Primary energy replacement obviously will require more than that, but it won't be so bad as people make out, since electrification can drive massive efficiency increases - electric cars are 3-4x as energy efficient as ICE cars, and there are very few places in the parts of Australia that get decently cold that are too cold for air source heat pumps, so that's a 3x efficiency increase over gas space and hot water heating (even as much as 5x for CO2 hot water heat pumps!).