Re: Look to Dinorwig
ask yourself this: how many cars would it take to respond to a 10% increase in electrical demand, something that might happen when everyone arrives home and starts turning lights/heat/AC/stoves on...
capacity of one electric car - about 50KWH (being as generous as possible)
Total electric demand on average in USA - 450 million KW (if I calculated right, 3.9 trillion KWH per year / 8760 hours per year)
number of fully charged plugged-in cars it would take to sustain that for one hour - 9 million (being generous). That is average, not peak (when "help" would be needed, so at least DOUBLE that demand value for a more realistic estimate).
And do not forget that for every KWH coming out of a car, most likely 1.1KWH (or more) would have to go back IN.
A 10% jump would need 9 million cars to take up the slack for one hour - and with an unrealistic generous estimate of around 1 million cars plugged in at any one time, they'd be completely drained in about 7 minutes... unless my math is off. No driving for YOU until it re-charges in several HOURS.
Realistically this kind of battery drainage would damage the cars, so you can probably assume the demand peak would have to be more like 1% which is NOT very practical, assuming that people are willing to have their car batteries COMPLETELY drained like that. I doubt it.
using plug-in electric car batteries for peaker storage is an impractical pipe dream.
Solution: BUILD MORE POWER PLANTS TO HANDLE DEMAND THE OLD SCHOOL WAY (nuke plants preferred for oh SO many reasons!)