There is plenty of space on the roof. The wiring would be a snap as you could go down the back of the closet cabinet. Problem is you have to drill a hole in the roof of your van.
Right now I've got a portable 120 watt panel that works pretty well.
Considering this van is pointed towards the sports-active types, and not necessarily full-timers or long term campers, solar may be seen as unnecessary. If you are just over-nighting in non-cold weather, the single battery will easily last 24 hours until you start up and drive the van. Also, since it has a generator, you have that charging option too.
