As one comment points out, electric needs to be generated by some other energy source. Solar makes more sense in places like our west and south, and Puerto Rico. There is also wind power being generated in quantity by some countries and in some of our states, like West Virginia where I own property and elsewhere. We will also need our other energy sources for some time to come. I for one will be happy when we need enough less (since we import 1/2 our needs) to say adios to Venezuela, the Middle East, and Russia.
Technical problems are major. As one person pointed out making a universal plug rather than several kinds. Ever hear of the National Thread Screw Comm. (or something like that) which was formed so screws, nuts and bolts would have compatible thread sizes. Also, how do you carry a gallon of electricity from the station to your stalled vehicle? What are some of the others?