Dear community, the I have a JK inverter BMS and a Cerbo GX which cannot communicate. I do not see the BMS in the device list. I am using the original type A Victron cable. I do not see any TX or RX packets when they are interconnected using the BMS-CAN port. I have confirmed and the CAN port i…

Is the jk inverter bms set to talk “victron”-can?

Did you use the second RJ-45 connector on the JK BMS? Some versions of the documentation have the first two connectors (RS485-1 & CAN) swapped. The correct cable to use for the JK inverter BMS is the type B cable, but the type A cable also works as the ground connection is not required.

Good Morning Dirk, I use the second RJ-45 connector [WhatsApp Image 2025-02-11 at 11.34.35_499f782f] So far I have tried type A, but will also try type B. On the Cerbo, should I use the BMS-CAN or VE-CAN Port? If VE-CAN, which baud rate?

[image] Thanks for the hint Marc, the correct proto is 4

You should use the BMS-CAN port set to 500 kbit/s. And I suggest using using a terminator at the Cerbo side. Protocol 4 is OK.

Cerbo GX BMS-CAN - JK Inverter BMS not visible

DIY

kamen (Kamen) 12 February 2025 06:22 4

Type B Cable also does not work. I have tried the BMS-CAN (no Tx and Rx), VE-CAN (Tx and RX when set to 250), no Tx and RX when set to 500. I also tried the first port of the BMS with all combinations.

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Cerbo GX BMS-CAN - JK Inverter BMS not visible

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