jonipa Posted June 23 Share Posted June 23 Hello, I am currently analyzing a 1P trackers' PV plant. One side of the plant is configured with 6m pitch while other uses 5m pitch. As I enter the 3D scene using these two tracker separation I get the following error as PVSyst is not able to compute such scenario: In blue and yellow the two different pitch we have: Anyone some advise on how to deal in this case? Thanks a lot! Link to comment Share on other sites More sharing options...
dtarin Posted June 23 Share Posted June 23 Model these as separate variants when using bifacial modules, combine post-pvsyst. Link to comment Share on other sites More sharing options...
jonipa Posted June 27 Author Share Posted June 27 Thank you Dtarin, Tried to do so. Succeeded for 5m pitch trackers but when entering the 3D scene for 6m pitch I get the following error. Any thoughts on what could be happening? Link to comment Share on other sites More sharing options...
dtarin Posted June 27 Share Posted June 27 Under field type select horizontal N-S tracker, not the one you have selected. Link to comment Share on other sites More sharing options...
jonipa Posted June 27 Author Share Posted June 27 Also tried so but when modifying PVSyst needs to recompute the shading factor table. Then "field type" changes to "Tracking, tilted axis automatically" again. Still haven´t found a solution. Link to comment Share on other sites More sharing options...
dtarin Posted June 27 Share Posted June 27 Maybe a bug or glitch. Set it to horizontal N-S tracker in orientation menu, save the variant, close and reopen PVsyst. Link to comment Share on other sites More sharing options...
jonipa Posted June 28 Author Share Posted June 28 Had to set it to horizontal N-S tracker and just run the simulation without computing the shading table before. The shading table was computed while simulating and could get the results report. But after closing the results window the error pops up again. Link to comment Share on other sites More sharing options...
Sergio Jimenez Posted July 7 Share Posted July 7 Hi Jonipa. A possible way to issue this error is go to the near shading scene>constructions/perspective and select all the trackers, then go to Tools>List and Management off objects (Ctrl+G) and modify the Tilt column to 0, this will erase all the tilt from the trackers (it is an aproximation because real trackers will have a little tilt when it will be implanted in the terrain) but should allow you to use correctly the bifacial scene for the modules. In general if the you have multiple different tilts the bifacial parameters will show you an error if the have a average difference more than 2º (this value could be seen in the advance parameters). I hope this solution could help you! Link to comment Share on other sites More sharing options...
Michele Oliosi Posted July 7 Share Posted July 7 Hi, 22 minutes ago, Sergio Jimenez said: In general if the you have multiple different tilts the bifacial parameters will show you an error if the have a average difference more than 2º (this value could be seen in the advance parameters). Indeed. Actually you can change the limit to a higher value (main window > Settings > Advanced parameters), in your case 3° is ok. It doesn't change anything to the calculation. PVsyst computes the backside irradiance as if your trackers were horizontal anyways, so there may be a very small uncertainty on your yield. I would say that for 3° the uncertainty is negligible. Link to comment Share on other sites More sharing options...
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