[bwhite]

Lithium-ion batteries are supposed to be pretty good as resisting self-discharge, losing only .3-.5% per day (or around 10% per month). The Tesla S has the 60 kWh or 85 kWh battery, so replacing around half a percent of that each day is 300-425 Wh. That's not much at all! If the battery replacement machines are simple and foolproof, perhaps home delivery of batteries and a small trickle charger could be a competitive model to full-blown home chargers?

Storing the batteries at the station will require much more volume than the analogous amount of gas/diesel. And a dumb tank beats a smart battery charger with software and EEPROMs if your concern is resiliency. Some EV problems are pretty clearly chicken/egg adoption problems. But there are some real infrastructure problems, too, and other changes may bear far more fruit towards the goal of more efficient energy exploitation.