There is better energy storage method than batteries availabe in some parts of the U.S..
We have it a few miles from here. It's a reservoir that they pump water into during low energy usage times and then drain it through turbines to generate electricity during high usage times.
It seems like a great energy storage approach to me, but there must be problems with it because it's not used many places. Maybe the main problem is due to lithium battery storage being the "hot thing" right now.
BTW, are large "lithium batteries" still really only a whole bunch of little lithium batteries wired together into an array ... or have they finally figured out how to scale a single lithium cell up to huge sizes? If not, there's an awful lot of connections required to create large lithium battery storage capacity - and we all know how the reliability of many connections stacks up against the reliability of just a few connections.