NO NOT REALLY ! as for powering up from the car, what if the car breaks down ? Maybe tow a small one behind lol, yes as I said, I'm a worrier sad I know. Ignore the crazy lady and have a wonderful adventure, keep us updated on what's happening with lots of pictures.
As for the whole Africa thing, it would be a life changing experience, learning, culture, yada yada yada, she's not 18 yet ( ok her birthday is tuesday, but not yet !) And it's NAMIBIA, that's not just a different country, it's a different continent, a long, long way away.
If I worry a little about you, a full grown male I've never even met, how bad do you think I'd be with her lol