alt Hacker News> Wouldn't the charge / discharge cycles reduce the life of the car battery?
While I'd presume the answer here is "yes", I'd also presume we're talking like a fraction of the vehicle's lifetime charge cycles. Like, (generously/conservatively) 20 to 40 cycles total over the life of the vehicle, no? How often would you estimate your power going out?
Replies
frereubu • today at 5:29 PM
Duh, yes, slow brain day.
jauntywundrkind • today at 4:13 PM
I don't think that wear would be worse than driving around. Unless you go out, recharge, and come back, by definition you only have a single charge single cycle to give.
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The point wouldn't be just for backup during outages. It would be growing your kWh of storage and doing daily TOU optimization. That increases the charge / discharge profile by a lot.
Though for an 80 kWh or larger battery, you're only likely to store up and discharge 10-ish per day maybe this way? (Assuming you have actual dedicated BESS, and this is supplementing that). Still that's ~30 cycles per year, which is nothing in the grand scheme of a vehicle battery.