Sharp PV Panels are widely used around here, and must withstand rough CO Weather. Shown below are 180 Watt Panels [min spec; usually exceeded]. See 1/2 of a ~10 kW Residential install here; 27 x 180 Watts:
Boulder County puts the hyphen in 'A-R' in terms of Codes, so I'm guessing the Array above had to be spec'd to 100 MPH at least... The base of the Rockies is seriously windy in the Spring.
Sharp PV Panels
The lil L Brackets seen in the pic above, and the Channel Hardware that Bolt Heads slip into, are all mature Hardware. The usual method is to mount the Panel JUST up and off the Roof. If you wanted to do that, you'd need only put, say, some Metal Roof Panels on your Boat from a Big Box or Ranch Store, and capture the Panel[s] at the Roof peak and lower edge. This might simplify things. Isolating the 'sealed Roof over your Head' function from the 'generating power' function might be something to consider. Sounds like an interesting Project you've got going.
Solar Shingles were launched nearby us down in Golden CO at NREL [National Renewable Energy Lab]. As the term 'Shingle' implies, they tolerate Roof conditions. There's also classic-design 3 Tab Shingles out there that are Solar PVs. They interconnect together using lots of lil Red and Black Wires.
Solar Shingles