How to connect your BMS to Victron Venus OS. Easy setup and works with JK, JBP, DALY and Heltec.

[@izakburger1580]

As the guy who coined the DVCC acronym, I'm amused by your response. Well, I came up with the term, and my Dutch colleagues helpfully turned it into an acronym.

[@mattdabovich7685]

Again Andy. Hats off for sharing all you learn. Even when you don’t see the need. Super happy to see BMS details remotely.

[@OffGridGarageAustralia]

Thanks for your feedback and support, Matt!

[@rahsomali]

This probably is the most looked after topic since everyone has BMS that only works locally. Seriously please make video of this for each BMS manufacturer, way to go bud

[@louisbellanca9293]

Awesome work my friend - just set my VENUS PI up with my JK. I never would have known it was possible before Andy. Thanks "mate" Also 1 important bit of advice is that you do NOT NEED to connect the ground to the adapter since 485 is a balance signal - so this will eliminate the ground loops if BMS isloates.

[@extremeacc101]

Once Louis sorts out the multiple BMS interface/software this will be a game changer I believe. For now it’s the use of an external shunt. Thank you Andy for all your work on this a very awesome tutorial.

[@andreasziegenfeldt8319]

Is it not possible to connect more then one JKBMS at the time?

[@waltsteinchen]

@@andreasziegenfeldt8319 I have connected 2 JK BMS's and they seem to work. Only problem is that they both show up with the same name in the device list ... did not find an option to rename them so far ...but otherwise I think the driver is great!

[@freeranger1677]

@@andreasziegenfeldt8319 JKBMS now has the option for changing the device address in the app advanced settings. This may make it possible to use more than one JKBMS.

[@professional_hackjob]

Does it aggregate the totals for showing a combined SOC in VRM?

[@martijnheeroma5492]

Got this working some time ago, DVCC limits the charge current, how it is limiting is editable in Louis his script. So happy with it, Victron fan forever, send Louis a small donation for his great work. Thanks for the clear video

[@melvindevries_nl]

Do you mean that if you have (I will be using a 230A alternator) 2 Victron DCDC chargers of 50A each for a CATL self-built battery that consists out of 8 cells and has 2x 300Ah the BMS will charge at 100A towards 2 batteries? (50A per battery). Or should I configure the battery as one that has 600Ah capacity and have it accept 100A charge current?

[@martijnheeroma5492]

@@melvindevries_nl with Louis his script you can connect you're bms to VenusOS if you can't with CAN

[@tacotuesdaytj5683]

Great video! Used your instructions with no issues. Purchased the converter from Overkill solar for my BMS, plugged it in, immediately recognized and showing data. Thanks again!

[@markdavidson6321]

Another of your videos that is going to cost me money. 😄Thanks for all the hard work deciphering this stuff and getting it to work. Huge time saver for the rest of us!

[@daviddecker264]

I'm blown away. I didn't know about these configurations. Good job to show details that work and how to troubleshoot.

[@AussieAustrian]

Thanks so much Andy. I work overseas and am gone for anywhere from 2-4 months at a time. This has convinced me to go off grid with confidence that I can manage all my BMS’ remotely. Thanks so much again.

[@OffGridGarageAustralia]

No worries. Be aware, you can only read the BMS information but not remotely change them.

[@AussieAustrian]

Thanks Andy. Do you think this may become a feature of the next generation of BMS’? Having both Bluetooth and WiFi access to the BMS through the app? It seems to me that a WiFi BMS with the functionality of the JK-BMS with the balancing power of the Neey balancer would be the ultimate solution.

[@OffGridGarageAustralia]

@@AussieAustrian I don't know. It also adds some complexity to your system. And do you really need to know what your battery is doing if you're not at home? Once it is all setup and working, there is less and less need to have all these information from anywhere, I guess.

[@PeterMilanovski]

Another excellent video, well done Andy! There is no better channel regarding solar energy anywhere on the internet than this! I will be travelling up to Sydney in a week, for a week (two weddings).... And when I get back to Melbourne I will begin to save money for an AliExpress rackmount battery and this video is exactly what I needed to get it connected to the raspberry pi... Thank you so much for your time and energy that goes into whatever you do, it's always much appreciated...

[@Shep5847]

Im happy to see you finally give the integration a try! I’m glad that was easy for you. Batrium works natively (without Venus mods) and can handle many different battery packs at once and report as a single storage system while still giving individual pack and cell visibility. It can also handle 500 or 1000amps depending on the shunt you choose to get with it. I highly recommend the 1k version. It works much better with large cables. Would you like to try one? I might have one laying around that I can ship to you to play with. Also if you turn on “Has dc system” in the VenusOS, then you’ll get the little marching ants showing a charge coming from a dc source that is not part of the victron system. I.e. your desktop charger.

