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Denmark to be first test market for Vehicle-to-Grid (V2G) technology. Electric Vehicle owners will be able earn about $10,000 over the lifespan of the car. Goal is to even out grid power frequency.

http://cleantechnica.com/2011/06/15/electric-vehicle-owners-to-get-cash-back-for-selling-power-to-the-electric-grid-in-denmark-10000/

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You pay to juice your car, the electric company then sucks juice out as needed and pays you some amount for doing so. Unanswered is whether you are you making a profit.

As to whether you will be left with a drained battery when you hop in to go to work (or back home), that is addressed here http://www.nuvve.com/Overview_1MYJ.html. Short answer, "No".

I suspect the Chevy Volt's battery capacity may not be large enough to participate, plus it would need extra components. I think most of us need all 10Kw. Plus the scheme seems to require that you tell the system in advance how much battery you'll need the next day. My answer would be , "All of it".
 

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As a vehicle manufacturer, the big issue with these schemes is: who warrantee's the battery pack. You could conceivably have 2X the cycles on the battery that you would have otherwise. That's assuming 1 cycle per day from driving and a second one in the middle of the night due to V2G activity.

Pete Foss GM R&D
 

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Shallow cycles that only cycle the battery less than 5% dont hurt much, supposedly 10s of thousands of cycles with no degradation. You would not have a drained pack since part of the time the utility will charge it back up, so on the average it remains at a constant charge level. $10k would definitely be worth it..

Here is a study on it:

http://www.greencarcongress.com/.m/2009/10/ceic-20090822.html
 

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Ran across this info while looking at something else.

http://nuvve.com/uploads/03_Willett_Kempton_DTU-GIV-V2G-22Sep20101.pdf

Patent Applications, 2007-2010:

• U.S. Patent Application Publication Nos. 2007/0282495 A1
"System and Method for Assessing Vehicle-to-Grid (V2G)
Integration" filed May 2007 (UD; Kempton and Tomic)

• U.S. Patent application publication No. "Hierarchical Priority
and Control Algorithms for the Grid-Integrated Vehicle", filed
March 2009, (UD; Kempton)

• Three US and PCT applications in 2010, Electric Vehicle
Station Equipment for Grid-Integrated Vehicles; Electric
Vehicle Equipment for Grid-Integrated Vehicles; Aggregator
Server for Grid-Integrated Vehicles. Filed Sept 2010 (UD;
Kempton and co-inventors)
 
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