I also used CT1 and found it great. Make sure you leave a gap between the panel and the roof so that there is some air circulation. Panels do get very hot. I used aluminium rods on the roof and then attached the panel to the rods. That was about 6 years ago and everything is still there and working. Just back from 10 weeks in the South of France, never used hookup and still able to use compressor fridge,sat. tv etc. Best investment ever.
Toss