Fuel cell auxiliary power unit
= Fuel cell auxiliary power unit
{wiki=Fuel_cell_auxiliary_power_unit}
A Fuel Cell Auxiliary Power Unit (FCAPU) is a system that generates electricity using hydrogen and oxygen, typically for providing electrical power to vehicles, especially in applications such as commercial trucks, buses, and locomotives. The key components of a fuel cell include an anode, a cathode, and an electrolyte membrane. **Key Characteristics of FCAPUs:** 1.