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battery bms

BYD B-BoxPro, BlueSolar 150/85VE.CAN, and SmartSolar150/85

Good day,

We have an existing system with 3 MultiPlus 48/5000/70 (in parallel), 4 BlueSolar 150/85 VE.CAN, 2-BYD B-Box Pro 10 kWh, 1-BYD B-Box Pro 7.5kWh, and a Color Control GX.

One of the 4 BlueSolar had a 0 current reading, so we requested for a replacement. Since, BlueSolars are not anymore available in the market, they sent us a SmartSolar 150/85 as a replacement unit.

1.) How can we synchronize the SmartSolar to the existing 3 BlueSolars and what will be its connection to the CCGX? What are the needed accessories and upgrade to sync the charge controllers if it is possible?

2.) Can the BYD BMS communicate with the BlueSolar 150/85 VE.CAN?

Thank you.

harry-chavez asked
Guy Stewart (Victron Community Manager) commented ·

3 Answers

VE Lithium Battery Bank, Which BMS to Use?

Hi All,

I appreciate that this question may come down to preference, but I would greatly appreciate anyone's input on this if possible. My dad and I are currently installing the VE setup I've purchased for my liveaboard, which includes:

3 x 100ah Lifepo4 batteries

1 x Multiplus 12/3000/120

1 x BMS 12/200

1 x BMV 712 shunt

2 x Power In Bus bars

1 x Cerbo GX & Monitor

1 x Standard 105ah lead acid starter battery

70amp alternator

The Victron setup above was recommended to us by the agent who I purchased it from. Since then we have done a good bit of research on the Victron setup, and we are now questioning whether the BMS 12/200 is the best option for our setup... Would anyone recommend the Smart BMS CL 12/100 and or the VE.Bus BMS along with the Cyrix Li Ct?

The Smart BMS does not appear to limit the current draw of the house batteries which the BMS 12/200 does appear to do. The Smart BMS also appears to offer better protection to the starter battery..

Can anyone weigh in on their experience or opinion of these BMS options?

Cheers, David

daveybdublin asked
paul-2 answered ·

4 Answers

Pylontech BMS im Color Control?

Mein Pylontech BMS im Color Control suggeriert, das es den Lade- und Entladestrom der Batterie auf 111 A begrenzt. (3x US3000C)

Siehe Bild:


Schützt diese Einstellung zuverlässig die mitgelieferten Anschlusskabel (25 mm²)?

Gilt diese 111 A Begrenzung für of Grid und on Grid in einem ESS System?

Welch Absicherung sollte man unter diesen Bedingungen (Kabelquerschnitt) wählen, um diese Konfiguration vor Überlastung zu schützen?

Kann jemand bestätigen, dass man sich auf diese BMS-Begrenzung verlassen kann.

Danke und Frohe Pfingstfeiertage.

paragon asked
Matthias Lange - DE answered ·

1 Answer

BMS advise needed

I would like your advice.

Suppose your battery configuration looks like this:

16x lifepo4 cells of 3.2 v and 280 Ah in combination with a multiplus-2 48 / 5000-70.

Which bms could best be used in this system, and what else do I need (shunt etc)?

See different BMS modules of REC-bms, but lose the overview a bit here.

gijsvm asked
gijsvm commented ·

1 Answer

Battery upgrade?

I have an existing system that consists of:

  • 1 Multiplus Compact 12/2000/120
  • 1 BlueSolar MPPT 100/30
  • SmartShunt
  • 2 Battle Born GC2 100 AH batteries (parallel connected)
  • Raspberry PI running Venus OS
  • custom, manual inverter pre-charge circuit

I'm wondering if there is any advantage to replacing the batteries with Victron Smart Lithiums, and if so which BMS would be appropriate.

I've read that the VE.Bus BMS prevents inverter control from Venus. Is the same true with the Lynx BMS?

