The usable capacity of an off-grid battery bank will depend on the type of battery used.

For example, Lead acid batteries usually have depth of discharge set at 30% therefore the usable amount of power will be 30% of the total storage.

eg: 10kw battery with a 30% DOD = 3kw of usable energy.

Lithium batteries have a much higher depth of discharge which is usually around  90-96% of the total storage.

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