $18,749 
March 31, 2023
Recurring fair value measurements
Available-for-sale equity securities
EuroSite Power Inc.$93,744 $— $93,744 $— $— 
Total recurring fair value measurements$93,744 $— $93,744 $— $— 
    We utilize a Level 2 category fair value measurement to value its investment in EuroSite Power, Inc. as a marketable equity security at period end. That measurement is equal to the quoted market closing price at period end. Since this security is not actively traded we classify it as Level 2.
The following table summarizes changes in Level 2 assets which are comprised of marketable equity securities for the three months ended March 31, 2024 and 2023:
Fair value at December 31, 2023$93,744 
Unrealized gains18,749 
Fair value at March 31, 2024$112,493 
Fair value at December 31, 2022$93,744 
Unrealized gains— 
Fair value at March 31, 2023$93,744 

Contingent Contract Consideration
We utilize a Level 3 category fair value measurement to value the contingent contract consideration liability at period end since there are no quoted prices for this liability in non-active markets, there are no quoted prices for similar liabilities in active markets and there are no inputs that are observable for substantially the full term of the the liability. The contingent contract consideration calculation requires management to make estimates and assumptions that affect the reported amount of the liability. The contingent contract consideration is payable each calendar quarter through the earlier of the expiration or termination of the relevant maintenance agreements, or the seventh (7th) anniversary of the acquisition date. The consideration is equal to the product of the revenues collected in a calendar quarter multiplied by an applicable percentage. The agreement
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TECOGEN INC.
Notes to Condensed Consolidated Financial Statements

stipulates quarterly aggregate revenue targets and an applicable percentage, and provides for a higher applicable percentage if revenues exceed the target revenues. The applicable percentage ranges from 5% to 10% over the agreement term. On the date of acquisition, the fair value of the contingent consideration was calculated using a weighted average cost of capital of 15%, discounting the future cash flows to present value.
Quoted prices in active markets for identical assetsSignificant other observable inputsSignificant unobservable inputs
TotalLevel 1Level 2Level 3Total gains (losses)
March 31, 2024
Recurring fair value measurements
Contingent contract consideration
Current$237,928 $— $— $237,928 $— 
Long-term1,016,558 — — 1,016,558 — 
Total recurring fair value measurements$1,254,486 $— $— $1,254,486 $— 
Note 13.Segments
    As of March 31, 2024, we were organized into three operating segments through which senior management evaluates our business. These segments, as described in more detail in Note 1, are organized around the products and services provided to customers and represent our reportable segments. The following table presents information by reportable segment for the three months ended March 31, 2024 and 2023:
ProductsServicesEnergy ProductionCorporate, other and elimination (1)Total
Three Months Ended March 31, 2024
Revenue - external customers$1,491,398 $4,014,310 $680,389 $— $6,186,097 
Intersegment revenue— 117,348 — (117,348)$— 
Total revenue$1,491,398 $4,131,658 $680,389 $(117,348)$6,186,097 
Gross profit$441,855 $1,922,053 $211,749 $— $2,575,657 
Identifiable assets$9,793,634 $12,207,675 $3,295,316 $3,161,918 $28,458,543 
Three Months Ended March 31, 2023
Revenue - external customers$1,710,136 $3,136,173 $533,509 $— $5,379,818 
Intersegment revenue— 88,214 — (88,214)— 
Total revenue$1,710,136 $3,224,387 $533,509 $(88,214)$5,379,818 
Gross profit$497,567 $1,398,572 $195,770 $— $2,091,909 
Identifiable assets$12,023,164 $9,750,153 $3,433,439 $3,036,675 $28,243,431 
(1) Corporate, intersegment revenue, other and elimination includes various corporate assets.
Note 14.Subsequent Events
    We have evaluated events through the date of this filing, and, except as described below, have determined that no material subsequent events occurred that would require recognition in the consolidated financial statements or disclosure in the notes thereto.
On May 1, 2024, Tecogen and Aegis amended the Agreement to add thirty-one (31) additional maintenance contracts (the "Amendment"). The Amendment ("Second Amendment") includes an undertaking by Aegis to use commercially reasonable efforts to support and assist our execution of maintenance service agreements for an additional forty-eight (48) cogeneration units sold to customers by Aegis.
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TECOGEN INC.
Notes to Condensed Consolidated Financial Statements



Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations

This Management’s Discussion and Analysis of Financial Condition and Results of Operations and other parts of this Quarterly Report on Form 10-Q (“Form 10-Q”) contain forward-looking statements, within the meaning of the Private Securities Litigation Reform Act of 1995, that involve risks and uncertainties. Any statements contained herein that are not statements of historical fact may be deemed to be forward-looking statements. Forward-looking statements provide current expectations of future events based on certain assumptions and include any statement that does not directly relate to any historical or current fact. For example, statements in this Form 10-Q regarding the potential future impact of the COVID-19 pandemic on our business and results of operations are forward-looking statements. Forward-looking statements can also be identified by words such as “future,” “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “predicts,” “will,” “would,” “could,” “can,” “may,” and similar terms. Forward-looking statements are not guarantees of future performance and our actual results may differ significantly from the results discussed in the forward-looking statements. Such forward-looking statements include, among other things, statements regarding the impact of the coronavirus pandemic on demand for our products and services, the availability of incentives, rebates, and tax benefits relating to our products, changes in the regulatory environment relating to our products, competing technological developments, and the availability of financing to fund our operations and growth. Factors that might cause such differences include, but are not limited to, those discussed in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 20222023 (“20222023 Form 10-K”), as supplemented, and Part II, Item 1A of this Form 10-Q, in each case under the heading “Risk Factors.” The following discussion should be read in conjunction with the 20222023 Form 10-K filed with the Securities and Exchange Commission (“SEC”) and the condensed consolidated financial statements and accompanying notes included in Part I, Item 1 of this Form 10-Q. Each of the terms “Tecogen,” “we,” “our,” and “us” as used herein refer collectively to Tecogen Inc. and our wholly owned subsidiaries, unless otherwise stated. While we may elect to update forward-looking statements in the future, we specifically disclaim any obligation to do so, even if our estimates change, and you should not rely on those forward-looking statements as representing ours views as of any date subsequent to the date of the filing of this Form 10-Q.