[@excillisbank2611]

Une recherche sur l’interaction avec les BMS et une présentation impeccable ! merci ANDY

[@jasondevine6014]

+1 for node red. Should do a video about this now. Also maybe a mention of the ground.connection if you turn off a battery with the BMS connected still. Great video. Good to hear the Venus does charge controller control.based off the serialbattery driver.

[@sorinnicolau6584]

Thank you Andy for all your work on this a very important job..well done!

[@OffGridGarageAustralia]

Many thanks!

[@edwardvanhazendonk]

Extremely helpful, thanks for sharing and the work involved!

[@daolinhai]

Before yesterday I finally finished my 2 battery banks of each 16x23ßAH CATL cells and plugged the 2 JK BMS into my Cerbo GX with the 2 adapters boughts months ago, when I've seen this video. It worked like a charme, the Cerbo found them immediatly. Thanks for your work. Just the SOC the JK sends is far off the reality but I think this is depending to the really flat voltage curve of these cells. I dont care about that. For testing I switched the balancing on, the cells are at around 10% soc and the difference in voltage has been around 0,020V. A few hours later, they have been perfectly balanced. Now I'll go with your setting at 3,45V for balancing.

[@OffGridGarageAustralia]

Thanks for the feedback. Great success! You definitely want a smart shunt or BMV to measure both banks together. The SOC is always off in my JK. But also in the Heltec and Overkill BMS. They are all different 😂

[@daolinhai]

@@OffGridGarageAustralia Thanks. I‘ll watch that a few cycles and decide then, if its important for me or not. The Multi works anyway with its own parameters above my JK shutdown settings. We‘ll see.

[@daolinhai]

@@OffGridGarageAustralia So. I ordered the Smartshunt. And then I‘ll disable the communication between victron and JK. The JK lowers the charging current far too early, my batteries would never get full this way.

[@OffGridGarageAustralia]

@@daolinhai Yeah, the communication of these BMS is not great as we know. They kind of work but are not reliable. The Smart Shunt is the better alternative to measure SOC correctly.

[@OckertM]

Andy, first time commenter here. I've watched alot toe most of your off grid garage videos the last 2 months. The "van der Walt" part was good but the name is like Loo-ee (I'm also from South Africa) Keep up the great work! Looking forward to every single new video while I watch some more older ones😎

[@izakburger1580]

Indeed. Louis is technically a French name, so you pronounce it exactly like you would the name of "King Louis the whatever'th". The surname is indeed Dutch. Why does he have a French/Dutch name? Because he is South African of course. (And yes, if you recognise my name... yes I am that guy).

[@jimjones7821]

lekker man

[@servisfibris6679]

Top section voltage and bottom section voltage is the upper and lower half of the battery from which you can calculate mid point deviation. So as you have 4 cells, then top is first 2 cells together and bottom are cells 3 and 4. :)

[@rudisoft]

Thanks a lot! I installed the driver right into a Cerbo GX device and it works! Still have to figure out the node red running on another Raspi though.

[@OffGridGarageAustralia]

Thanks, same here, haven't done any Node Red programming yet. Not sure if it is necessary or beneficial...

[@hudiny1626]

Your videos are very good. I was also inspired, and I will also do the BMS connection that you showed here. Keep up the good work!

[@keyem4504]

The GPS port on the JK BMS is in fact a TTL serial port. Your black box is a TTL to rs485 converter. You could have used a ttl2usb converter instead of the two converters you used. You would have to supply power to the converter, however. And a warning: The rightmost pin is connected to battery +, therefore you have battery voltage there!

[@bishwagit]

@Andy please try this suggestion. If you succeed, it will be a game changer

[@patrickcourtot6417]

Right. I just only cut the cable and connected it directly to a TTL to USB and everything is working fine

[@FutureSystem738]

Thanks as always Andy… Great stuff, maybe something I’ll look at later in my project. There are some clever people out there, waaay above my level.

[@bbrown_sc]

Thanks for reviewing Louis' driver. Look forward to the CAN bus Seplos equivalent. BTW SA was settled by the Dutch.

