system integration Image

system integration

Cerbo GX and multiple relay control

It seems to me that the Cerbo should be able to control the relay's of all the attached Victron devices. In my whole system, I must have 5 unused relays that could controlled and managed from a central device and ruleset. You could do a lot between the data available in the system and a complete integration of all those relays. For example, currently to start an onan genset we need a couple extra timer relays, or a genset control unit. But we have all the data and relay functionality we need in even a small system.

Battery below 20%, trigger Genstart sequence

1. Cerbo, close relay 1 for 10 seconds (prime genset)

2. Cerbo, command Multiplus to close relay for 10 seconds (start genset)

3. Cerbo, does multiplus detect input voltage? If no, repeat 2x.

4. Cerbo, battery 95%, close relay 1 for 3 seconds (stop Genset)

This is a very simplistic operation, but a good example of something the system should be able to do. Integrate other devices like the relay on the solar controller and dc/dc converter and all the other devices in the system, and you could do some wild stuff. Especially with a little program that would let you write and upload rulesets.

Anyone have a hack that will allow me to do this?

mutt2jeff asked
JohnC answered ·

1 Answer

Installed VE.Bus Smart Dongle but Multiplus does not show up

I have a Raspberry PI setup that runs Venus OS and connects to my Ruuvi sensors and MPPT charge controllers (via Bluetooth and, respectively). I have a MultiPlus 12/3000/120-50 120V that I want to connect to the system so I bought a Victron VE.Bus Smart Dongle.

I just ran a standard UTP RJ45 from my engine room where the MultiPlus is located and connected the ethernet cable to the Dongle and the Dongle to the battery bank directly. The Victron Connect app on my phone allowed me to add the device to the network as a Smart Dongle but the Inverter doesn't show up in the system. VRM online doesn't show any devices. Venus.local doesn't show the device.

One other note: Firmware was updated from 1.07 (I think) to 1.13. I am transmitting battery voltage and temperature.

I was under the impression that I would use the Smart Dongle to see and control the inverter. Please let me know what I need to do to make that happen. Thank you.

sailorzach asked
sailorzach answered ·

1 Answer

Victron Energy IP22 12V/20 (3)

Hello to you all. I read some posts over here according the Victron Energy IP22 12V/20 (3). But I can't find one that fits my needs/question. Hope some of you know.

I have 3 batteries (105A) . All 3 are the same. I now am charging them individually through the 3 ouputs theVictron Energy IP22 12V/20 (3) has.

I now want to use 2 of these batteries parallel, giving me 210A. Can you tell me how I have to setup the V Energy with this new configuration. Can I still use all three outputs to supply each battery individually? Or do I have to use 2 outputs: *1 for the standalone battery and *1 output to connect to the both parallel configuration?

Hope I made myself clear (From Dutch to English) Thanks and I am looking forward to your replies.


cuevision asked
kevgermany commented ·

2 Answers

Third party product integration into Cerbo GX?

Dear VE community,

recently, we have received quite a few requests for the integration of our serial product (a BLE-based gas scale) into Cerbo GX. We have identified that some similar products (e.g. Ruuvi Tag, Mopeka Pro) are supported by Cerbo GX, so my question is what the procedure of integrating a third party product into Cerbo GX is? Also, how one can achieve a support for their product directly within Venus OS?

Thank you for your support in advance.

Best regards,


mf-senso4s asked

0 Answers

Can someone export the iobroker Modbus register specification export for venus?

I think many people integrated iobroker with venus to read out values. Can someone export the modbus register specifiation in iobroker, so that is easily imported into iobroker again?

carsten2 asked

0 Answers

Hydrogen fuel cell integration with Victron?

Hi All,

Currently I am working on a project that requires some function

A brief process flow is as such,

1) 12V 100Ah AGM battery is supplying power to a load.

2) Upon detecting voltage low, fuel cell will start charging the battery and at the same time, provide power to the load.

3) Once the AGM voltage is raised back, fuel cell will cut off and back to step (1).

You can think of the fuel cell as a DC power source.

Are there any products that is able to fulfil something like this?

meng-seng-tan asked
kevgermany answered ·

1 Answer

Which Inverter is best For Me?

I am Manager at online psychiatrist near me, we need to setup Inverter for our office but don't know which is best and suitable for us. Please expert guide me which inverter should we use?

Robert Smith asked
gazza answered ·

2 Answers

AC Coupled Fronius excess to activate over heat command to heatpump

I have a Cerbo GX with a DC Coupled SmartSolar MPPT 250/100 (VE Direct), an AC Couple Fronius Primo 8.2-1, and am waiting for my Multiplus II 48/10000/140-100 230V. Batteries are 9 x US3000C Pylontech providing nearly 32kWh connected to the Cerbo GX via CANBus.

I recently installed a large Samsung Heatpump/Aerotermia which provides hot water and central heating. This Heatpump can accept commands via relays or Modbus to increase the heat of the water and central heating (when activated) by some 5ºC when excess solar is available to avoid or reduce night power draw from the grid.