I believe the VE.Bus BMS will shut down the Multi (charge and inverter) but I believe it will NOT shut down the MPPT. Correct? So that means I'd need a battery protect for both load and the MPPT. Correct?

Lynx BMS documentation hints that it will control both the Multi and MPPT and can disconnect the loads so no battery protects would be needed. Correct?

Kevin Windrem asked
Stefanie edited ·

1 Answer

Low batt inverter cut out but soc is 70 percent


Our inverter in our rv often shows low battery when we come to turn our inverter on after it has been off for storage. The battery soc is still at 70 % and voltage at over 13 volts.

Our batteries are victron connected via bus to a digital multi control to a quattro an ccgx.

I don't recall this error.prior to installing the doc.

The error clear immediacy as soon as I connect to an ac inlet then I can disconnect the a.c. and inverter works as expected.

Can anyone help point me of possible causes

jaywolfe asked
jaywolfe commented ·

1 Answer

Centaur 12V 50A charger

I have a Centaur 50A battery charger which has stopped working. I have tracked the fault to an open circuit resistor, on the circuit board marked R116, which appears to be a current sense feedback resistor. I am having difficulty reading its value - looks to be 600 ohms, but that's not a standard resistor value. Grateful if somebody could confirm what value it is so I can source a replacement.


david-longhurst asked

0 Answers

Victron GX and battery LiFePo4 battery compatibility

I found on the forum the list of batteries with BMS compatible with Victron but it seems to date back to 2019, I think from 2019 to 2021 many things have changed, some products linked are not even on the market anymore.

I am intent on purchasing a Meritsun powerwall battery system to connect to my Victron quattro 10kw and Venux GX. I am concerned about compatibility.

The manufacturer of course says it can be connected without problems but that is of course the manufacturer's opinion.

To be honest, this company responds to my emails super fast, while another company like Pylontech listed won't even respond to a request for a quote.

Can anyone give me more suggestion?

aldo asked
tozz answered ·

2 Answers

Liontron BMS switches off when I switch on Phönix inverter

Hello to all,

I have a problem with the following combination of devices:

  • Phoenix Smart Inverter 24/3000 and
  • 2x 24V LIONTRON LiFePo 100Ah (parallel)

When I switch on the fuse of the 24 V supply from the inverter, the BMS of the Liontron batteries switches off immediately. I have found out that it is probably the capacitors of the Phoenix inverter that need too much power for the BMS of the batteries. Does anyone have a tip for me on how to solve the problem?

Is there any information on how many amps the Phoenix requires at initial start-up?

Attached is the technical data sheet of the battery.

Thank you!



xandafini asked
tozz answered ·

1 Answer

Skylla IP65 controlled by CAN-Bus via Cerbo GX configuration problem

Hi Community,

I have two Skylla IP65 paralleled and connected to a Cerbo GX via VE.Can and one "other" BMS for a LiFePo4 battery, also connected via BMS.Can with 500kBit/s or via the same Ve.Can bus with 250 kBit/s. Works both.

The Cerbo GX shows all three devices. Also the Cerbo shows values from the BMS for Charge Voltage Limit (CVL), Charge Current Limit (CCL) and Discharge Current Limit (DCL). I can see all three values in my BMS configuration tool also. Thumbs up!


Both Skylla IP65 don't react! I tried:

- Connecting only one Skylla
- Setting Parameter #31 BMS to "Yes" - which results in an error #67 "BMS communication lost"
- Switching DVCC on and playing with some parameters

No matter what I do - the Skylla chargers do what they want instead what the BMS wants...

Does anyone have a similar configuration up and running, especially with a Skylla charger?



bricki asked
Daniël Boekel (Victron Energy Staff) answered ·

2 Answers

Lithium battery bank (VE Modules) and Multiplus II

I know this question is bordering not relevant for Victron, but I may not be alone with this issue - and there are so many skilled techies here so I hope you can forgive me.

