Posted February 6, 2009
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Energy Comment

Smart Grid Cars Feeding Back to the Grid

The battery in the new breed of electric car can both give and receive, taking a charge and then, through the same electrical cord, sending some of its stored energy back to a hungry electricity grid, as needed.

Supporters see the new plug-in vehicles as a stabilizing addition. They envision thousands or millions of car batteries taking electricity from the grid during low-demand periods, such as overnight, and sending electricity back into the grid at times of heavy demand.

Better still, the car owners could be paid for the electricity they return, perhaps enough to earn back the cost of the car in a few years.
Most owners use their cars just one hour a day. In a "vehicle-to-grid" world, "the other 23 hours, that device belongs to the system," said Jon Wellinghoff, chairman of the Federal Energy Regulatory Commission (FERC).

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