IES-VE User Forum

When setting up PVS generator under the Renewables tab IES asks for the following:

PV module nominal efficiency
Nominal Cell temperature (NOCT) (degreeC)
Reference irradiance for NOCT (W/m2): 1000 or 800
Temperature coefficient for module efficiency (1/K)

The manufacture provides
PV module efficiency at STC (1000 W/m2): 16%
3 different temperature coefficients
Voc -0.30%/C
lsc 0.04%/C
pmax -0.40%/C
Nominal Operating Cell temperature (NOCT) 45C

Going back to IES am I correct in assuming I set the reference irradiance to 1000 allowing me to use 16% as the module efficiency and the temp coefficient is pmax -0.4%/C i.e 0.004

Thanks

Hiya

That would probably be the way I'd do it in your situation yes. It might be worth a quick check with IES Support to make sure though.

Alternatively, you could ask the PV manufacturer to work out the annual carbon savings for you using their specialist software and then either match that number in your model or post-process your results.

CP

Thank you