Electric Vehicles of America, is it legal to convert your car to electric?

Note that I am not licensed to practice in your state.

Generally, if you own the car you're seeking to modify, you can do with it as you please, as long as it doesn't violate any state laws. Modifying a car to run on different types of energy normally doesn't violate state laws because most state laws regulate the appearance of cars so that they can be properly traced (ie: can't have tinted windows, must have license plates on front and back, etc).

If you do seek to modify the car, note that you would most likely void any warranty on the vehicle and the dealer would not fix the car if anything were to go wrong.