Recent Developments

Acquisition and Assumption of Aegis Energy Services Maintenance Agreements
On March 15, 2023, we entered into an agreement ("Agreement") with Aegis Energy Services, LLC (“Aegis”) pursuant to which Aegis agreed to assign to us and we agreed to assume certain Aegis maintenance agreements, we agreed to purchase certain assets, from Aegis, and related matters (“Acquisition”). On April 1, 2023, the Acquisition closed. Under the Agreement, we agreed to acquire from Aegis and assume Aegis’Aegis' rights and obligations arising on or after April 1, 2023 under maintenance agreements pursuant to which Aegis provided maintenance services to third parties for approximately 200 cogeneration systems, and we agreed to acquire from Aegisacquired certain vehicles and inventory used by Aegis in connection with the performance of itssuch maintenance services.services, and, following closing hired eight (8) Aegis employees to provide services with respect to such maintenance agreements. At closing, we acquired eight (8) Aegis vehicles for consideration consisting of $170,000 in cash. Also, we issued credits against outstanding accounts receivable due from Aegis in the amount of $300,000 for the acquisition of inventory that Aegis used to provide maintenance services. At closing, we hired eight (8)
On February 1, 2024, Tecogen and Aegis employees who, followingamended the closing, have agreedAgreement to continueadd eighteen (18) additional maintenance service agreements (the "Amendment"). The Amendment includes an undertaking by Aegis to provideuse commercially reasonable efforts to support and assist our execution of maintenance services relatingservice agreements for an additional thirty-six (36) cogeneration units sold to customers by Aegis. See Note 7. Aegis Contract and Related Asset Acquisitions of the Notes to the cogeneration systems coveredConsolidated Financial Statements.    
On May 1, 2024, Tecogen and Aegis amended the Agreement to add thirty-one (31) additional maintenance contracts (the "Amendment"). The Amendment includes an undertaking by theAegis to use commercially reasonable efforts to support and assist our execution of maintenance agreements assumed pursuant to the Agreement. Following the closing and for a period of up to seven (7) years, we agreed to pay Aegis a percentage of the revenue collected for maintenance services provided pursuant to the maintenance agreements acquired from Aegis. Further, prior to December 31, 2023, we have the right to acquire and assume additional Aegis’ maintenanceservice agreements for an additional forty-eight (48) cogeneration systems on substantially similar terms and conditions. As of September 30, 2023, we have not acquired or assumed any additional maintenance agreements fromunits sold to customers by Aegis. The Agreement contained certain indemnification provisions and agreements on the part of Aegis and for each party to cooperate with each other and provide certain transitional assistance. We acquired the Aegis maintenance agreements to expand our Service portfolio and to benefit from the long-term contract revenue stream generated by these agreements.

Tecochill Hybrid-Drive Air-Cooled Chiller Development
During the third quarter of 2021 we began development of the Tecochill Hybrid-Drive Air-Cooled Chiller. We recognized that there were many applications where the customer wanted an easy to install roof top chiller. Using the inverter design from our InVerde e+ cogeneration module, the system can simultaneously take two inputs, one from the grid or a renewable energy source and one from our natural gas engine. This allows a customer to seek the optimum blend of operational cost savings and greenhouse gas benefits while providing added resiliency from two power sources. We introduced the Tecochill Hybrid-Drive Air-Cooled Chiller at the AHR Expo in February 2023 and are expecting to start accepting ordersreceived an order on February 8, 2024 for
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TECOGEN INC.
Management's Discussion and Analysis
the product three hybrid-drive air-cooled chillers for a utility in the fourth quarter 2023.Florida. A patent application based on this concept has been filed with the US Patent and Trademark Office.
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TECOGEN INC.
Controlled Environment Agriculture
On July 20, 2022, we announced our intention to increase our focus on opportunities relating tofor low carbon Controlled Environment Agriculture (CEA)("CEA"). Tecogen believesWe believe that CEA offers an exciting opportunity to apply the company’sour expertise in clean cooling, power generation, and greenhouse gas (GHG) reduction to address critical issues affecting food and energy security. In recent yearsWe propose to address this challenge by developing a highly efficient energy solution for CEA grown produce using our chillercogeneration products in conjunction with solar energy generation, energy storage, and cogeneration equipment have been used in numerous cannabis cultivation facilities because our systems significantly reduce operating costs, reduce the facility GHG footprint and offer resiliency to grid outages.other technologies.
CEA facilities enable multiple crop cycles (15 to 20 cycles) in one year compared to one or two crop cycles in conventional farming. In addition, growing produce close to the point of sale reduces food spoilage during transportation. Food crops grown in greenhouses typically have lower yields per square foot than in CEA facilities, and the push to situate facilities close to consumers in cities requires minimizing land area and maximizing yield per square foot. Yields are increased in CEA facilities by supplementing or replacing natural light with grow lights in a climate-controlled environment - which requires significant energy use.
In recent years our cogeneration equipment has been used in numerous cannabis cultivation facilities because our systems reduce the facility's need for power, significantly reduce operating costs and the facility GHG footprint, and offer resiliency to grid outages. Our experience providing clean energy solutions to cannabis cultivation facilities has given us significant insight into requirements relating to energy-intensive indoor agriculture applications that we expect to be transferable to CEA facilities for food production. Although we have no current plans to develop CEA facilities ourselves, we are working with other companies that are providing HVAC solutions, modular chiller plants, and controls to integrate and expand our solutions for CEA. Although there can be no assurance, we expect customers using the exhaust gas CO2 from our engines to boost plant growth both in food crop and cannabis facilities.
Employee Retention CreditRelated Party Notes
On March 27, 2020, the Coronavirus Aid, Relief,October 9, 2023, we entered into note subscription agreements with each of John N. Hatsopoulos, a director and Economic Security Act (“CARES Act”) was signed into law providing numerous tax provisionsprincipal shareholder of registrant, and other stimulus measures, includingEarl R. Lewis, III, a director of registrant, pursuant to which Mr. Hatsopoulos agreed to provide financing to us of up to $1 million, and Mr. Lewis agreed to provide financing to us of $500,000, and potentially, an employee retention credit (“ERC”), which isadditional $500,000 at his discretion. On October 10, 2023, we issued a refundable tax credit against certain employment taxes.promissory note and borrowed $500,000 from Mr. Hatsopoulos. The Taxpayer Certainty and Disaster Tax Relief Act of 2020 and the American Rescue Plan Act of 2021 extended and expanded the availabilityloan bears interest at 5.12% per annum. See Note 11. Related Party Notes of the ERC.
As a result of our election to use an alternative quarter, we qualified for the ERC in the first, second and third quarters of 2021 because our gross receipts decreased by more than 20% from the first, second and third quarters of 2019. As a result of averaging 100 or fewer full-time employees in 2019, all wages paid to employees in the first, second and third quarters of 2021, excluding the wages appliedNotes to the Paycheck Protection Program Second Draw Loan, were eligible for the ERC.
During the three months ended June 30, 2021, we recorded an ERC benefit for the first and second quarters of 2021 of $713,269 and, in the three months ended September 30, 2021 we recorded an ERC benefit for the third quarter of 2021 of $562,752, respectively, in other income (expense), net in the our condensed consolidated statements of operations. On April 14, 2022, we received $564,027 from the Internal Revenue Service representing the ERC claim for the third quarter of 2021 and $1,275 of accrued interest. We received $667,121 from the Internal Revenue Service on January 12, 2023 representing a partial payment of the ERC claimed from the first and second quarters of 2021 and $15,775 of accrued interest, which is reported in other income (expense) in our condensed consolidated statements of operations for the nine months ended September 30, 2023. A current receivable in the amount of $46,148 is included in our condensed consolidated balance sheet as of September 30, 2023.Consolidated Financial Statements.    
Impact of the Russian Invasion of Ukraine and Recent Events in the Middle EastGeopolitical Tensions
Presently, weWe have no operations or customers in Russia, the Ukraine or in the Middle East. The higher energy prices for natural gas as a result of the invasion of Ukraine and the conflict in the Middle Eastwar may affect the performance of our Energy Production segment.Segment and the cost differential between grid generated energy and natural gas sourced energy using our cogeneration equipment. However, we have also seen higher electricity prices as much of the electricity production in the United States is generated from fossil fuels. If the electricity prices continue to rise, the economic savings generated by our products are likely to increase. In addition to the direct result of changes in natural gas and electricity prices, the war in Ukraine and the conflict in the Middle East may result in higher cybersecurity risks, increased or ongoing supply chain challenges, and volatility related to the trading prices of commodities.
Overview