[@izakburger1580]

Indeed. And a bunch of French people came here too (The Huguenots) . And some Germans. And the Brits were involved as well, as they always are. And for a really short period the French had control of the Cape too, before the Dutch got it back. Control over shipping lanes were important back then. So that is why you have a guy with a French name and a Dutch surname 🙂

[@jimjones7821]

​@@izakburger1580 ag nee man - its all lekker bru

[@danieldewindt3919]

Grate explanation. I was completeley new to this all. Didn't expect it to work kind of out of the box 🎁

[@JHies111]

Hi Andy, i´ve made the installation on a Cerbo and it works perfect. Thanks from France

[@extremeacc101]

Yes yes yes. I am so time poor and I’m glad you have been able to get this done. I have been trying to get this happen for so long now. Thank you Andy for this. I’m sure Paul Will be interested in this also. I know moving forward I would like to use this feature for my set ups.

[@theboov3110]

Thanks Andy, again a perfect story. I have ordered the Victron Cerbo GX to optimize my off-grid system. Hopefully connecting the BMS to the Cerbo GX will incorporate the info to manage my system. BR Peter.

[@christophe3195]

have you managed to connect the bms directly to the cerbo gx (without the raspberry). thanks

[@martinmooren9536]

I installed my smartshunt last week... 😄 Danke for another interesting video as always!

[@OffGridGarageAustralia]

You're welcome, Martin.

[@wideawaketotruth5301]

Absolutely brilliant Andy. You definitely rock my friend! Thank you so much for taking the time to put this video together. Cheers 🍺 Rick Fort Worth Texas.

[@svenwilhelmi5054]

Thank you for another great video. As others have already described, it also works without the RS485 converter. Greetings from Off-Grid-Germany

[@DaleDaschner]

Andy, there is an amazing software you should look at that runs on a raspberry pi. It’s called solarassistant, it’s also created by South Africans with an amazing level of detail from inverters/batteries for data collection with full control of your inverter. Excellent product. Highly recommend.

[@OffGridGarageAustralia]

Thanks a lot for letting us know. I'll definitely have a look. Sounds interesting. Edit: Does not seem they support Victron...

[@dabbsy81]

I also use solarassistant, its been plug and play for me with 2 inverters, 2 jbd bms. Integration into homeassistant is also excellent, your able to change inverter settings using automations. No victron support except for the smartshunt. Developer is very responsive so he might be working on it.

[@DaleDaschner]

@@dabbsy81 absolutely, it’s an excellent system.

[@zzyrc842]

Moin Andi, very interesting video! But be aware of ground connectivity: Ground on your BMS communication port will be B-, simply because these interfaces should also work when the BMS has shutdown the battery. Ground on your inverter or DC/DC converter is P-. So if you connect both your BMS and inverter to the same raspberry pi without using at least one USB adapter with galvanic isolation, you've created an alternative path for the current to flow as soon as the BMS turns off the battery. This will surely fry at least one of the components in the path. So be careful what you connect.

[@danielvanaalst2460]

Unfortunately that is very correct. This is the reason my rapberry pi does not work anymore. The BMS tripped, and the Raspberry died by trying to handle 290A... Maybe an isolated serial converter would be cheaper at long term ;-) greetings from Germany from someone who's waiting on his spare raspberry ;-)

[@nunopalma2830]

Learned this the hard way ... have now two USB to RS485 devices broken , hope they are the only thing that got broken ...

[@rodneyhrytsak3407]

Can you please recommend a suitable USB adapter with galvanic isolation?

[@matthewsmith4219]

USB to TTL 4-pin Wire specification: Embedded convertor: PL2303 Connector: USB Type-A plug, 4-pin 2.54mm pinheader Pinout: Red - VCC (5V) Black - GND Green - TXD (3.3V TTL, connects to target RXD) White - RXD (3.3V TTL, connects to target TXD) Length: 1m

[@airkopter]

Hallo Andy. Vielen Dank für deine genial gut erklärenden Videos. Lass dir dein Bier schmecken. Gruß von Frank aus Hamburg

[@ghurkas123]

Love your videos! How would one go about to connect to a proper Cerbo GX and not a PI? Still with USB in the same manner?

[@christophe3195]

do you have the answer to your question? thanks

[@ghurkas123]

@@christophe3195 Sort of but not really ;-) still curious though.

[@upnorthandpersonal]

That adapter is actually a mess: it contains an entire microcontroller to convert the TTL signal coming out of the BMS to true RS-485. Then you need the USB adapter to essentially convert that RS-485 signal back to TTL... I told Nami they should just provide a simple TTL-USB module and be done with it. You can also make a cable and use a TTL/USB adapter and skip their RS-485 adapter.

[@gavinnoname1424]

That was my approach to. Purchased a connector for the JKBMS port and connected the three wires to a USB TTL adapter.

[@dennisrohrich6006]

Do you have links to the plugs and converter?

