Size a nominal battery bank from essential load, backup hours, voltage, depth of discharge and efficiency.
Indicative battery capacity
392 Ah
At 12 V, the nominal stored energy is about 4.71 kWh.
Battery capacity and performance vary with chemistry, age and discharge rate.
Use a qualified installer for cable, fuse and battery-bank design.
Ah = watts × hours ÷ (voltage × DoD × efficiency).
The result updates in your browser as you change an input. It is a planning estimate, so compare it with real bills, product specifications and a qualified professional's assessment.
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