No discussion about how many amps per charge these little jewels will eat up. For a 220 volt charger, an overnight charge every single day is going to add up pretty darn quickly, and it won’t take the installation of a swarm of these chargers to suddenly overwhelm the local neighborhood grid and fry transformers.
This is one way to force a massive upgrade in the electrical grid...
What I hear in the Smart Grid meetings from folks associated with the electrical vehicle aspect is that one of these cars will on average roughly double a household's consumption of electricity -- which means a LOT more peak consumption.
One plan in development is some kind of communications between the "utilities" (grid-side of the meter) and the charging stations (consumer-side of the meter) to level out the charging peak loads on the transformers.