[@gavinnoname1424]

@@dennisrohrich6006 I remember doing allot of searching to find the connector...its not a JST connector which is what most people will initially think. the connector for the JKBMS is a Molex PicoBlade. Then you just need a USB to FTDI/TTL adapter. Then connect the three wires (GND, TX, RX)

[@alexanderp.8075]

Yes, I only use a simple TTL adapter that is connected directly to the BMS. since the rs485 adapters n did not work.

[@GarethJones-dk9yp]

@@alexanderp.8075 could you share a photo. Ive got mine connected via the jkbms adaltor and then the waveshare. to me it didnt seem right.

[@evanelder9995]

Would love to see CAN Bus working if you get a chance to make a video covering that. Very helpful though, thanks

[@Dutch_off_grid_homesteading]

Heya, nice that there is this community whitch help those who needs help

[@justinreynolds9669]

Tried this out and found out that with multiple types of BMS like I have on my system that the smart shunt was the more accurate method. Unplugged it from my PI and plugged it back into a pc just to every now and again monitor the BMS

[@repairman2be250]

Andy thanks you for another very well presented with excellent information / howto video. At minute 30:51 I thought what a nice emergency beacon that is.

[@upper_deck]

Hello Andy, I am an avid follower of your videos and am always waiting for the next one. - I hope you find time to answer me, because I know that you get a lot of comments in the block due to the many followers - I have a question about the different BMS solutions that you have presented and some of which you are also using yourself . I built two 24V batteries, each with 8 EVE280Ah cells, and decided on the Jaibada BMS with the "thick" relay. I have these batteries running in parallel. Unfortunately, one of these BMS has failed. It can no longer be set to 8 cells and therefore reports low voltage to the cells that are not present. I've decided to replace this BMS but don't want to use the JBD BMS anymore as I'm not that happy with the relay solution, although galvanic isolation also has advantages. Now to the question: Which of the solutions you are using would you recommend as the best? My requirements are 24V (8 cells), max. load current 100A, possible connection to VenusOS and iOS and satisfactory balancing. I also use a Heltec balancer. - I would be happy if you could give me a tip. - Ich danke Dir schon mal im voraus für Deine Antwort.

[@larswittenberg9904]

Hallo Andy, erstmal Danke für deine tollen Videos ich sehe sie gerne und verfolge es sehr intensiv. Hab mal eine Frage geht ein JK bms auch ohne Akku nur mit einem Labornetzteil um die Verbindung zwischen Cerbo gx und JK herzustellen?

[@ktacatalin3715]

Hi Andy. I'm currently having JK BMS (24S variant - 48V) connected to Raspberry Pi with just a simple PL2303 module through GPS port as well, and not with RS485/CAN port. I don't have all your fractional modules to get USB-RS232 TTL conversion, but PL2303 only and solar assistant environment(which is working great). Nevertheless I will soon migrate to Victron environment and my assumption is that JK BMS & PL2303 setup will work with Cerbo because I know already works with solar assistant. My question is if the driver (that you've installed) doesn't affect in any way the Victron system functionality...Thanks.

[@bjornemmy]

Nice! If i knew this when i started i might never have gone the Batrium route, do 't get me wrong its a amazing piece of kit, but premium pricetag aswell... I understand the raspberry is a budget or a "opensource" choice, the Cerbo is a bit more expencive i Guess but it hase loads of features that make it cheaper then the raspberry if you need them, sensor inputs, relais, etc.

[@megamoosecat]

HI thanks for this wonderful simple channel. I'm new to this and I'm trying to install a Campervan solar system. I see that you are connecting a BMS to a RPi except none of them are inside a sealed lithium battery. I have built the raspberry pi and want to make all the connections. I know I'm sounding a bit stupid here, but the Eco Worthy batteries are not smart. They will be connected to a Victron smart charger controller. How does the BMS turn the battery off in case of low voltage disconnect. Is it through the plus and minus connects? As I'm using Eco Worthy batteries with JBD-HP28SA BMS what type of RJ485 connectors will I need to connect to the RPi, will victron RJ485 to USB work? I'm confused because I fitted an EPEVER BN Tracer controller with an MT50 display, this seemed to work, but if you're connecting an inverter to the battery how quickly can a solar controller switch off the battery through the BMS. I just seems that as the display has comms to the controller but not to the battery (no wires) how does the BMS know what to do? Again for those not to bright people who are not going to open up their batteries to try and connect a BMS physically could you show how to do this with a sealed non smart lithium battery and a raspberry Pi? Many thanks

[@typxxilps]

no SEPLOS at all or just post poned for the future ?

