You can look up the details of what a home charger needs to do to get UK government funding support. I'd imagine Australia will follow suit.
https://www.gov.uk/guidance/regulations-electric-vehicle-sma...
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).