alt Hacker NewsI’m not that familiar with the Powerwall ecosystem, but the equipment and installation that connects to your breaker is non-trivial. But I’ve seen people who add bulk OEM batteries to other home backup systems and those are fairly cheap.
Regardless, the thing that’s really great for cost effectiveness is that the same large battery can be used everyday for driving and also used rarely for emergency home backup systems.
Its still a margin issue. The Powerwallproducer wants their 20% margin, the car company might want there 20% too, but from the whole truck.