[@matthewsmith4219]

Waveshare Industrial USB To RS485 Converter with FT232RL Chip works a treat

[@matthewsmith4219]

The plug for JK bms comm is 4 pins micro Jst 1.25mm pinch --------- jks Rs485 port is actually a TTL uart that is turned into rs485 with optional converter so you can directly connect a ttl to usb converter it works with Victron Venus os Raspberry Pi tested with jk B2A8S20P 😊

[@Jannes54321]

great bit of information, thank you very much! I will investigate this aswell as soon as my JK B2A24S20P arrives.

[@paulsharp1712]

Which ttl convertor?

[@arturkarwowski1163]

Thank you Andy for next good film, I have a new cerbo gx still under warranty or can I also connect my jkbms?

[@krzysztoforlowski6010]

Andy, does the BMS has to be connected to Raspberry or Cerbo during the installation? You video implies that you installed the driver first and then you connected BMS after restart. Is that correct assumption? Thanks

[@titoholder755]

Great Video Andy So informative. I heard you said this setup can work with any BMS which uses the Xiaoxing app, I have a Qucc BMS which uses that app. Before I go order a Daly or JK Bms can you verify that the Qucc works with this setup.. Many Thanks and continue filming.

[@PeterAguirre-tc2wv]

Do you still need raspberry pi and all those connectors? Or has it been simplified?

[@martinaupperle220]

The two BMS show different SoC initially. It would be interesting to see how "smart" they really are in determining the correct value (whatever "correct" means) and how long that takes.

[@MrRickjamez88]

Note that connecting the Daly bms using the UART to USB cable will create an earth link. If the bms disconnects the main earth, the entire load will try to run through the small earth in the UART to USB cable.

[@Darkbluesstar]

You're right! Several months ago I found a warning (in the WWW) ...AFTER my min Voltage went to 2,5V (panic!) After that (cells are not completely damaged but loose capacity) I cut off GND of the DALY to USB cable (it works without at my installation). Never checked this again, but looks like that DALY only CUT-OFF "- pole" OR did not recognize very low power consumption. Keeping a DC-DC converter (for Raspi) to Plus and Minus out of Batt (outside Daly) while connecting UART to USB (with GND) the Raspi works again without real Cut-OFF (my problem during COVID I don't recognized early enough) With the cut of GND at the cable I never tried again to test ( but I created some additional " Secure Cut OFF" scripts to shut-down my inverter at 20% SOC, OR shut OFF at min cell voltage at 3,15V) And yes ....using IObroker (separate) as additional control of Venus (provided by NodeRed on Venus to IObroker)

[@MatejUram-y6z]

Hi Andy, thanks a lot for this video. I tried to connect daly to cerboGX and I wasnt succesfull. Now, I know how. But q about battery. I have 16 cells in my home as battery connected together with Daly BMS, but becouse this didnt work, I use Victron Shunt. Many times I cant see real SOC. For example, based on volatge SOC it should be on 95%, but it is only on 65%. Do you know what can be wrong? One more q: I am using 3 x Victron Multiplus II 48V/3000VA/35-32A on 3 phases + MPPT from Victron as well. When I have 52.2V in battery /whitch is SOC on 50%/ and I turn on oven with 3400V consumption, battery felt on 49.5V immediately /sometimes even less/ and I have to take energy from the grid. Its happening in your case also? Or it is because I don't have proper info about battery in Cerbo? Now I am thinking to buy next 16 cells /same producer of LiFePO4 - EVE prismatic/ and connect it to my system, because I want to change my Multiplus 3000 for Multiplus 48V/5000VA/70-50A. Will be 560Ah battery enough for this system? It is better to keep as 2 different batteries like in your case, or will be better create on 560A battery (Iam using my actual battery for 6month already? In case that I will use as one battery, I have to connect my 16s Daly BMS on 2 cells instead on. It will be not a problem with balancing? Will I solved it also issue with battery softness?

[@dabo5068]

Hi Andy. I have a question. Do you consider to try with some chinese inverter to see if it is working with Venus Os ? Thanks and have a great day !

[@OffGridGarageAustralia]

They won't work with Victron as they don't have any compatible communication ports like VE.Direct or VE.Can. Such inverters don't even show up in the system. Only a few do, I think SMA and Fronius are compatible.

[@dabo5068]

Yes I know about Fronius. It is compatible with Victron. Thanks for your answer 👍🏻

[@Elektronik-EXTREM]

Thanks! your video helped me a lot! what happens if the BMS breaks the minus? Does the current flow through the communication cables? does it make sense to equip the BMS with a USB isolartor?

