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South Australia is 70% renewables, as per their own official energy site.
Batteries are the limiting factor for renewables. Building battery storage that can supply a large city is expensive. Even the battery South Australia had Elon Musk build can only supply a town for about an hour. I’m hoping battery tech improves soon, but it seems to have stagnated for a while.
That’s interesting, I’m an EE but in industry atm. I’d like to look into that whole scenario one day and see how much storage we’d need to go fully renewable.