UPS / Inverter Battery Runtime
Calculate how long a battery can power a load through a UPS or inverter, free online.
About this calculator
Usable energy = battery voltage × amp-hours × depth of discharge (DoD) × inverter efficiency. Runtime = usable Wh ÷ load W. Lead-acid batteries should only be discharged to 50%; lithium (LiFePO₄) to 80–90%.