A typical single family home might have a maximum draw of ~20kW (e.g., the house runs off of one 220V circuit with 100amp capacity. But overnight that could work.

Even for a commercial electric fueling station, though, it's tough. To have a throughput of 4 cars every 11 minutes, which is far less than a typical corner gas station, you need a 1.4MW line running to that gas station. 1.4MW is *huge*. A large data center, like Google or MSFT class, might draw 100MW. Ditto an aluminum smelter. 1.4MW is large even by industrial standards, and being able to support that kind of power draw at "charge stations" in suburban neighborhoods, let alone rural crossroads, is a big problem.

And that's only a 4-station setup. Imagine how many MW a Costco-style setup would need.

If electric cars are trickle charged during non-peak hours and that's it, there's quite a bit of room for them. Have any significant fraction of people wanting to fast-charge a car during the middle of the afternoon and you're rewiring every single powerline in the country, in addition to adding all the new power plants.

According to a buddy who is running a company developing a differnt alternative vehicle energy source that MIT LiON technology has some issues with scaling up and longevity, but I don't recall his claims in detail (and of course he has reason to doubt them).