Rafael Santos Posted January 22, 2016 Share Posted January 22, 2016 Hi Mermoud,I imported a TMY from an hourly-based ascii file. The file contains only global horizontal irradiance and temperature values. When I checked the quality of the data, PVsyst said it seems to be ok, although it suggested me a time shift of 13 minutes (no logycal reason for that, since my data is hourly-based). My dataset has timestamps indicating the beggining of the dataset, the same way PVsyst works (I suppose), so I guess this is not the problem here.Somehow I am getting very high values of Normal Beam Irradiance (close to 1400 W/m²) at the beginning of the days in some days of January, March, April, October and November. I attatched a print of January 24th, as an example. (GlobHor in yellow, DiffHor in red, BeamHor in black and BeamNor in blue).I am pretty sure this is the reason why I am having big shading losses, as I am using tracker, and the beginning/end of the day has most losses.Thanks for the attention, and regards,Rafael Link to comment Share on other sites More sharing options...
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