Wrong inverter power and Pnom Ratio

[J. Behrschmidt]

Hello,

I face problems with the results for inverter loss over nominal inv. power, which seems to be to high.

I see the cause in the system defintion, see picture attached. I have a 36KW inverter with four inputs, but the Global inverter power is shown with 65 instead of expected 72. When I reduce to four inputs the Global inverter power is shown with 32.5. The Inverter loss over nominal inverter power is calcluated with 1%, which seems to be to high in my opinion.

When I do not use the multi-MPPT feature, the global inverter power shows the correct value with 72kW, but as result for the inverter loss over nominal inv. power I get 11%. I did the calculation with V6.63 and V6.64 its always the same.

[André Mermoud]

I have tried your configuration and everything is OK (Global Inverter's power = 72 kW, and PNom ratio = 1.22).

Now I observe on your picture that your inverter is not from the PVsyst database (grey background). Please check its parameters (namely the PNom AC value).

[J. Behrschmidt]

Hello André,

in my opinion the values are correct. I attached the .ond. Maybe you see what's wrong.

Huawei_Sun2000_36k-8p2-haller.zip