That page is showing generation not use. 83% of the power SA generated was renewable, but it wasn't enough to cover their use, so they imported 28% of their power from interstate, renewables cover 45% and the rest was gas. Other states are too big to just import 28% of their power. SA is small enough they can shut down their coal and just import coal-based power from Victoria.

Meanwhile Qld, Vic and NSW each produced more than triple the renewable power SA did today.