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Old 11-15-2008, 12:55 PM   #1
AVANTI R5
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Default Utilities expert says that nationís grid is ready for plug-in hybrids




Quote:
According to a specialist from the Electric Power Research Institute, The U.S.ís power grid will be able to handle an onslaught of plug-in hybrid vehicles. Eladio Knipping, senior technical manage at EPRI, said that with smart planning the transition should be pretty smooth.


Knipping, speaking at the Automotive News Green Car Conference, said that even if the plug-in hybrid penetration rate in the U.S. rises to 60 percent by 2050, the grid can handle it since it assumes a modest increase in power load over time. However, he said that power companies would need to start using smarter technologies to maximize electricity use in off-peak hours.



Knipping said that consumers would also need to be educated as to what is the best time to charge their plug-in hybrids and would need incentives to charge at night, such as lower raters.
http://www.egmcartech.com/2008/11/14...ug-in-hybrids/
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Old 11-15-2008, 02:06 PM   #2
Mike Wevrick
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Logically you would charge the car at night. But the reality is people will plug their cars in as soon as they get home, at the same time that they are running their AC, watching TV, cooking dinner, etc. And the power grid is already marginal in some areas ...
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Old 11-15-2008, 02:26 PM   #3
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Originally Posted by Mike Wevrick View Post
Logically you would charge the car at night. But the reality is people will plug their cars in as soon as they get home, at the same time that they are running their AC, watching TV, cooking dinner, etc. And the power grid is already marginal in some areas ...
That can be a good thing, actually. If the battery isn't dead, then instead of charging right away it can put power back onto the grid during that late afternoon peak time, reducing the need to run expensive natural gas "peaker" plants.

The concept is variously called "smart garage" or "vehicle to grid." There's been quite a bit written about it and a few power utilities are running trials to get a better understanding of how it could work for them and for consumers.
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Old 11-15-2008, 03:03 PM   #4
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Originally Posted by Mike Wevrick View Post
Logically you would charge the car at night. But the reality is people will plug their cars in as soon as they get home, at the same time that they are running their AC, watching TV, cooking dinner, etc. And the power grid is already marginal in some areas ...
Actually, the greatest load on any power grid is middle of summer at 2PM. overnight charging isn't an issue. Now, charging at work during the day, that's another matter.
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