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 th…

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.

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?

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…

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

@RoelofH Hi. Managed to fix it? I could not find, so I’ve opened a topic. [image] MultiPlus-II GX integrated / controlled with Arduino ESP32 DIY @DirkW I have solar panels. Also, some water boilers controlled with analog SSR by ESP32. So, idea is to use on…

I now made a code to mimic the EM24, by just using the exactly the same registers. And putting my data in those registers. My implementation uses the ESP8266 in just C code (so not via HomeAssistent). The Victron Multiplus-II GX recognizes my ESP8266 now as an EM24 and acts on the data. It works v…

Ok. So, yes, you have it. As ESP8266 is ESP32 (or vice-versa), then I should understand all of the code and almost implement 1:1. I already have the meter data on my ESP32. I use it to heat water for shower and central heating. That works lovely for more than a year. But still there is extra energy…

More details were by accident discussed/added in one of the other discussions. See: [image] Oscillating behaviour at max charge current DIY I used an ESP8266 as processor which determines the energy used in my house and sends that data via ModBus protocol ove…

[image] Viorel_C: GX settings And related to the GX-settings. I did not have to do anything special accept turning on the ModBus. After a short scan it will find the Em24-clone. Or you have to add the IP adres of the clone if the scan is not working.

VE-direct as single interface to the Multiplus II GX

Q&A and troubleshooting

RoelofH 24 January 2026 13:05 14

More details were by accident discussed/added in one of the other discussions.
See:

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VE-direct as single interface to the Multiplus II GX

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