$350 per kWh is the real news.
Beats the few competitors out there by quite a bit.
Does pretty clearly show that Nissan's $250 per kWh replacement heat resistant pack with trade-in is at least somewhat below production cost.
Yes, lead acid is cheaper.
But only a small part of the real world limited market for home energy storage is willing to put up with the space and maintenance requirements of lead acid.
Powerwall seems pretty incomplete without inverter system readily available that automatically switches between on grid and off grid.
Maybe Tesla is using the "build it and they will come" approach
Does Power wall have a temperature control system
Is it OK to use it in your 120F garage in Phoenix
Or even your Chattanooga garage that sometimes hits 105F