Sequence of calculations with POA input (retro-transposition)

[lennert_oostvogels]

Hi

I've a question regarding the calculation sequence when importing POA-data and ambient temperature, measured on site. The actual imported POA data is not used in the simulation, instead the POA irradiance is re-calculated with transposition models.

Now I want to know if the following sequence is correct when the transposition model of the project is set Perez-Ineichen.

1) POA measured --> GHI, DHI calculated via Perez retro-transposition

2) GHI, DHI calculated --> POA calculated via Perez transposition

Thanks in advance.