Calculator
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Suggested capacity is your daily energy use (kWh) divided by the peak sun hours your location gets — roughly the kW of panels needed to generate that much on an average day.
Real design also weighs roof area and orientation, shading, panel efficiency, inverter losses, and seasonal variation, none of which are read from a map here. Use it to gauge scale, then get a site survey.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.
