Look out Snowy2.0, new battery storage may be lower cost as well as shorter lead time, less remote, less vulnerable to grid failure.

US utility to pilot “acqueous air flow” battery – backed by group including Bill Gates and Macquarie Capital – that promises to deliver 150 hours of storage at very low cost.
— Read on reneweconomy.com.au/holy-grail-of-big-batteries-first-pilot-for-gates-backed-battery-with-150-hours-storage-97845/