I wonder if anyone has considered buying a Tesla (free recharges for life), driving home every day and finding a way to discharge the battery back into the grid through their meter to negate their home electricity bill.
The idea here is that you "bring free energy home" from Tesla's solar-panel-powered stations (leaving you car battery empty), not that you get to use it twice.
utilities have looked into this "smart grid" application for a while.
The bigger issue, I think, is what's the likelihood that your house/grid will drain your car battery before it can be recharged enough for you to be able to drive somewhere?
And you just _know_ someone is going to complain about "my car battery was drained without my permission! privacy rights! privacy rights!"