Great suggestion! I found a video on panels screwed to a TPO roof but not anchored to the trusses. Because a panel ways 43 lbs., tilt kit and windy conditions, probably attach the array to trusses (seal properly). ...hope it’s not a big deal.
The plan is a boondock setup to power everything (ac, micro) except the propane range and Buddy heater. It’s doable for a small trailer and sunny AZ skies. System size is 740 watts (max) and 2 lithium 100ah batteries (for now).