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Tip! When a Multiplus keeps disconnecting the battery

It took me some time to find out what was the problem, which I did, so not really a question, but for future advice I put it here.

I have had some issues with my Pylontech battery that kept disconnecting from the Multiplus 2 GX showing "Not connected". Sometimes it happened 5 times in 1 minute, really annoying. Now I did notice there were high voltage warnings, but I seen them before. Then there was no problem because it gave overvoltage warning already from 52V (15 cells). The real problem started later with the intermitting disconnecting from the MP2. First I thought it was an CANbus problem, but I found out the BMS was shutting down the charge or discharge even when the voltage was at a normal level. It needed a hard reset (with the BMS reset button) to get it out of this loop. Afterwards change parameters for high and low voltage and thats it

banne asked

0 Answers

Switch Quattro state over CANBUS/NMEA

Is it possible to switch the Quattro state, on/off/charger only, over CANBUS/NMEA? What messages would need to be sent?

I see in the VRegs doc that the code 0x0200 is a read/write command.

mattyroo asked

0 Answers

Kisae BIC122080 CAN BUS communication with Cerbo GX

Hello! In my camper trailer, I have a Kisae BIC122080 Inverter/Charger that has a CAN BUS port on it (4 pin ATX I believe, manual doesn't specify). I have a Cerbo GX that I would like to connect to the Inverter/Charger if possible. Ideally this would show up similar to the native Victron inverter/chargers being able to show power input from shore power, AC loads powered by the inverter, and charging details for what is going to my battery bank. Does anyone have any idea if this is possible? I believe I would need to create a custom adapter cable to go from the 4 pin ATX CAN BUS connector to the RJ45 CAN BUS connector. I guess my main question is just around the feasibility of the two devices communicating and the Cerbo GX's ability to visualize and integrate the operational data of the Kisae unit. Let me know if there is any other information I can provide! Thanks kindly for reading.

stefprez asked

0 Answers

Skylla-IP65 Charger Control

I'm planning a system that includes a Lynx Smart BMS, a Cerbo, and a Skylla-IP65 charger. In the Specifications section of the manual it says "Li-Ion Charge Curve: 2 stage, with on-off control or VE.Can bus control."

I understand the part about on-off control wired to ATD on the BMS.

The "or VE.Can bus control" part suggests that the BMS can take full control of the Skylla including charging current and voltage without need to hardwire the ATD connection. Do I understand this correctly? Is this the same as DVCC?

Rob asked

0 Answers

CAN Values sent from EMUS G1 to Victron - 2022


writes in one Comment

on the Cerbo GX and Touch 50 you can see
- Voltage, current, state of charge and state of health, battery temperature
- desired charging voltage and charging current and max discharging current
the last three values are interpreted as DVCC values which the Cerbo gives to a connected VE.Bus charger like the Multi series. 
Furthermore you can see every alarm message.

Im allready using a EMUS G1, but sadly an old an incompatible (to Victron.img Firmware) Hardware Version from 2018.

So i cannot test the CAN Bus Connection to Victron by myself without buying a new G1 Unit.

For my growing second Life Battery Packs i need/want to log and see the

  • lowest/highest individual Cell Voltage and Temperature
  • ideally the actual individual Cell voltages
  • and the data stated by @bricki in 2021

Could someone please send some screenshot from the actual sent data between EMUS G1 and Victron. ideally also the visualisation in VRM.

(Im asking about that cause im kind of thinking about switching to RECBMS cause in this article and also in their Manuals i can see that all neded Data is sent via CAN https://www.offgridsoftwaresolutions.com/ws500-user-forum/topic/connecting-my-rec-bms-to-a-victron-cerbo/#postid-529)

but that would mean kind of an rebuild of my batterie packs an in genernal im really happy with the EMUS

I contacted the EMUS Support several time, they are fast and helping, but cannot support me in my question, just telling me "CANBUS between EMUS and Victron is supported"

So its a question of REAL-LIFE-EXPERIENCE and sadly not readable in manuals

how did those people experiences turned out who asked those question in past.

