> every (second) house would have a powerwall, wouldn't that make the grid stable?
At 131mm American households [1] and $11.5k per PoweWall [2] that’s over $750bn at 50% loading.
[1] https://www.statista.com/statistics/183635/number-of-househo...
[2] https://www.thisoldhouse.com/solar-alternative-energy/review...
China is starting to mass produce NaCl batteries. They will be cheaper.
And also only Powerwalls produced in this quantity would have way lower prices. My point was batteries are getting cheaper every day.