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Adding TMY P90 files from Meteo Databases

Emanuel Rodriguez

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Some Solar Databases provide a TMY meteo data with P90 instead a value for interannual variability. 

I am not sure how to estimate the P90 production with this TMY P90 data. Could you please help me?

I was thinking to simulate with TMY P90 meteo data as usual but then in the "Energy Management" menu set 0% for "interannual variability" and get the Energy P90 marked in the image below.  This way I would be getting the uncertainties of the other sources such as PV modules, inverters, soiling and module quality loss and  long term degradation. 

Do you have any experience or opinion on this matter?

Thanks in advance.





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If it is a P90 weather file, then you are correct, do not include interannual variability or any additional uncertainty for the weather resource. You will just need to include the additional sources of uncertainty in the simulation (soiling, mismatch, etc). The P90 weather file already includes in its construction the interannual variability and the solar radiation model uncertainty.

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