VE.Direct maximum allowed voltage

VE.Direct is isolated, so it needs power from the "client" side. I want to connect it to JK BMS, but it's Power+ pin is Vbat which means around 55 V.

What is maximum allowed voltage for Power+ pin on VE.Direct on USB-VE.Direct cable and on Cerbo's VE.Direct port?

mihlit asked

0 Answers

AC shore power availability for Multiplus output

I've searched extensively and am still confused. In this link @markus suggests "switch to charger only and now the AC shore supply will still be on and the inverter will be off, leaving ...AC shore supply available for DC charging and AC power...".

Another post from @JohannesBoonstra to this blog states "[for] ... Multi and Quattro the inverter always works (and the ACout is powered) when the unit is charging"

However, currently the experience I'm having with my multi (purchased Sep 2021) is that the ACout is only available if the unit is in the full on mode. The 'charger only' mode eliminates ACout to the receptacles. The problem with the full on mode is that if the shore power is unknowingly disconnected, the batteries drain very quickly due to the standby current draw. I did try the AES function but the modified sine wave didn't help much and the AES surge mode caused issues with the microwave.

What I want is to configure my multi so the following happens:

* When shore power is connected/ON (120V up to 15A)

Ability to use ACout to power receptacles

Inverter is off (eliminating standby current draw)

Battery is kept full or charging

* When shore power is disconnected/OFF

Battery is prevented from discharging

Inverter is off (eliminating standby current draw)

(which also means no power available at ACout power receptacles)

To do this what is the configuration I need? @markus references an article suggesting setting the multi to 'charger only' and the current to zero. Can someone clearly confirm this and whether I need to actually purchase a Digital-Multi-Control to achieve the above behavior? Are there other alternatives?

One would think the default behavior with a 'charger only' configuration would be to allow any ACinput to pass through (if present). In the 'charger only' configuration it does not make sense to me that the current limiting function should have any bearing on pass-through ... a value of zero seems to imply there is no current available/allowed for charging (i.e. the multi is equivalent to fully off). Any explanation as to why this is not the case is greatly appreciated.

thank you.

earl0101 asked

0 Answers

Pylontech LV Hub Communication protocol

What cable do you use between the Pylontech LV hub and Cerbo GX. I am getting no comms using either of the Victron BMS Can cables (type A or B)

marc-1 asked

0 Answers

Fronius, Multi & generator


I have off grid, AC coupled system with Multiplus 3000 and Fronius Primo 3.0, 24 V battery and generator.

Generator is switched on manually. Problem is when I turn on generator, after half minute on Fronius is error code "105 AC freq too high" and fronius going to reset.

After reset again coming new reset..

Does anyone have an idea what the reason is?

Also, I am afraid about returning power from PV to generator in case of sun coming.

My idea for solve problem is install AC/DC 230/24 V charger directly from generator to charge battery in case of empty battery (few times per year)

What is your opinion?

vedran asked

0 Answers

Do I have a problem with GX inside my EasySolar-II GX?

At the end of December 2021 my ES-II GX stopped receiving data from internal MPPT 250/70.

After pressing GX reset switch communication came back.

I noticed that problem after 3 days only because GX was reporting over 1kW production from MPPT 250/70 when Sun was setting. The reading was frozen.

In my system I also have MPPT 150/35 connected to GX, and this one did not have a communication problem.


8 days later I got VE.bus error #17 when grid failed. Unit that stopped communicating with its slave was EasySolar-II GX since it was a master on L1 phase.

I replaced RJ45 cable between master and slave in that phase.

3 hour later this error happened again in the same phase when grid failed.

It cannot be a fuse since there is common fuse for master and slave in each phase.

This time I did not touch anything and only turned all 6 units off and on.

System started operating normally.

9 days later, again on grid failure, VE.bus error #17 happened again.

Like before, without touching anything restart of all units fixed the problem.

It is very frustrating since when this error happens, my house is in the dark.

