When drawing the roof area, the entire roof must be selected, while when adjusting the perspective, you can create a grid with a maximum size of 50 x 50 meters. The program will automatically generate photovoltaic panels on the entire roof slope thanks to the fact that in the first step we marked the entire roof area (described example is shown in the video below).

The total length of the roof on the above building was 70 meters. Due to the perspective grid, the max. 50 meters, we had to adjust the perspective accordingly.

You can also create a visualization for half of the roof. The generated panels of the first part of the roof can be copied to the second part, thus creating panels on the entire surface that we have to use