[mdorazio]

I don't think you appreciate how much power is required for a supercharger station. Put it this way - if you had a SolarCity panel array the size of a Model S, it would produce enough power in a good day to add about 35 miles of range to a single car. Multiply that by the amount most people are actually charging when they pull in, and the number of cars utilizing a charger. It's just not even close to practical unless you cover the entire roof of a nearby building, and then you would need a huge battery somewhere to store the collected power for charging at night. Supercharger stations connect to the grid for a good reason.