Multiplus2 will not turn on when connected to ve bus on cerbo

DIY
, ,
1

i have a multi plus 2 when i connect the ve bus to cerbo gx the inverter will not turn on. if i connect ve bus after turning on all is ok untill i turn multi plus off then it will not turn back on untill i disconnect cable

2

Check the switch setting of the multi in the cerbo:
Setting in remote console
If there is “Off” selectrd, the multi doesn’t turn on

3

The switch setting is on, if i turn it off I cant turn it on again

4

Maybe your issue is:

https://www.victronenergy.com/media/pg/Cerbo_GX/en/installation.html

If you power the Cerbo GX from an AC adaptor connected to the AC-out port of any VE.Bus product (Inverter, Multi or Quattro), then a deadlock will occur after the VE.Bus products are powered-down for any reason (after any operational fault or during a black start). The VE.Bus devices will not boot-up until the Cerbo GX has power …but the Cerbo GX will not boot-up until it has power. This deadlock can be rectified by briefly unplugging the Cerbo GX VE.Bus cable at which point you will observe the VE.Bus products will immediately begin to boot-up.

If so, either feed your cerbo from the battery, or purchase a dedicated micro-UPS for the cerbo. (few bucks on amazon) I did the later, because my Batteries are not discharging without BMS communication, so directly attaching the cerbo to the battery does not resolve this.

1 Like
5

I am experiencing the same issue. I have a MultiPlus-II 15000 connected to a Cerbo GX with a CAT6e cable. I cannot switch ON the MultiPlus-II with the VE.Bus cable connected. The moment i disconnect it VE.Bus cable, it turns on.
I am running the latest firmware on both the Cerbo and the MultiPlus-II.

How did you resolve this?

6

Me too. My MultiPlus-II was working fine with the GX device connected via VE.Bus for 5 years. Then one day it would not switch on unless the VE.Bus connection was unplugged, then I could replug it and everything is fine. I since replaced my Venus GX with a Cerbo GX but the same thing happens.

I think back to what occurred between it working and not working. The only thing I can think of was that the battery protect had kicked in with a low SOC when my boat was laid-up and I had to recharge the batteries to bring everything back up. Why this behaviour continues, I do not know…