The V2G in all EVs works by initiating a "fast charge" session that allows the V2G adapter to connect directly to the high-voltage bus. And then it just discharges the battery instead of charging it.
This also works with Teslas, but the car monitors the current draw and stops the session if it detects more than ~6kW negative power draw. That's why the fix for Tesla is simply to _stop_ doing that.
AFAIK not all Tesla's do that. I agree they should explicitly enable that and come up with some sort of warranty condition / upgrade.
Saying that I'm a pretty big V2G skeptic. I've setup excess solar charging for my car and it's kinda PITA to micromanage $1 savings. V2G is even worse + you spend something like $4k on equipment when same can buy 30kWh worth of batteries and forget about it. IMO costs will drop eventually tho.
The V2G is nice because you can easily have ~100 kWh of usable storage if you have two cars. That's enough to run literally everything, including the AC, in my house for 2 days. It probably makes no sense on its own, but it can be great as a part of the system.
Depends where you live. Where I live now grid is solid. Used to live a place just few km's away albeit slightly rural-ish where it would loose power at every major storm.
This also works with Teslas, but the car monitors the current draw and stops the session if it detects more than ~6kW negative power draw. That's why the fix for Tesla is simply to _stop_ doing that.