All the data for the national energy market is public: https://explore.openelectricity.org.au/energy/nem/?range=7d&interval=30m&view=discrete-time&group=Detailed
Not sure what everyone else is on about we are heavily invested in renewables now:
All the data for the national energy market is public: https://explore.openelectricity.org.au/energy/nem/?range=7d&interval=30m&view=discrete-time&group=Detailed