They had a range extension trailer for the original Tesla roadster. I don't know how popular it was... The main issue with that is the total efficiency isn't t

They had a range extension trailer for the original Tesla roadster. I don't know how popular it was... The main issue with that is the total efficiency isn't that great. If you're not taking frequent long trips, than it seems a pure EV makes the most sense. You can just rent a car for the longer trips. If you are more frequently taking long trips, but your daily trips are often short enough, a PHEV can make the most sense.