HOMER Pro 3.16

Electrolyzer efficiency is the efficiency with which the electrolyzer converts electricity into hydrogen. It is equal to the energy content (based on the higher heating value) of the hydrogen produced divided by the amount of electricity consumed.

Example: The higher heating value of hydrogen is 142 MJ/kg, which is equal to 39.4 kWh/kg. So an electrolyzer that consumes 50 kWh of electricity to produce one kilogram of hydrogen has an efficiency of 39.4 kWh/kg divided by 50 kWh/kg, which is 79%.