BMW 750hL PEM Fuel Cell APU

The compact fuel cell battery simply occupies the space otherwise taken up by the conventional lead acid batteries of the 7 Series sedan.
Power
5kW
Voltage 
42V
Efficiency
45% (system)
Volume
20L (stack) 48L (system)
Weight
22kg (stack) 45kg (system)

Applications of the fuel cell
All lighting
Air-conditioning with car stationary
Heater with car stationary

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