Nit pick: Electrolysis is more like 70% efficient, but once you add the losses from compression and turning that hydrogen back into electricity, your 30% figure

Nit pick: Electrolysis is more like 70% efficient, but once you add the losses from compression and turning that hydrogen back into electricity, your 30% figure sounds about right. https://en.wikipedia.org/wiki/Electrolysis_of_water#Efficiency https://en.wikipedia.org/wiki/Electrolysis_of_water#Efficien...