[@RolandOfGileadOnYT]

Great video, turns out I have a few of the parts required. When using an inverter/charger (230V), I've noticed the current reading of the BMS fluctuates wildly, a known problem. Will using the BMS as a battery monitor mess up the results for the GX? The Victron shunt doesn't suffer this problem.

[@alexanderp.8075]

Thanks Andy for the info that the jk rs485 adapters are different. I have two here that you say are for the 4/8s BMS. and they don't work on the 24s BMS. I'm pretty sure that one of these adapters roasted my connection port on a BMS. so take care

[@nicovankampen4206]

Enjoying your videos! Starting wit my ESS also. Have bought my first JK BMS. Are you sure you need that thingy from JK in between your rs485 to usb and the connector on the BMS. From what i say elsewhere (can't find it at the moment) you only need a 3 wire connector to the RS485/USB dongle.

[@OffGridGarageAustralia]

Yep, that's what I said in the video.

[@simsondude3519]

For the JK B2A24S15P you need to connect the RS485 adapter to the GPS port as well. See port description on Ali page of JK BMS. Very confusing ;-> Thanks for explaining it in general.

[@neilwrightson5660]

Hi Andy, loving your videos. I'm a local from Newcastle Australia. I want to put together a lithium system for my motorhome. It currently has a system with a 200W solar panel and dead controller, two dead 100AH 12V AGM batteries, Dc to Dc converter. I was looking to change out the solar panel controller for a Victron MPPT unit. Where do you buy your Victron equipment from? And add a 4S/8S JK BMS. Can I use the original AGM charger to charge 280AH Lifep04 batteries?

[@milan2931]

Regarding switching the JK BMS on and off without an external 5V battery: install a pushbutton switch on the connector for LCD pin 1 and 2 (pin 1 is on the left side). Hold for 1 sec and the BMS will switch on. If the button is held for 5 sec, the BMS will switch off.

[@OffGridGarageAustralia]

Fantastic info. Thanks a lot for sharing this here, much appreciated.

[@edwardvanhazendonk]

I think with RS485 you can have multiple BMSes on the same A + B, or does the software not support this? Will try myself in a while and will support him!

[@martijnheeroma5492]

doesn't work

[@pbasista]

The RS485 standard was designed with support for multipoint communication in mind. However, the protocol which is used on top of it also needs to support that. One of such protocols is the openly-published Modbus protocol. It is has a concept of device address which is part of most messages. Since the communication medium (the RS485 bus) is shared, all the devices listen on it all the time. But they only reply back if the device address in the transmitted message matches their own configured address. Given the Modubs protocol, if there are multiple devices connected to the same bus and if they are configured to use different addresses, then they can all successfully communicate to the server device (i.e. the device which sends the initial messages). This in effect means that if those devices are made aware of each others' addresses, they can also transmit the initial messages (i.e. act as a server) and communicate between themselves. However, many BMSs, such as the JBD BMS, use custom, non-standard communication protocols over RS485. Such protocols often do not have a concept of configurable address. And therefore, if multiple such devices are connected to the same RS485 bus, they would all try to reply to every message that is transmitted there. That would result in interference which would make it impossible for the server device to successfully receive a comprehensible reply. Therefore, if such protocols are used, the communication between a server and multiple client devices is effectively impossible in practice.

[@gavinnoname1424]

@@pbasista does RS485 also have the termination resistor like CAN? With CAN you need a 120ohm resistor at each end. The BMS have these on-board making the assumption that they are at one end and the inverter is on the other. If you connected two BMS each with 120ohm resistors enabled (Plus one on the Venus device) connectivity may not work

[@sergea1138]

Yes, except that jkbms rs485 protocol doesn't support address, so you can't target a specific device on the bus

[@pbasista]

@@gavinnoname1424 Yes, it is possible to use the termination resistor. The details are on Wikipedia, for instance. But in my experience the open-ended topology is reliable enough as well, at least for short cable runs (~5 m).

[@swenhess3964]

Hi Andy Which driver should be installed for the Daly BMS? Do you also know a solution to display the data in iobroker? Thank you very much for your help!

[@baygon12]

Hi Andy first of all, thanks for your very informative videos. Do you have any idea how to increase the bluetooth range on the JKBMS?

[@wayne8113]

Thanks Andy, and thank you Louis

[@pulith5220]

Hi great video but some times i think you cant connect bcz CAN port of the bms and inverter has to hv the same protocols but sometimes they don't match atleast mine don't. I hv a darly bms n my inverter is a EASUN n they both hv CAN but the protocols are different that's what I hear so it's unable to connect to each other. SO ON OTHER NEWS.... what happened with the electrician what was the feedback that you got. Never heard the feedback you got about the heltec BMS if it was able to be calibrated.

