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Solar System Size Calculator

Size a solar array from your usage and sun hours.

Inputs

Inputs and assumptions

Monthly usage

120% oversizes for future EV or electrification.

Peak sun hours

Soiling, wiring, inverter, and shading losses.

Panel wattage

Result

Panels needed
19.00
Roof area needed
342.00
Suggested system size
7.45 kW
This calculator is a first-pass screening tool. Verify your utility tariff, metered usage, equipment specifications, and installer quotes before making a decision.

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