However, it accounts for about a third of all new electricity production. You have to remember that a cap-and-trade bill is going to be what makes both V2G and renewable energy profitable, so if it becomes profitable to build V2G cars then it will also be profitable to increase wind capacity. I forgot that solar thermal is also an excellent candidate for creating electricity at night, since you can store excess hot water very efficiently during the day and then use a small amount of natural gas to make sure it's at the optimally efficient temperature to spin the turbines.
[Windpower] accounts for about a third of all new electricity production.
No. Here is the Wikipedia quote: "Wind power accounted for 35% of all new U.S. electric generating capacity in 2007." (Emphasis mine.) Capacity is not production. Capacity-factor helps us understand how much production we can expect from a given capacity. Here are the capacity-factors of two recently-installed wind turbines:
Hull 1 is a turbine that was built to replace an older one that -- as frequently happens to wind turbines, but has never happened to a nuclear power reactor -- had been destroyed in a storm. (http://www.hullwind.org/history.php) Being destroyed in a storm further hurts lifetime capacity-factor.
http://en.wikipedia.org/wiki/Wind_power_in_the_United_States
However, it accounts for about a third of all new electricity production. You have to remember that a cap-and-trade bill is going to be what makes both V2G and renewable energy profitable, so if it becomes profitable to build V2G cars then it will also be profitable to increase wind capacity. I forgot that solar thermal is also an excellent candidate for creating electricity at night, since you can store excess hot water very efficiently during the day and then use a small amount of natural gas to make sure it's at the optimally efficient temperature to spin the turbines.