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hr342-owner asked

BMV 712 / Cerbo GX / NMEA

I have a BMV 712 installed in my yacht. It works perfect, I can see all data from both batteries. And I have a Raymarine Axiom+ as a MFD. My plan is to see all the battery data on the MFD, too. I connected the BMV712 to a Cerbo GX with VE.direct and then the Cerbo GX with VE.can to the NMEA/Seatalk bus (adapter). I can see the Cerbo GX as a device on the MDF, but no battery data is transmitted. What is wrong with my setup?

(Cerbo GX needed to see all data from the solar panel and the wind generator, not connected yet)

cerbo gxBMV Battery Monitor
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Stefanie (Victron Energy Staff) avatar image
Stefanie (Victron Energy Staff) answered ·

@HR342-owner,

make sure you have read the Raymarine MFD Integration Guide

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hr342-owner answered ·

I read the article. According to the article, there are two possibilities: Raynet Ethernet and NMEA2000. The wiring is easier for NMEA2000 in my case, hence my choice. I have also read the article "NMEA 2000 & MFD integration guide". I tried for example with and without terminator, nothing helps.


I see the Cerbo GX in the list of connected devices on the MFD. The Victron APP does not find the Cerbo GX, so I guess it only works with the Ethernet solution. However, I want to display the data without the app, normal MFD screen together with other data that I do not receive via the Cerbo GX.

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ commented ·

The HTML5 app in your Axiom+ will only work on the Ethernet connection. Since the Axiom+ does have only one Ethernet port, which in most cases is already occupied by other devices like wired Quantum Radar or remote control, you will need a HS5 Raymarine Network Switch to expand the number of Ethernet ports..


To display the data from your Victron devices (they are on your N2K network now) you need to tell your Axiom (and other MFDs like i70 displays) which of the data to show. See also the Raymarine manuals how to change those settings.

Here is a video (in German language) about that part. It's for a SmartShunt, but the basics are the same:

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hr342-owner avatar image hr342-owner Stefanie (Victron Energy Staff) ♦♦ commented ·

For the HTML5 app from Victron, I will buy the Ethernet cable (I have already installed an Ethernet switch). But that is not my main goal

I had seen the video before I installed the devices. But here we have a different shunt than me (500 to 712). I go from the 712 to the Cerbo GX.The reading on my Axiom for battery 1 (main) and 2 (starter) is the same as battery 2 from the video, which means I don't see anything.

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ hr342-owner commented ·

BMV712 or SmartShunt doesn't matter.

BTW, if you speak German, OT would make things probably easier.

Did you check in network settings in the Axiom that the PGN 127508 for both batteries are received by the MFD? Did you check that data instances for both batteries are unique in your system? If you have a MPPT in your system, it claims the same data instance (because MPPT voltage is reported as battery as well).

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hr342-owner avatar image hr342-owner Stefanie (Victron Energy Staff) ♦♦ commented ·

Machen wir in Deutsch weiter. PGN 127508 sagt mir erst einmal nichts. Ich habe beim Axiom 2 Batterien eingestellt. Im Axiom sehe ich unter den Netztwerk devices das Cerbo. Egal welche Option von Batterie 1 oder 2 ich mir am Axiom anzeigen lassen, immer bekomme ich keine Daten angezeigt (Verhalten wie bei Batterie 2 im Video)

Am Cerbo hängt aktuell nur der Shunt 712. Im Handbuch des Cerbo GX wird auf Seite 5 schon auf Unterschiede zwischen den verschiedenen Shunts hingewiesen.


Solar bzw Wind sind aktuell nicht vernetzt

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hr342-owner answered ·

Danke. Bin nun wieder auf dem Schiff gewesen. Update auf Firmware 2.85 hat geholfen, jetzt komm ich an alle Daten.

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