The Tennessee Valley Authority has a new kind of charging station prototype out in Knoxville - called the TVA Smart Station Initiative. The concept happens to be a pretty interesting one. You take your car to one of these charging stations and you see what looks like a huge carport - big enough to park several cars in. The top of the shade is actually a huge field of solar panels. Of course, since green cars need a considerable amount of power draw, a set of solar panels the size of six cars will never be able to actually charge six cars. They will only be able to supply a small fraction of the power needed.
The idea is that most cars that come by to get charged can get their power directly off the grid; but the solar panels, that will produce electricity whether or not there are cars charging at the station, will be feeding the grid for as long as there is sunlight. It happens to be a cute way in which to offset the kind of power that these cars draw. To make the power available at these charging stations extra cheap, there is a battery pack at each charging port that charges up on cheap power in the middle of the night when off-peak rates apply. Of course, each charging station costs hundreds of thousands of dollars; and cheap electricity is certainly not going to make enough of a profit for anyone. These are just experimental projects.
Now assuming that owners of green cars would be willing to actually plug their cars in and wait around for at least a half hour to be able to get a useful charge, there are other intriguing ideas out there as well. A new Silicon Valley startup with an iPhone app called PlugShare wonders if all this expense put into the building of charging stations could really be a bit unnecessary. Since every home has 117 V power, they wonder if they can get people to set up a little charging station in their driveways (which would amount to little more than a $1 power outlet) and sell power to anyone with an electric car who wishes to plug in. Owners of electric cars could just look up on their PlugShare app where they could find the nearest home with power outlets to share, and then drive over to plug in.
People who allow you to share their power outlets won't really be spending much - just about 15 cents an hour. If they want to charge a driver for it, they could do so.