@SiliconKidI find your resilience and solutions very practical. It is a real pity I only discovered this group now - perhaps too much of the old-fashioned thinking. I have two of the inverters that you have (Paralel) and 3 of the Pylontech US3000C Batts. I believe I have done just about everything you suggest and the comms is working perfectly with the BMS on the master batt with correct Dipswitch settings. My challenge is my batteries show full on SOC indicator bat the Inverters only “see” 85% and never goes beyond. Then when it reaches 53% the system switches off - please note this is a complete off the grid set-up. It seems like a “setting issue”, but there are no “settings” to rely on if you want the “intelligence” of the BMS to do its work….which implies the settings are “hard-coded” in the BMS….
It is either that or the two inverters in parallel is confusing the BMS - it does not know which inverter to obey….
All of it speculation though … any words of wisdom or advice that may guide me in the right direction.
PS - I have mr Amos Yang of Growatt in constant contact, he is extremely helpful but my problem persists.