I have a question regarding this remark:
In principle, in recent versions, when you have meteo data created by original POA data, PVsyst doesn't allow to use the Perez model for the next transpositions.
Using the Perez model should obviously give different results (not matching your input POA values).
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.