On the Victron information page error code #17 at the end is information that:

Recovery: auto-restart once the error is gone. 

How to interpret this statement?

To me it looks like that if a cable is at fault, its replacement is enough and no restart is necessary.

Same with the fuse. If fuse is at fault, its replacement is enough and no restart is necessary.

But if GX unit is at fault, because its communication is frozen (like with the MPPT 250/70), the GX unit needs to be restarted. Turning all 6 units does just that because one of those 6 is the ES-II GX.

Any suggestions?

More info on this error #17 and my system you can find in this topic:

marekp asked
marekp edited ·

0 Answers

Buck boost on/off via ATC-signal from Lynx Smart BMS - yes or no?

Hi Community

I have the following setup to charge my Smart Lithium Batteries while driving my van:

  • Buck-boost switches on via vibration sensor
  • Charge is applied to Lynx Distributor positive bar (from which also all DC-loads are powered)
  • Smart Lynx BMS connected to Lynx Distributor
  • Batteries (2x200Ah in parallel) connected to Smart Lynx BMS

Now, during winter, the batteries are regularly too cold to charge and Smart Lynx BMS shows "Not allowed to charge".

Usually, I check the situation before I start the van and keep the BMS in Standby mode if Victron Connect App for the batteries shows low temp alarm (i.e. main contactor is open, so batteries are disconnected).

Recently, I had the BMS in operation while parking so the contactor was closed, and when I turned on the engine and the Buck Boost switched through for charging, the BMS opened the contactor due to "Not allowed to charge", thus disconnecting the batteries AND, as charge voltage still reaches the Distributor, all my DC-appliances still work while driving (e.g. lights, USB-chargers and the audio system.)

My questions are the following:

1) Are there any reasons to not use the buck-boost & BMS-auto-disconnect at low battery temps in the way explained above while driving?

2) If this should not be used in that way (according to answer with some reasons under 1)...), there seem to be several ways to prevent the Buck Boost from becoming operational in such situations e.g. not using vibration sensor but Pin 1 with e.g. input for the ATC-signal from the BMS. In the "help-text" in TSConfig point 50 states "Attention, when using pin 1 as an input, connect a 1k-10k resistor in series.

  • Is this really needed for the ATC-signal coming from the Smart Lynx BMS (I recall reading somewhere it's 1,5A only...)?

Thanks for reply and explanations. If a resistor is needed on Pin1, it would be also helpful with a link where to purchase an applicable such (I do not find "range"-specific resistors and only such that are intended for circuitboard welding).


Ingo Pfeiffer asked

0 Answers

Victron Smart MPPT RS 450/100 Error 67

Hi guys, I am getting a error 67 (no bms) on some of my sites that we are unable to resolve, the battery does seem to have communication as it shows the battery on the cerbo gx... This is happening on three of my sites, I will use one site details for reference.

1 x Quattro 8kVA

1 x RS 450/100

1 x SolarMD 14. 4kWh with Logger V2

1 x Cerbo GX

The RS450/100 is connected via CAN communication.

eong asked

0 Answers

NEED HELP! Van build electrical system experiencing array of issues

Hey everyone, we built a very nice electrical system for a customers 2021 Ford Transit and it seems to be plagued with some problems. I have racked my brain, double and triple checked everything, and can't come up with any answers. I'll give a breakdown of the system, then the issues they are experiencing:

200ah Battle Born Lithium batteries
Victron Orion Smart 30amp DC-DC charger
Victron SmartSolar 30amp MPPT charger
Victron Multiplus Compact 12/2000/80 Inverter/Charger
Victron SBP-100 Smart Battery Protect
Victron BMV-712 battery monitor
2 X 100watt Renogy panels
All wiring is Ancor Marine, fusing is Blue Sea Systems

The biggest loads on their system is their Webasto AT2000 heater, and Dometic CFX-65DZ fridge: around 50watts total


Battery drain - while traveling they will regularly wake up and the batteries be at 70%. The heater may kick on a few times at night, but this seems like excessive battery drain.
Battery low voltage - they are getting low voltage warnings from the BMV-712 as well as their fridge; batteries are at 75% charge, but showing low voltage. This seems odd; our experience is that LiFePO4 batteries can maintain high voltage even when discharged.
Odd charging patterns - the other day they drove for an hour in bright sunlight. They should have easily topped off the batteries from the alternator plus solar charging. BMV-712 showed 62% charge. Then 5 minutes later it updated to 100% charge. Is it possible there is a communication error with the battery monitor?

