Good afternoon.
I was simulating a scenario on SAM just it is described on my other question (
sam.nrel.gov/forum/forum-general/3856-time-step-of-weather-data.html?start=6). I repeated all ten days of data all over the year (this data contains GHI and POA as irradiation input) to have a complete year of data, but I found some problems.
First, when I check the checkbox "POA from pyranometer" in "Location and Resource"-->"Irradiance Data(Advanced) ", the simulation results on a scenario which consumes energy, not generating energy. But if I check the checkbox "POA from reference cell" the simulations results on a scenario which generates energy (with the Soiling and IAM problems I describe below).
Second, when I simulate I get values of Soiling and IAM that are unreal (image below). Theses values doesn't change even when I consider zero values for both.
Attachment soiling-loss-diagram.png not found
For last, if I give the software any values of shading my results are also a scenario which consumes energy. I know my POA data already contains shading and soiling losses (it is from the pyranometer on field), but still it shouldn't results on scenarios that consumes energy. It's so extreme.
I wish you, SAM team, to clarify theses points, please.
Best regards, Gabriel.
