Comparison of "Near Shadings" value in version 7 and 8

[FUJITA_ANE]

Hello,
I compared near shadings value on Loss diagram  in version 7 and 8 under the same variant.
ver7.4.8 => -0.41%
ver8.0.2 => -1.01%

The following shading diagrams(ver7/8) shows the difference during the morning and evening hours.
Is this a specification due to the update? or a bug?
Thank you.

[Michele Oliosi]

There has been a very small improvement to the way the shadings are interpolated at low sun heights and close to the “behind the plane” thresholds.
However, the change seems rather large in your case. We would gladly take a detailed look at it, if you can send us your project over at support@pvsyst.com if possible.

Thank you !

[FUJITA_ANE]

Hello Michele,

Thank you for your reply. I sent the project file to support@pvsyst.com.
Please check it and let me know if you need other information.

[c.katharotiya]

Hello,

Is there any update that what is the reason behind getting different result value in version 7 and 8?

[Michele Oliosi]

Yes. A bug was corrected in update 8.0.5, that afflicted cases where an averaged orientation had a large orientation spread. In these cases, the shading factors were pessimistic for low sun heights. Now things should work properly.

[FUJITA_ANE]

I checked that the shading factor was corrected in version 8.0.5.
Thank you for your support.