Ahhh, yeah grid demand response appliances are kinda common here (solar inverters and air conditioners). There’s been a few trials and whatnot of smart chargers installed in homes by grid operators:

https://arena.gov.au/knowledge-bank/origin-energy-electric-v...

And a grid operator has been experimenting with special tariffs that are “free” during peak solar times:

https://reneweconomy.com.au/networks-test-time-of-use-appeti...

You’re right - it wouldn’t surprise me if there becomes a standard for EV chargers in Australia that makes it so they have to be centrally controlled to protect the grid/take advantage of excess renewables. Good to do it now before too many homes install EV chargers (probably only 30-40,000 in the country right now).