Hi Lee, I noticed at the recent caravan show at the NEC there is a growing trend to fit solar panels to the new ranges of vans. I find mine great because I never have to hook up to keep battery level topped up, being forgetful (and getting worse by the day) I'd find times when we decide to go away at short notice no power for the mover to get the van to the drive to hitch up. I have a power inverter in the van also for non hook up sites but not needed it yet.
That is my Troll for sale by the way.
Robert.