In general, it doesn't seem like their system is charging as well as it should, and the batteries are draining way too quickly. We are out of ideas, as everything seems to be put together perfectly. Any thoughts? What kind of checks can we do? Could there be a parasitic drain on the system, and if so, how do we find that? Could we have a bad ground somewhere? And lastly, could these batteries be damaged if experiencing low voltage?

Thanks for any thoughts/suggestions.

richie-trent asked
richie-trent commented ·

0 Answers

Propose suggestion for ESS "Auto Recharge" settings

I understand there are charging schedules, but I dont see anything that would automatically prevent an auto recharge. Such as "SoC has been below SoC limit for more than 24 hours" or "Recharge, SOC dropped 5% or more below MinSOC". For instance, If its two hours before typical peak sunlight time. I dont want an auto recharge right before max PV input. Give the panels a chance to charge the batteries. If this fails then recharge at some off peak hours (night?). This would seem to maximize efficiency.

Suggestions or comments?

Similar to this previous feature request

elvis asked

0 Answers

VRM Instance Number Changed


Amongst a couple of firmware upgrades and factory resets to my Cerbo GX, two devices have changed VRM instance. E.g. Smart Solar MPPT changed from 278 to 279. This also affected a GX Tank 140 input.

Is there an explanation for this, and is there a way to move VRM history from 278 to 279? I do not want to lose the history for the original VRM instance device.



stevomyatt asked
Alexandra edited ·

0 Answers

AC coupled Quattro + Fronius (microgrid) + Huawei inverter

Hi folks,

I have a quattro + fronius microgrid that's not working very well (tried on output of quattro, tried on input... it's limiting the hell out of fronius output), so i'm currently using the fronius smart meter to limit injection to grid (undesirable as I pay for export).

But next week, I will install another 3Kw system with Huawei inverter (this will also be grid-tied and approved by the power co. for export).

Below is the diagram that I though on using. Basically just inserting the 3Kw Huawei inverter between the grid and the smart meter.

After this new installation, I can inject a bit more to grid from the fronius, or victron, as long as anti-islanding is obtained.

PS - my victron is acting up under heavy loads ( i need to warranty is someday...) from battery, so I am forced to user the EV charger directly form Grid or whenever I do have solar enough to discharge from battery less than 2-3kwh, hence the location.


iromeo asked

0 Answers

while multi II 2x120 is on shore power, ac power is coming in and passing through plus charging batteries, but an error of ac input not available on the screen and no ac is showing.

Multiplus II 2x120 with cerbo gx plus 50, not seeing ac input on screen with error of no ac input available. ac is connected and passing through system.

sjwysong asked
Paul B commented ·

0 Answers

Problème limite d'état de charge VICTRON MULTIPLUS II GX


Quand mes batteries ont une limite de charge inferieure au réglage sur la console a distance (limite actuelle d'état de charge) le MULTIPLUS II recharge les batteries la nuit pour atteindre la limite supérieure (c'est normal) le problème est que cette recharge intervient aussi en heure pleine ! (mes heure creuse de 21h a 23h et 2h 8h) peut on choisir une plage horaire en heure creuse pour faire cette recharge ?


Système photovoltaïque en ESS autoconsommation MULTIPLUS II GX batteries PYLONTECH et onduleur FRONIUS

thierry27 asked

0 Answers

Multiplus II with Cyrix-ct

Is it possible to put a Cyrix-ct between the house battery bank, which is charged by the Multiplus II, and the starter battery which is charged by the second charger output which is limited to 4A. This will allow the starter battery to charge faster once the house batteries are fully charged.

