Hung MAI

Hello PVsyst team, In PVsyst version 8.0.4, I was able to run this simulation where there are 5 different orientations (hence 5 sub-array in Systems), in which one orientation only include 1 big array of 26x19 modules. But since version 8.0.5, I have this error when opening the above variant. I tried to manually defined the pitch & Number of Sheds in the bifacial model, pitch 26m and different sheds number 1/2/500, but the errors is still there. I don't know how to solve this issue, maybe it is a bug since ver 8.0.4 can run it (although I understand the Diffuse Ground Factor will be 0 since the pitch is recognized as 0 by PVsyst in the bifacial model window, meaning it is less accurate?). But then the new function of defining the pitch&shed should have worked to correct this? Also in the 3D scene & Orientation windows, there is no error or warning at all. Can you help me with this? Thanks a lot!

Hello PVsyst! I have a vertical bifacial East-West system, and I want to make sure that the irradiance received from the East-side should be the same whether I use east-front facing or west-front facing config. Same for West-side. Therefore, I made 2 simulations with the above 2 config, then compare just the Ressource losses (top part of the Loss Diagram). The results are attached as images. I don't think the horizon loss and soiling loss is integrated in the backside losses, hence I excluded these 2 losses from the front-side. The structure shading loss BackShd is also excluded for the back-side, in hope of a fair comparison. For the result, I expect the "Global Irradiance on front side (no soiling, no horizon shading)" of one configuration (East/West) to be more or less similar with the "Global Irradiance on rear side (no soiling, no structure shading)" of the other config (West/East). I highlight the 2 couples values in green and orange. West front-facing result: East front-facing result: Only the green pair seems to be similar (1.1% difference), the orange pair is 4.5% difference. This is already much better than some previous version of PVsyst, but I still want to know if my expectation is logical and if yes, what are the reason for this difference (the orange pair). Thank you!