Solar on the roof of a 117dbl Okanagan?

Found that the foam core is sandwiched between plywood so that should hold screws / lags. Almost done if I can find where the prewires come thru the roof!!!!!

Thanks for the responses! I will attempt to start opening things up from the inside and try see what I have to work with.

Itchey, The solar deal was a one day sale from Home Depot brought to our attention on 4/08 by Boatycall. Wish I would have bought 2 as this was a great deal!!!

I had a Okanagan 96db , when I put solar on called them and they sent me a framing diagram , of coarse that was when they existed still.
The guys that owned the co and his brother are both at Adverturer now and , I hear rumors of them starting Okanagan up again once in awhile
You might call them and see if they have any info or drawings still.
Failing that , or maybe before that , I`d pull out the ducted AC registers , or speakers and look up in the ceiling , I believe its a wood truss frame ,with 3/8 on top and 1/4 on the inside or something like that, push up on the interior ceiling and see if you can tell where the framing is, its carpeted right? so you cant use a stud finder
Instead of using store bought Z brackets to mt the panels , use one foot long pieces of alum angle back to back to form a Z , that way you have more chance to cross a truss at a perpendicular angle , if you cant find the truss use a 1/32 drill bit under where the angle will lay to find the truss , lay dicor under the angle to cover the small holes and seal the whole thing down when you screw it down .
The other good thing about back to back angle is you can bolt them together , and un bolt them leaving the half that's mounted to the roof , and remove the panel if you have to later

If 'rubber on foam core'- that likey wouldnt hold it, so at minimum leading edge needs to be anchored. Must be (I would think) some kind of structure? Holds AC etc?
Details.. but I cant help. Did a brief google and seen at least one for sale that had solar.

Cannot help with the installation, but tell us about the solar panels, we are always interested in great deals!