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What is the overall efficiency of Enapter’s electrolyser?
With the AEM electrolyser we need 4.8 kWh to produce 1 Nm³ of hydrogen. That means it takes 53.3 kWh to produce 1kg of hydrogen (compressed at 35 barg and with a purity of ~99.9%). 1 kg of hydrogen contains
January 11, 2022
With the AEM electrolyser we need 4.8 kWh to produce 1 Nm³ of hydrogen. That means it takes 53.3 kWh to produce 1kg of hydrogen (compressed at 35 barg and with a purity of ~99.9%). 1 kg of hydrogen contains 33.33 kWh/kg (lower heating value), i.e. our electrolyser already has an efficiency of 62.5%. It is important to compare apples with apples: power input, hydrogen production, pressure and purity. These are very different for different manufacturers. System efficiencies (not stack efficiencies) need to be compared.