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Solar Panel Calculator

Calculate the number of solar panels needed and estimated savings based on power usage.

System Inputs

Daily energy usage

kWh/day

Peak sun hours

hours/day

System efficiency

Panel wattage

Design margin (buffer)

Results

Enter your inputs and press Calculate to see results.

About this calculator

This tool estimates the solar array size and number of panels you need based on your daily energy usage, peak sun hours, system efficiency, and panel wattage. The design margin adds a buffer for seasonal variation, shading, and other real-world losses.

Note: Results are estimates. Actual performance depends on location, orientation, shading, temperature, and equipment specifics.