Our power company ("Tibber") provides this as a service in their app for a bunch of different car models. Until recently this just let you avoid hours with more

Our power company ("Tibber") provides this as a service in their app for a bunch of different car models. Until recently this just let you avoid hours with more expensive electricity. But now you get an extra bonus on top of that since it lets the power company provide valuable grid balancing services. It's not sexy, but it's also not that hard to implement so I suspect this will become commonplace surprisingly quickly. > It doesn't add costly cycles to the onboard traction battery I guess for many people, NOT using V2G will be a net economic loss. For a big battery, and with 20%-80% limits, we are talking about extremely gentle cycles. The degradation is likely a drop in the bucket. Battery degrades with age as well as cycles. So after 20-30 years if you haven't used V2G you risk having an age-degraded battery that didn't deliver its full capability in terms of cycle life. Or the rest of your car has degraded before your battery did. For LFP it's even more likely that V2G will get you the most value out of the battery. If you go through a charge cycle every day or two on a Li-ion, I suspect V2G won't make sense since you're stressing the cycle life of your battery. The problem is we don't really know how long modern EV batteries will last, so it's impossible to know what the most rational choice is. We also don't know what the value of a degraded battery is in 15 years, and what the cost of a new one is. Since the economies of scale around battery recycling will be so massive in 15 years, it's possible that you get paid a fair sum for an old battery, and that getting a new battery will be fairly cheap. Or maybe not.