1) This only works when the overlap peak electric demand and peak vehicle demand do not overlap. Night time, when the cars sit idle, is also a low demand time of day, and the afternoon energy demand peak coincides partially with the evening commute.
2) The loss of value to the owner based on cycles used needs to take into account that the failure of the battery in a vehicle can be what causes its final retirement, i.e. the condition of the vehicle itself does not justify a new battery expenditure. EVs are more like cell phones than ICE cars, which can have lifespans of over 30 years in the right climate. So losing 10% of your cycles to grid support could mean buying a car at nine years instead of ten years.
Take a $40000 EV with half of the value being in the battery. Financed, say it's $600/month on a six year loan. With a ten year life span that's four years of no payments. With V2G say you lose 10% of your cycles, so you have three "free" years instead of four. Your real cost is 12 * $600 = $7200.
You can't just calculate the pure cost of the battery with V2G, you need to take into account the depreciation on the entire vehicle as it relates to the battery. In fact, we know very little about how BEVs will depreciate.
2) The loss of value to the owner based on cycles used needs to take into account that the failure of the battery in a vehicle can be what causes its final retirement, i.e. the condition of the vehicle itself does not justify a new battery expenditure. EVs are more like cell phones than ICE cars, which can have lifespans of over 30 years in the right climate. So losing 10% of your cycles to grid support could mean buying a car at nine years instead of ten years.
Take a $40000 EV with half of the value being in the battery. Financed, say it's $600/month on a six year loan. With a ten year life span that's four years of no payments. With V2G say you lose 10% of your cycles, so you have three "free" years instead of four. Your real cost is 12 * $600 = $7200.
You can't just calculate the pure cost of the battery with V2G, you need to take into account the depreciation on the entire vehicle as it relates to the battery. In fact, we know very little about how BEVs will depreciate.