Not sure if this will help. I have a Sunsynk 5kw inverter connected to a Magneto 5 kwh suoer cap battery. I got the BMS settings to work as follows
1. dip switches left at default
2. connected ethernet cable from inverter can / rs 485 port to battery rs 485 port
3. on battery config set battery to lithium.
4. On battery config set RS485 selected
5. On battery config set protocol to 12