Looking a bit more over the PowerHub fact sheet here are some thoughts:
First, look at the specs:
Apparently the 30kWh unit will have a max output from the battery (evening) of 9.6 kW while the large 60kWh unit will have maximum battery output of 19.2 kW. That's a little more than double for the larger unit. These numbers should tell us a bit about the battery configuration, if we can gather more data (i.e. what types of cells with what voltage and capacity, how many in serial and/or parallell to make up that capacity and output combo).
"Storage capacity" is interesting because the 30 unit has "25-35 kWh" and the 60 unit has "50-70 kWh". I don't quite get why they list it like this, while for example Tesla will say that the 85kWh car has 85kWh (not 77-87 kWh for example). The footnote reads: "Extended storage capacity available for limited time periods" - I guess this means they will allow you to use an abnormally large voltage span for "limited periods" but not in the long run, since this will cause faster degradation. What does the "BOL" acronym mean?
Also I'm wondering whether there are some type of thermal management, and if so is this just fans or could it be a liquid cooling system? I suppose these units will be in rough conditions including high temperatures often.
The panels will be Silevo panels - i.e. SCTY is moving forward fast with inhouse manufacturing, taking a page from Elon's vertical integration playbook.
Looking at this picture of the internals, we don't know if it's the 30 or 60 unit we're looking it, but I count 5 Tesla-branded battery boxes. Likely not 7kWh nor 10kWh PowerWalls.