[sendler]

Yes the BigF'nBattery is a gold mine for it's owner's. It is making a fortune off of the backs of the consumers due to the extremely high volatility of the electricity pricing in South Australia due to having prematurely retired too much of their thermal generation. SA is a very small market, using only 2GW or so which is less than some big cities. Even being that small, the scale of storage needed to cover just 10 hours would be another 200 Big batteries. At an install rate of 4/ year is 50 years. Except that they only last 20 years. So after the 20th year you would have to start averaging 10/ year to get that amount of storage built and rebuilt.
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Or 350,000 EV's pluged into Vehicle to Grid. 1,000,000 cars if they only wanted to give up part of their charge. At least then the car owner could rake in the cash.
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Scale.
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NY state or Californina use 10-15X this amount. The USA uses 300X. Currently. Not including rolling in all of the energy for transitioning in all of the personal cars to electric. Which would almost double the demand again.
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To electrify every aspect of society of society today, not accounting for any growth, the world needs to increase it's electrical production 3X while eliminating all carbon fueled sources. So far, wind and solar build out are not even keeping up with growth. Let alone replacing anything. Let alone another 3X for the conversion.
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Do the math.