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Are there smoke alarms that work with the Cerbo GX > VRM like Ruuvi sensors do?

For people like us who live off grid full time but leave our homes to go to town for supplies now and again, it sure would be great to have smoke alarms connected to the Cerbo GX > VRM dashboard system so that I could get push notifications to my phone that there is an activated smoke alarm at my property while I'm away (or while I'm home for that matter!).

Sure would be a great safety feature of the system. Can anyone please tell me if the Nest or Ring smoke alarms would work, or if there are any other out there that would? If Ruuvi can tell me the temperature of my monitored area, it seems a little stretch for a smoke alarm to do the same if there is smoke?

Thanks Community!

allswell asked
gazza edited ·

2 Answers

Best settings for quick charge

Hello guys! In Ukraine we have a problems with electricity because of war so I have AC power on and off every 4 hour. So I want to modify my inverter settings to for better and faster batteries charging. Can you please help me with it because I'm newbie ? Should I change charge voltage or DC-input shut-down to save my batteries? Or maybe something else. Please, help. My setup:

  • Multiplus II 24/3000/230
  • 2 Victron batteries 220Ah GEL (series 24V)
  • Victron Battery Balancer
  • AC grid 40A max
  • Average load 1000 W

yuriy-boot asked
netrange commented ·

1 Answer

What ground fault device?

Last year I made an off-grid installation with six solar panels from Victron of 305 watts each. The solar array is expandable to a maximum of seven solar panels.

Why is seven solar panels the maximum limit of this installation?

I am glad you asked.

The installation is limited by the DC ground fault device and DC breakers.

The minimum expected winter temperature allows for a maximum of seven solar panels. This maintains the maximum open circuit voltage just below 300 volts.

In this case the limiting factor were the DIN rail safety devices from Midnite - GFCI and breakers - which are limited to 300 volts DC.

Any suggestions for a din rail GFCI and breakers that allow more than 300 volts would be appreciated.

blue-sails asked
Alexandra commented ·

1 Answer

Best way to automatically shut off an ESS system with smoke or fire alarm is detected

The system is configured with two 10K Quattros 120V/240V Split phase with 4 SmartSolar Charge controllers, a Lithium Battery with a CAN-bus BMS and it also has a Lynx Ion Shunt.

I would like to have a Smoke/Fire Alarm external NO or NC relay contact ask the Venus GX to put all Victron equipment is shutdown mode (Two Quattros and four SmartSolar) and if posible ask the BMS to shutdown the battery internal relay.

Is there a way to do with when ESS is been used.

Carlo asked
blue-sails edited ·

2 Answers

Arc Fault Detection Interupter planed?
is there a plan to integrate an arc fault detection interupter in the mppts? I think that is a good security feature 

Robert Riebli asked
michiel-boer answered ·

1 Answer

Generator AC-IN and PV Inverter on AC-Out (Zero feed protection)

Hi community,

I want to take some safety and be sure that my generator will never get feed-in from the PV inverter, so my flow is like this:

  • if the grid has been lost and batteries go near 20%, I will start the generator (a small gasoline generator, without automation functions)
  • then on CerboGX, change AcSource to Generator (there is no way to change using automation, over Modbus, unfortunately)
  • the change of ac-source-type will trigger an automated workflow that will change a contactor to enable the generator and also change ac-in Amps to what the generator can make (24A) (Modbus /Ac/ActiveIn/CurrentLimit)
  • Multiplus will soak as much energy from the generator as possible from AC-In + PV solar (Fronius) on ac-out
    • while batteries are low, and still in bulk is It safe to run PV solar (Fronius) with the generator on ac-in? is it possible to get feed-in by multi into the generator?
  • The batteries will reach some "end" goal which is 80%, my plan is to disable the PV inverter using `/PvInverter/Disable` Modbus, this will give me an opportunity to PowerAssist OR change the contactor that goes to a generator

As for now, my main concern is safety and not burning generators with feed-in, all other automation of how to get back to the grid could be automated later.

Thanks for the help!

Fedya Skitsko asked
Fedya Skitsko edited ·

2 Answers

Is the installation information of EasySolar 24/3000 correct? Looks like an accident waiting to happen...

Dear community,
Dear Victron,

I am looking at installing an EasySolar 24/3000 in an RV. I am scratching my head about the wireing diagram in Appendix B. Is this correct? Doesn't look safe... (see red circle)

I see multiple safety issues:

1. If N and L are swapped in ACin, L is directly connected to PE
--> When connecting shore power in a non-stationary setup, it is not guaranteed what L and N is. As long as CEE is used, this is standardized. Most other power connector do not have this guaranteed

2. built-in RCD is not useful in this case.
--> reliance on a correctly installed RCD in the shore power installation

3. Even though there is a RCD in the shore power installation, there will be a small delay for the RCD to kill the lines when plugging in
--> unsafe for a couple of ms, unneccary

4. EVEN IF everything is according to the diagram, N is connected to PE!
--> not allowed in any country I know when a PEN was divided into PE and N earlier in the installation.

So: Is this diagram correct or not? Could it be that PE from shore power / ACin is connected to the ground relais instead of N? That would be the end of the story and all would be fine, I think.


Thx for the help!


janeks asked
kevgermany commented ·

1 Answer

Ground Relay Safety

We use a MultiPlus Compact 12/1600/70 in our development vehicles to supply our measurement equipment with 230V AC. Now we have the question how the saftey of the Neutral-to-PE(Ground) relay is ensured.
- Does the MultiPlus test the functionality of the relais contacts?
- If yes, is there a documentation about this available?
- What is the reaction if the test fails?

