I was reading that the electrical grid cannot support more than three Teslas in any neighbourhood, because the capacity of the grid becomes unable to supply electricity.
I know Tesla ships a “portable” 110V charger that plugs into any standard outlet with every car. You can buy/have installed a 220V wall charger that will pull 32-80 amps of power based on the car it is charging.
I could see how in older neighborhoods that could be a issue. On the low end it is like a dryer, however once a dryer reaches temp it cycle on and off for maybe a 45mins-1 hour. A Telsa will potentially be like running 3 dryers, plus whatever loads (A/C, range, etc.) for several hours. In one house, probably no big deal, but if several houses on the same transformer do it, I can see the potential for problems.