I and a lot of others have roof top solar that always lays flat. This works great if they produce enough electricity to recharge your battery. My panels at 200 watts rated output regularly keeps my battery at full charge even in partial shade.
I have read elsewhere that a good item to go with portable panels is some kind of locking system to prevent sticky fingers.
2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6