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TECOGEN INC.
Management's Discussion and Analysis
Tecogen designs, manufactures, markets, and sells industrial and commercialmaintains high efficiency, ultra-clean cogeneration systems that produce combinations of electricity, hot water and air conditioning using automotive engines that have been adapted to run onproducts. These include natural gas. Cogeneration systems are efficient because, in addition to supplying mechanical energy to power electric generators or compressors – displacing utility supplied electricity – they provide an opportunity for the facility to incorporate the engine’s waste heat into onsite processes, such as space and potable water heating. We produce standardized, modular, small-scale products, with a limited number of product configurations that are adaptable to multiple applications. We refer to thesegas engine driven combined heat and power (CHP) systems, chillers and heat pumps for multi-family residential, commercial, recreational and industrial use. We are known for products that provide customers with substantial energy savings, resiliency from utility power outages and for significantly reducing a customer’s carbon footprint. Our products are sold with our patented Ultera® technology which nearly eliminates all criteria pollutants such as CHP (electricity plus heat)NOx and Engine driven chillers (cooling plus heat)CO. Our systems are greater than 88% efficient compared to typical electrical grid efficiencies of 40% to 50%. As a result, our greenhouse gas (GHG) emissions per KwH are typically half that of the electrical grid. Our systems generate electricity and hot water or in the case of our Tecochill product, both chilled water and hot water. These result in savings of energy related costs of up to 60% for our customers. Our products are expected to run on Renewable Natural Gas (RNG) as it is introduced into the US gas pipeline infrastructure.

Our products are sold directly to end-users by our in-house marketingsales team and by established sales agents and representatives. We have agreements in place with distributors and sales representatives. Our existing customers include hospitals and nursing homes, colleges and universities, health clubs and spas, hotels and motels, office and retail buildings, food and beverage processors, multi-unit residential buildings, laundries, ice rinks, swimming pools, factories, municipal buildings, military installations and indoor growing facilities. WeTo date we have an installed baseshipped over 3,200 units, some of more than 3,000 units. Our products have long useful lives with proper maintenance. Some of our unitswhich have been operating for overalmost 35 years.

With the acquisition of American DG Energy Inc. ("ADGE") in May 2017, we added an additional source of revenue. Through ADGE, we install, own, operate and maintain complete distributed generation electricity systems, or DG systems or energy systems, and other complementary systems at customer sites, and sell electricity, hot water, heat and cooling energy under long-term contracts at prices guaranteed to the customer to be below conventional utility rates. Each month we obtain
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TECOGEN INC.
readings from our energy meters to determine the amount of energy produced for each customer. We use a contractually defined formula to multiply these readings by the appropriate published price of energy (electricity, natural gas or oil) from each customer's local energy utility, to derive the value of our monthly energy sale, which includes a negotiated discount. Our revenues per customer on a monthly basis vary based on the amount of energy produced by our energy systems and the published price of energy (electricity, natural gas or oil) from our customer's local energy utility that month.

Our operations are comprised of three business segments. Our Products segment designs, manufactures and sells industrial and commercial cogeneration systems. Our Services segment provides operation and maintenanceO&M services for our products under long term service contracts. Our Energy Production segment installs, operates and maintains distributed generation electricity systems that we own and sells energy generated by such systems in the form of electricity, heat, hot water and cooling to our customers under long-term sales agreements.


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TECOGEN INC.
Management's Discussion and Analysis
Results of Operations

ThirdFirst Quarter of 20232024 Compared to ThirdFirst Quarter of 20222023

The following table sets forth for the periods indicated, the percentage of net sales represented by certain items reflected in our condensed consolidated statements of operations:

Three Months Ended
September 30, 2023September 30, 2022
Three Months EndedThree Months Ended
March 31, 2024March 31, 2024March 31, 2023
RevenuesRevenues100.0%100.0%Revenues100.0 %100.0%
Cost of salesCost of sales58.9%56.3%Cost of sales58.4 %61.1%
Gross profitGross profit41.1%43.7%Gross profit41.6 %38.9%
Operating expensesOperating expenses
General and administrativeGeneral and administrative38.1%35.4%
General and administrative
General and administrative46.0 %51.9%
SellingSelling6.0%8.6%Selling8.6 %9.7%
Research and developmentResearch and development2.3%3.1%Research and development4.1 %4.3%
Gain on disposition of assets— %(0.1)%
Total operating expenses
Total operating expenses
Total operating expensesTotal operating expenses46.3%47.0%58.6 %65.8%
Loss from operationsLoss from operations(5.2)%(3.2)%Loss from operations(17.0)%(26.9)%
Total other income (expense), net(1.1)%(0.1)%
Total other expense, netTotal other expense, net(0.3)%— %
Loss before income taxesLoss before income taxes(17.2)%(26.9)%
Provision for state income taxesProvision for state income taxes0.4 %0.4 %
Consolidated net lossConsolidated net loss(6.3)%(3.5)%Consolidated net loss(17.6)%(27.4)%
Income attributable to the non-controlling interestIncome attributable to the non-controlling interest(0.5)%(0.4)%Income attributable to the non-controlling interest(0.3)%(0.3)%
Net loss attributable to Tecogen, Inc.Net loss attributable to Tecogen, Inc.(6.8)%(3.9)%Net loss attributable to Tecogen, Inc.(17.9)%(27.7)%

Revenues

The following table presents revenue for the periods indicated, by segment and the change from the prior year:

Three Months Ended
September 30, 2023September 30, 2022Increase (Decrease) $Increase (Decrease) %
REVENUES:
Three Months Ended
March 31, 2024
March 31, 2024
March 31, 2024March 31, 2023Increase (Decrease) $Increase (Decrease) %
REVENUE:
ProductsProducts
Products
Products
Cogeneration
Cogeneration
CogenerationCogeneration$898,692 $1,547,761 $(649,069)(41.9)%$774,229 $$543,693 $$230,53642.4 %
ChillerChiller1,935,165 1,642,478 292,68717.8 %Chiller657,061 1,068,934 1,068,934 (411,873)(411,873)(38.5)%
Engineered accessoriesEngineered accessories104,932 16,493 88,439536.2 %Engineered accessories60,108 97,509 97,509 (37,401)(37,401)(38.4)%
Total products2,938,789 3,206,732 (267,943)(8.4)%
Total product revenuesTotal product revenues1,491,398 1,710,136 (218,738)(12.8)%
ServicesServices3,842,600 3,078,604 763,99624.8 %Services4,014,310 3,136,173 3,136,173 878,137878,13728.0 %
Energy Production331,141 332,774 (1,633)(0.5)%
Energy productionEnergy production680,389 533,509 146,88027.5 %
Total revenuesTotal revenues$7,112,530 $6,618,110 $494,4207.5 %Total revenues$6,186,097 $$5,379,818 $$806,27915.0 %

    Total revenues for the three months ended September 30, 2023March 31, 2024 were $7,112,530$6,186,097 compared to $6,618,110$5,379,818 for the same period in 2022,2023, an increase of $494,420$806,279 or 7.5%15.0% year over year.

