I’m running a BYD battery (via Solaredge inverter) in addition to a 3 phase Victron ESS with 30kWh Pylontech batteries.
See here: Victron MPII’s with Solaredge and 2 batteries - DIY - Victron Community
I’m controlling the BYD via the Solaredge inverter, which in turn is connected via MODBUS TCP to Home Assistant. Works well 