Just put it on its side.

Leave the grid out of it. Your PV’s charge your battery with DC, that gets used as DC by the USB-PD outlets in your wall. And you have an AC-DC converter for when you need to consume grid power.

FULLY AUTOMATED

I’m guessing they started with Carlin to get all the fuss out of the way up front, so they can get on with doing all the others with minimal outcry.