It also seems you haven't heard of the Snowy hydro system that is backing up fossil fuel right now.
What do you think happened when unit 2 crapped it's pants the other day and dropped 500mw off the grid ?
Fossil generation requires significant backup in order to supply power 24/7. Just like renwables do.
Also, it seems you haven't heard of creating ice from cheap excess electricity and then using it for cooling in peak periods. Industry has only been doing it for about half a century now.
