Peak electricity demand occurs in the evening when people come home from work and start cooking and watching TV and giving the kids and bath and so on. Bring yo

Peak electricity demand occurs in the evening when people come home from work and start cooking and watching TV and giving the kids and bath and so on. Bring your car home, plug it in, and it supplies the grid at this peak time. Then it charges up again overnight when demand is otherwise low, and it is ready for you to go to work in the morning. As long as you have some charge left in your battery at the end of the day, it can work out fine. Also, some of us work from home, or commute by public transit, or whatever, and only use the car on weekends.