VOC and ISC calculation confirmation

Hey Paul,
I wanted to confirm a couple questions we had floating around the office. Our question is in the calculation of the sub-array VOC and ISC values with respect to loss values. If I am reading the SAM Model Reference document correct, it seems like the irradiance, temperature, and module reference values are calculated, VOC and ISC are calculated at a per module basis, and then multiplied by the number of modules in a string. The maximum power point values are calculated, power is calculated, and only after that are the DC sub array losses are applied to these power outputs. Do I have that order of operations correct?
Thanks so much,
George Hart

Hi George,

Yes, that is correct.

SAM applies the DC losses from the Losses input page to the DC output calculated by the module model, which is reported as "Subarray i]n[/i DC power gross (kW)" in the time series results.

For Years 2 and later, SAM also applies the degradation loss(es) from the DC degradation input page.

Best regards,
Paul.