Australia’s solar market is un-price-gougey enough and electricity costs enough that I don’t think anyone would really consider not putting solar on a new build with a battery ready inverter. An investment that yields 50% return in the first year is a no brainer.

Virtual power plants seem a bit too silicon-valley. I don’t see anything wrong with a bounded variable time of use/feed-in tarriff (ie. Electricity will cost at least x, at most y, time-average z over the year, you get 30% of retail for feed-in and the prices are published day ahead). Let people own their own charger, inverter, and battery and decide for themselves what thresholds are for the controller (or opt into software).