[@ppi57]

Hi Andy, can you maybe do a "short" on how to go about updating the JK BMS firmware and iOS App... and maybe a tutorial on DVCC... my. mind boggles on reading the instructions. Thx for all you do; Subbed.

[@Benn19840425]

Thanks for the Video. Is it also possible to use the CAN/RS485 port to connect JK BMS to Cerbo GX instead of using the GPS port?

[@OffGridGarageAustralia]

From what they told me, they have modified the BMS for the 4S version and therefore the GPS port is now the comms port. So the actual CAN/RS485 port at the BMS is not the comms port any more. That makes so no sense at all. I've got a Cerbo here now and will do more testing with the communication. Doing all this on a Pi seems not very beginner friendly.

[@benystark6299]

It's already 1 year since you published this video, so I'm pretty late with commenting. However, it's interesting to see the Vevus OS on a Raspberry, however I got an Cerbo from Victron and wonder if I can use the serial connection between my JK-BMS (8-24 batteries) and the Cerbo directly like I connect the two Victron chargers (150/35) with the VE-direct cable. It's also a serial connection. Does the Cerbo-S GX "talk" with the JK-BMS directly?

[@massimoactis1474]

Hello, I have a raspberry with victron Venus OS a question the bms of the daly can I connect it with the USB cable r485? Does the cable go with all 4 wires?

[@sondt308]

Let me ask, I want to read data from JK BMS using USB to RS485 as shown in the video. Because I read the company's documents, I have to send a command line and then JK BMS will respond to the data from the battery, right?

[@paul9300]

Do you know the voltage level of the Daly RS232? Is it 3.3V, 5V or even 12V? I'd like to test the communication with the converter I own (USB to "normal" PC RS232) and don't want to destroy anything. BTW: Thanks for your great video, I especially like your slow and clear way to explain things.

[@haissam9999]

Hello Andy Two days ago I installed the dbus-serialbattery on jkbms successfully. Before that I had the smart shunt from Victron. However, I noticed that VRM no longer shows the consumption as before, although there is comsuption. Do you have an idea why? Did I do something wrong or is it VRM? Did this situation occured to you also? I made two screenshots from the last 30 days (with the smart shunt) and the last two days with the new installed dbus-serialbattery. Unfortunately I can't post here any screenshots. I can send them to you though. Let me know where to send.

[@jackoneil3933]

Thanks Andy. Are you aware of any way to display real time data of your system on your website from Victron VRM Portal Dashboard so we could watch your system in real time? That might be a draw for your website and interesting for the rest of us.

[@extremeacc101]

Yes Andy Invite me as a VRM user please. I do not need to be granted full access though 😂

[@ericdos9680]

Hello for the New jk bms PB2A16S15P version it is the same process? I think we need a hoser cable or adapter ? If yes what is it? Thk for your answer.

[@zelektroelektrotechnik7933]

Moin Andy, vielen Dank für das top Video, Grüße aus Stralsund

[@tvtotal4563]

Hi Andy, I‘m still waiting of a Video about QUCC BMS an Victron communication. Did you test something with QUCC in the Future? Regards Wolfgang

[@andrepallotta8633]

Hello wonderfull video. I bought the same bms i d like to connect with a computer with rs485 and jk computer software. Did you do ? Could do a video about rs485 connexion ? Where to find last firmware ? Thanks.

[@ChapuzasconRober]

Thanks for the video. I hope he can remove the limitation of one BMS (I need for 16 😮)

[@giuseppevillella9445]

Ciao Andy , ottimo lavoro come sempre bravo. Puoi fare un video sul Cablaggio del conveter USB RS485 per versione BMS seplos 3.0 . Comunicazione BMS software pc .

[@MikeMyFox]

Hi Andy, i love your videos. Du you have a pin layout for the JK -B2A 8S 20P? For the Display Port and/or the RS485/CAN bus Post Yes you told us all in the video that we should use the Display Port for the RS485 Communication, but my JK has a printing on it with "CAN/RS485" so i am thinking that they got it right with the newer ones? But nevertheless i really need a pin layout, would be great if you have one Thanks a lot and keep on you good work Michael

[@ragohy]

Hallo Andy, Danke für die Informationen. Habe Deinen Kanal sofort abonniert. Sehr sympathisch! Grüße aus Unterfranken, Würzburg 😀.

[@andkirby7]

That's really piece of work! Really good job! Can I ask please you, can I simply connect Cerbo GX::USB RS485/RJ45::Battery ? I have only RS485/RJ45 and RS232/RJ11 on the battery.

