we know the problem when connecting VE.direct without isolation e.g. on a Venus Raspi system (when e.g. JK interrupts B-/P-, power from SmartSolar may (try to) flow over VE.direct ground)
Now I’m asking myself if it is safe to connect BMS CAN of a JK BMS PB series to MultiPlus II GX without isolation?! (CAN_hi/lo + Gnd)
In the manual of the Multi GX nothing is mentioned regaring isolation of the BMS CAN interface. In the Cerbo manual “1 x VE.Can (not isolated) and 1 x BMS-Can” is written, what makes me assuming that the BMS CAN is isolated.
Is it isolated in the Multi GX also?
thank you very much & greetings!
Phil
guystewart
(Guy Stewart (Victron Community Manager))
2
I checked the linked page but can’t find any info regarding isolation of the BMS-Can port. The only thing mentioned that “Late 2021 / early 2022, … MultiPlus-II GX … update … changes the CAN-communications port from a limited 500kbps BMS-Can only type to a full featured VE.Can port (non-isolated).”
But today there are two BMS-Can sockets and no VE.Can (according to the manual).