Gen 3 base cost vs competition

Ive been trying to get my head around what the 30% cost reduction will mean in $$ for the Zbm gen 3 and how that compares to lithium currently.
So starting with uninstalled cost.
An Australian website 'solar quotes' lists the 10kw zcell at $12600. I cant remember if the zcell is just a rebadged zbm but im going to assume that it is. (Im also hoping this isnt a recently reduced gen 2.5 model run out price)
Back of the envelope 30% reduction gives us $8820. Now i know theres probably a few costs involved that wont reduce the overal cost by 30% , shipping , sales etc.
However the Tesla powerwall 2 according to Solar Choice (aus) in April 2019 was priced at $9600 for 13.5kw.
If the gen3 does come in under the price of a powerwall, then i think we are in pretty good shape given the advantages it has in a range of scenarios.