Mostly batteries. I use rechargeable batteries for my cave lights and AI wireless pressure senders. I hope I get to charge a scooter some day.
I actually have the switch box open on the table in front of me and am doing some updating. It runs off of battery power through a square wave inverter. The switch allows battery power to the inverter until I plug the van in through the receptacle on the driver's side. One relay switches the outlets to run off of shore power and another cuts the twelve volts going to the inverter to eliminate any floating issues. A 10 amp smart battery charger is energized in the process to make sure the Sprinter stays fully charged. I am inordinately proud of the set up. Can ya tell?
Since this is a high top Sprinter, closing the side door turns the van into a changing room. It's a fully fiber glassed cargo interior with drains for any water coming off of the gear. The only thing I really need/want to add is forced ventilation when the van is plugged in. More pictures here:
2005 Sprinter