Aviation

Aviation has to cut its CO₂ and NOₓ emissions, but the physics make it the hardest transport sector to decarbonize. Batteries are far too heavy for meaningful flight; hydrogen combustion avoids the weight problem but still burns fuel and still produces NOₓ; and sustainable aviation fuels are supply-constrained and costly. The next generation of engines needs a high power-to-weight ratio, true zero-emission operation and a realistic route through airworthiness certification across a wide range of aircraft.

EH Energy provides the fuel cell stack and power system at the heart of the hydrogen-electric powertrain, engineered to each aircraft’s power, weight and altitude targets and emitting only water. Our platform spans the aircraft range through two technology modes: low-temperature PEM (LT-PEM) for UAVs, UAM and smaller regional aircraft and high-temperature PEM (HT-PEM) in development for larger aircraft, where reduced heat rejection lowers cooling-drag penalties at scale. Because our patented stacks can be modified quickly at the cell level, stacks can be tuned to a program’s requirements and packaged with the full balance of plant. EH Energy engages as a co-development partner to aircraft OEMs and integrators.