I just purchased 5x VE modules Samsung SDI 2,08Kwh, modules are configured in 12S cells 42Ah, so the voltage range is between 38,4v-49,2v.

I want to build a bank around 10kWh capacity, so the config 12S5P.

I have a Multiplus II 48/3000 wich I want to use, so the question is the voltage range suitable for the charger section of the Multiplus?

Attached an image of one module


Thanks in advance

xotet asked
xotet answered ·

2 Answers

ESS mode ignores BMS BMZ ESS-X control

I would like to ask if it is normal that ESS mode ignores BMS control from BMZ ESS X battery. Configuration 3 x MPII, 3 x BMZ ESS-X, MPPT 250/85, Fronius Symo and AC OUT1, Cebo. All devices have the latest version of FW. Unfortunately even if the BMS battery sends a parameter - CCL = 0A:




so the batteries are still charging. The charger is set according to the manual for BMZ = Absobrtion time = 1. Unfortunately = Absobrtion time is never one hour, even 7 hours at a time.


Status code # 3 should appear in ESS mode: BMS disabled charging, I've never seen it with BMZ ESS X in ESS mode. I run another 4 similar systems with BMZ ESS X and I have also never seen status code # 3: BMS disabled charging.

I'm worried about the batteries, about the safety of operation. I think I overcharge them this way and they could be damaged. Please tell me if this behavior is normal (the battery is not overcharging) or if it is an error. Thanks Ondra

ondra asked
Daniël Boekel (Victron Energy Staff) commented ·

1 Answer

Grid independent ESS

I have a multiplus ii 48/5000/70-50, DC PV array, Battery with built in BMS, MPPT and CCGX running ESS.

I want the system to run grid independent - using only PV and battery unless battery gets too low or load gets too high.

We have a very unstable AC input with large fluctuations of input voltage that result in regular inverter overloads and grid disconnects, even when the grid is available.

We have used the programmable relay assistants to prevent AC 2 out disconnect with the grid disconnections. (This is working well)

I want to use the Generator Start - Stop assistant to ignore AC input above a specified SOC and below a specified AC load. The point is to minimise exposure to the unstable grid input, but have it available when needed.

I have created the following config... not yet uploaded...




Will the assistants work together to give the outcome described above?

Is the order of the assistants correct?

Is there anything here that could cause damage to my system or electrical appliances connected to it?

guydusautoy asked
josefa edited ·

3 Answers

Smart bms cl 12/100 with non Victron lithium batteries
  • I've connected my Smart BMS Cl 12/100 into my system with my non Victron lithiums, my non Victron bms is connected to the remote switch to stop overvoltage.

The starter battery is above the voltage needed but I'm still not getting any charge into the battery. I'm getting an alert saying that undervoltage protection is activated even though its registering the Lithiums and starter above the cut off limits?

Is this because I'm using a none victron battery and the 2 bms cable aren't connected?

If so is there a workaround?

I would have used the bms 12-200 but my alternators neg goes through the engine.

chezgals asked
chezgals commented ·

1 Answer

Smart BMS CL12/100 System

Hello, I'm planning to install the Smart BMS CL12/100 to charge 2x 100Ah LiFePo4 House Batteries (with internal BMS), would like to check what else I may need to complete the system.

My Alternator is Balmar 100A with regular internal controller.

I'm planning to charge a 75Ah Lead Acid Wet Starter battery, and 2x 100Ah Lithium House batteries with the BMS CL12/100 unit, I selected the 80A Fuse which I believe will limit the charging current with approx. 70A to the Lithium batteries.

Do I need anything else do I need to complete the system? Other Recommendations?

Balmar has a couple of options for External Charge controllers incl. with Lithium charging programs if required.

Also, my shore power charger is a Victron Blue Smart Charger 12/25 unit already installed.
Anything else needed to use this with the proposed BMS and split battery types?

Suggested wiring would be great if available.

Thanks for help in Advance.


