André, I have sent you an e-mail with my phone number to discuss. I'll try to rephrase my question. I have a single axis tracker that I will be running two identical reports just to see if they match. One report will be using "Near shade model" (no shading objects except the tracker itself), and one will be using the standard "Orientation" (no shade model). I would have thought that the two report would match or at the vary least be close, but the production between the two have a delta of 44MW/H. So my question is why are they so different? If I do the same scenario with a fixed tilt system the MW/H do match. Any insight on this would be greatly appreciated.