[sandworm101]

I'm not sure it a totally rational thing. This is effectively putting more miles on your battery, an item that costs tens of thousands of dollars to replace, if even possible years after purchase. There would have to be a substantial compensation for such use even if it only degraded the lifetime a few percent.

But at such a compensation level, one could probably just purchase deep cycle lead acid marine batteries. They could sit in one's basement charging/discharging at a much lower cost than the lithiums in a car.

[thelastgallon]

The price of batteries has declined by 97% in the last three decades:https://ourworldindata.org/battery-price-decline. And it continues to go down! The chart ends at 2018, $181/KWH. 2024 forecast is $94/KWH (half of 2018 price), 2030 forecast is $62/KWH. Thats just Lithium Ion. Newer chemistries are even cheaper. CATL first-generation cells (Sodium Ion) cost $77 per kWh, expected to drop to $40/KWH.[1]

Current estimate for a battery replacement is 4K - 20K. With energy storage's learning curve, this will be soon under $3K.

1)https://www.nextbigfuture.com/2022/12/catl-will-mix-cheaper-...

https://about.bnef.com/blog/behind-scenes-take-lithium-ion-b...