Sandia proposes the following model to estimate module temperature, :

•  = Solar irradiance incident on the module (POA) (W/m^2)
•  = Ambient air temperature (°C)
•  = Wind speed (m/s)

a and b are parameters that depend on the module construction and materials as well as on the mounting configuration of the module.  The table below lists representative values for these parameters for various common module types and configurations.