The battery’s SOC (State of Charge) shows correctly, but it doesn’t synchronize with the inverter and GX (the inverter maintains its own values - visible on the inverter’s display).
When I switch back to the Lynx Ion BMS protocol, the indicators return, but the connection with the Jk BMS disappears…
Using a type A cable (genuine Victron).
The problem, I think, lies in the fact that it connects via VeCan (unlike the Multiplus, which uses VeBus). And when you change the protocol, it starts to recognize the BMS but loses sight of everything else. I wonder if this can be resolved somehow?
The issue is port speed.
The multi is 250kb/s and the bms is 500.
So you can’t have a daisy chain and have to set each port to a different speed, with terminations in both can busses.
You don’t make specific mention of what GX you have.
Do not put the JK-BMS and the Multi-RS on the same CAN-Bus.
The Cerbo GX has 2 different CAN-bus, each have 2 RJ45 ports, so 4 ports in total.
Use one CAN-bus for the JK-BMS (on MK1 Cerbo’s, you must use the “BMS-CAN” bus for this).
Use the other CAN-bus to connect the Multi-RS.
Select different CAN protocols and speed for each bus.
Do not forget to add blue RJ-45 terminators to the 2 remaining CAN ports of the Cerbo, both CAN-bus must have a terminator on each end of their chain, so, in this case :
2 on the cerbo
1 on the Multi RS
1 on the BMS … but it is already built-in inside the JK-BMS
