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How do I use the digital inputs in cerbo GX

Community, I’ve installed a Cerbo GX. I think I’m happy with the relay functionality. 3v3 octocouple relay to allow power to a 12v fan. The digital inputs are a whole other issue and are doing my head in.
I’ve read the manual and some background stuff but I think I’m not getting it.

1. Are the inputs powered at 3v3? Do I just need to complete a circuit to change the input state, I.e. short across the digital inputs (I don’t think this is the case but I need to check)?

2. So what I‘d like is a digital signal when the bilge pump goes on. Here’s what I think I need to do… Put a relay across the pump power. Have that provide a 3v3 signal to the cerbo digital input. I’m aware that I need a diode or octocouple to protect the cerbo from inductive current/voltage due to the relay coil. The problem is I can’t find such a circuit anywhere.

3. Because I can’t find anything it makes me think I’m way off with my plan. Can you guys suggest a better way of getting an on/off output from the bilge pump?

Thanks in advance,

rupez1 asked
robert117 commented ·

6 Answers

Current Transformer vs Current Sensor - differences in configuration

Dear community. I am planning to get a CT (the blue one, by YHDC).

Do I need to change any settings to activate it? In particular, do I need to install the Current Sensor assistant on the Quattro-II and/or check the external sensor checkbox in VEConfig?

I am unsure, as there isn't much in the docs - and not even all pictures of the Quattro-II show the necessary (3.5mm) socket. Some pictures do, and there it is labeled "Current sense".

However, there is a Current sensor documentation which says "This AC Current sensor (CSE000100000) should not be confused with the specific Current Transformer 100A:50mA accessory for MultiPlus-II (part number CTR110000500)."

So is this a completely different beast? Or just the same thing by different producers, the Sensor for the old MP/Quattro, the CT for the MP-II/Quattro-II? Victron seems to sell both.

Is the blue one connected and configured the same way as the Victron current sensor?

According to
it says there is an option "External current sensor connected" box in VEConfig, but adds "This option is only for the optional current transformer."

However, in this video it says at 2:10, that for the Cerbo it is not actually an "external" sensor, so in the Venus ESS settings it should not be set as such. So external for VEConfig, but internal for Cerbo... o...k....

And, finally, this answer suggests that one shouldn`t even set the checkbox in VEConfig, contradicting the comment two links above.

So what is correct?

Thank you!

tobyfw asked
tobyfw edited ·

0 Answers

Cerbo GX on wired LAN, sensor on same LAN far away?

Is it possible to have a sensor supply data to a Cerbo GX over a wired LAN despite being far from the Cerbo? Or do sensors have to be wired into the Cerbo or connected via WiFi or BlueTooth?

alaskannoob asked
alaskannoob edited ·

1 Answer

Hi All how can i reconnect my tank sensor to my Cerbo GX

I go to settings to i/o and all that comes up is Digital inputs and it dos not read . it was reading the tank sensor befor .

john-th asked

0 Answers

VDO transducer 4-20mA connection to GX140 not working

connected VDO transducer from watertank as described, 0mA not working someone has a clue to resolve this? seems to do something with the output from the transducers.. see my electrical connection attached with spec's


from VDO, someone has an answer maybe get some additional electroninvs with it?

thanks guys

electriccare asked
pwfarnell answered ·

1 Answer

Setec Drifter water tank sensor

My van has these style water tank sensors fitted


Am I correct that these would not be compatible with the GX Tank 140?

db73 asked
db73 answered ·

1 Answer

Net metering hybrid solution question

Hi all,

I will build a net metering system with 5kw of Solar panels and 5kw Fronius inverter.

Since incorporating a battery with Fronius inverter is quite expensive I thought of the following solution:

Once the installation and inspection of the net metering is signed off I want to incorporate an external battery bank that will operate as a UPS for my home.

To do that I thought of integrating a Multiplus 2 8kva 48v with 19.2kwh 48v battery bank from either Power Queen or Redodo both are about 1800euros per 4.8 kwh battery.

The multiplus AC in will be connected in one of the Fronius AC out. At the same time I will connect a current sensor to the multiplus to check if there is current coming in (to the Fronius inverter) from the solar panels feed.

If not, then the multiplus will switch to battery completely.

I will not be able to connect only essential loads to the Multiplus as this will mean that I have to redo all my electrical wiring in the house, however we will be contacting all power-hungry activities during morning hours and especially during pick solar production time.

Disclaimer: I am asking if this is possible based on your experience, of course when time comes all work will be done by an authorised professional.

Thank you all in advance.

ctsit asked
ctsit answered ·

1 Answer

Inaccurate temperature reading

Hive mind, what do you have on this one…?

I’ve two of the type C (ASS2000) probes. I’ve trialed them both when connected to the cebo GX and the are both out by almost exactly +6C. They both read the same wrong temperature. I think I read somwhere that if you had Victron ‘Turbo Wizard’ status you could offset this error via the colour display. Does anyone have a hack I could use to get them reading correctly? Is there something else I can do to get them right (apart from subtracting 6 from the current reading that is…)

Thanks in advanice…

rupez1 asked
Alexandra commented ·

2 Answers

Gas Generator Fuel Level Sensor for Cerbo GX

I want to connect a sensor to the gas tank of my generator so that the gas level of my generator will show up on the VRM via my Cerbo GX. Can anyone please advise me as to who to do that?

allswell asked
allswell commented ·

3 Answers

beneteau VDO 5 sensor probe on Cerbo

MIght be a very dumb question but as i understand, the Cerbo only takes resistive tank sensors as inputs. On my boat and many others there is a VDO sensor which comes statard. It consists of five small screws in the tank which then connects to some type of conversion box which then goes to the VDO display panel. The wires to this panel are a positive, Negative and some type of measuring signal wire.

Can this type of measuring device be used in anyway on the Cerbo? I'm clueless with this but maybe someone in the community has a thought or experience.

polarseal asked
david-ross answered ·

1 Answer

GX Tank 140 Airstream Interface

Has anyone reconnected the tank sensors of a more modern Airstream (2013 in my case) to a Tank 140 unit? There is the built in interface and I'd like to replace or even better make taps so both can function side-by-side.

R asked

0 Answers

Davey Tanksense compatibility CCGX

Wondering if anyone can confirm this product will work with the CCGX and usb bluetooth adapter?


gabriele-rossi asked
gabriele-rossi commented ·

1 Answer

AC Current Sensor output Signal

I need to test the functionality of an AC Current Sensor in order to verify that it is not faulty. I assume it would be helpful to know the output signal.

karlheinzhaller asked
Thomas H. Clancy answered ·

1 Answer

Quattro-II 48/5000 QUA482504010 - no current sensor input?

I just installed my inverters on the wall and was wiring everything up until I became stuck on the current sensors, I have 3 of the 100A:50ma current sensors from victron and when I was wiring them only 1 of my 3 quattro's has the 3.5mm jack input the other 2 don't.

I purchased all 3 togerther last July and asked the dealer to give me the same model because of a 3 phase setup. so I checked and all 3 have the same PN: QUA482504010

anyone else have this issue? this seems like production error.

Kind regards




dutchpowerwall asked
nivek commented ·

0 Answers

Using multiple AC current sensors


I have a customer who would like to monitor multiple small PV installations using AC current sensors. My questions are:

1. Can multiple sensors be used in 1 installation?

2. What is the max length of cable run for these?

Many thanks

stevo07 asked
innoboreal edited ·

4 Answers

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