Craig Donnelly asked

0 Answers

Victron Smart LiFePO4 12.8V 200-AH Battery BMS Cables Damaged

I have a new Victron Smart LiFePO4 12.8V 200-AH Battery and moving it around I damaged the end of the integrated BMS cable. The threaded collar pulled apart and clearly needs to be rep[laced. How do I make this happen???

Thanks in advance!


dcarter asked
Stefanie commented ·

1 Answer

Camper van system wiring with BMS and solar

I`m converting an old fire fighter van to a offgrid camper.

I already own a BMS12/200, BMV, Shunt and MPPT from the previous owner of the vehicle.

I do not find a wiring diagram for the BMS with solar on the website.

Can an expert please check my diagram and give me feedback if that set up is correct and save.

Is the LiFePo battery fully protected against any harm by the BMS?

Is the Starterbattery protected from discharge and the alternator from overheating by the BMS?

Is it correct to connect the MPPT on the load side of the BMS?

Is the MPPT 75/15 suitable for 3x90Wp Victron Blue Solar panel in serial?

If MPPT connection on the load side of the BMS is correct, what fuse do I need on the load side of the BMS?

Many thanks for your help!!!

best regards



steve77 asked
dazey77 answered ·

2 Answers

12 volt wanted when lithium battery switched off

Can I get 12 volts via my multiplus compact when my battery is switched off but am still connected to shore power. This is so I can use the 12 volts on my RV without having to have the heating on to keep the battery warm, TIA

big-ste asked
big-ste answered ·

2 Answers

Easysolar power down via relay

Trying to provide battery protection for a diy lfp battery connected to 24/3000 Easysolar and wish to disconnect it from cells when issues arise around cell voltages. I have a battery protect on the dc loads for low voltage protection and have the charging parameters on solar charger and multi set for high voltage protection but nothing for individual cells.

I have found an individual cell monitor, microcontroller-based and uses two Solid State Relay (SSR) outputs to separately signal over-voltage or under-voltage conditions. Is this a means of switching off the Easysolar via the relay in the Easysolar? Any suggestions or additional info. Cheers, Bret

Easysolar 24/3000.

BP 220

Bmv 712

Digital remote

2p8s battery

bretto asked
bretto answered ·

1 Answer

How can I quickly get paid Victron installer help in the Las Vegas area?

greetings, Im currently in Vegas with homemade tiny house on wheels (box truck called the SnakPak) . Im in dire need for someone with Victron expertise to help complete the hook up of all my components ( CCGX, multi control, bms, battery protect, etc)! having issues currently with adding assistant to multiplus for the bms. I will more than compensate anyone who would like to help with $, Booze, etc. !!! thank you and I promise you will get a kick out of my build!! you can see my build @ spanky301 on IG :)

mark-pankey asked
nebulight answered ·

3 Answers

Off grid system - need guidance

Hi there.

Trying to size my system correctly with Victron products.

I am going to setup a 3 phase system using 3x multiplus II/3000/48V + 2x Smart Solar MPPT RS

I have a DIY 20 KWH battery with batrium BMS.

I will feed grid into the inverters.

- How will the multiplus act, if i pull more than 3000 watt from one phase? I see peak is 6000 watt, but there must be a limit for how long time it can deliver 6000w peak?

- What will happen if i install the system without a battery, for starters?

- Is it nessecary for the Victron to talk to my Batrium BMS - the unit should be able to measure the battery voltage by itself?

- Can i prioritize the system to deliver power from panels, before delivering from battery?

m1kkel asked
Matthias Lange - DE answered ·

1 Answer

Battery balancer 24v install


Hello I have looked around but cannot quite find the answer. I have a battery balancer to install on my bank its 8 12v 220ah agm in 24v config

My question is how to connect it up to the system. I have looked at the documents and am still some what lost

I assume it connects to plus on one side and negative on the other and then there is a mid point

From what I can see the mid point is a daisy chain along the plus on the 4 batterys

The plus and negative are as that connected to plus and negative no chain down the bank? If some one could help out I may still be sane by new year

ystwyth1 asked
Matthias Lange - DE commented ·

2 Answers

Old Multiplus 12/3000/120 with smart BMS CL 100/12 will it work ?

