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Home ToolsRequired Battery Capacity Calculator

Required Battery Capacity Calculator

WHATSON / SOLAR & BATTERY

Required Battery Capacity Calculator

Work backwards from a backup load and duration to nominal battery capacity.

Starting values are editable examples. Enter your own loads, datasheet values and site assumptions.

1 Backup request

Steady AC load (W)Backup duration (hours)Energy allowance (%)

2 Battery and inverter

Bank nominal voltage (V)Usable depth of discharge (%)Inverter efficiency (%)DC idle consumption (W)

Required Battery Capacity results

Your calculation

Your energy worksheet starts here

Enter your load, battery and solar assumptions to see the calculation and itemised worksheet.

Planning arithmetic with explicit assumptions. Equipment limits and site design need independent review.

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