Could electric cars threaten the grid?
All the promotional videos and brochures on plug-in electric vehicles basically tell the same story: A happy homeowner comes home after a long day at work, parks her emissions-free car in the garage and, before going inside, plugs it into the nearby electrical socket to charge. It's a scenario that's playing out in homes across the country. There's just one hitch. When the local utilities considered the amount of energy a home required a decade or more ago, most didn't take into account electric vehicles.
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