    Products


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TECOGEN INC.
Management's Discussion and Analysis
Products
    Products revenues in the three months ended September 30, 2023March 31, 2024 were $2,938,789$1,491,398 compared to $3,206,732$1,710,136 for the same period in 2022,2023, a decrease of $267,943,$218,738, or 8.4%12.8%. The decrease in Products revenue during the three months ended September 30, 2023March 31, 2024 is due to a $649,069, or 41.9% decrease in cogeneration sales, offset partially by an increase in chiller sales of $292,687, or 17.8%$411,873 and ana decrease in engineered accessory sales of $37,401, offset partially by a $230,536 increase in sales of engineered accessories of $88,439, or 536.2%.cogeneration sales. Our Products sales mix, as well as Productsproduct revenue, can vary significantly from period to period as our products are high dollar, low volume sales.

Services

    Service revenues in the three months ended September 30, 2023March 31, 2024 were $3,842,600,$4,014,310, compared to $3,078,604$3,136,173 for the same period in 2022,2023, an increase of $763,996,$878,137, or 24.8%28.0%. The increase in revenue during the three months ended September 30, 2023March 31, 2024 is due primarily to the addition of $602,724$758,252 in revenue from the acquired Aegis maintenance contracts and a $161,272, or 5.2%,$119,885 increase in service contract revenues from existing contracts.

Our service operation revenues grow with the sale of installed systems, since the majority of our product sales are accompanied by a service contract or time and materials agreements. As a result, our “fleet” of units being serviced by our service department grows with product sales.
    Energy Production

    Energy Production revenues in the three months ended September 30, 2023March 31, 2024 were $331,141,$680,389, compared to $332,774$533,509 for the same period in 2022, a decrease2023, an increase of $1,633,$146,880, or 0.5%27.5%. The decreaseincrease in energy productionEnergy Production revenue is a consequence ofdue to increased run hours at certain energy production sites that have permanently closed and seasonality.

sites.
Cost of Sales

    Cost of sales in the three months ended September 30, 2023March 31, 2024 was $4,186,509$3,610,440 compared to $3,724,776$3,287,909 for the same period in 2022,2023, an increase of $461,733,$322,531, or 12.4%9.8%. The increase in cost of sales is due to increased Services revenueservice contract maintenance costs due to higher labor and the impact of inflation on material costs, and increased energy production costs. During the three months ended September 30, 2023March 31, 2024 our gross margin decreasedincreased to 41.1%41.6% compared to 43.7%38.9% for the same period in 2022,2023, a 2.6%2.7% percentage point decrease.

increase due to higher service contract revenue.
    Products

Cost of sales for Products in the three months ended September 30, 2023March 31, 2024 was $1,669,747$1,049,543 compared to $2,074,243$1,212,568 for the same period in 2022,2023, a decrease of $404,496,$163,025, or 19.5%13.4% due to decreased product revenue volume.sales of Products, offset partially by higher material costs. During the three months ended September 30, 2023,March 31, 2024, our Products gross margin was 43.2%29.6% compared to 35.3%29.1% for the same period in 2022, an 7.9%2023, a 0.5% percentage point increase. The increase due toin margin is primarily a function of price increases instituted in 2023.

Services

Cost of sales for Services in the three months ended September 30, 2023March 31, 2024 was $2,346,384$2,092,257 compared to $1,482,355$1,737,602 for the same period in 2022,2023, an increase of $864,029,$354,655, or 58.3%20.4%, due primarily to increased labor and material costs as a consequence of acquiring the Aegis customer maintenance contracts and increased material usage at existing sites.acquisition. During the three months ended September 30, 2023,March 31, 2024, our Services gross margin decreasedincreased to 38.9%47.9% compared to 51.8% for44.6% in the same period in 2022,2023, a 12.9%3.3% percentage point decreaseincrease. The increase in margin is primarily due to increased labor and materiallower costs incurred to replace engines at certain sites.

sites in 2024.
    Energy Production     

    Cost of sales for Energy Production in the three months ended September 30, 2023March 31, 2024 was $170,378$468,640 compared to $168,178$337,739 for the same period in 2022, a decrease2023, an increase of $2,200,$130,901, or 1.3%38.8%. During the three months ended September 30, 2023March 31, 2024 our Energy Production gross margin was 48.6%decreased to 31.1% compared to 49.5%36.7% for the same period in 2022,2023, a 0.9%5.6% percentage point decrease.

Operating Expenses

    Operating expenses The decrease in the energy production gross margin is due to increased $186,685, or 6.0%, to $3,294,315gas and maintenance costs at certain of our Energy Production sites in the three months ended September 30, 2023March 31, 2024 compared to $3,107,630the same period in 2023.
Operating Expenses
Operating expenses increased $83,887, or 2.4%, to $3,625,542 in the three months ended March 31, 2024 compared to $3,541,655 in the same period in 2022. The total operating expenses were higher primarily due to additional costs resulting from the acquisition of Aegis contracts and related assets.2023.
2523


TECOGEN INC.
Management's Discussion and Analysis
Three Months Ended
Three Months Ended
Operating Expenses
Operating Expenses
Operating ExpensesOperating ExpensesSeptember 30, 2023September 30, 2022Increase (Decrease) $Increase (Decrease) %March 31, 2024March 31, 2023Increase (Decrease) $Increase (Decrease) %
General and administrativeGeneral and administrative$2,708,817 $2,343,449 $365,368 15.6 %General and administrative$2,848,568 $$2,792,483 $$56,085 2.0 2.0 %
SellingSelling425,465 567,529 (142,064)(25.0)%Selling529,669 520,070 520,070 9,599 9,599 1.8 1.8 %
Research and developmentResearch and development160,033 202,138 (42,105)(20.8)%Research and development254,696 229,102 229,102 25,594 25,594 11.2 11.2 %
Gain on disposition of assetsGain on disposition of assets— $(5,486)5,486 (100.0)%Gain on disposition of assets(7,391)— — (7,391)(7,391)100.0 100.0 %
TotalTotal$3,294,315 $3,107,630 $186,685 6.0 %
Total
Total$3,625,542 $3,541,655 $83,887 2.4 %

    General and administrative expenses consist of executive staff, accounting and legal expenses, office space, general insurance and other administrative expenses. General and administrative expenses for the three months ended September 30, 2023March 31, 2024 were $2,708,817$2,848,568 compared to $2,343,449$2,792,483 for the same period in 2022,2023, an increase of $365,368$56,085 or 15.6%2.0%, due primarily to a $229,955$111,827 increase in bad debt expense,facility costs, due to the settlement achieved in 2022 withtransition to our new facility, offset partially by a former customer, a $58,963 increase in depreciation and amortization expense, a $50,101 increase$67,271 reduction in travel expenses and a $20,272 increase in business insurance costs.

expenses.
    Selling expenses consist of sales staff, commissions, marketing, travel and other selling related expenses. Selling expenses for the three months ended September 30, 2023March 31, 2024 were $425,465$529,669 compared to $567,529$520,070 for the same period in 2022, a decrease of $142,064 or 25.0%, due primarily to a $120,788 decrease in sales commissions and an $19,341 decrease in payroll costs.

    Research and development expenses consist of engineering and technical staff, materials, outside consulting and other related expenses. Research and development expenses for the three months ended September 30, 2023, were $160,033 compared to $202,138 for the same period in 2022, a decrease of $42,105 or 20.8%.

Loss from Operations

    Loss from operations for the three months ended September 30, 2023 was $368,294 compared to a loss of $214,296 for the same period in 2022, an increase of $153,998. The increase is due primarily to increased Service material costs.

