Soaring Australian power prices open doors for Redflow battery, page-12

The link is for the wholesale energy market settlement prices.

Looking at December just past:

The average price for the month was 3c/kWh ($30/MWh).

The average price for the bottom 10% of the price range was 1.1c/kWh.
The average price for the top 10% was 7c/kWh.

I've done December for you. Buying electricity below 1.5c/kWh and selling above 5c/kWh would net you roughly $30k on the trades, but this wouldn't come close to break-even on your costs even before you take capital return into account.

I don't know what these figures are, but you'd be paying for network distribution costs on nearly 12MWh of power (doesn't matter whether it's coming in or going out it's the same), plus meter charges, plus registration, licence and compliance charges.