How about a 48v lead acid charger that can run off a small generator without stalling it? I have a Reva G-Wiz
and a 1 kva generator but the on-board charger draws nearly 3kw in the early charge phase, so I can't use it for topups. A 3kva generator is too big and awkward for the car. A charger as above would be very handy
Huw