Internal Model results tool

[j.meier]

Hello,

today I was trying to rebuild the PR calculation and found this.

PR = E_Grid / (GlobInc * Pnom)

When I open our .PAN file the "Internal Model results tool" displays an Pmpp of 262.1 W for a 260 W Pnom module.

Does this mean, that if we have STC during simulation PVsyst calculates a power of 262.1 W for this module?

If that's the case wouldn't we calculate an overestimated PR if we use 260 W as Pnom instead of 262.1 W

Thanks for help.

[André Mermoud]

Yes you are right: the Pmpp calculated at STC influences the Performance Ratio.

Please see the discussion about this problem in our FAQ Why is the MPP of my module diferent than the PNom value?.