Hi folks. First post here; big thank you for the informative thread. We presently have a 2006 Jayco Jay Feather 23B hybrid, but are looking at a Roo 233S as a replacement, so have been looking on your excellent forum.
Optipro, saw your earlier thread regarding roof mounting the panels. Looks like you went a different direction and happy with it. Just adding our experience for others who are considering roof mounted panels.
Our older Jayco has a similar roof system to the Roo, consisting of (from the top) TPO rubber membrane, 1/8" luan ply, Styrofoam type bead board, 1/8" luan ply c/w headliner material. Like the Roo, the whole assembly is vacuum formed at the plant. Main difference is the Jayco roof was flat rather than radiused. Jayco has since changed their roofs to a curved truss system.
At any rate, we have had two 80 watt rigid solar panels on the roof for eight years with no issues. I think we have a pulse width controller Herk mentioned. They were mounted professionally, so I don't know the exact fastener used, but they are held on with four brackets on each panel, and stand off the foot about an inch. No fasteners protrude in to the interior, so some type of anchor.
In my experience the bonded panel roof is OK for this mounting method as long as it is not compromised by a roof leak, which is kind of a whole different issue. For forested camp site applications I can see the advantage of the high quality portable setup Optipro has. We like the roof mount as freight space in the trailer is generally at a premium.
We tend to dry camp at fair grounds for dog shows. As we are usually out in the open in a playing field or similar, the roof panels get plenty of sun, and we don't have to use any additional setup room for the panels. We never run out of power in a four or five day show, and never have to run the generator for charging, just for grooming the dogs.
Our local RV stores have displays showing very thin flexible panels. Here is a link; this is the Canadian company that supplied our system years ago, but sure you have similar panels in the US.
I am not sure how these would work for attaching to the EPDM membrane on the Roo hybrid, but might be worth a look. They will certainly fit the roof curve well, just not 100% sure on fastening to the EPDM so they are removable for maintenance / repair and whether there would be a heat buildup behind the panel?
Anyway, thanks for a great forum and sorry for length. We will be deciding on our new trailer in about a month; gotta say the Roo is looking pretty good against a new Jayco.
2006 Jayco Jay Feather 23B
2015 Roo 233S ?