mohsin

Hi, If I change the temperature in OND file of the inverter the production doesn't change at all. It should derate with respect to the derating temperature. In red it is written this strategy can be modified in the project area Miscellaneous Tools (inverter temperature tab). Can you please guide me where is this project area Miscellaneous Tools (inverter temperature tab).

I am using 6.81 version of PVsyst. My external transformer losses are coming very high especially resistive/inductive losses. My losses are coming out to be 1.09%not at STC which I think is high as in previous version of PVsyst we use to have a lesser value. I know it depends upon I square and current depends upon the irradiance therefore,my question is if PVsyst is considering irradiance from TYM3 weather data and changing the losses or is there a bug in the system? Thanks for your help.

I want to also add into it as well, I ma designing a 200 MW AC with bi-facial with tracking modules system project but my transformer losses are too high. External transformer losses which I am talking are (Iron loss .10%, resistive losses .90%). Are these number high? Furthermore, what else I can do to decrease transformer losses? Your help is appreciated.