I am going to be building a gable roof over my deck to put solar panels on. I was wondering if it would really matter much in the performance of the panels if I went with a common truss vs a scissor truss (so I could have a cathedral ceiling). I know that people have said you don't want air circulating under the panel to allow it to cool the panel so I wasn't sure if one of these truss types would be better at keeping the solar panels hotter.
I can tell you that there would be less air space between the ceiling and the panel if I go with scissors and more air space and hence distance if I go with common.
Any ideas if it would really matter much?