Quote:
Originally Posted by bennelson
V2G (Vehicle to Grid) is a great idea - in concept.
The trouble is that it's pretty tough to get anybody to do anything unless you give them a very good reason to (government money for example)
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Peak electricity costs are something like 25c/kWh and up. Off-peak electricity costs are something like 5c/kWh, and storage costs about 10c/kWh. Pay the driver 20c/kWh and they make money off the situation, and the utility gets power for 5c/kWh (and up) less. This is the same reason why states (and governments) subsidize solar power. It makes the most power around peak demand and a 15c/kWh subsidy is a lot cheaper than a 25c/kWh and up natural gas peaker plant.
In terms of pay off, I can see making enough to buy a new battery pack, but not a new car. At 50c/kWh, assuming the utility and auto owner split the difference, and the owner has 5kWh of spare capacity that's used, they'll make about a buck per day. Over a decade that's ~$3,500, enough to buy a new 10kWh pack at $350/kWh.