i couldnt agree with you guys more, all other avenues were explored ie , east and west elevations, garage roof, none of these option were viable due to extreme shading, i was a bit dubious installing these panels and tried to get the guy just to have a smaller system on the wall but the guy insisted, and he was about to carry out all the work himself untill he discovered he needed MCS certs, the guy is extremly happy with the finish. this wall is due south facing on top of a hill, this is his back garden with no neigbours peering. My sub contracted roofer installs my panels and carries out all roof work and is handy with a ladder, harness and inertia reel