I currently have no interest in using any, but may still consider some for my travel trailer for Alaska trip in 2021. However, for our coach, I would probably use the flexible ones because easier to attach, more coverage available on the roof surface without a bunch of brackets. I've read that they aren't as efficient as flat ones though. Figuring extra panels will help to offset that.
But if you used actuators to lift or tilt the panels then cleaning them would be pretty easy from the ground.
Eddy, what would you think about a site deployable folding rig with powered actuators? My thoughts are, maybe you could have a center stick of panels a few inches off the roof laid flat as a rigid base and then a pair of hinged "wings" with robust frames and pivot points that would swing up and out to deploy, folding in to a 3 layer stack with alignment pins in the folded position, and it shouldn't be too hard to add powered safety latches. Acordian type links could be used to hold the weight when deployed. Something like a small HF winch could be used to deploy each side, and with shafting used to form the winch drum as well as the hinge pins, several sticks could be linked to a single pair of winch motors. You wouldn't get any charging while on the road, but the solar cells would be more protected. Plus it would give you more shade.Jim
If you haven't already see it, you'd enjoy seeing the YouTube videos done by Beginning From This Morning about their solar array. They have panels on the roof which are moved by servos - they tuck in for travel and extend out for use. If I understand your idea it sounds similar to what they did.Here's the 4th video in their series on the install: https://www.youtube.com/watch?v=wQRnECDIQ8E