Household calculator
Battery Backup Time Calculator
Use this calculator to estimate how long a battery bank can run a selected load after discharge and inverter losses.
Household calculator
Battery Backup Time Calculator
Estimate usable battery energy and runtime for UPS, inverter and small backup setups.
Result
- Nominal energy
- 2.4 kWh
- Usable energy
- 1.02 kWh
- Estimated backup time
- 3.4 hours
- Estimated minutes
- 204 minutes
Lead-acid batteries usually need a lower usable discharge than lithium batteries if you want better battery life.
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