Yeah, I'm suggesting that we ensure everyone's battery is as flat as a pancake just before they set off to work...
Point is the vast majority of journeys do not require the battery to be fully charged so it's not going to ruin anyone's day if they set off with (say) 80% charge rather than 100%. I'm assuming that smart metering will allow a car owner to decide not to discharge to grid prior to a long journey.
EDIT:
Actually, looking at electricity demand through the day, there may not be much point using car batteries to infill peak demand:
View attachment 88672
There is no real peak in the morning - just a ramp up to a plateau. There's a bit of a peak in the evening which might be more promising. But the key take-home from this chart is to charge cars overnight.