kjs55 Posted June 24, 2023 Share Posted June 24, 2023 I suggest changing the default option of "AC losses power reference" in Project Settings from "PNomPV(ac) at STC" to the more physics-correct "PNom (inverters)". Thanks. I'm running PVsyst v7.3. Link to comment Share on other sites More sharing options...
jacob Posted January 11 Share Posted January 11 Thanks for the recommendation. Do you know how to chart or plot PNom(Inv)? It is not completely clear to me if this is a static variable or if the simulation varies the power used in the ohmic calculations based on AC generation at each hour in the simulation. Do you have any insight? thanks, Link to comment Share on other sites More sharing options...
Ajay Deepak Posted February 1 Share Posted February 1 AC loss with Pnom is accurate as it is considered Inverter power for percentage loss calculation. Example case: Inverter Power is 200kW, and DC power connected to the inverter is 250kWp. AC loss at STC level = 1.5% of 250kWp which is wrong and loss values will be lesser. AC loss at Pnorm (Inverter) = 1.5% of 200kW which is correct and loss values will be slightly higher than the previous case. Regards, Ajay. Link to comment Share on other sites More sharing options...
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