Documentation tells me that only ONE (1) VE.Bus network can be managed by a Cerbo GX. This single VE.Bus network may contain multiple IDENTICAL inverter/chargers provided they are synchronized as a single “system”. But only ONE (1) VE.Bus network/system per Cerbo GX, despite TWO (2) RJ45 input ports. However, my very limited Google AI research suggests that IF Venus OS LARGE is enabled during firmware install, that the Cerbo GX (and perhaps a x86 mini-PC running Venus OS LARGE even more-so) may be capable of monitoring, managing, and controlling multiple VE.Bus networks, regardless of different inverter/chargers each operating/reporting on a different VE.Bus network. I have THREE (3) MultiPlus IIs and ONE (1) MultiPlus on my boat, so I am highly motivated to consolidate monitoring & control. Is there anyone in this helpful community, or a Victron Tech moderator, who could please clarify this for me, and perhaps point me in the right direction for a solution??? I sincerely appreciate any/all input, and I apologize if my newbie post is not properly constructed.
You don’t need Venus OS Large installed to run more than one VE.Bus inverter group. But, maybe you do for more than two groups, which is my experience. I don’t think so, but I can’t say for certain. If you have two different VE.Bus inverter groups attached to the same battery bank, then you can even use DVCC to control both inverter groups. We have a large (by Victron standards) project where we are using two large VE.Bus inverter groups. This is supported as of recent Venus OS versions.Last weekend I tested this using a three-phase system that runs my shop. Have fun 
What excellent news. Thank you for the hope of simple solution. If not too bothersome, (at your convenience), could you please share more details of your total system, and the degree & manner in which the system is reported/controlled? Do you rely entirely on the Cerbo GX and GX Touch, or do you also use a Windows based PC with VictronConnect, or even VE.Configure? I apologize if this sounded too much like an interrogation… I am just (now) optimistic and anxious to install my system. I will be certain to post my results for the community’s benefit. Thank you again. Is there anyone else out in the community with similar experience? Our collective stories may rewrite the manual as to what is possible.
Hi, how to connect a second VE.Bus system is explained the Cerbo GX manual.
And the recent DVCC related improvement that @OGPS refers to is explained here: public - Venus OS v3.60 Release - Google Slides . Look for the slide(s) on “BMS control for MK3-USB connected …”.
success, and make sure to consult the manuals a bit on top of AI.
Does this mean the following is now possible?
Using a single Cerbo GX to monitor (and control via Node-RED) both the propulsion motor and battery as well as the house battery and AC loads in/out. With the propulsion battery selected as the primary battery in use for the boat page display (SoC% and time-to-go) and the motor smartshunt and/or Sevcon CANopen integration for motor data live feed (and USB GPS mouse for speed).
I believe this should be possible even though the MultiPlus II is dedicated to charge the house bank only and to provide AC power onboard.
I have forked the rest of this question to its own topic: Electric boat, propulsion and house battery, Cerbo GX monitoring and MP II AC power supply
Another super-helpful, and life-lesson response. I have been very faithful updating my firmware at every new release, but apparently negligent about updating my Owner’s Manual. All of my manual research was 2-years old. I have learned my lesson, and downloaded the most recent publication from the website (JUL-2025) and will be carefully reading it today. Additionally, I have downloaded your suggested slide presentation, and will give it the same close study. For the last few years I have been migrating from the Xantrex ecosystem. Not to throw stones, as there were many things I liked about their inverter/chargers and controller, but Xantrex offers NO provision for firmware updates, or system/manual feature improvements. They have been frozen in time for the last 14 years regarding the Freedom SW series. This is what attracted me to Victron: the CONSTANT innovation, enhancement, and improvement; and the phenomenal customer support & transparency. I am a huge fan, and embarrassed that I did not think to search for a more recent Cerbo GX manual. I appreciate your gentle & courteous reminder to my bone-headed oversight. Well-done, sir. After digesting all of this new information (and any other community comments on the subject), and completing my install (it is involved, so may take several weeks), I will report back for the benefit of the community at large. Again, thank you very much!
Now why would you say that ?
You still need to use VE.Bus System Configurator (or VictronConnect if a simple system) to configure the different inverter groups according to their phase and parallel requirements and VEconfigure to configure settings, assistants, etc. on the inverters themselves. Once configured, one VE.bus inverter group is connected to the internal MK3 VE.bus ports on the Cerbo and the other VE.bus inverter group is connected to a MK3-USB interface that is connected to the same Cerbo GX via a USB port. My configuration uses a common battery bank for both inverter groups and hence can leverage the new DVCC settings in 3.6x for both inverter groups.
@mpvader The VE.bus inverter group connected via a MK3-USB doesn’t appear to follow CCL from DVCC. We have a customer that has specifically requested to use Victron products (yay!) for a solution to clean up sometimes dirty grid power to power some sensitive equipment. They opted to forgo a dedicated power conditioner with UPS in lieu of Victron. So we have designed a system that uses 9x Quattro 48/10000-120V in a parallel three-phase configuration in inverter-only mode (VE.bus group 1) and another 9x Quattro 48/10000-120V in charger-only mode (VE.bus group 2). We’ll start with 27x 5kWh batteries and both VE.bus groups will be connected to this battery bank.
Question 1: In this case, it would seem to be better to connect the charger-only group to the internal VE.bus ports on the GX device to leverage CCL control. Is this correct?
Question 2: Will full DVCC (include CCL) control be added in the future for devices connected via a MK3-USB?
Question 3: In the future, will it be possible to add both VE.bus systems to the overview display on the GC device?
Thank you!
Ahoy MPVader,
Just completed an informative read (x2) and hope you can clarify a few things that I am sure are obvious to anyone more experienced with Victron than myself. 1) In connecting more than one VE.Bus system to a Cerbo GX (using either the MK3-USB or the VE.Bus-VE.Can interfaces) is only ONE additional system permitted? or is there a higher limit depending on the interface method used? 2) Can BOTH interface methods be used simultaneously to the same Cerbo GX if THREE total VE.Bus systems are desired? 3) Are the same limitations and exclusions delineated with the MK3-USB Interface, also experienced when using the VE.Bus-VE.Can interface? 4) I understand the VE.Bus-VE.Can interface is discontinued. Is that because of performance/stability problems, or just financial/market-driven decision? Lastly, 5) Regarding “Additional features provided by a GX device to VE.Bus products when connected to the internet”: Do these additional features apply to ALL VE.Bus products connected to the Cerbo GX by any/all means? or only those devices connected directly to the Cerbo GX VE.Bus port, but NOT those connected by MK3 or VE.Can interfaces? Thank you again for your expert insight. I am very anxious to get this project sorted out. I deeply appreciate your help (and, of course the generous help of all community members who also share their insights).
Ahoy Ed OGPS,
Another awesome post with great questions. I am anxious to read MPVader’s response. This is quite an education for me, and I am sincerely grateful.