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From rated power and module dimensions, compute power density in W/m², module efficiency and panels needed per kilowatt.
Power density
225W/m²
Module efficiency
22.5%
Panel area
1.95m²
Panels per kW
2.3
Power density is rated power spread over the panel's physical area: density = power ÷ (length × width), in watts per square metre.
efficiency = density ÷ 1000 W/m² × 100. STC assumes 1000 W/m² of irradiance.1000 ÷ rated watts — handy for sizing.Estimates only — for guidance, not a quote or engineering specification. Nothing you enter is stored or sent anywhere; the maths runs entirely in your browser.
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