GlobINc vs POA

[Eltaib]

Hi everyone,

 I enter the measured POA irradiation for the whole year based on every 10 min measured irradiation, we got shifted 2 hour POA irradiation for the results during summer time, how to solve this, I've seen that the GlobInc values sometimes lower from the POA values input. 

[Auriane Canesse]

Does that affect your summer days only? If yes, that's the sign of a wrong DST definition
https://www.pvsyst.com/help/meteo-database/import-meteo-data/custom-meteo-files/conversion-protocol.html#summer-time-daylight-savings

Otherwise, issues can arise from a discrepancy between your real tracker angle and the one computed in the PVsyst orientation. Do you have any way of comparing your tracker angle and the PVsyst tracker angle?