Free Interactive Battery Bank Calculator

Enter your values below and click Calculate to get your battery bank size instantly:

🔋 Solar Battery Bank Sizing Calculator

Based on the standard formula: Daily Usage × Days of Autonomy ÷ Depth of Discharge

Daily Energy Usage (from your load audit)

Usage Unit

Days of Autonomy (cloudy days backup)

Battery Chemistry

System Voltage

Safety Buffer

—

Total kWh needed

—

Amp-hours at your voltage

—

Usable kWh

—