[malchow]

Arbitrary vehicle to home/home battery/grid connection is indeed coming in very short order.

https://enphase.com/ev-chargers/bidirectional

There are other products already available to do it (DCBel), and it can be hacked of course, but at the current moment everything comes with substantial corner case blind spots, mostly related to grid-forming/following switching and to the resilience of the power electronics.