Solar battery overnight calculator
Works out what SOC% to charge your batteries to overnight on off-peak rate
Location & array
Latitude
Longitude
Array size (kW peak)
Roof tilt (°)
Roof azimuth (° — 180 = south)
Fetch tomorrow's forecast ↗
Tomorrow's solar forecast
Solar forecast (manual)
Expected solar tomorrow (kWh)
12.0 kWh
Forecast confidence
High — clear skies
Medium — partly cloudy
Low — overcast
Energy profile
Battery capacity (kWh)
Current SOC (%)
50%
Daily consumption (kWh)
20.0 kWh
Battery efficiency (%)
95%
Safety buffer (%)
10%
Calculating…
–%
target overnight charge SOC
Solar expected
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Shortfall to cover
–
Already in battery
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Need from grid (off-peak)
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