Fuel cell vehicles are electric vehicles that store energy in the form of hydrogen gas, rather than in an electrochemical battery. The overall process, from the generation of renewable electricity through to its use to drive the vehicle, has an efficiency level of around 20% — a long way from the 70% figure for battery electric vehicles.
There are currently very few models of fuel cell cars on the market, and they cost in excess of €60,000. The bus market is stronger, with a significant number of European cities now adding fuel-cell vehicles to their urban and inter-city fleets. Unlike battery electric vehicles, the range and refuelling times of this type of vehicle are comparable to those of conventional vehicles.
Hydrogen is also a possible solution for rail transport, on lines where electrification is not viable, and in maritime transport.