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High Spec Annual Yield and Performance Ratio


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Hi Carlos!

Given the UK as location, the results seem odd to me too. Also, the performance ratio is >100%, which (unsless Valentin Software defines it differently) is impossible. There for sure is something wrong with these results.

Best Regards,



Here is confirmation that the PR in PVSol can't ever be >1. 


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I only have the report in PDF. I think they may have produced a word document and altered it before converting to PDF.

I have produced my own PVSol and my PR is 85% and the Spec Annual Yield is approx 860kWh.

I will contact the company producing these documents and ask them to explain.




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