Plug Power, a leading provider of turnkey H₂ solutions for the global green H₂ economy, announced the historic flight of a regional airliner powered by the company’s line of ProGen fuel cells.

Led by Universal Hydrogen, the H₂ fuel cell-powered flying testbed took off at 8:30 a.m. for 15 minutes at Grant County International Airport in Washington state. Reaching an altitude of 3,500 ft MSL, the flight marked a significant milestone for both companies that partnered to make H₂-powered aviation a reality.

The 40-passenger airplane’s powertrain is built with Plug’s ProGen that have been adapted for aviation use. Plug's ProGen fuel cells support light, medium and heavy-duty electric vehicles in asset-intensive applications. They have proven to be ideal because they allow fleets to achieve greater range. Fuel cells are also free of carbon emissions, and weigh and cost less than batteries.

“Plug is proud to be a part of Universal Hydrogen’s significant day in aviation history,” Plug CEO Andy Marsh said. “We’ve long said H₂ can power applications, such as planes, while reducing toxic carbon emissions. Today, we proved it, and we’re one step closer to a more sustainable future.”

The celebrated day stems from Plug’s long-time partnership with Universal Hydrogen that expanded in 2021 to begin the development of fuel cells made for regional aircraft. The partnership is one of many strategic investments Plug has made in recent years to grow the green H₂ economy and expand its applications, including into aviation.

“Our business model resolves the chicken-and-egg problem between H₂ airplanes and H₂ infrastructure by developing both in parallel and with a uniquely low-cost approach,” said Paul Eremenko, Universal Hydrogen co-founder and CEO. “The airplanes are converted to H₂ using an aftermarket retrofit conversion kit, tackling the existing fleet rather than developing a brand-new airplane. And H₂ fueling uses modular capsules compatible with existing freight networks and airport cargo handling equipment, making every airport in the world H₂-ready.”

Conducted under an FAA Special Airworthiness Certificate, the flight was the first in a two-year flight test campaign expected to culminate in 2025 with entry into passenger service of ATR 72 regional aircraft in a 56-passenger configuration converted to run on H₂.