Calculate the number of solar panels needed based on daily energy usage, panel wattage, peak sun hours, and system efficiency. Helps plan residential and commercial solar installations.
Enter your values below
Average daily peak sun hours for your location
Typically 75-85% accounting for inverter losses and wiring
How this calculator works
Divides the daily energy requirement by the daily energy production per panel (watts × sun hours × system efficiency) and rounds up to the nearest whole panel.
Common questions about this calculator
