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 Post subject: Incorrect Weather Corrected PR!!PostPosted: Wed May 22, 2019 8:38 am

Joined: Fri Mar 22, 2019 2:06 pm
Posts: 1
Hi

We are working on a solar project of 12.64MWp, we are facing difficulty in determining the weather corrected PR.

In recent versions of PVsyst we have observed the option to include the weather corrected PR and to draw the plot of the same.
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Capture1.JPG [ 25.23 KiB | Viewed 896 times ]
The formula used for calculation of weather corrected PR is same as that of specified in PVsyst
PR (corr) = E_Grid / ( PNomPV * Σ hours ( GlobInc / GRef * (1 - muPmpp * (Tarray - TArrayAver) )

However if I manually calculate weather corrected PR by applying the desired values in above formula, I’m not getting the similar results as tabulated below. I may be wrong but any help provided for this is appreciated.
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For reference I have provided the values of Tarray & irradiation weighted temperature and the temperature coefficient of PV module is -0.40%/°C .
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Capture.JPG [ 32.51 KiB | Viewed 896 times ]
Since this weather corrected PR does not take in to consideration the actual module operating conditions or the actual irradiation weighted average, we would like to know how it will help for a Project Developer / Contractor to provide a guarantee on Corrected PR.

Appreciate the help provided.

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 Post subject: Re: Incorrect Weather Corrected PR!!PostPosted: Wed Aug 21, 2019 8:13 am

Joined: Thu Apr 26, 2018 10:22 am
Posts: 3
Hi,

I have the same problem!

Best Regards.

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 Post subject: Re: Incorrect Weather Corrected PR!!PostPosted: Thu Aug 22, 2019 7:15 pm

Joined: Tue Oct 18, 2016 3:31 am
Posts: 288
Try emailing support for faster response.

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