gdk Posted February 4, 2020 Share Posted February 4, 2020 My runs of PVsyst indicate that, for exactly the same system design inputs, a percent decrease in GHI levels causes about the same percent decrease in energy generation.So far I have tested 5%, 10%, 11%, 12%, 15%, and 17% GHI decreases by editing my hourly GHI data in PVsyst standard format. In each case, these decreases produce a PVsyst-predicted decrease in solar plant energy generation of about 1% less than GHI was decreased (i.e. a 10% decrease in GHI results in a 9% decrease in energy generation).Is this conclusion largely accepted by the community of solar energy plant analysts?If so, and given the mathematical relationship between GHI and insolation, can I presume that the same conclusion can be stated for an insolation decrease by the same above percentages?Thank you for any insights! Link to comment Share on other sites More sharing options...
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