Unfortunately when you look at the problem of battery storage in scale, the world's largest battery in Australia makes a contribution that is barely visible as noise at the bottom of a chart that only has 2 GW peaks. NY State or California each use 30 GW at times. And this is before the required 4X conversion that will be needed as oil supply tips over the top soon.
.
ELJM: NEM Regional Generation Summary
.
.

.
.