Energy return on investment

EROI stands for "energy return on investment", but this has nothing to do with money. It's simply a way to ask "do you get back more energy than you had to use?"

Definition: EROI = energy_returned / energy_invested

EROI is an essential factor in determining whether an energy source is viable or not.

EROI also matters for energy storage.

Tables

Energy sources

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Energy storage types

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