Batteries ( energy storage actually ) has always been a critical component of a renewable energy grid.
Only an idiot would claim that it wasn't.
What about the interconnectors ? You mean all the interconnectors that were built decades ago to enable the grid to be national ? The ones that were built to support the coal and gas industry ? The interconnectors that are going to enable surplus renewable energy to be utilised rather than curtailed thus making the system more efficient ?
What about the batteries ? What about the multiple power stations that were built to provide redundancy when units are off for months at a time ? What about all the gas peakers spread over the country to support slow moving coal ? Peakers are effectively batteries.
What about pumped hydro ? What about the existing pumped hydro that was built to give inefficient coal an overnight load ?
What about the Portand smelter that received ( and continues to receive ) subsidies for 25 years ?
You better get someone to explain to you how the grid actually works before you mouth off next time.