Thank you,


ralphd asked

0 Answers

Cerbo temp sensor scale

My temperature sensors are off on my Cerbo. So I adjusted them in room temperature with offset. But now thay are off when its cold outside. So I need to scale them. Around what temperature is the scale placed? The scale has to be 1 somewhere. The first that comes i my mind is that its around 0 degrees. But it could also be something else?

0 degrees x 1,2=0

4 degrees x 1,2 =4,8

So zero is the most mathematical logic?

jon-norberg asked

0 Answers

Cyrix-ct remains connected with engine off


I have installed an exide 100 ah 900a lead acid battery as the starter battery and a varta 85Ah 800a lead acid as the service battery. Both are connected with the cyrix-ct 12/24v 120a. I have triple checked the connections and they are correct.

When the engine is running, both batteries charge perfectly, but when I turn off the engine, the cyrix-ct stayed connected, and wont isolate or separate the batteries, even if I leave it overnight.

I have tried removing the cyrix-ct and installing it again, and when I connect both + poles it engages and remains connected even before connecting the - to the 86 connection.

Anyone has any idea of what could be the problem?

I have also tried with a new cyrix-ct, and it does exactly the same thing.

I am completely lost with the issue.

I will appreciate any help.

joesy asked

0 Answers

Multiplus AC low voltage disconnect


i am absolute new at the multiplus configuration.

I want to change the AC low voltage discounnect from 180VAC to 210VAC for operating with a generator.

The multiplus devices are online and i can download the configuration with VE Configure 3 Software over lan to a file but at the tab grid there are the settings for the ac voltage not visible.

Does somebody know why?

hp1986 asked
Jesse edited ·

0 Answers

LG Chem RESU Plus and Multi Plus 2 not inverting

Been running a ESS system for some years, Multi Plus 2 and LG Chem RESU 6.5, it's all been working fine.

To add more capacity i have added a RESU 10 via a RESU Plus (bonding the two batteries togeather).

I have changed the capacity in VE Configure = to 315 Ah (sum of the two batteries). Changed the relevant DIP switches on the batteries.

Also running colour GX, the battery is recognised, and last night scheduled charge worked as expected. However the inverter will not invert. Grid power = AC load and battery is not discharged.

I have reconfigured the battery DIPs, connected directly to the inverter (not via RESU PLUS) and system works as expected with each battery in turn.

I have asked LG Chem for the latest BMS firmware, but in the mean time any ideas?

k2aab asked
k2aab edited ·

0 Answers

Multiplus II Ignores "Low Temperature Shutdown" Threshold


I am creating this post on behalf of a fellow client of ours. Our client recently bought 2 Multiplus II's and configured them into split-phase (master/slave). Both units seem to work well except the slave unit or Leg 2 (the second Multiplus II in the set up) seems to ignore the Low Temperature shutdown threshold. Our client reached out to us about the problem attaching a YouTube video describing the issue and the specific set up that we will link as well. After inspecting the video and specific Victron Configure programming settings we asked the client to send us for BOTH units, it appears that both Multiplus II's are set up with the proper and identical settings however leg 2 (or the slave unit) completely ignores the threshold. This seems like it might be a firmware like issue, but incase anyone else is dealing with this issue, we'd like to shed light on it in hopes we can either find a fix through the community, or hopefully this brings enough attention to come out with a firmware update fixing the issue.

Link to YouTube Video:

jpearson1223 asked
jpearson1223 commented ·

0 Answers

MPPT 75/10 load output turning off on firmware update (India)

Hi All,

We have several instrumentation projects in India and have deployed over 350 of your:
1. Blue power smart charger IP65
2. Bluepower MPPT 75/10 solar controller.

The smart charger is working fine and predictably, no complaints.