@Emmanuel Allaud @Asbjoern85 @arghhh40k @Kai Behrends @Jokani

thanks in advance


notger asked
notger edited ·

0 Answers

Can a Multiplus 48v 800va be used as a charger only to supplement an existing ESS?

I currently have an existing Multiplus II GX 5kva with 20kWh, 48v batteries in grid connected ESS charging mainly solar and also a 4 hour off peak electric when the batteries are low. The issue I am starting to find is the 4 hour window is not long enough to charge the batteries (3.3kW max charge rate) so I am looking at other options on how to inject more energy into the batteries within that 4 hour window. The obvious cost effective solution would be another 48v charger timed to come on during this 4 hour period set to shut down at the same voltage bulk finishes on the Multiplus II GX.

My question is can this be done without issue or is anyone aware of any issues in doing this?

Is there a better solution? I do also have a cheap 24v 3kva inverter charger with lead acid batteries doing nothing much at the moment and I also thought about maybe using a 24v to 48v charger? Any way to connect a bus controlled 24dc-48dc charger to my existing Multiplus II GX?

Jason - UK asked

0 Answers

Protocol BusCAN


Je suis à la recherche des spécifications du Protocol BusCAN de Victron. Est il possible de l'obtenir quelquepart ?

lalluyn asked

0 Answers

Can an old BlueSolar MPPT 150/85 CAN-bus be used in Color Control USB port?


Is there any way of using the old-type BlueSolar charge controller MPPT 150/85 CAN-bus (SCC010085000) on a Color Control GX that already has the single CCGX CAN port taken up with the Battery BMS?

I know that you can use the VE Direct to USB interface for the newer SmartSolar types- I wondered if you can use some kind of VE Can to USB interface for these older versions?

Or is there another option?

lazza asked

0 Answers

MPPT 450/100 display as "NOT CONNECTED"

Hi everyone. New Victron user here :)

I have :

  • an MPPT 450/100 connected using VE.Can to a Cerbo GX (terminator connector used on each one)
  • a Multiplus-II 48/8000/110-100 connected using VE.Bus to the Cerbo GX
  • Pylontech batteries connected to Cerbo-GX using the good Victron cable to the Cerbo-GX
  • DVCC is on ( charge informations are provided by the Pylontech BMS)

I have a strange behavior with the MPPT not showing as PV Charger on the VRM online and marked as "NOT CONNECTED" on Device List.

More strange, when I connect to the MPPT solar, or when I reboot it, it appears in both device list and VRM, but only for approximatively 30 seconds and then it desappers again.

I monitored the device list and sometimes, the MPPT is showing up by his own, but only for a few seconds.

Note that the device itself is working well.

I have tried using another cable, but the behavior's still the same.

Has someone experienced the same problem ?

Maybe it is "off" at night with no PV production ?

Thanks for your help or advice :)

jncanches asked

0 Answers

Can I connect a SmartSolar MPPT Tr to a SmartSolar Tr VE.CAN?

Good day,

I have a SmartSolar MPPT 250/100 Tr and I need to add another MPPT to my configuration.

I like the SmartSolar MPPT 250/100 Tr VE.CAN and its ability to synchronise charging across multiple MPPTs.

Can I use VE.Direct to VE.CAN interface cable to connect my old and new MPPT?

muchachos asked
Noah Springfield commented ·

0 Answers

Help with a new offgrid systeem

I'm new to the off-grid thing I've started the first purchases for my off-grid system this will mainly be used in my garage/workshop
The components so far are
- the solar panels
- victron MPPT100/35 smart
1 battery Liontron LifePO4 type LX48-50 - 50Ah/ 2.56KWh

