VE Bus Error 10

DIY
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1

Since last week, I’ve had a remarkable problem with my installation. The installation consists of:

  • 3x MultiPlus-II 6K5 inverters
  • 3x JK-BMS with 16s ~360Ah cells.
  • 2x MPPT 150/45
  • 1x Victron EVCS
  • 1x SolarEdge SE6K inverter, AC-coupled
  • Cerbo GX

The installation has been running as it should since March. I use DESS for trading, so the setup gets a lot of use. The installation is allowed to charge and discharge at 300A.

The problem is as follows: when the inverters are running at low load, there’s no issue, but as soon as the installation charges or discharges above ~80A, I get the message: VE.Bus Error: VE.Bus Error 10: System time synchronisation problem occurred. I’ve already replaced the Ethernet cables between the units and to the Cerbo with other shielded cables. This made no difference. After that, I updated everything; all the software is now on the latest version. Of course, I’ve also checked whether there’s a DC dip, checked the fuses, and grounded the units using the earth connection rather than only the AC-in connection. None of this made any difference.

Everywhere I look, it says this error mainly occurs in combination with other errors, but that’s not the case for me. Is there a way to monitor the bus data? Or another way to find out which inverter is causing the problem? I’ve had all the units in a single-phase configuration, and then there’s no issue.

What else can I test?

2

Good afternoon,

Did you check the input and output neutrals connections, that these are all connected to 1 point for the inputs and another point for the outputs, is the phase rotation on the output correct towards the grid rotation?

Regards, Jeroen.

3

Good morning,

I checked just to be sure, and everything is correct. I’d like to find out which inverter is causing the issue. Can I also test two inverters on two phases using the 120-degree phase difference option? Or is this setup not intended for the Netherlands?

4

Good afternoon,

Yes you can use 2 phase, but you can also make a different master to try, sometimes it solves the issue.

Regards, Jeroen.

5

Good afternoon,

Adjusting the master didn’t help, but using the two-phase setup I was able to identify which inverter it was. Thanks for your help!