If your goal is to level the demand/supply equation.
A super huge battery is not necessary.
Here in Victoria, supply cost per KWH can be anything from zero to $5000.
All depends on supply and demand.
The small battery in SA has made a difference, and has made a profit. Storing when cheap and selling when dear.
Flattening out the peaks and troughs will help.
Reality: This morning drove across Victoria from the west. Then ferry to Mornington Peninsula. A bitterly cold day with heavy cloud. At Winchelsea the huge wind farm was still no wind, no solar.
The heater worked when we got home this afternoon. Thanks coal.
