Seems to be a series hybrid which is unusual. Most hybrids are parallel and connect the engine to the wheels. The electric double conversion of a series is less

Seems to be a series hybrid which is unusual. Most hybrids are parallel and connect the engine to the wheels. The electric double conversion of a series is less efficient than a direct mechanical connection especially at highway speeds. Somewhere in the 80% range for series double conversion vs 96% for direct mechanical drive. Also you have the weight of the dedicated generator vs using drive motors as generators in a parallel hybrid. Hybrids are usually not that useful for a vehicle that does mostly highway driving, in parallel hybrids the hybrid system is doing very little on the highway. The van is obviously designed for urban routes with lots of stop and go so the series hybrid might make sense there, but with campers you are typically doing long distance highway travel and very little stop and go. Not much info on the drivetrain technology I can find. Electric RV's will be great but they will need really big batteries. In the US you want a vehicle that can do at least 300 miles at highway speeds but really 500 miles for 8 hours of driving then charge overnight at a campground. I wouldn't really be interested until there are Class A RV's with megawatt hour batteries and decent charging infrastructure (3 megawatt HPCVC) since that what I currently have and love to travel in cross country.