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Solar Battery Calculator

Size a battery bank from daily use and days of backup.

Nameplate storage is larger than the energy you will use because of depth of discharge and efficiency.

How this calculation works

Daily kWh, DoD, and bank size.

Daily use (kWh)

Days of autonomy

Usable depth of discharge (%)

Round-trip / system efficiency (%)

Battery nameplate capacity (kWh each)

Air cleaner cfm for your room.

Peak-hour demand and tank size.

Stacks to cords and face cords.