All in One Parallel Functionality

Hi guys

I've had a GE-approved installer round today to quote me for a AIO install, solar and an EV charger. I probably need two 13.5kWh batteries but currently the parallel feature is "coming soon". Are there any hints on when this might be and whether it will mean a standalone unit as an add-on (given most AIO's now come bundled with the Giv-Gateway which I assume you will only need one of for a parallel install).

I don't know whether to hold off in the hope the parallel feature does come soon, or get the main install done with a view to adding a second battery if/when it does arrive.

Nobody knows yet, I had to hold off getting two batteries myself and just hoping they dump the VAT on solar storage.

I was told by an installer yesterday that it doesn't work with the gen 3 5Kw hybrid inverter, do you know if this is so?