Bosch is planning the market launch of the fuel cell stack for 2022.

The current stack version is an assembly of 400 cells each generating 1.2 volts. The entire stack thus generates roughly 500 volts. The efficiency of a fuel-cell system is some 10 to 15 percent higher than a combustion engine. Mean efficiency is roughly 50 percent. One kilogram of hydrogen contains as much energy as 3.3 liters of diesel.

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