Solar production calculator (theoretical)
Enter the panel wattage, peak sun hours and system efficiency to get the daily kWh.
Result
A 400 W panel with 5 peak sun hours at 80% efficiency produces about 1.6 kWh/day.
Example
Estimate the theoretical daily energy production of a solar panel in your browser. Values stay on your device.
A 400 W panel with 5 peak sun hours at 80% efficiency produces about 1.6 kWh/day.
Processed locally in your browser.
Methodology
kWh/day = wattage × peakSunHours × efficiency / 1000. This is a theoretical estimate; real output depends on orientation, shading and temperature.
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