It shows how vulnerable we are if we rely on renewables and how...

It shows how vulnerable we are if we rely on renewables and how much back up we will need as renewable penetrate the energy mix, we will need gas peaking plants to keep the system stable.
Just replacing 11.3 GW of black coal 24/7 power over the next few years with renewables is a massive task.

	Black coal	11.3 GW		48%
1	Brown coal	4,375 MW		19%