Calculator cluster

Battery storage

Size house batteries, convert amp-hours to watt-hours, estimate C-rate limits, and plan LiFePO4 or trolling-motor banks.

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  Amp-Hours (Ah) to Watt-Hours (Wh) Converter

  Convert battery amp-hours to watt-hours for 12V, 24V and 48V systems. Wh = Ah × V.

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  Battery Bank Sizer for RV/Van

  Size a 12V, 24V or 48V house battery bank from daily watt-hours, days of autonomy and LiFePO4 or lead-acid depth of discharge.

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  Battery C-Rating & Max Discharge Calculator

  Convert a battery C-rate into maximum continuous amps and watts, and see how hard a given load is on the pack.

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  Battery Charging Time Calculator

  Estimate how long a 12V, 24V or 48V battery takes to recharge from a shore charger or alternator, including 90–95% charging efficiency.

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  Battery Runtime Calculator

  Estimate how many hours a 12V, 24V or 48V battery will last under a given load. Accounts for LiFePO4 and lead-acid depth of discharge (DoD).

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  Lead-Acid to LiFePO4 Upgrade Calculator

  See how many amp-hours of LiFePO4 replace a lead-acid or AGM bank of the same usable energy, plus the weight you save.

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  Trolling Motor Battery Calculator

  Estimate trolling-motor amp draw from thrust and voltage, then see runtime from a 12V, 24V or 36V battery bank.