no, but I would start with a single 100w or similar 12v solar panel, plug it in, and see how it 'works'...(which is to say, it will help to trickle charge the house battery(s)...)
then you can add more panels if you feel the need to in the future, whether mounted on the roof, or simply set out for the sun when you reach your destination, as the Alternator will be charging the House battery(s) while you are driving, and the generator when you are parked and need the air conditioning, etc.
Of course, none of this matters if you are mostly plugged into shore power most of the time.
two Campers, two Electric cars
former diesel pusher traveler