Backup planning

Estimate inverter capacity and battery size for a target backup duration

Use the connected load, expected backup hours, efficiency, and allowable battery discharge depth to estimate a practical inverter VA size and required battery capacity in amp-hours.

Inverter VA Battery Ah Backup planning

Backup Inputs

Adjust the load and battery assumptions to match your installation plan.

Connected Load (W)

Backup Hours

System Voltage

Power Factor

Inverter Efficiency (%)

Usable Battery Depth of Discharge (%)

These numbers are for planning. Final inverter and battery sizing should consider startup surge, battery chemistry, and cable losses.

Planning Breakdown

Connected load0 W

Required output VA0 VA

Energy for backup0 Wh

Recommended battery0 Ah