Other Income (Expense), net

    Other expense, net for the three months ended September 30, 2023 was $78,933 compared to other expense, net of $9,420 for the same period in 2022, an increase of $69,513. The increase in other expense is due primarily to the unrealized loss on marketable securities recognized in the three months ended September 30, 2023.

Provision for State Income Taxes

    The provision for state income taxes for the three months ended September 30, 2023 and 2022 was $0 and $5,922, respectively and represents estimated income tax payments, net of refunds, to various states.

Non-controlling Interest

    Income attributable to the non-controlling interest was $34,346 for the three months ended September 30, 2023 which represents the non-controlling interest portion of American DG Energy's 51% owned subsidiary, American DG New York, LLC. For the same period in 2022, income attributable to the non-controlling interest was $27,074. The increase in income attributable to the non-controlling interest is due to increased revenue and lower costs at the energy production sites.

Net Loss Attributable to Tecogen Inc

    The net loss attributable to Tecogen for the three months ended September 30, 2023 was $481,573 compared to a net loss of $256,712 for the same period in 2022, an increase of $224,861,$9,599 or 87.6%. The increase in the net loss is due primarily to increased operating expenses and an increase in other expense in the three months ended September 30, 2023.



26

TECOGEN INC.
Management's Discussion and Analysis
Nine Months Ended September 30, 2023 compared to the Nine Months Ended September 30, 2022

    The following table sets forth for the periods indicated, the percentage of net sales represented by certain items reflected in our condensed consolidated statements of operations:

Nine Months Ended
September 30, 2023September 30, 2022
Revenues100.0%100.0%
Cost of sales59.2%57.6%
Gross profit40.8%42.4%
Operating expenses
General and administrative43.8%37.3%
Selling7.4%7.7%
Research and development3.3%2.6%
Gain on disposition of assets(0.1)%(0.2)%
Gain on termination of unfavorable contract liability— %(0.3)%
Total operating expenses54.3 %47.1 %
Loss from operations(13.5)%(4.7)%
Total other income (expense), net(0.3)%— %
Consolidated net loss(14.0)%(4.7)%
Income attributable to the non-controlling interest(0.3)%(0.3)%
Net loss attributable to Tecogen, Inc.(14.3)%(5.0)%

Revenues

The following table presents revenue for the periods indicated, by segment and the change from the prior year:
Nine Months Ended
September 30, 2023September 30, 2022Increase (Decrease) $Increase (Decrease) %
REVENUES:
Products
Cogeneration$1,869,699 $4,675,629 $(2,805,930)(60.0)%
Chiller4,692,080 4,987,937 (295,857)(5.9)%
Engineered accessories532,777 492,762 40,015 8.1 %
Total products7,094,556 10,156,328 (3,061,772)(30.1)%
Services
Maintenance services10,931,744 9,025,966 1,905,778 21.1 %
Installation services— 20,109 (20,109)(100.0)%
Total Services10,931,744 9,046,075 1,885,669 20.8 %
Energy Production1,214,806 1,268,623 (53,817)(4.2)%
Total revenues$19,241,106 $20,471,026 $(1,229,920)(6.0)%


    Total revenues for the nine months ended September 30, 2023 were $19,241,106 compared to $20,471,026 for the same period in 2022, a decrease of $1,229,920 or 6.0% year over year.


27

TECOGEN INC.
Management's Discussion and Analysis
    Products

    Products revenues in the nine months ended September 30, 2023 were $7,094,556 compared to $10,156,328 for the same period in 2022, a decrease of $3,061,772, or 30.1%. The decrease in Products revenue during the nine months ended September 30, 2023 is1.8%, due to a decrease$90,090 increase in cogeneration sales of $2,805,930, or 60.0%, and a decrease in chiller sales of $295,857, or 5.9%,commission, offset partially by a $40,015, or 8.1%, increase in sales of engineered accessories. Our Products sales mix, as well as Products revenue, can vary significantly from period to period as our products are high dollar, low volume sales.

    Services

    Services revenues in the nine months ended September 30, 2023 were $10,931,744, compared to $9,046,075 for the same period in 2022, an increase of $1,885,669, or 20.8%. The increase in revenue during the nine months ended September 30, 2023 is due primarily to the addition of $1,225,497 in revenue from the acquired Aegis maintenance contracts and a $660,172 or 7.3%, increase in service contract revenues from existing contracts.

    Energy Production

    Energy Production revenues in the nine months ended September 30, 2023 were $1,214,806, compared to $1,268,623 for the same period in 2022, a decrease of $53,817, or 4.2%. The decrease in Energy Production revenue is a consequence of certain Energy Production sites that were down for maintenance and system upgrades in 2023 and seasonality.

Cost of Sales

    Cost of sales in the nine months ended September 30, 2023 was $11,388,750 compared to $11,783,455 for the same period in 2022, a decrease of $394,705, or 3.3%. The decrease in cost of sales is due to decreased Products revenue volume, offset partially by increased labor and material costs as a consequence of acquiring the Aegis customer maintenance contracts and increased material usage at existing Service sites. During the nine months ended September 30, 2023 our gross margin decreased to 40.8% compared to 42.4% for the same period in 2022, a 1.6% percentage point decrease due to higher labor and material costs.

    Products

    Cost of sales for Products in the nine months ended September 30, 2023 was $4,500,771 compared to $6,734,465 for the same period in 2022, a decrease of $2,233,694, or 33.2% due to decreased Products revenue volume, offset partially by higher material costs. During the nine months ended September 30, 2023, our Products gross margin was 36.6% compared to 33.7% for the same period in 2022, an 2.9% percentage point decrease. The increase in margin is primarily a function of price increases instituted in 2023.

    Services

    Cost of sales for Services in the nine months ended September 30, 2023 was $6,159,855 compared to $4,322,693 for the same period in 2022, an increase of $1,837,162, or 42.5%, due primarily to increased labor and material costs as a consequence of acquiring the Aegis customer maintenance contracts and increased material usage at existing sites. During the nine months ended September 30, 2023, our Services gross margin decreased to 43.7% compared to 52.2% for the same period in 2022, a 8.5% percentage point decrease due to increased labor and material costs incurred to replace engines at certain sites.

    Energy Production     

    Cost of sales for Energy Production in the nine months ended September 30, 2023 was $728,124 compared to $726,297 for the same period in 2022, an increase of $1,827, or 0.3%. During the nine months ended September 30, 2023 our Energy Production gross margin was 40.1% compared to 42.7% for the same period in 2022, a 2.6% percentage point decrease. The decrease in the Energy Production gross margin is due to decreased runtime at our Energy Production sites in the nine months ended September 30, 2023 compared to the same period in 2022.

Operating Expenses
    Operating expenses increased $806,933, or 8.4%, to $10,450,643 in the nine months ended September 30, 2023 compared to $9,643,710 in the same period in 2022. The total operating expenses were higher primarily due to higher salary
28

TECOGEN INC.
Management's Discussion and Analysis
costs, increased travel expenses, higher insurance premiums and costs related to the acquisition of Aegis contracts and related assets.
Nine Months Ended
Operating ExpensesSeptember 30, 2023September 30, 2022Increase (Decrease) $Increase (Decrease) %
General and administrative$8,418,581 $7,642,183 $776,398 10.2 %
Selling1,426,321 1,572,221 (145,900)(9.3)%
Research and development625,691 537,126 88,565 16.5 %
Gain on disposition of assets(19,950)(36,445)16,495 (45.3)%
Gain on termination of unfavorable contract liability— (71,375)71,375 (100.0)%
Total$10,450,643 $9,643,710 $806,933 8.4 %

    General and administrative expenses consist of executive staff, accounting and legal expenses, office space, general insurance and other administrative expenses. General and administrative expenses for the nine months ended September 30, 2023 were $8,418,581 compared to $7,642,183 for the same period in 2022, an increase of $776,398 or 10.2%, due primarily to a $229,955 increase in bad debt expense, due to the settlement achieved in 2022 with a former customer, a $206,912 increase in travel costs, a $182,012 increase in business insurance costs, a $125,123 increase in depreciation and amortization expense and, a $109,773 increase in consulting costs, offset partially by a $80,007 decrease in stock-based compensation.
    Selling expenses consist of sales staff, commissions, marketing, travel and other selling related expenses. Selling expenses for the nine months ended September 30, 2023 were $1,426,321 compared to $1,572,221 for the same period in 2022, a decrease of $145,900 or 9.3%, due to a $211,237 decrease in sales commissions, offset partially by $62,731 increase$74,853 reduction in trade show expense.
    Research and development expenses consist of engineering and technical staff, materials, outside consulting and other related expenses. Research and development expenses for the ninethree months ended September 30, 2023March 31, 2024 were $625,691$254,696 compared to $537,126$229,102 for the same period in 2022,2023, an increase of $88,565$25,594 or 16.5%, due to increased payroll costs.11.2%.
We recognized aThe gain on termination of unfavorable contract liability of $71,375 in the nineasset dispositions for three months ended September 30, 2022 due toMarch 31, 2024 of $7,391 represents the closingexcess of certain energy production sites. There were no energy production sites closed ininsurance proceeds received over the nine months ended September 30, 2023.net book value of assets for auto claims filed during the period.

LossIncome (loss) from Operations

    Loss    Our loss from operations for the ninethree months ended September 30, 2023March 31, 2024 was $2,598,287$1,049,885 compared to a loss from operations of $950,653$1,449,746 for the same period in 2022, an increase2023, a decrease of $1,647,634.$399,861. The increase in the loss from operationsdecrease is due primarily to lower Products revenuehigher Service and Energy Production Segment revenues and increased gross profit, in the nine months ended September 30, 2023 andoffset partially by a $806,933$83,887 increase in operating expenses.

Other Income (Expense), net

    Other expense net for the ninethree months ended September 30, 2023March 31, 2024 was $63,940$15,668 compared to other expenseincome net of $900$415 for the same period in 2022,2023, a decrease of $16,083, due to a $18,255 increase in interest due to borrowings under our related party note and lease financing and a $16,577 increase in currency exchange losses, offset partially by an increase of $63,040. Other expense increased$18,749 in unrealized income on marketable securities recognized in the ninethree months ended September 30, 2023
due primarily to a $56,246 increase in unrealized losses on investment securities.

March 31, 2024.
Provision for State Income Taxes

    The provision for state income taxes for the ninethree months ended September 30,March 31, 2024 and 2023 was $22,063 and 2022 was $32,252 and $16,352,$22,638, respectively, and represents estimated income tax payments, net of refunds, to various states.

29

TECOGEN INC.
Management's Discussion and Analysis
Non-controlling Interest

    Income attributable to the non-controlling interest was $57,232$17,351 for the ninethree months ended September 30, 2023March 31, 2024 which represents the non-controlling interest portion of American DG Energy's 51% owned subsidiary, American DG New York, LLC. For the same period in 2022,2023, income attributable to the non-controlling interest was $55,616.

$18,060.
Net Income (Loss)(loss) Attributable to Tecogen Inc

Inc.
    The net loss attributable to Tecogen for the ninethree months ended September 30, 2023March 31, 2024 was $2,751,711a net loss of $1,104,967 compared to a net loss of $1,023,521$1,490,029 for the same period in 2022, an increase2023, a decrease of $1,728,190,$385,062, or 168.8%25.8%. The increasedecrease in the net loss is due primarily to lower Productsincreased revenue and gross profit from our Service and increasedEnergy Production Segments, offset partially by a $83,887 increase in operating expenses in the nine months ended September 30, 2023.expenses.


24


TECOGEN INC.

Liquidity and Capital Resources

Sources of Liquidity
During the three months ended March 31, 2024, we incurred a loss from operations of $1,049,885 compared to a net loss from operations of $1,449,746 in the same period in 2023. Cash flows from operations increased $533,082 during the three months ended March 31, 2024 compared to the same period in 2023. As of March 31, 2024, we had cash and cash equivalents of $1,510,435 compared to cash and cash equivalents of $1,351,270 as of December 31, 2023, an increase of $159,165 or 11.8%, and an accumulated deficit as of March 31, 2024, of $43,984,623. In addition to cash from operations, we have relied upon a loan in the amount of $500,000 from a related party to help fund operations. The loan becomes due on October 10, 2025. (SeeNote 11 to the Condensed Consolidated Financial Statements” and “Liquidity,” below.) In view of the foregoing, we may need to raise additional cash through one or more equity or debt financings to continue to fund our operations and expand our business. There is no assurance we will be able to raise such financing or upon terms that are acceptable to us. (See also“Note 2 to the Condensed Consolidated Financial Statements” and in our Condensed Consolidated Financial Statements for the year ended December 31, 2023, included in our 2023 Form 10-K.) If adequate financing is not available when needed, we may be required to implement cost-cutting strategies, delay production, curtail research and development efforts, or implement other measures, which may adversely affect our results of operations and financial conditions and the price of our stock.

Cash Flows

The following table presents a summary of our net cash flows from operating, investing and financing activities:

Nine Months Ended
Three Months Ended
Cash Provided by (Used in)
Cash Provided by (Used in)
Cash Provided by (Used in)Cash Provided by (Used in)September 30, 2023September 30, 2022Increase (Decrease)March 31, 2024March 31, 2023Increase (Decrease)
Operating activitiesOperating activities$(1,020,250)$(433,810)$(586,440)
Investing activitiesInvesting activities(247,558)(300,493)52,935 
Financing activitiesFinancing activities— — — 
Change in cash and cash equivalents$(1,267,808)$(734,303)$(533,505)
Cash Provided by (Used in)

Consolidated working capital at September 30, 2023March 31, 2024 was $11,467,725$8,499,647 compared to $14,344,288$9,822,546 at December 31, 2022,2023, a decrease of $2,876,563,$1,322,899, or 19.5%13.5%. Included in working capital were cash and cash equivalents of $646,161$1,510,435 at September 30, 2023,March 31, 2024, compared to $1,913,969$1,351,270 at December 31, 2022, a decrease2023, an increase of $1,267,808,$159,165, or 66.2%11.8%.

Cash Flows from Operating Activities

    Cash used inprovided by operating activities for the ninethree months ended September 30, 2023March 31, 2024 was $1,020,250$248,216 compared to $433,810$284,866 of cash used by operating activities for the same period in 2022,2023, an increase of $586,440,$533,082, or 135.2%.187.1% Our accounts receivable and unbilled revenue balances were $7,694,571$6,533,130 and $1,748,336,$1,258,532, respectively, at September 30, 2023March 31, 2024 compared to $6,714,122$6,781,484 and $1,805,330$1,258,532 at December 31, 2022, which reduced cash by $1,324,448 and increased cash by $56,994, respectively. Inventories increased $165,537 during the nine months ended September 30, 2023, due to acquiring inventory based on forecasted revenue.providing $234,095 of cash. During the three months ended March 31, 2023 we collected the majority of the outstanding Employee Retention Credit receivables, providing $667,121 of cash from operations.
Accounts payable increaseddecreased to $4,493,758$4,013,899 as of September 30, 2023March 31, 2024 from $3,261,952$4,514,415 at December 31, 2022, providing $1,140,7592023, using $500,516 in cash flow from operations. The increasedecrease in accounts payable was due to increased inventory procured in the nine months ended September 30, 2023.decreased material purchases. Deferred revenue increased to $2,462,570 as of September 30,March 31, 2023 compared to $1,647,206 as of December 31, 2022,2023, due to increased customer deposits, providing $458,512$791,181 of cash from operations. We expect accounts payable and deferred revenue to fluctuate with routine changes in operations.

Cash Flows from Investing Activities

During the ninethree months ended September 30, 2023March 31, 2024 we used $247,558 in cash from investing activities. We used $170,000 of cash to acquire certain assets as part of the Aegis acquisition, used $31,728$104,952 of cash to purchase property, plant and equipment and distributed $62,693 to the 49% non-controlling interest holders of American DG New York LLC, partially offset by the receipt of $16,863received $33,013 in proceeds from the disposition of assets.
Forassets, including insurance proceeds. During the ninethree months ended September 30, 2022March 31, 2023 there were no cash used inflows from investing activities was $300,493. During the nine months ended September 30, 2022 we used $286,820 of cash to purchase property, plant and equipment, $29,505 to acquire intangible assets, and distributed $56,823 to the non-controlling interest holders of American DG New York LLC, partially offset by receipt of $72,655 in insurance and other proceeds from the disposition of assets.

30

TECOGEN INC.
Management's Discussion and Analysis
activities.
Cash Flows from Financing Activities

During the ninethree months ended September 30, 2023 and 2022, thereMarch 31, 2024 we used $17,112 of cash in payment of finance lease principal. There were no cash flows from financing activities.activities in the three months ended March 31, 2023.

Backlog
25


TECOGEN INC.
Backlog
As of September 30,March 31, 2024, our backlog of product and installation projects, excluding service contracts, was $5,554,599, consisting of $5,122,266 of purchase orders received by us and $432,333 of projects in which the customer's internal approval process is complete, financial resources have been allocated and the customer has made a firm verbal commitment that the order is in the process of execution. As of March 31, 2023, our backlog of product and installation projects, excluding service contracts, was $7,515,922,$7,053,160 consisting of $6,515,323$5,157,056 of purchase orders received by us and $1,000,599$1,896,104 million of projects in which the customer's internal approval process is complete, financial resources have been allocated and the customer has made a firm verbal commitment that the order is in the process of execution. Backlog at the beginning of any period is not necessarily indicative of future performance. Our presentation of backlog may differ from other companies in our industry.

Liquidity

At September 30, 2023,March 31, 2024, we had cash and cash equivalents of $646,161,$1,510,435, a decreaseincrease of $1,267,808$159,165 or 66.2%11.8% from the cash and cash equivalents balance at December 31, 2022.2023. During the ninethree months ended September 30, 2023,March 31, 2024, our Products revenue wasrevenues were negatively impacted. Our Products have long sales cyclesimpacted due to customer order delays or deferrals; service delays due to customer facility closures, in some cases for extended periods and the reduced business development activity in the aftermath of COVID-19 resulted in what we believe is a temporary reduction in Products revenue.our energy production revenues due to business closures and increased remote work and learning environments.
Based on our current operating plan, we believe existing resources, including existing cash and cash flows from operations and the funds available to us under loans from certain related parties will be sufficient to meet our working capital requirements for the next twelve months. However,In order to grow our business and fund the development of our hybrid-drive air-cooled chiller and the relocation of our primary facility, we expect that our cash requirements will increase and we may need to generate sufficientraise additional cash fromcapital through a debt or equity financing to meet our need for capital to fund operations to finance the company during the periods beyond twelve months.and future growth.
On October 9, 2023, we entered into an agreement with each of John N. Hatsopoulos, a director and principal shareholder of registrant, and Earl R. Lewis, III, a director, pursuant to which Mr. Hatsopoulos agreed to provide financing to us of up to $1 million, and Mr. Lewis agreed to provide financing to us of $500,000, and potentially an additional $500,000 at his discretion. On October 10, 2023, we issued a promissory note and borrowed $500,000 from Mr. Hatsopoulos. The loannote, as amended on March 21, 2024, is due and repayable two years from the date of issuance and bears interest at 5.12% per annum andpayable in full at maturity. The loan is repayable one year fromrequired to be repaid in the dateevent of a change of control of the issuancecompany and upon the occurrence of an event of default under the related promissory note.note, including upon a failure to pay the principal and interest when due, or the commencement of voluntary or involuntary bankruptcy or insolvency proceeding. The proceeds of the loans are expected to be used for general working capital purposes.purpose.
If sufficient funds from operating activities are not availableOn March 21, 2024, John H. Hatsopoulos amended the terms of the Promissory Note dated October 10, 2023, extending the maturity date by one year, to finance our businessOctober 10, 2025, and operations, we may needagreeing to raise additional capital through debt financingaccept payment in cash or an equity offering to meet our operating and capital needs. There can be no assurance we will be able to raise such additional debt or equity financing or upon terms that are acceptable to us.Tecogen Inc. common stock.

Significant Accounting Policies and Critical Estimates

Our significant accounting policies are discussed in the Notes to our Consolidated Financial Statements in our Annual Report on Form 10-K for the year ended December 31, 2022.2023. The accounting policies and estimates that can have a significant impact upon our operating results, financial position and footnote disclosures are described in the above notes and in the Annual Report.

Significant New Accounting Standards or Updates Not Yet Effective    
    The Company's critical accounting policies have remained consistent as discussed in our Annual Report on
Form 10-K for the year ended December 31, 2022,2023, filed with the SEC on March 23, 2023.25, 2024.
    See Note 1, Description of Business and Basis of Presentation, to the Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q.
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Management's Discussion and Analysis
Seasonality

The majority of our chilling systems sold will beare operational forduring the summer. Demand for our service team is higher in the warmer months when cooling is required. Chiller units are generally shut down in the winter and started up again in the spring. The chiller "busy season' for the service team generally runs from May through the end of September. Our cogeneration sales are not generally affected by seasonality.

