Solar
Solar Panel Temperature Loss Calculator
Estimate solar panel power loss and adjusted output at elevated or reduced cell temperature.
W
%/°C
Usually shown as Pmax temperature coefficient on the panel datasheet.
°C
°C
25°C is the standard reference cell temperature used at STC.
Estimated Panel Output
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Estimated panel power at the entered cell temperature.
Temperature Difference
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Power Change
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Power Change
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Rated Panel Power
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How it is calculated:
Temperature difference = cell temperature − reference temperature.
Power change (%) = temperature coefficient × temperature difference.
Adjusted panel power = rated power × [1 + (temperature coefficient ÷ 100 × temperature difference)].
A negative power temperature coefficient means panel output decreases as cell temperature rises above the reference temperature and increases when cell temperature falls below it.
This calculation estimates the temperature effect on module rated power only. Actual field output also depends on solar irradiance, shading, soiling, inverter performance and other system losses.