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Battery Bank Size Calculator

Off-grid battery bank from daily use, autonomy, and discharge depth.

Inputs

Inputs and assumptions

Kilowatt-hours per day.

Days without sun.

0.5 lead-acid, 0.8 to 0.9 lithium.

Bank voltage: 12, 24, or 48.

Amp-hours per battery.

Result

Bank amp-hours
Waiting for calculation.
Batteries (round up)
Waiting for calculation.
Nominal bank size
Waiting for calculation.
Screening tool. Verify against the NEC as adopted locally, the AHJ, and nameplate data before acting.

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Workspace

Keep the assumptions with the result.

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