Montlhy PR's Averages diferent from final PR

[Fredy]

Hello

We are trying to do montlhy PR calculations, but when we do the final monthly average the value is different from the PVsyst final PR

 

Could you please help us with this issue?

Thank you for your support

Best Reggards

[adrie]

This is normal. Months with higher yield influence the annual PR more strongly. If you want to check, just calculate a weighted average values of the monthly PR (weighted by kWh).