Solar Panel Calculator Widget | Calculator Campus

Primary output —

Enter your yearly electricity use, average peak sun hours, and panel wattage to size a basic home solar array. Open Advanced for monthly bills, loss/cost assumptions, or an existing-system generation estimate.

Electricity use (required)

Installed DC system size (kW) (required)

Peak sun hours per day (required)

System losses (%) (required)

Panel wattage (W) (required)

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Consumption period (required)

Bill offset target (%) (required)

Area of one panel (m²)

Electricity rate ($/kWh)

Installed cost per watt ($/W)

Panels needed

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Required DC system size —

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Production assumptions

Panel footprint —

Optional financial screen

Rough annual energy value —

Estimated installed cost —

Simple payback period —