I've gone almost a month now with only the 110 charger that comes with the car. Granted, I don't use it as a daily commute, but I have been driving almost daily, only have yet to go more than 50 miles at a time. So for me the 110 is just fine. I think it really boils down to a) how far your daily commute is (if you have one) and b) how much you absolutely hate having to buy gas (my pickup gets about 15mpg, and I absolutely hate refueling the damn thing...)