Having had enough of running my generator for hours and hours in the winter to get my AGM's to 100% charge ( summer no problem with my solar ) I have decided that as soon as I can afford it I am switching to 2 x lovely new 200Ah Victron Smart Lithium's .

I plan to use Smart BMS CL 100/12 as my BMS in order to integrate by alternator and also my Midnite solar controller .

The Midnite can be configured to accept the Charge disconnect output of the BMS but I have an old 2007/08 Phoenix Multiplus 12/3000/120 and not sure if I can shut down the charger and loads on this with the BMS , It does not have Aux inputs of the later models .

I don't really want to spend on a new one especially since my outlay on new batteries is large and the ole Victron is in really good condition and working fine so why bin it ? there must be a way of shutting it down ? can the Cyrix Li-Charge / Load be used for example and if so how ?

Many thanks in advance


Simon Phillips asked

0 Answers

ESS assistant with two-signal BMS support


I have a problem with the two-signal BMS support in the ESS assistant.
The two-signal BMS support is described very simple and clear in this document:

One signal input is used to allow charging/disable charging and the other input is used to allow discharging/disable discharging.

I selected "Disable charger" on the high-cell/battery full condition. When the BMS activates the input of the Multi, the CCGX shows "ESS #3", which means "BMS disabled charging". But the problem is, that the charger AND the inverter stop working in this case. This doesn't make sense in my opinion, because the battery is full and cannot be discharged, because the inverter is also disabled. So the system locks itself and remains in this state and cannot leave this state.
Then I switched the "Battery full"-input manually and could reproduce this behaviour as long as I wanted: The Multi is in inverter mode and discharging the battery. Then I activate the input and the inverter stops immediately. Then I deactivate the input again and the inverter starts again with discharging the battery.

When I select "Force to float" on the high-cell/battery full condition, the inverter is not affected and not disabled in this case. So this seems to work fine.

The "Battery empty"-input also works fine and only switches off the inverter, whereas the charger is not affected and still works.

I found an entry with the same problem form last year here:
In the first answer from May 27 '19 dunno describes the same problem, which I also observe with the option "Disable charger" on the high-cell/battery full condition, but there is now answer to his question.

Can someone help of the Victron team?

Best regards

tim84 asked
Victor Bonilla answered ·

3 Answers

Smart Battery Protect says OUTPUT DISABLED BY REMOTE

Smart Battery Protect says OUTPUT DISABLED BY REMOTE and because of that I can't use any of the 12V devices.

Can someone advise as to why there is no power going out to my 12V distribution board from the SBP100?

And the same why no power going to the Battery from the SBP200 ?

Both are saying that they have been "Output Disabled by Remote"

Many thanks

1. SBP100 for load disconnect


2. SBP for Load disconnect


3. SBP100


4. SBP200


5. BMV readings.


6. As you can see the negative voltage is coming to the negative feed of the 12V distribution. And 12 V positive feed going to SBP "IN" field, but nothing goes out to the loads.



8. SBP flashing lights


Mike Salaru asked
Mike Salaru commented ·

1 Answer

Does Victron Have BMS with Bluetooth?

I'm a Victron Fan and am building PV System for basic lightings.

Presently I have Victron Charge Controller 100/30 for 12.8V LiFePo4@200Ah storage Batteries configured in , as the series The batteries have Chinese BMS (Not DALY) that has no name, but Bluetooth system. I was very satisfied with the function, as the device indicated Charge/Discharge, each cell level and it balanced the cells constantly. My satisfaction was short-lived as the BMS became defective in 40 days. My PV system came to a halt, due to this reason.

This is the story.

Now, my need.

