Ambient to cell temperature calculator

Defaults are invented: air 30 °C, 900 W/m² in the plane of the array, wind 2 m/s, a 400 W module with a -0.30 %/°C power coefficient. The model parameters are the published defaults for the Sandia, PVsyst-type and Faiman models, not values fitted to your module. The simple NOCT line uses the NOCT you enter (45 °C is invented). The power line is the rating times the temperature factor only: it does not scale for irradiance and ignores every other loss.

Design aid only. Sandia wind speed is at 10 m height; the other models need wind at the height their coefficients were fitted for. Cell temperature is a model result, not a measurement.