How would power wall lead to them going under? They would just be selling excess batteries, which seems to be one of their advantages over competitors. Autonomy

How would power wall lead to them going under? They would just be selling excess batteries, which seems to be one of their advantages over competitors. Autonomy, I'm ambivalent on it, they can charge customers for it right now and many will pay. If anything, the solar city/roof shingles side-show has seemed the worst to me personally, alongside the falcon-wing doors and the self-infliction of twitter harm by the CEO.