Dfroman Posted August 25, 2017 Share Posted August 25, 2017 (edited) Hi All,Yes I am using backtracking.I am trying to understand why there is a difference in the Near Shading: Irradiance Loss of -1.7% in v6.52 verses -9.1% in v6.63. I have examined everything from preferences and hidden preferences through the shading scene looking for any setting that could account for such a large difference in the simulated results. This is a Single Axis Tracker Grid Connected project. Do you have any insight on where to look? Thanks in advance Edited December 12, 2017 by Dfroman Link to comment Share on other sites More sharing options...
André Mermoud Posted August 25, 2017 Share Posted August 25, 2017 Are you using backtracking ? There were indeed several issues in the version 6.52, for tracking systems in some special configurations (pairs of 2 trackers, axis orientation). I should have a look on your project to identify the exact reason. But to my knowing the result of the V 6.63 should be correct. Link to comment Share on other sites More sharing options...
Dfroman Posted October 4, 2017 Author Share Posted October 4, 2017 Thank you for the reply.Yes, I am using backtracking. I have attached the PVsyst results from both V6.52 and v6.63 for your further review.Dennis Link to comment Share on other sites More sharing options...
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