My solar panel is portable, not permanently mounted...I mostly put it on the ground or on my cargo rack in back. It's 100 Watt Lensun folding "suitcase"; I chose it because it is very light...I think @ 11 lbs. I do tuck it in the car every night but it's not a huge inconvenience. I've had it 2 years.
--Time and trouble will tame an advanced young woman, but an advanced older woman is uncontrollable by any earthly force. --Dorothy Sayers