"6-19 GW of new dispatchable resources are needed to backup renewables by 2040Depending on the scenario, the NEM will need 6-19 GW of new flexible, utility-scale dispatchableresources to firm up the inherently variable resources".
"C3.2 Gas-powered generationGPG can provide the synchronous generation needed to balance variable renewable supply, andso is a potential complement to storage. The ultimate mix will depend upon the relative cost and availability of different storage technologies compared to future gas prices."
There are periods when the wind doesn't blow all over Australia and it didn't blow for 27 consecutive days in SA a while back There is not much prospect of having enough storage to run whole the country for several days, even if it were possible the cost would be impossible. We are a long way from batteries being economical enough to provide for anything but short term frequency control .
