sarika Posted August 29, 2016 Share Posted August 29, 2016 Hello,I am working on a PVsyst simulation for a on grid PV plant. I have noticed differences across values for the IAM factor global for different versions of PVsyst.In version 6.4.1, its positive, +2% (a gain). In version 6.4.7, its negative, -2.4% (loss). Cumulatively its an effect of >4%.All the details of the project are the same. The IAM profile is provided by the manufacturer which is the same in both versions.Can you explain me what factors are responsible for such a difference?Which verison is more reliable?Thanks a lot,Sarika Link to comment Share on other sites More sharing options...
André Mermoud Posted August 31, 2016 Share Posted August 31, 2016 There was indeed an error when reading the IAM parameters (when defined as a profile) in the version 6.41. This has been corrected in the next versions (since 6.42). Link to comment Share on other sites More sharing options...
sarika Posted September 1, 2016 Author Share Posted September 1, 2016 Dear André Mermoud,Thanks for the reply.Does that mean that we can consider the ASHRAE value for the calculation then? There is no error with that?We can't update to the new version right now.Regards,Sarika Link to comment Share on other sites More sharing options...
André Mermoud Posted September 2, 2016 Share Posted September 2, 2016 No, there was no problem with the ASHRAE standard. Link to comment Share on other sites More sharing options...
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