Don’t get me wrong, the PowerWall has been great for the last 4 years, It is just that the subcontracting technicians didn’t want to do any more work than the bare minimum, even though it was negligible extra effort.
That said, since Musk has severely gone off the rails and still has controlling interest in the Company, I would be hesitant to trust anything that comes out from the North American operations.
The problem is that all the other aftermarket battery backup technologies (that I know about from 3 year old research) are either inferior to the PowerWall in every way, or need to be manufactured bespoke for the Australian market.