Haven't installed yet, but here it is just laying on roof. It is a little more expensive than a rigid panel, but I'm hoping the easier install will make up for it. It's on sale now from Renogy.
If you order it from Amazon you don't get the sale price.
It only weighs 3 lbs and since it is made of plastic, it can easily be moved around without scratching your trailer. Notice the cables come out the top instead of bottom.
I plan on attaching to roof with 3M VHB tape although it does have predrilled holes if you don't trust VHB table. Renogy said it can be installed flush on trailer because it is white. Actually they said it shouldn't be installed on large, dark surfaces.
I've got a few things I haven't figured out yet like where to cut the hole in the roof, best way to route cables, where to mount charge controller, how to easily add a 2nd panel without having to redo cables, etc.
I think I have everything I need except the battery
cables and they should be here Friday. I'm also going to cut the cables and make them the exact length I need. MC4 connectors are real cheap, so I ordered a few.