Lake Onslow Pumped Hydro a goer.

[nzoomed]

Speaking of battery banks, im pretty excited about the sodium ion battery technology, they are coming to the market this year and can be made at a fraction of the cost of lithium, its best use case will be in solar installs and battery banks where energy density is not so much of a concern as it is in EV's.
Sodium is cheap and abundant, but whats even a bigger benefit is that these batteries can be made with existing equipment used to make Lithium Ion batteries.
And over time, we can expect each generation of these batteries to get better energy density over time.