GHI to GTI Calculations

[shubham]

Hello Everyone

Can anyone help me, how PVsyst calculate GTI & GlobInc (Global incident in coll. plane) from GHI? especially using perez method.

[Adrien Villoz]

Dear shubham,

You already answered your question: the global transposed irradiance is obtained by applying the Perez model (or Hay model if you changed it in the settings) to the hourly values of horizontal global and diffuse irradiance.