I want to do the same bit i can only use 2 usb ports on the Cerbo. How did you do it?
@Sten I know this post is rather old, but curious how you wired up your RBS.
Do you use the relay in the Victron system to provide a pulse with power from the busbar / battery to turn it off in case of for example smoke detection?
The relay can be programmed to different situations.
Take a look in the manual.
my REC BMS is controlling the relay with one wire Mode 4.