Off-Balance Sheet Arrangements

Currently, we do not have any material off-balance sheet arrangements, including any outstanding derivative financial instruments, off-balance sheet guarantees, interest rate swap transactions or foreign currency contracts. We do not engage in trading activities involving non-exchange traded contracts.
Item 3. Quantitative and Qualitative Disclosures About Market Risk.
Not applicable.
Item 4. Controls and Procedures.
Management’s Evaluation of Disclosure Controls and Procedures:
As of the end of the period covered by this Report, our Chief Executive Officer and Chief Financial Officer ("Certifying Officer") conducted evaluations of our disclosure controls and procedures. As defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended ("Securities Exchange Act"), the term "disclosure controls and procedures" means controls and procedures of an issuer that are designed to ensure the information required to be disclosed by the issuer in the reports that it files or submits under the Section 13(a) or 15(d) is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's ("SEC") rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by an issuer in the reports that it files or submits under Section 13(a) or 15(d) of the Securities Exchange Act is accumulated and communicated to the issuer's management, including the Certifying Officers,Officer, to allow timely decisions regarding required disclosure.
Our disclosure controls and procedures are designed to provide reasonable assurance that the control system’s objectives will be met. Our management, including our Chief Executive Officer and Chief Financial Officer, after evaluating the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Report, havehas concluded that our disclosure controls and procedures were not effective due to a material weakness with respect to a small number of individuals dealing with general controls over information technology. Management iswill continue to evaluate the above weaknesses and we are taking steps to remediate the weaknesses as resources become available.
Changes in Internal Control over Financial Reporting:
There were no changes in our internal controls over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act) during the period covered by this Report that have materially affected, or are reasonably likely to materially affect, our internal controls over financial reporting.


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TECOGEN INC.
PART II - OTHER INFORMATION
Item 1. Legal Proceedings
Except as set forth below, we are not a party to any material pending legal proceedings.    
On November 23, 2022, we were served with a suit filed against us on August 24, 2022 in the Ontario Superior Court of Justice by The Corporation of the Town of Milton, Milton Energy Generation Solutions Inc. and Milton Hydro Distribution Inc (the "Plaintiffs"("Plaintiffs"), all of whom are municipal corporations incorporated in the Province of Ontario. The plaintiffs sued for damages in the amount of CDN $1,000,000, pre-judgment and post-judgment interest, legal fees, and any further relief the court may deem, alleging breach of contract, breach of warranty, negligent misrepresentations and nuisance. Plaintiffs allege that on or about July 10, 2022, a Tecogen cogenerator installed by us at the plaintiffsplaintiffs' facility caught fire, causing damage to the cogenerator and the plaintiff's facility. We have filed a response denying liability and are being represented by Canadian counsel. For the year ended December 31, 2022, we reserved $150,000 for anticipated damages which may not be covered by our insurance and continue to maintain the reserve at September 30, 2023.March 31, 2024.
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TECOGEN INC.
Item 1A. Risk Factors    
In addition to the other information set forth in this report,risks described below, you should carefully consider the factors discussed under "Item1A - Risk Factors” and elsewhere in our Annual Report on Form 10-K for our fiscal year ended December 31, 20222023 ("20222023 Form 10-K") The risks discussed in our 20222023 Form 10-K could materially affect our business, financial condition and future results. The risks described in our 20222023 Form 10-K and below are not the only risks we face. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially and adversely affect our business, financial condition or operating results. The following material change
We incurred a net loss from operations of $1,049,885 during the three months ended March 31, 2024, compared to a net loss from operations of $1,449,746 in the same period in 2023. We have a history of incurring losses from our risk factors since filingoperations and there can be no assurance we will be able to increase our 2022 Form 10-K isrevenues, manage our expenses and cash flows, and become profitable in the future.
We incurred a net loss from operations of $1,049,885 during the three months ended March 31, 2024, compared to a net loss from operations of $1,449,746 in the three months ended March 31, 2023. Historically, we have incurred net losses from operations, including a net loss of $4,598,103 in the year ended December 31, 2023, and, as follows:
Losses or unauthorized access to or releases of confidential information, including personal information, could subject us to significant reputational, financial, legal and operational consequences.
March 31, 2024, we had an accumulated deficit of $43,984,623. Our business requires usis capital intensive and, because our products are built to useorder with customized configurations, the lead time to build and store confidential information, including personal information, with respectdeliver a unit can be significant. We may be required to purchase key components long before we can deliver a unit and receive payment. Changes in customer orders or lack of demand may also impact our customersprofitability. There can be no assurance we will be able to increase our sales and employeesachieve and also requires ussustain profitability in the future. Our cash flows from operations are insufficient to share confidential information with suppliers and other third parties. We rely on suppliers that are also exposed to ransomware and other malicious attacks that can disrupt business operations. Although we take steps to secure confidential information that is provided to or accessible by third parties working on our behalf, such measures may not always be effective and losses or unauthorized access to or releases of confidential information occur. Such incidents and other malicious attacks could materially adversely affectfund our business reputation, results of operations and, financial condition.currently, we are reliant upon financing provided by a related party to help fund our operations. (SeeNote 11 to the Condensed Consolidated Financial Statements” and “Liquidity and Capital Resources-Liquidity.”)
We have experienced malicious attacks and other attempts to gain unauthorized access to our systems, including the ransomware attack on our computer network which occurred on April 28, 2023 which required that we limit user access, remove the hard drives from two affected workstations from service and restore network files from systems backups. Our network returned to full operation on May 1, 2023. Since this incident, we have implemented changes to user access passwords, conducted a full audit of user accounts and implemented multi-factor authentication for network and workstation access. These attacks seek to compromise the confidentiality, integrity or availability of confidential information or disrupt normal business operations, and could, among other things, impair our ability to attract and retain customers for its products and services, impact our stock price, materially damage commercial relationships, and expose us to litigation or government investigations, which could result in penalties, fines or judgments against us. Globally, attacks are expected to continue accelerating in both frequency and sophistication with increasing use by actors of tools and techniques that are designed to circumvent controls, avoid detection, and remove or obfuscate forensic evidence, all of which hinders our ability to identify, investigate and recover from incidents. In addition, attacks against us and our customers can escalate during periods of severe diplomatic or armed conflict.
We have implemented systems and processes intended to secure our information technology systems and prevent unauthorized access to or loss of sensitive data, and mitigate the impact of unauthorized access, including through the use of encryption and authentication technologies and we continue to undertake regular reviews of our IT infrastructure and have investigated improved software and hardware cyber threat protection solutions. But these measures cannot provide absolute security, and losses or unauthorized access to or releases of confidential information occur and could materially adversely affect our business, reputation, results of operations and financial condition.
Item 2. Unregistered Sales of equity Securities and Use of Proceeds

None.

Item 3. Defaults in Senior Securities

None.

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TECOGEN INC.
Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information    
    None.
Securities Trading Plans of Directors and Executive Officers
During the three months ended March 31, 2024, none of the Company’s directors or officers, as defined in Section 16 of the Securities Exchange Act of 1934, adopted or terminated any contract, instruction or written plan for the purchase or sale of Company securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) or any “non-Rule 10b5-1 trading arrangement” as defined under Item 408(a) of Regulation S-K.
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TECOGEN INC.
Item 6. Exhibits
Exhibit No.Description of Exhibit
10.1
10.2
31.1*
32.1**
101.INS**XBRL Instance Document
101.SCH**XBRL Taxonomy Extension Schema
100.CAL**XBRL Taxonomy Extension Calculation Linkbase
100.DEF**XBRL Taxonomy Extension Definition Linkbase
101.LAB**XBRL Taxonomy Extension Label Linkbase
101.PRE**XBRL Taxonomy Extension Presentation Linkbase

*    Filed herewith
**    Furnished herewith
+    Compensatory plan or arrangement





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TECOGEN INC.

SIGNATURES
 
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned.
 TECOGEN INC.
 (Registrant)
 
Dated: NovemberMay 9, 20232024By:/s/ Abinand Rangesh
Abinand Rangesh
Chief Executive Officer and Chief Financial Officer
(Principal Executive Officer and Principal Financial Officer)

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