Yes Mr @djordje I worked on (PV system size) component in the file you attached. But I have a problem about this component which makes me don’t want to use it. The problem is I work on a specific vertical rectangular PV surface with a 0.35 m2 area, but when I use pv system size component I found in the ( out) that the area become 0.37 m2 …why this increase in the area ?