I could have fit one huge solar panel at the back of the coach roof, one at the front. I got up there with a tape measure and tried all manner of grid-type panel sizing to try and make them fit, and without rearranging the AC and vents layout they just didn't fit right. And I still wanted to be able to walk around up there for servicing and cleaning. 26x58 panels fit well, 39" wide ones just didn't.
I was going over to the Phoenix area late last year and thought I could pick up a couple from Santan, they're surely a good deal. I didn't want the 'snail-trail' ones, but they have used panels in good shape too.
BougeRV is another source for 'rv' panels - sometimes they put their stuff on sale, or have discount coupons. Their 200W panels are nice but run a little high at regular pricing - $279. If they put them on sale or you can get a discount they could be an option. Decent product and service. They sell direct, on amazon and ebay as well. Newpowa is another one to look for. These are all mass-produced 12V type solar panels from the far-east, and are about the same in quality. Some have a little nicer frame.
I have 2X215W plus 2x80W folding for ground deploy, and a 100W just for the starting batteries. I would like to replace the ground ones with 130W each, but 26" wide panels won't find in my cargo bay so I have to watch for something 21" wide. Length is okay. The 160W 'suitcase' setup will put out about 150W, the flat ones on the roof about 275. Unless my battery is all the way discharged, we're back to 100% within 3-4 hours of good sun. Larger folders would mean a bigger SCC too. The advantage of ground-deploy is you can generally point them right at the sun in a camping location, with a 25' lead cable.
This is looking towards the front of the coach - I didn't want solar panels across the front edge for wind lift. I wanted them back away from the very front edge.
These also do a nice job of recharging the Delta Mini power bank. Output comparison - at 8AM the 160W folders were putting out 8A and the 430W on the roof about 12A. Orientation does make a difference. I no longer need to plug the RV into shorepower: