I know that GCR is used to calculate some land cost etc., but I want to know how to calculate for non flat roofs, or this doesn't impact the self shading calculus?.
I have a tilted roof surface faced to southeast, about 10° of inclination. The modules are in parallel to the roof, but in the articles I just found the formulas for flat surfaces on the ground (
REFERENCE ARTICLE
).
SBR = d/h, where d is the distance between the subarrays and h i the height of the modules
GCR = 1 / (cos(beta) + (SBR + sin(beta))), beta is the tilt angle from the FLAT surface and the module
The GCR values are from 0.01 and 0.99, I used 0.99 assuming there's no inclination from the roof to the modules subarrays, and the distance d between the subarrays are minimum.