The battery has a BMS on board that can communicate via CAN bus

Still to buy
- converter phoenix 48/3000

- To ask
do I have to use the CAN bus on the battery, if so what is needed

-40Amp between MPPT and the busbar for battery charging
according to victron's calculator we would get the following charging current
Max PV voltage@min temp=89.6V
Min PV voltage @max temp =55.8V
Max current@MPP min temp =30.9Amp
Max curren@Mpp max temp =24.5Amp
I provide the section of cables for this on 10mm² with a max length of 150cm
The cables supplied for mounting the battery on the busbar are 25mm² it is advisable to put a fuse between them - 50Amp or more?
Discharge current >50A(>5sec) or Discharge current >75A(100ms)
Short circuit current: >300A(>400µS)

between busbar and towards the inverter fuse 100A and possibly smart battery protect SBP 48/100?? and also a switch

3000W at 48V gives a current of 62.5Amp which I will rarely use

Any info to put me on the right track is most welcome

pkvo asked

0 Answers

Lynx Shunt ve.can + Phoenix Inverter ve.bus + CCGX + what else?

My new lynx shunt with ve.can ports is sitting a foot away from my phoenix inverters with their ve.bus ports and quite obviously they cannot communicate with each other. The inverters are connected to a CCGX panel about 50 feet away obviously via ve.bus, and the CCGX's ve.can port is connected to a N2K adatper to feed my main data backbone. I would rather not pull another 50 feet of cable through this boat to bring the shunt's ve.can port up to the CCGX. What are some viable alternatives? The goal is to see the shunt on the CCGX and for the shunt data, along with (already working) inverter data to be forwarded to the N2K bus through the adapter from ve.can

Add a Venus GX (or Cerbo GX) near the inverters and shunt and connect both ve.can and ve.bus to the Venus - will the Venus/Cerbo forward all the data between both networks so the CCGX will see it all?

Add another ve.can-N2K adapter on the shunt's ve.can port - will the CCGX see the shunt data on N2K and bring it in as ve.can?

Save up a lot of money, buy the entire Victron company outright, and put them to work making all their products network compatible without the use of a different unique adapter for every device?



Chris Barber asked

0 Answers

Lynx shunt ve.can current output?

Hey Everyone, I am currently working with the lynx shunt 1000, and am trying to get the actual current. I have been referencing the can registry, but I have not been able to get a message that does not return the dreaded 8000 error code. Any suggestions?

Thanks so much!

Steven Kraine asked

0 Answers

VE.CAN + NMEA 2000 + Fischer Panda Generator

I'm planning on an install with the following VE.Can devcies: Cerbo GX and Lynx Smart BMS. I am also planning on installing a Fischer Panda generator, and would like to use the J1939 connection method so I can log data from the generator as well as do automatic start/stop. Last, but not least I would like to have the Victron data on the N2K network to display on the chartplotter.

What would the best way to accomplish this? Reading the VE.CAN to NMEA2000 documentation, it appears that it would be best to have a VE.CAN to N2K cable for each device, but should I do that with the generator as well?

Alternatively, maybe it would be easier to keep a separate VE.Can network with just Cerbo GX, Lynx Smart Shunt, and FP generator and then install a Raspberry Pi w/ N2K and SignalK and pull the Victron data over MQQT?

hoeken asked

0 Answers

How to use a programmable relay assistant using SOC setting

When I try to configure programmable relay assistant in Multi II to close relay, using SOC level settings, seems that assistant doesn´t use SOC coming from CerboGX using BMS-CAN.

I read post with same issue https://community.victronenergy.com/questions/65651/does-the-soc-assistant-condition-on-the-programmab.html , and tried to use same recommendation , that seemed worked in that case, so I selected "enable battery monitor", because the post says that doing so, SOC will be coming from external meter (in that case BMV) and not from internal SOC calculation, as all internal data will be replaced by the data coming from external control.

Well, I tried to replicate the solution indicated in post and it simply doesn´t work. The only difference I see is that in post SOC was coming from BMV, and inmy case SOC is coming from BMS. But cannot figure out why this could be the difference for my Assistant fails to take true SOC.

Any help to understand how to use SOC coming from BMS in a Multi II assistant ?

Note: Assistant and connections work fine and activate Relay when using other conditions. The problem is where SOC is coming from.

mito asked

0 Answers

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