Solar Panel Output Calculator
Daily, monthly, and yearly energy from a set of solar panels.
W
h
%
How it works
Daily kWh = array size (kW) × peak sun hours × performance ratio. The performance ratio (usually 75–85%) bundles inverter loss, wiring loss, dust, and panel heating. Monthly values use 30.4 days. Actual output varies with weather and season. Example: with the default values, daily output comes to 16 kWh.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.