I'm designing my future system and wondering whether I need a (Cerbo/Venus/?) GX control device in order to set the Quattro to use the batteries (and solar panels) as much as possible, until they reach a given threshold (50%) when the shore power takes over. (and ideally if/when the inverter can't keep up)
All the guides I've seen so far call for an ESS system which requires a GX device, but it seems to be a rather straightforward setting that I should be able to set with the USB interface which hopefully works on Linux.
The charger would barely ever be needed so I don't need a straightforward interface to it.
I've attached a diagram of the current state of planning below: