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bluelghtning avatar image
bluelghtning asked

Multiplus 12v/3k restarts every 30 secs with VE.Bus BT dongle plugged in

I have a new one I haven't ran into before. A Victron Multiplus 3k in inverter mode with a smart VE.bus BT dongle plugged in causes the inverter itself to restart every 30 seconds. The inverter is just on, with no loads and green inverter light is on saying everything is fine. Every 30 seconds the invertere restarts by itself There is no shore power, it's just inverting. There are 3 Battle Born batteries the inverter is hooked to and the battery voltage is fine since there is no load or anything.
If you unplug the VE.Bus BT dongle the rebooting stops. I can hook up to the MK3 to the inverter/laptop using the exact same cable and everything is fine. The culprit appears to be the VE.Bus BT dongle, but I've never seen this before?

Components:
- Victron Multiplus MP1 12v/3000 with latest firmware
- Victron VE.Bus BT dongle with latest firmware
I swapped out the network cable (both are from Victron)
I tried both RJ45 ports on the Inverter
Restarted both devices
As long as the VE.Bus BT dongle is plugged in, the inverter reboots every 30 seconds. If you unplug the dongle, everything is fine.
multiple invertersVE.Bus Smart Donglereboot
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2 Answers
Justin Cook avatar image
Justin Cook answered ·

Hi @BlueLghtning , welcome to the Community!

The first thought that comes to mind is that you may have the VE.Bus Smart Dongle's power supply wires connected to the DC I/O connection bolts of the MultiPlus and/or have the Dongle itself placed in or on the MultiPlus - is this the case? If so, please remove them and connect the VE.Bus Smart Dongle to the battery terminals and mount the Dongle to the batteries as specified in the user manual.

If the Smart Dongle is installed correctly, however, and the issue persists, please post additional details including photos of the installation if possible, as well as the FW version of both the Dongle and the MultiPlus, and we'll see if there's any additional troubleshooting that we can offer!

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Matthias Lange - DE avatar image Matthias Lange - DE ♦ commented ·

Why should connecting and placing the dongle at the MultiPlus cause such a problem?

I installed it that way a few times without a problem.

I had a similar problem 1 or 2 years ago, but if I remember correctly there was a VE.Bus BMS and GX device involved and the customer wanted to use the internal remote contact of the MultiPlus 12/3000.

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william-wright avatar image
william-wright answered ·

Hi, did you ever find the solution to this?

I have the same issue, I have wired up a VE.BUS BT Dongle to my Multiplus 12v 3K. The dongle is wired up to the main bus bar, not in the inverter, I have updated the software on both to the latest using the VE.BUS to USB dongle and I have even bought a Victron RJ45 cable and still have the exact same issue.

It will all boot up and work but will cut out about every 30 seconds and reboot. You can see in the app through the dongle that it is as soon as it has got all the information (going from unknown to then give the inverting/battery details) as soon as it is showing the details it cuts out about 3 seconds later and goes through the same process again.

Don't know what else to try, might it be a faulty dongle as the Multiplus works fine without it?

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