We are having issues with the MPPT controller which include:
1. Its settings defaulting back to 12V operation from 24,
2. Not remembering settings when our field teams connect via cell phone over bluetooth (using
the USB bluetooth dongle), the unit asks for a FW upgrade. They upgrade the unit, it looks
fine, load in the config, leave the site and the unit again goes back to 12V operation.

3. Every once in a while device cut off the load even the batteries and PV is working fine, the load cut off value is set to 21.5 volt but controller cut it on 26 volt and it never turn it on, we have to send a person to that location multiple times with Bluetooth dongle to fix the issues, once we upgrade the firmware and user defined config file it works fine for some time and then go again into same mode.

The India dealer is Auroville Eenergy Products and the only support they offer is to replace
the units. We have had this problem at many sites, at least 50 so it cannot be so many
failures. Auroville really doesn't know how any of this stuff actually works.

We are getting to the point where we might be forced to use another brand of solar controller
unless we can figure out a way to stop this. I know your products are well engineered as I
have used them for over 20 years in projects all over the world but our back is against the
wall. Its not only costing us a small fortune in site visits but our reputation is taking a
beating to these malfunctions.

Could we get some technical support on this issue? We're not getting any from Auroville and we
are desperate.

digvijays asked
kevgermany commented ·

0 Answers

Split phase requirement for 240 volt HVAC system

Hello everyone! I'm new here and really enjoy the extensive knowledge Victron puts out to its customer base!

So, here is my situation. I have the need for 240v split phase (SP) on my RV due to the installation of a 240v inverted mini split HVAC system. I've heard that there was a method to get one Multi (L1) to passthrough/charge and another Multi (L2) to invert from batteries to make 120/240 SP when incoming power is only 120v single (Obviously not as efficient but with solar and many kWh on hand it could work). I've also seen Victron's recommendation to use a 240v inverter coupled with an autotransformer to make 120/240 SP but that would be problematic when the incoming power is only 120v because I would need an autotransformer to make 240v. That's two autotransformers! Not to mention, I already installed two 120/3000/70 Multis configured in SP.

Now to the question, using the method above where you have one Multiplus passthrough/charge L1 and the other invert for L2, how do you program it?

Or another option would be to utilize a skylla-ip65 120/240 charger for when incoming power is not ideal?

Hope this makes sense. Thanks!

fulltarr asked
fulltarr commented ·

0 Answers

Maximale Wechselrichterleistung ESS 3 Phasensystem

Hallo Community,

ich habe ein 3 Phasensystem mit 3x MultiPlus 48/5000/70 installiert und in Betrieb genommen.

Soweit so gut. In den Einstellungen sind mir zwei Dinge noch unklar.

1. Phasenkompensation "einzelne Phase" od. " Summe aller Phasen" in Deutschland!

da ich nicht einspeise habe ich eigentlich keine Vorgabe meine Energieversorgers, oder!?

So bin ich den Empfehlungen von Victron zu "Summe aller Phasen gefolgt".
Habt Ihr hier andere Informationen wie die Einstellung sein muss, speziell in Deutschland!?


2. Maximale Wechselrichterleitung begrenzen!

Mein System wird über ein CCGX überwacht.
Betrachtet das CCGX das System komplett oder jeden einzelnen Wechseltrichter?

Ist die Einstellung also für die Summe der Ausgangsleistung oder für jeden einzelnen Wechselrichter relevant?


Danke für Eure Unterstützung.

argei77 asked
bbmz commented ·

0 Answers

Victron Multiplus II, 2 x MPPT charge controllers, FreedomWon LiFePO and 48V DC Wind Turbine

Hi there,

I have the following setup:

- Multiplus II 48/5000

- 2 x SmartSolar MPPT 250/60

- FreedomWon 10kWh with BMS (Absorption and Float = 55.8V)

- 1500W Wind Turbine with its own controller 48V

When the sun goes down and the system is using battery power, I want the Turbine to supply power to the system (obviously when there is wind). I am not sure that this is actually happening. So my first question, can I use a SmartShunt to monitor the DC current coming from the Wind Turbine and then also display those values on the CCGX? And my second question, what would be the best settings for the wind turbine controller, as the controller cant communicate with the battery BMS?

