Comment by Earw0rm

The energy dynamics will be closer to a heavy ebike or light motorcycle.

500-600 watts is plenty for moving along at 30-40mph, and with such a light bodyshell, you don't want to be going a lot faster than that.

Standard automobiles are something of a vicious cycle energy-wise - weight, range and speed aren't a linear relationship, so on short-range trips we're paying a huge efficiency penalty for long-range capability. Golf buggies, ebikes and so on can be 1/10th the weight and 1/10th the energy consumption.