US hydrogen fuel cell developer FuelCell Energy has announced its first binding data center power deal with US developer Fit Energy USA.The deal will see FuelCell supply up to 380MW of on-site fuel cell generation, which will power data centers behind the meter. If realized, it would be one of the largest fuel cell deployments to date.The deal includes an immediate deposit for an initial 30MW of capacity, with delivery scheduled to begin later this year. The remaining capacity will be deployed in phases tied to deployment milestones."Today's announcement marks a critical step in building the power foundation required for the next generation of AI infrastructure," said Joel Leonoff, CEO of Fit Energy. "FuelCell Energy's technology aligns with our growth objectives and our goal of delivering behind-the-meter power solutions to data centers at gigawatt scale."This agreement further validates our decision to scale our operations to 500MW, preserving our ability to serve a broad and growing pipeline of customers," added Jason Few, president and CEO of FuelCell Energy.Fir Energy is an energy infrastructure developer headquartered in Boca Raton, Florida, focused on long-term ownership of generation assets for the digital economy. Outside of the reported deal, there is very little information about the project pipeline or any activity in the data center market.FuelCell Energy is a carbonite fuel cell developer. It offers three core products to the data center market, including a 1.25MW system, a 2.5MW system, and a 12.5MW system. Its newest 12.5GW model was launched in March of this year.In addition to its latest deal with Fit Energy, the company has also signed two non-binding agreements in the space. In January, it partnered with investment company Sustainable Development Capital (SDC) to explore deploying up to 450MW of fuel cell power systems to support global data center growth. Before this, it partnered with AI data center developer Inuverse to explore deploying up to 100MW of fuel cell power at a data center in Daegu, South Korea.Fuel cells are gaining popularity within the data center market, offering a lower-carbon solution for developers seeking dispatchable power.The biggest player in the sector is Bloom Energy, which has signed a number of deals to power data centers within the US market. To date, it has signed agreements with AEP Ohio, Equinix, and Oracle to power data centers through its fuel cell technology.