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POPSHow Electric Cars Could Save the Grid Benefits of the "Vehicle to Grid" project being developed by researchers at the University of Delaware "electric vehicles could do more than provide backup energy. If just a quarter of the nation's cars were electric -- about 50 million cars -- the power capacity of those batteries would be equal to 700 gigawatts, the entire power production capacity in the United States today" "For the system to have the most value, electric cars need to be equipped with a high, 80-amp/240-volt plug -- something a little more powerful than the plug on an electric dryer. (An electrician can install the corresponding outlet into any home.) But most of the existing electric hybrid cars come equipped with a low, 15-amp, 110-volt plug." "the low-amp plugs work...but if the electric car owner is selling electricity back to the grid, they want to sell as much as possible. A 15-amp plug could net a car owner about $400 year, whereas an 80-amp plug could net $4,000"
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