It goes down a lot because of the high percentage of intermittent renewable sources on their grid. Winds in South Australia get out of parameters - down it goes.
California is starting to have the same problem (with some complications due to lack of power line maintenance). Germany would have it too, excepting for their large imports of French nuclear generation. As it is, German electricity prices are just very expensive.
Interestingly, France has threatened Britain with power cut-offs as part of Brexit. The Germans best take notice.
Once these sources exceed about 10% of the total they effectively make all sources intermittent - and expensive.
Easy enough to go to Our World in Data or eia.gov and plot a simple graph of Renewable percentage vs. Cost per kwh. A scary linear picture.
And all to solve a "problem" that has never been a problem throughout the entire history of the Phanerozoic Eon.
Edited by Jeff Morgan, 03 November 2020 - 01:08 AM.