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.

Hi, I have a question regarding this remark: I'm importing hourly POA and ambient temperature values of the site. I'd like to know if the Perez-model can be used for retro-transposition in V6.86. I've manually selected to use the Perez-Ineichen model for the project and on the simulation report it says it used Perez for Transposition and Perez, Meteonorm for Diffuse. However, it says nothing about the model used for the intermediate step of retro-transposition. Looking forward to your reply. Lennert