Near Shading Losses

Hello,

The difference between the different models depends in part on how consistent the inputs are. We have posted some papers describing comparisons between SAM and other PV models here:

sam.nrel.gov/case-studies

I suspect there may be differences between the way shading is represented in the different models. Which shading options did you use in SAM? For example, did you specify shading loss percentages by time step, using the month-by-hour table, or the solar-azimuth-by-altitude angle table? If you used the time series option, did you enable the partial shading model? For the comparison, you should be sure to choose options in SAM that are the most similar to the options in the other models.

Best regards,
Paul.