PV panels as a shading surface


I would like to know if I defined a detached surface (about 1m above rooftop) as a PV generator system by using the “generationsystem” function, do I still need to use the function “context surface” to define it as a shading device (as it is a detached surface from the rooftop)? Or once I defined it as a PV panel, it is being considered as a shading surface already.


Please help. Thanks.