@Harley: The solar panels, and associated electronics + regulators, are intended for these needs:
1. I'd add a heat blanket to the floor [note 1]
2. I'll have a hybrid toilet/shower installation
3. I'll have LED lights and stuff
4. I do not want to ride my power requirement off the ordinary battery
5. I need to have power available when not being on, say, a camping site
Note 1. All will be well insulated. Floor will have the heat blanket, then the top flooring added. The heat blanket is there to avoid having to using propane 24/7. This electric heating will work during day time, but only with proper insulation.
This potential adaptation actually won't be an autocamper, but be registered as a car; however, can still live in it.
I've been reading up on law/regulations and cases in court, and in this country it seems a car under two tonnes total full-ready weight, max 5 meters long, having less than four bed-able arrangements, having no fixed seats in the rear, will not be an autocamper, and as such can be driven on public roads and can be parked anywhere on normal designated and framed-in parking slots.
It can still be allowed to be used to live in, provided I do not park it, live in it and sleep in it on these designated ordinary non-camper parking slots.
For the living part, I'll need to be on a designated area, say, a camping site.
I already have my address registered on a camping site.
To sum up: The car must be livable on a camping site, yet be driveable and parkable on public roads.
It is this compromise I've reading up on. Seems I'm closing-in on the rules specific to my needs.
You know, Denmark is littered with specific rules, preventing our beloved free-life-hacks, but nevertheless, the court decision are quite clear in their specifications and language, this to make it very clear what's allowed and what not.
@Nolan: Thanks for the tip
Well, I don't think roofing panels are any good for mobile use. They aren't made to handle vibrations, are too bulky per section, and, AFAICT, do not fit with the kind of electronics used for mobile applications.