Your inputs
Editable example valuesYour estimate
Live calculationTemperature-adjusted power
387 W
Change from rated power
-14 %
Planning estimates, not equipment approval. Review the assumptions below before choosing a system.
No location or tariff is detected automatically. All results use the values you enter.
What is this tool used for?
Enter cell temperature, not air temperature, and the panel's power temperature coefficient. The estimate holds sunlight constant and only models the temperature effect.
How this is calculated
P(T) = P25 × [1 + γ ÷ 100 × (Tcell − 25)]; P25 = Panel rating · W; Tcell = Cell temperature · °C; γ = Power temperature coefficient · %/°C
Before you use the result
Enter cell temperature, not air temperature, and the panel's power temperature coefficient. The estimate holds sunlight constant and only models the temperature effect.
Tool guide
Enter cell temperature, not air temperature, and the panel's power temperature coefficient. The estimate holds sunlight constant and only models the temperature effect.