Where to mount solar panels on roof?

Thanks, I think what they sell are as good as any.. their construction is good. If I can get 2-3 hours sun I get plenty of juice for us. We recently took a 12 day trip to Michigan U.P. with no electric the whole trip. We camped in the shade and on sunny days it still helped, not enough to keep. Then moving to the next campground it charged up most of the way. We had enough battery to never be a concern.