Hello, I have 2 Hakadi battery boxes 48V 280 Ah I’d like to connect to the cerbo. There are 3 RJ45 connetors on the front pannel labelled “RS-485” X2 and one “CAN”. I received a RS-485 to USB adaptator.
What is the best way to connect the batteries to the cerbo? The batteries are connected in parallel.
Great thanks for your help.
Greetings from Belgium.
Camomille
I would recommend CAN. Take a look in the BMS configuration app if you can enable Victron protocol on the CAN port. Then set Cerbo CAN to LV battery. You need a special cable, there are Type A and B pinouts available from Victron, or crimp your own. Make sure that the pinout is correct, and it should detect automatically. A regular RJ45 cable won’t suffice. You only need to connect the first battery to Cerbo.
AFAIK using RS485 would require using a serialbattery driver, which you need to install on the Cerbo. It’s a bit more involved process than CAN.
Hello,
I set CAN Inverter on “VCTR” and tried connecting with a homemade cable today. Nothing happened. I have now ordered 2 Victron CAN cables type A and will try again with more trustful material 
.
Great thanks for your answer and sorry for the late reply.
Greetings from Belgium.
Camomille
Everything is now OK. I’m not proud since I used the “VE Can” instead of “BMS Can” 
Both battery boxes are connected and displayed as one single device. Values from both boxes are alternatively displayed.
Thanks again.
Greetings from Belgium.
Camomille