That sounds like an idea for me to look into to charge my electric joystich wheel chair batter whilse it's still inside th ecar . Currently I slip and old law mower cable in to the granny charger . I take power from a shielded pull out on my caravan side wall which is RCD protected .What about a solar trickle charger stuck inside the back window or sunroof and not worry about plugging it in and disconnecting it. Even less hassle.
Twice in almost 11 years ( early on ) I have driven away when it's been chucking it down with rain at night. On board charging sounds ideal as It does not get a lot of use most weeks , just a short supermarket jobby every four or five weeks by my MS disabled wife.