The question is how do I configure or set this up?

On the relay side, it requires two relays which would work with the following commands;
Relay 1 Relay 2 Heatpump operation

closed open forced thermo off operation

open open Normal operation

open closed Heating/DHW setting temperature 1 step-up operation

closed closed Heating/DHW setting temperature 2 step-up operation

Can I use the 2 relays on the cerbo GX for this operation or would MODBus be a better option as I plan to incorporate a Genset to this later?

ponzoa asked
Nico Bayer commented ·

3 Answers

System Alarm Grid Lost

For a few days now we've been getting a system alarm that says "Grid Lost." I can highlight it on our CCGX screen, but it doesn't go away. (I.E. The warning triangle in the top of the screen keeps flashing no matter what I do.) It also does not register on the VRM site under Alarm Logs...

We have not lost grid power once in this time period.

I do however use the CCGX's relay and it's automatic Generator on/off rules to tell the Quattro when to pull power from the grid. (I do this so we can use the energy stored in our batteries first.) So while the Shorepower meter shows zero, we are still connected to the grid.

We also have a PV inverter connected to our Quattro's 230v output, which gave me a grid error once, but I've not seen that happen again. (Meaning it might have but then went away before I noticed it...)

Did something change in the firmware to cause us to get this alarm?

We were running 2.51 but it also happened when I updated it to 2.52.

Thanks to anyone that can help!


scottnelson asked
nickdb commented ·

4 Answers

Looking for professional system designer to help with EV Refit of a 48' Motor Yacht


Looking to hire/collaborate with a system designer who has previous experience designing a system for a motor yacht or sailboat. It can be globally based. We can collaborate over the internet using I've created a rough diagram of my idea.

Please find my diagram here:

I've posted the job here on UpWork where you can define your hourly rate for this job and get started right away securely:

Looking forward tow working with you :)

D S asked
safiery commented ·

1 Answer

Can I add victron datafields to my Simrad/Navico plotter?

Can I add datafields from Victron GX to the infobar on right side? I would like to have voltage value and solar PV charger value. Other NMEA2000 equipment can be implemented in the sidebars.


trulsla asked
jihouni commented ·

7 Answers

Adding extra MPPT and Inverter to EasySolar 24/3000

Hi Everyone, this is my first post here, hopefully, I can find some answers to my questions, any help is appreciated.

I am looking at installing an EasySolar 24/3000/70-50 MPPT 150/70 as this seems to be a very economical system to get started with, but am wondering if it is possible to expand this system easily in the future or not? as this will determine if I go with this initially and then expand as required later, or, use independent components to allow for easier expansion later.

Will it be possible to add another MPPT, and, of a larger size? - Blue/Smart Solar 150/100 for example.

Also, is it possible to add another inverter? - A Phoenix 24/3000 for example.


jessebill asked
kevgermany commented ·

1 Answer

Cerbo GX - Temperature activation of relay.

Greetings All , Question is . When using a Venus GX or Curbo GX . I need to activate one of the relays based off one of the Temp Sensors plugged in to the Venus or Curbo . I can get an alarm via the VRM as well as an email notification and that works fine but I need the relay on the Curbo to be activated . This is to enable a backup system for the refrigerator . Any advice would be great if this can be setup .

Stephen Phillips asked
northtown2022 answered ·

8 Answers

API for Bluetooth 500 Smart Shunt access

I see where there are a lot of options for accessing devices with other systems, but I cannot find anything for the Smart Shunt (500). It doesn't appear to work on windows at all, and the linux version of Connect seems to require a GUI. I was hoping to integrate battery monitoring with other aspects of an astronomy system, for example to get an alert if the SOC drops below some threshhold, park the telescope, shut down gracefully.

Is there any mechanism for programmatically accessing its data via Blue Tooth, on Linux (preferred) or Windows?

It is standalone, not part of a larger system of Victron devices (well, I have a Victron charger but it will not be with the telescope in use).

Also, on a related question: Am I correct there is no remembered state of charge if the shunt is disconnected? That you have to manually enter it, and/or let the battery charge fully? As opposed on power-up to resuming where it left off?

But my main goal is to be able to monitor it from an automation system during unattended imaging.



linwood-f asked
linwood-f commented ·

4 Answers

Raymarine integration roadmap ?

Hi all.

I,ve read the Raymarine MFD integration docs, but had a question regarding the cheaper series than the Axiom versions. (Element HV and Element S versions)

Will they ever get supported ? First of all, the price is quitte big for the Axiom versions. Second, I do like the way that the E and the S series have physical buttons. I,ve tried some of the displays of Raymarine an a large boat shop in Zaandam (NL), but like the versions with physical buttons more.

PS, the Axiom Pro does have buttons, but that`s the most expensive of all versions.

Greetings and have a nice weekend


leverg asked
Paul B edited ·

1 Answer

43 Posts
40 Users

Topic Experts

0 Points