RV Battery Runtime Calculator

Estimate how long a battery bank may support a steady electrical load.

Battery capacity (Ah)

Battery voltage

Usable depth of discharge (%)

System efficiency (%)

Average load (W)

Real runtime varies with inverter losses, battery chemistry, temperature, load profile and battery condition.

✓

Trusted CalculationsMath built for real towing and hauling decisions.

◉

Built for the RoadFast tools designed for phone use at the truck or scale.

⌁

Two AudiencesRV/trailer tools and dedicated commercial-driver utilities.

⌂

Your Data, Your ChoiceUse locally or sync saved setups through your TowAtlas account.