Does Victron energy have stand-alone BMS bluetooth built in? I know Victron Batteries have BT builtin.

Please point me towards the above enquiry.

Thanks a ton and best wishes.

K.J Kumar asked
nebulight answered ·

1 Answer

Connecting Lithium in parallel


I have an issue with a victron 150ah LiFePO4 (600ah bank of 4 at 12v) not balancing after several attempts. It balances after about 6 hours on hook-up via the multiplus 3000/12/120 but as soon as we boat off it won't balance the next time I charge via engine or geni/multiplus, and BMS shuts down due to one cell (always the same one) going OV at 3.76v

The guy (pro) who fitted the system (now unwell) thinks its a duff battery and has asked that I swap 1 and 4 over to see what happens (cell 4 in battery 1 is the issue)

Now having a look my black BMS cables aren't wired like anything I've seen.

All diagrams I can see the left black cable of Battery1 goes to the left BMS port; the right black cable or B1 goes to B2 left cable; B2 right to B3 left, B3 right goes to battery 4 left and lastly battery 4 right to BMS right port (a 4 battery version of this link

Mine goes B4L-B2R; B4R-B3L; B3R-B1L; B2L-BMSL; B1R-BMSR

I can't find anything wired vaguely similar ANYWHERE. The only possible reason I can see why it was done this way is that my left hand black cable is too short to go to the BMS left port and needs the 2m victron ( extension cable

Q1) is my wiring enough to mess with the cell balancing?
Q2) should I buy the extension cable and wire it as per the diagrams I can find regardless of whether I have a duff battery on not?

james-ward asked
Stefanie commented ·

2 Answers

Smart BMS CL 12/100 load and charge disconnect

Can I control several devices with the Smart BMS CL 12/100 with the "Charge Disconnect" and "Load Disconnect" plugs? In the manual there are several examples but only with one device. But I need:

"Charge Disconnect" = 2x SmartSolar MPPTs, 1x Multiplus 800VA

"Loade Disconnect" = 1x Smart Battery Protect, 1x Multiplus 800VA

Here are the instructions:

Thank you very much for a short feedback

Many thanks Gabriel

gumpi asked

0 Answers

Wiring diagram for a van install with multiplus II


After reading a lot those last weeks, especially here, (what a great help this community is !), I've come with a wiring schematics for my new van installation.

Years ago, I've already made a van installation with Victron lifepo4, BMS 12/200, BMV 712, battery protects and all went very well.

Now there is a lot of new products, protocols etc and I think that this wiring is the best I can think about.

I want it to be the simplest possible, with the less components.

I do not want to install solar at the beginning, I think I can only rely on the buck boost (I've a 250A alternator). I will maybe add them later if needed.

I used as a basis, the Victron van install diagram:, removed un-necessary thing, added the Multiplus II 24/3000 and removed:

- Battery protect (charging)

- External temp sensor

- Isolation transformer

- AC detect (included in Multiplus II)

Do you think that this way the low temp security of the BMS will disable the charging from the Buck Boost, MPPT and Multiplus ?

Did I forgot something?

Do you see a better way to do it ?

Thanks a lot

(Tip: click the image link under the image or right click/open in a new tab for a better, full size image)

edit: 1) "typo" of the purple cable from BMS to MPPT 2) replaced the to usb cable by a cable to the GX


sebcbien asked
sebcbien edited ·

2 Answers

Solar charge a empty lithium battery?

Hi, in my caravan I have installed a 275w solar panel, a Victron 100/30 solar charger and a 0Ah Lithium battery. Two times now has the battery been so low that the BMS has turned the battery off.. But next morning when sun was back a volt monitor (shunt) displayed 29V but battery was still off. I had to connect a old charger to start it, then the victron charged the battery to full.
Can i change some settings in my Victron mppt charger so it can start the BMS so the battery can be charged again without me have to connect another charger?

freddy-1 asked
trip-tracks answered ·

1 Answer

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