Battery Left After the Night Calculator

Will the battery make it to sunrise?

Use the overnight load from your monitoring, or add up what runs overnight. Everything is worked out in your browser. Nothing is saved or sent anywhere.

1. Battery

Usable capacity (kWh)

Charge at sunset (%)

2. Overnight

Average overnight load (W)

Hours until solar takes over

Reserve you want to keep (%)

3. Results

How it was worked out

What this does and doesn't tell you

Inverter idle draw counts in the overnight load.
Safety: in Australia, any work on 240V AC wiring, including connecting an inverter, battery or solar system to a home's switchboard or fixed wiring, must be done by a licensed electrician.

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