Ground Irradiance

Hi all,

in SAM 2022.11.21, there are new updates about output for ground Irradiance. Can I get equation refference for this output. I checked the PV Technical Refference ( www.nrel.gov/docs/fy18osti/67399.pdf ) but can't find the related equation.

nb: Following variable that I mention as ouput :
- Irradiance incident on the ground within array
- Irradiance absorbed by the ground within the array
- Array POA rear_side radiation reflected from the ground after (IAM)



Thanks !

Hello,

A description of the ground irradiance and rear irradiance calculations is available in the following document and code repository:

research-hub.nrel.gov/en/publications/viewfactor-and-raytracing-for-agripv-modeling

github.com/NREL/bifacialvf

Best regards,
Paul.