Hi Marc,
The cell temperature value is the temperature of the cell in degrees Celsius. You can find descriptions of SAM's different cell temperature models in the SAM Photovoltaic Reference manual:
Gilman, P.; Dobos, A.; DiOrio, N.; Freeman, J.; Janzou, S.; Ryberg, D. (2018) SAM Photovoltaic Model Technical Reference Update. 93 pp.; NREL/TP-6A20-67399. (
PDF 1.8 MB
)
See
sam.nrel.gov/photovoltaic/pv-publications.html for other references.
The temperature coefficients used for the cell temperature calculations are inputs to the module model. You can find these on the module page in SAM.
The effect of temperature is included in the "DC module deviation from STC" loss output. That value includes other losses as well -- SAM does not report the effect of temperature as a separate loss.
Best regards,
Paul.