Yup, as others here have said, it's scary drilling holes in the roof of a new RV, but I think the panels are firmly mounted. Each has 7 brackets, butyl tape underneath and Dicor on top.
The inverter is wired to the L1 (Black) lead on the generator prep leads, triggers the automatic transfer switch, and I have power to most of the RV. 2 breakers (water heater and battery charger/ 12v power supply) at the panel are left off. A/C on L1 will not be ran even though the Sensata Low Frequency inverter would "probably" run it, it would be too much and drain the batteries too quickly.
Trying to link photos....