RE: electric cars<br>what about people who drive when energy is cheapest? will i get into my tesla 2030 model and find i have no battery because energy was expensive so my car sold off the electricity?,(reply>), You'd probably set up the car's computer to just use the top 10-20% for grid-balancing, so worst case, you'd come back to it 80% charged, unless the car was below that when you plugged it in and you weren't gone long enough to charge it beyond the grid-balancing threshold.