We're just about to start soliciting quotes for the roofing on our build. We are going to have solar PV on the roof of the house and the detached garage and really like the look of the in-roof systems like GSE. However there are a couple of things we're not sure on :-   1) Who is the lead trade for the installation of the GSE system. I presume the mounting system and flashing is installed by the roofers but who would normally place the panels in. Obviously an electrician is also requir