Attach it to the tow hitch framework like a bike rack. :) I suspect that would really mess with the load dynamics on most passenger type cars, as the generator

Attach it to the tow hitch framework like a bike rack. :) I suspect that would really mess with the load dynamics on most passenger type cars, as the generator would be pretty heavy. I don't think you'd be able to lift a big enough one into the trunk area, and attaching it to the back of the car would be a pain too. I think towing solves a lot of issues for the idea.