As I just said in a different forum...
The new price point that Tesla is setting, with a decent round-trip efficiency, is astounding. Maybe 1/3 the retail price of what I was observing recently.
Also, storage allows:
* Reduced grid flows and infrastructure sizing/costs.
* Reduced losses for grid flows (eg up to 9% in the UK from transmission and distribution).
* Admission of more zero-carbon generation on to the grid.
Rgds
Damon