Thanks Juju!
Sorry but I haven't been very precise earlier...
I'm already using Skelion but I can't find out how to create the shading area and leave it empty when using the automatic option "insert solar component" also I believe this is not an option on the trial version, right?

Many thanks

Hi Guys!
I'm a beginner user of Sketchup (Pro 2015, version 15.3.331 64 bit) and I'm trying to design a PV-system in a flat roof with several chimneys. Is there any way to create the shading area and then automatically avoid those while filling in the available surfaces?

I hope someone can help me!
Many thanks!