Battery calculators for RVs and camper vans
How long will the house battery last, how long does charging take, and how much capacity do you really need? These calculators answer the typical questions about house batteries, LiFePO4, AGM and gel.
Battery runtime
Calculate how long your house battery can power a load: capacity in Ah, battery type (LiFePO4, AGM, gel), power in watts, inverter – with a transparent calculation path.
Open calculatorAh ↔ Wh converter
Convert amp-hours to watt-hours and vice versa – for 12 V, 24 V and LiFePO4 systems as well as power banks at 3.7 V. With a comparison across several voltages.
Open calculatorBattery charge time
Calculate how long your charger or DC-DC charger needs to charge the RV battery – with state of charge, charging current, efficiency and the absorption phase for lead-acid.
Open calculatorLiFePO4 battery size
Calculate the required LiFePO4 capacity in Ah from daily consumption, off-grid days, depth of discharge and reserve – with AGM comparison, weight and the next standard size.
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