I would appreciate your assistance.

Thank you

chris-5 asked

0 Answers

Orion 12/12 30A

Mobilehome built on Iveco daily 2017 Euro6 with standard 160A generator.

all victron equipment: 2xmppt, smartshunt, 2xOrion 30A, 3x200Ah lifepo.

problem is that the smartshunt reports max 38A sharging when driving.

anyone having ideas on what could be the problem?

mhuusko asked
Matthias Lange - DE commented ·

0 Answers

Monitoring PV invertors wireless

Hello everyone,

I was wondering what the best option is to wireless monitor several pv inverters.

The victron installation has an Multiplus 3000 II GX and a Gerbo GX.

I use an ET340 , connected via USB to the Gerbo GX,for the grid and there is no possiblity to place cabling to the PV inverters. I was thinking the Zigbee antennas were an option but can multiple EM's connect to one antenna using a switch?

Thanks in advance.



davidvm asked

0 Answers

PE Eingang an Trenntrafo


Kann mir jemand Auskunft darüber geben ob der Eingangs PE noch zusätzlich mit der Klemme J34A verbunden werden muss oder nicht. Der Händler konnte mir leider keine Eindeutige Auskunft darüber geben.

In der Beschreibung steht:

"Im Schwimmzustand verbinden Sie die PE Eingangsklemme ,mit der Steckverbindung J34A (schwarze Verbindung in Abb.4). Hiermit werden Eingang und Ausgang getrennt."

Im Lieferumfang gibt es aber kein Verbindungskabel um die Klemme PE mit J34A zu verbinden und wenn ich die PE-Eingangsklemme mit der Steckverbindung J34A mit dem Durchgangsprüfer prüfe , besteht da auch eine Verbindung ohne zusätzliches Kabel/Brücke.

Ist mit "schwarzer Verbindung" die Verbindung auf der Platine gemeint?

Die Verbindung "Boot an Land" (J34A zu J34) ist klar dafür gibt es im Lieferumfang auch ein Kabel.

Ist da die Beschreibung durch die Übersetzung etwas unverständlich geworden?

Wie habt Ihr den Trenntraf angeschlossen?




torbole asked

0 Answers

Victron 50a Buck Boost

I'm wanting to know if it's possible or a good ideal to add another Out line to an existing setup in order to charge another battery bank?

jhayes asked
Alexandra commented ·

0 Answers

Alert temp units for Cerbo GX temperature sensor

I have the Victron temperature probe set up with my Victron GX and set the units to Farenheit in the Profile settings. My problems are that when I set the alarm thresholds and in the alerts I get during an alarm condition, the units are always in Celsius. Is there a way to get the units to be Farenheit everywhere? If not, I think this would be a good improvement to the software...thanks!

olivier-hecht asked

0 Answers

REC Active settings for "Main Relay" and "Charge Optocoupler"

I am setting up a REC Active BMS with Victron integration.

I will use CAN bus to control the charge and discharge profiles, but I'm also connecting a master cut-off contactor.

The documentation for the REC HV and LV diconnect commands and associated switches are not perfectly clear to me.

I believe the setting CMAX (and MAXH) controls the Charge Optocoupler (pin 14 and 15), and CMIN (and MINH) the Main Relay (pin 4&5).

I also have a question regarding setting STRN (number of inverter devices on the bus). What is the definition of an Inverter here - just the Multiplus or also the Solar controllers. The reason I'm asking is to understand the max charge/discharge (MAXC and MAXD) current setting.

REC list this as max per inverter device, so having a Multiplus as well as two Solar controllers one can end up allowing to much current if the setting is "per inverter"

Appreciate any help


calypsosea asked

0 Answers

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