Some teslas have 100kwh batteries. The Hummer EV has ~200kwh battery. Depending on how much extra capacity is needed to optimize for longevity of the pack, and

Some teslas have 100kwh batteries. The Hummer EV has ~200kwh battery. Depending on how much extra capacity is needed to optimize for longevity of the pack, and charging, it might be far less than 10 cars worth of batteries. Potentially as little as 1. Makes you think that there might be quite a few river ferries that could be converted quite economically.