Rooftop solar has installed capacity of 20 GW but today total...

Rooftop solar has installed capacity of 20 GW but today total production of solar on AEMO site is 3595 MW, there is a massive difference between installed capacity of renewables and production.
Today black coal is producing 11.2 GW 24/7 and that is the challenge,

We have 9.9 Kw system, and we will eventually get a battery and that will need to be replicated across Australia to help with the challenge but now we are generating 250 W so Australia will need another big source of power and at the moment we do have gas in Victoria, but we have a pig-headed government that is in denial about there being much more gas available, under pressure from Bowen for the first in 10 years they have granted a production permit.
Given that in Victoria gas is used in most houses and by many companies it is estimated that a switch away from gas will need a 50 % increase in power production.