Solar Array Size Calculator
Ballpark the array size you need to make a daily energy target.
Estimate only. Sun hours, shading, tilt, and losses change the answer. Use a proper modeling tool and the design team for real projects.
Result
Fill in your numbers and hit Calculate.
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How the math works
Array kW DC = daily kWh / (peak sun hours x derate)
Panels = array kW x 1000 / panel watts, rounded up
Derate covers losses like wiring, heat, soiling, and inverter (0.75 to 0.85 is a common range)Free weekly email
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