1 - that's what varistream does, tick
2 - free if you keep an eye on the filling and switch off. If worried about it, have an overflow pipe to avoid mess in van, tick
3 - same as 2 (rolly eyes) (they're already padding the features out), tick
4 - known to be extremely unreliable measures, you'll end up using a hand held meter anyway, tick
5 - water temperature? Are you pulling my leg?, tick
6 - the split charger is included? Who wired that in? What make and spec on that?, tick
7 - voltage display - that'll be comforting when you've killed your system after having relied on it for your techy habits!, tick
You don't need seven 'features', mate, you're not a brain surgeon, you'e not inventing the internet or going into space, you are a cleaner.
Ridiculous!