VE-direct as single interface to the Multiplus II GX

Q&A and troubleshooting
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1

Currently my Multiplus-II GX is connected to the Energy meter via MQTT and to the BMS via USB.
But I’m wondering why two communication paths are needed, could it not be all connected via one port, for example VE-direct bus.

I can find information about reading the status of the Multiplus II via the VE-direct bus.
And I see some people using it as interface to the BMS.
But has anybody tried to send the energy meter values via the VE-direct bus to a Multiplus GX?
I could not find it in the VE-direct information on the Victron Webpage.
Is this possible? If so, any tips how to do this?

2

Ve.direct is not a bus, but a point to point communication

3

Check, so I need to make a single electronica board that collects all my information and send that via the point to point communication to the Victron.

But can I send via this point-to-point communication also the energy meter values to the Victron?
I do not see that in the VE-direct datasheet.

4

As no existing meter supports ve.direct
…i guess no.

5

But ofc you can connect a usb hub and connect usb to ve.direct adapters.

6

I see on https://www.victronenergy.com/upload/documents/Datasheet-Energy-Meters-Selection-Guide-EN.pdf that there are Victron energy meters communicating via RS485, are they then all connected via RS485-to-USB connections?

7

Rs485 is actually only the physical connection, the data could be any kind of bus like can, ve.can, ve.bms, tcpip, nmea or whatever

8

Indeed
But with a bit of programming it should be easy to convert the data I have to the right format, such that the Victron thinks it is an energy meter.

Is there somewhere information what kind of data-commands/registers I should use to make the Victron recognize the values as “Energy”, “voltage” etc?

I see that there is also default support inside the Victron for the ABB B21/23/24 meters. So maybe I can fake my setup into pretending it is one of those?

9

I found some hints by others here:
https://communityarchive.victronenergy.com/questions/111121/emulating-em24-ethernet-meter-via-modbustcp-server.html

10

Sorry i live offgrid, so i have no information for this kind of application.