Soaring Australian power prices open doors for Redflow battery, page-22

Yes, and the month's peak probably only lasted 30 minutes. You have to be able to pile-drive your power into the market to get the price... same as all the other generators are doing. Both peak and trough prices are usually very short-lived. When the price is low generators will very quickly pull their supply off the market so they don't lose money. And when the price is high they will equally quickly pile on to get the good prices. However, there is still a lot of volatility in the individual settlement periods.
You can download historical price/demand data here:
https://aemo.com.au/Electricity/National-Electricity-Market-NEM/Data-dashboard#aggregated-data

I can't upload a spreadsheet, but here is an example of the raw data:


The colouring is mine... Green is for prices in the top 10%, red for the bottom 10%.