Your reply above :
Master battery:
PIN 1 - ON
PIN 2 - OFF
PIN 3 - OFF
PIN 4 - OFF
Slave A:
PIN 1 - OFF
PIN 2 - ON
PIN 3 - OFF
PIN 4 - OFF
Use a normal cat5 / computer network cable and connect the right side RS485 (2x RS485 ports together) to the next battery pack. The CAN will double up on th AH charge/discharge and your battery AH will double up.
Question:
Does this apply to the Hubble batteries X2 on a Victron inverter as well.