Thank you, Teal and thank you for everyone for attending our call today.
This quarter had a mixture of successes and challenges. The successes are easy to rattle off. Revenue increased dramatically by over 75% versus the prior year, shipment of GenDrive units in new site dramatically increase versus the prior year. We closed HYVIA JV with Renault, targeting the light commercial market for vehicles in New York. This market is expected to be 500,000 vehicles in 2030, with over 30% of the market captured by the JV. We did have some challenges in the quarter associated with hydrogen costs. There are two major drivers, the cost the bending our relationship with their products. This had short term impact on pricing and construction costs are replaced Air Products liquid tanks. This is about two thirds of the increase in the hydrogen cost for the quarter. There also was a crisis with the availability of hydrogen due to a force majeure.
Force majeure was due to a major hydrogen plant going down for two months in the Southeast. This local disruption impacted the U.S. hydrogen network. Why I think is really important? We have Plug Power made sure our customers had hydrogen throughout this event.
Let me talk briefly about our near and midterm corrective actions. Bureaucratic changes were a onetime event and now won't be duplicated. We're also now not stranglehold by having industrial gas companies, owned equipment and any of our customers sites giving us greater flexibility in making sure we have cost effective hydrogen solutions for our customers.
Second, the force majeure for hydrogen was an unprecedented event. In July additional capacity was brought online by our partner, Linde over 30 tons per day, which will alleviate future issues just to get people feel this is an increase of over 10% of U.S. capacity. We're also increasing our own capacity in October by 3.5 tonnes in our Tennessee plant. Plug Power will have an additional 70 tonnes one line in third quarter 2022 and additional sites online in early 2023. And just to remind folks, we use about 50 tonnes of hydrogen a day at the moment. And we've already announced additional green hydrogen sites across the board in New York, Pennsylvania, Georgia and Texas. This week we broke ground in our Georgia site, and the site to New York and Texas will be the largest green hydrogen plants in the world.
Somebody asked, why did we absorb the costs of the force majeure? We believe in the near term, protecting our customers from the challenges in the market today will pay off in the near term. We want our customers to know they can count on hydrogen be available, and more importantly, can count on Plug Power meeting your needs. They will be critical in helping us fill up our new plants.
We have an exciting news coming up in the coming quarters. We're increasing our gross billing guidance in 2021 to $500 million. This means we'll be increasing our gross billings by over 50% from our 2020 numbers.
We will close our JV with SK this quarter as planned. We're working on the final details of the relationship both of us are really quite excited. And will also be closing our JV with Acciona in the Iberian Peninsula. We plan to build 30 tonnes of liquid hydrogen capacity with Acciona, makes it one of the largest liquid hydrogen producer in Europe. We're also targeting bookings of 250 to 500 megawatts of electrolyzers in 2021, with 250 megawatts shipping out of our new giga factory. We'll be making announcements in the second half for additional take off agreements for hydrogen plants.
Finally, and this is really important.
With the giga factory, we're utilizing state of the art automated equipment in our new manufacturing processes. We're playing to match our unprecedented capabilities, in sales and design of fuel cells and electrolyzers and become not only a leader in manufacturing news devices, but a global manufacturing leader. That's why we hired Dave Mindrich, who ran the Tesla giga factory in Nevada. We remain incredibly excited about the future. We'll be holding our Third Annual Plug Power Symposium on October 14.
We’re moving to a virtual event because of the recent uptick in COVID cases.
You'll be able to sign up online next week and we expect to have an in-person event in the spring once a pandemic we see to show off our facility in Rochester. I was there yesterday. It's just great.
Finally, we're operating now with four general managers for our different businesses. Keith Schmid, The New Markets. That include stationary and on-road vehicles. Keith has done a marvelous job closing up that HYVIA idea gap. And as you know, Keith has been Plug COO for seven years. Only half men running our electrolyzer business, only worked with Keith for 29 years, and ran their U.S. hydrogen business for many, many years. Jose Crespo has lead led our sales efforts for six years is now the head of our material handling business. And Sanjay Shrestha with a long career in renewable energy is running our energy business. Quarterly, I'll ask one of them to join the call. They're focused on building the business and I'm sure the analysts would like to speak with them. And this quarter I've asked Sanjay to join me as well as our CFO Paul Middleton. We're ready now to take questions.