The Growatt online seems to have its own LifePO4 lithium batteries, but from my research you can use it with Pylontech or other Lithium batteries but for system parameters you may have to use “User” for battery type and I’m not sure how receptive the Growatt is to the BMS of other battery types, other than its own.
If you can find some contacts in the Aussie market, it may help.
-Moffat