Thank you for a helpful answer.

Best regards Timo

tien asked
tien commented ·

2 Answers

Firefighter disconnect switch

It seems in Ireland there's a requirement to have the DC side of a PV setup be disconnected in the event of a fire

Most of the automatic disconnects I've seen will cut the DC connection if there is a grid AC failure (from the firefighters switching the house's power off at the meter box)

This doesn't seem to work well with anti islanding since it would disable your PV in a grid failure

I'm wondering is there a way to accomplish a firefighter disconnect while still having power in a grid failure. I'm thinking perhaps a firefighter switch in the meter box which will open relays to isolate the PV, battery and Quattros would be suitable

Does anyone have any experience in this area?

cruisey1987 asked
shaneyake commented ·

2 Answers

Removed battery; what to do with wires coming from controller (MPPT 75/15)

Hello community,

Go easy on me.

I have a simple solar setup in my van: 75W solar panel -> MPPT 75/15 -> AGM house battery. I've removed the house battery from the van to plug into a charger/tender indoors (the van isn't going to see sunlight for a little while). What should I do with the wires that (ordinarily) connect the MPPT to the battery? I feel like I shouldn't just leave them dangling...

Thank you for the advice,

Gary the Van, and driver Chris

garythevan asked
Jan Neumann answered ·

2 Answers

Why do we have shorts and stray voltage while on shore power?

We are operating a sailboat with a Victron Multiplus 24v 3000Va charger/inverter onboard. We have recently been hauled out of the water for work and we now have some strange things going on. While we are on inverter power everything appears to be ok. When we plug in and switch the shore power on (3 pole switch/breaker) then we have 75vac between hot and ground, and 48vac between neutral and ground. There is 48vac between the grounded components of the boat and the dirt. This is happening regardless of if the multi-plus is active or not (when on shore power and the incoming 3-pole switch is closed). There are no shorts between hot & ground or neutral and ground on the plug side of the shore power switch. There are also no shorts between hot and ground on the boat side. This was determined by turning everything off and testing with a multimeter. This is perplexing and I am thinking that the multi-plus has failed or that there is a problem with the shore power. However the shore power tests just fine as well with no shorts and voltage only between hot and neutral, and hot and ground. Currently the chassis of the Multiplus is not tied to the ship's ground I will be working on that today, it is bonded however through the ac input line. We have an ELCI after the multi-plus which does not trip. The Multi-plus is wired directly inline from the switch for shore power, and is wired directly to the ELCI, which then goes back to the distribution busses.

Update: grounding the chassis of the multi-plus to the ship's ground has not resolved the issue.

Thank you.

animaashi asked
kevgermany answered ·

4 Answers

Why do the solar charge controllers not have GFPD?

I am trying to understand why the Victron solar charge controllers do not come with GFPD built-in since this could add considerable cost to every Victron charge controller having to add an external device for this depending on your legal requirements. To protect the 250V SmartSolar controller in the USA it appears the "safest" option is the $350 Morningstar 600V GFPD which is nearly half the cost of the controller itself. I know Midnite Solar charge controllers have this built-in so it is possible to do this without significant cost. I realize this may be tricky question to answer but am generally trying to understand the reasoning for it not being built into every charge controller if it is in fact a safety feature whether or not it is installed in a location that legally requires it.

I know other parts of the world are installing these in residential stationary settings. Are most of these locations not required to have GFPD and/or is there something considerably cheaper that is being used for that protection especially for the 250V controller?

Is Victron working on a solution to make it easier to install these in markets requiring this feature?

dbainbridge asked
dbainbridge edited ·

1 Answer

Safety Switch on "Remote on-off"

Hi everyone,

Can we use a safety switch connected on the remote on-off bridge of a Quattro/ Multi ?

I know there's an assistant for that but it's hard to use in big three-phases system:


And it cannot be used on BMS controlled batteries:


Why not wiring it this way:


This way, all the Master remote on-off could be parallelized. Am I missing something about the electrical safety rules ?

Best regards

Danakil asked
Daniël Boekel (Victron Energy Staff) commented ·

1 Answer

Battery protect with Lithium

Has anyone used a Battery protect with a non victron lithium battery? The batteries would have internal BMS with no external communication capabilities. Could a person set switch/relay from a BMV or Venus (once the virtual switch update comes out?) to control the battery protect?

polarseal asked
nebulight commented ·

2 Answers

Multiplus or Phoenix inverters -- what AC voltage appears on the DC terminals (if any)?

I'm surprised that manufacturers don't state these figures (so far as I can tell) since they are of substantial importance for electrical safety.

If I run a Phoenix or Multiplus inverter with the AC neutral and earth bonded, what AC voltage, relative to earth, appears on the DC battery terminals?

I would hope that the answer would be "none at all", and that I could safely earth one of the DC battery terminals if I needed to. However, I've experimented with a couple of inexpensive (not Victron) inverters, and they both energize the DC terminals with AC to some extent. They couple only be run with floating, not earthed, batteries.

The reason this is relevant to me is that I have a significant 12V installation for lighting, etc., that will run from the same batteries as the inverter. This is all wired to comply with standards that apply to extra-low voltage installations. If using an inverter impresses an AC voltage on the DC side of more that 25V RMS relative to earth, then it would all have to be rewired.



larsthebear asked
larsthebear commented ·

2 Answers

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