[@OffGridGarageAustralia]

Thanks Kirby. That should work with the USB to RS485 adapters as long as the drivers are installed and the BMS is supported by the driver. Daly, QUCC, JBD, Overkill, JK,... all work. You can always try and buy a cheap USB-RS485 adapter and install the drivers on the Cerbo. It depends on the BMS you're using.

[@leblancexplores]

Is the Cerbo GX worth it or is it better to just get a raspberry pi?

[@nielsdelrue7242]

Hi andy i am looking to connect my daly bms with the cerbo gx now my qeustion is can you do that with multiple battery's that way ? I have now 2 48v 304ah battery's that i wil connenct that way maybee later even more battery's. I hope you have the answer for this. Thanx

[@lecramred4453]

Thank you Andy, it works!

[@peel1e]

This is nice, but, at the moment i have my JKBMS being polled by a RasPi updating all the cell voltages and all the other values which is nice because i can log historic cel performance in grafana and see if a cell has a longterm issue. Does your process show you the individual cel voltages in VinusOS?

[@lawrencecraig]

This is great video. I have connected my JK BMS to the Raspberry Pi via the light blue RJ485 that you show. I get a yellow flashing on the TX light when active. However the logging on the Pi shows ERROR:SerialBattery:>>> ERROR: No reply - returning on the JK BMS. Is there any further configuration I have to do? Do I have to specify the USB port? Thanks

[@kevloos86]

Overkill bms sells the adapter on their website for their devices if anyone is looking in that department.

[@SVImpavidus]

Always good stuff! How about an update for beginners on the updated software for the Raspberry pie/ seven inch touch screen? Mine is all fitted and running but I cant seam to get the monitor to sleep or dim and no one is giving an answer that does not involve being a computer geek or learning to write code! Ant.

[@nicolaskahn3996]

Thank you it works well with jk bms and rasberry pi3 but is it possible to install it in a motorhome without wifi? in local bluetooth mode ?

[@philipardvall1968]

Did exactly as you and no errors when installing it but when I plug it in nothing appears and after some troubleshooting it can’t recognise my Daly BMS and when I connect MPPT it’s saying Not Connected but without Daly usb connected everything around Victron worked just fine

[@Darkbluesstar]

I don't know if you are using a Cerbo or Raspi, but you have to connect all when you install all. After that, you need to do a reboot (login by ssh and "shutdown -r 0")! I don't use self-made cables or any adapters. I only use original cables from Victron and Daly... works very fine. Don't forget to switch to the "large" version and to apply DCC otherwise you won't see "Daly".

[@philipardvall1968]

@@Darkbluesstar thanks for reply, I use RP 3 and bought the same Daly adapter that Andy linked to. The strange thing is after I’ve installed the plugin and connect Victron again it just say Not Connected but when the Daly adapter isn’t plugged in works perfect

[@eagle5720]

I'm wondering if my Xiaoxiang BMS can communicate with EG4 inverter using the rs485 on the bms but it seems like I have to solder a connector. Anyone know if this will work?

[@a-c-g]

Is the Victron usb to rs485 not suitable for this?

[@OffGridGarageAustralia]

Don't know, I haven't tested this one. It's pricy...

[@gavinnoname1424]

I'm not sure what those JKBMS Adapters are for....I was able to connect my JKBMS without them. Just connect the JKBMS to your TTL Adapter and the SerialBus Driver will pick it up

[@65mindi]

Finally!!! Andy goes smart way! Thanks for video and introduction of BMS guru!

[@tassieflash63]

I'm pretty sure that the JKBMS Adapter is for isolation.

[@gavinnoname1424]

@@tassieflash63 when Andy turned the adapter over I was able to see that it's an RS485 converter. The JKBMS outputs TTL and the adapter rewrites it to RS485 protocol. I think it's simpler to read the TTL directly and cut out the $15 cable.

[@retrozmachine1189]

When it comes to USB serial ports, be aware that the cheapies often do not have unique serial numbers. This isn't an issue if you have just one of them connected to a linux system but it can cause issues if there is more than one. The waveshare ports do have unique serial numbers, and are stable too, ie they don't just randomly stop working requiring a device reset etc.

[@freakazoidz23]

That's maybe the reason why only the expensive one works with my EM24. Cheap RS485 to USB interfaces did not work.

[@retrozmachine1189]

@@freakazoidz23 If you are using linux you can check the serial number easily enough. Execute lsusb (usually present), note the device ID then lsusb -vd followed by the device ID

[@ShaneS071]

have you tried connecting a Victron Energy Smart Battery Sense to the Raspberry pi Venus OS setup