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.
@@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)
My post has been removed ( BY my self ) regarding JDB -AP215001 BMS UART remote comm 3 day in it started to sending alarms low temp- over charge current and so on that not show with blue tooth and app so and it is ************ to stop it and also to remove BMS comm loss 67 alarm you have to reset solar controller back to default and then reconfigure the setting this a problem with my BMS not with the scraped
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!
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!
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.
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
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".
@@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
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
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 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!
@@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.
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.
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?
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. :)
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?
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.
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
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?
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.
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?
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
@@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.
I would like to see a similar driver from Louis VDW that can be tailored to communicate with a 3rd party INVERTER using TTL. I sent $50 to Louis with a request/query.
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😎
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).
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.
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
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!
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
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.
+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.
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.
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.
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 .
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.
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.
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?
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...
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?
I'll talk about this in the next video. I have it installed on the Raspi but it does not show any data from the Seplos nor does it show up in Victron as a Battery Monitor as the RS485 adapters. I'm lost with this solution
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
hey , great show ,,, how about you check out the 12V 100Ah Lithium Iron LiFePO4 Battery 50A BMS Solar Charger DEEP CYCLE Power , with coupon only $270 , super cheap . must be worth a look .
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.
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
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
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.
I have connected my JK BMS to my cerbo ok. I enabled DVCC and my Smartsolar controller went into a remote control which was expected. The issue I had was the pack would never charge above 53v. I assume this is coming from the JK but couldn't see where or how this was configured. How are the charge settings defined with DVCC and the JK or am I better just with JK data which is nice and a custom Victron charge profile?
For what to use 🤔 i don’t know, but could you say load my car today, but tomorrow my seplos and not the car ! Or just to 10 % and 20 % for battery 1.0 and the rest of the day only 3.3V for the cracked single cell 😂 which has then 280 Ah for an Esp32 😂
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.
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)
Hi, I would like to ask if anyone might know how to connect and display data from another DC-AC 230V 48v 5kW inverter to the Victron Venus OS system. As well as how to connect a BMS not from Victron. I'm a big fan of Victron components, but unfortunately I don't have enough money to buy the Multiplus II 48v 5kW that I would need. Otherwise I'll have to go for some All-in-one inverter 48v 5kW for 1/3 the price as all the necessary Victron components. Thank you, best regards Tibor (Czech Republic)
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 😊
Other than it's nice to view remotely, I don't see the benefit. It adds complexity and we have enough of that as it is. Now, if there is an actual benefit, then I'm in. I have 4x 11kw batteries with JK BMS's with the full suite of Victron Blue gear...
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 🙂
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.
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.
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
I connected one of my batteries to venus on an rasbpi. Now i have three 24V/304Ah Banks in parallel connected to a Smartshunt. So I can see the total current af them. There is a voltage drop from the connection cables and fuses of each bank. therefore is the dedected Voltage of the shunt not exactly the battery voltage. It would be better when the Voltage would used from the BMS. Is that possible?
Be careful with these adaptors. I had a faulty one, and it crashed the interface on my JKBMS and also on my MPPT tracker. (Adaptor got very hot - I noticed that too late).
@@OffGridGarageAustralia - only the interface is dead. Besides the interface, JK is still working. MPPT has been repaired by Victron support. JK is still running (without using the interface) + I have added a victron smart shunt for communication. Worst thing is, that it cost me about 2 weeks to find the reason (thought first that I have made some mistakes when setting up serial battery driver).
This hole problem may have been diy usb to rs232 leads from amazon in test now with one Victron lead usb to 100/30 solar controller and Bms plug in and reading information with no alarms will be on test for this week and we will see ---diy usb to rs232 leads ( 0 ) ---- Victron ve usb ( 1 ) has not faltered in 24 hr now so isolated usb to uart 4 way and leads but still on back order as from 13 November order completed and ship from today now its up to postal gods estimated ETA 9 December 2022
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!
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.
@@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
@@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).
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.
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?
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.
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 ;-)
Hi Andy, good video thank you. Shit!! I have just noticed that the serial driver has hard limits encoded, this is no use to me as it limits the charge to 50 Amps, my limit is 150 amps 😮💨😮💨
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.
Andy is there a method for balancing these sealed, no bluetooth, Budget Chinese batteries. Which I'm Almost sure, probably contain passive Balancing BMS.
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.
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.
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 😂
@@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.
@@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.
@@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.
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.
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.
Is there an update to this,? I clicked the links you have and i am sure its somewhere in the link but it does not appear to be the same as what you have, i cant find just one like to copy and paste into the Raspberry Pi, thank you for the help
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!
adding to post below abort 20min ago all sorts alarm from the BMS But how as it not plug in to raspberry pi ? bug in system ! low call voltage - high change current
![CAMPปลิ้น | EP.82[1/2] แก๊ง 3 สาวเพื่อนซี้บุก CAMPปลิ้นครั้งนี้ห้ามเสียอาการ](http://i.ytimg.com/vi/_6WUjXHe1TM/mqdefault.jpg)
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.
That was my approach to.
Purchased a connector for the JKBMS port and connected the three wires to a USB TTL adapter.
Do you have links to the plugs and converter?
@@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)
Yes, I only use a simple TTL adapter that is connected directly to the BMS. since the rs485 adapters n did not work.
@@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.
My post has been removed ( BY my self ) regarding JDB -AP215001 BMS UART remote comm 3 day in it started to sending alarms low temp- over charge current and so on that not show with blue tooth and app so and it is ************ to stop it and also to remove BMS comm loss 67 alarm you have to reset solar controller back to default and then reconfigure the setting this a problem with my BMS not with the scraped
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!
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?
do you have the answer to your question? thanks
@@christophe3195 Sort of but not really ;-) still curious though.
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!
@Andy please try this suggestion. If you succeed, it will be a game changer
Right. I just only cut the cable and connected it directly to a TTL to USB and everything is working fine
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.
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
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".
@@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
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
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.
Is it not possible to connect more then one JKBMS at the time?
@@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!
@@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.
Does it aggregate the totals for showing a combined SOC in VRM?
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.
You know, I thought it was overpriced until you mentioned that it came with the screwdriver, now I must say it’s an absolute bargain
Extremely helpful, thanks for sharing and the work involved!
Hallo Andy.
Vielen Dank für deine genial gut erklärenden Videos.
Lass dir dein Bier schmecken.
Gruß von Frank aus Hamburg
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?
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. :)
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.
Thanks, same here, haven't done any Node Red programming yet. Not sure if it is necessary or beneficial...
no SEPLOS at all or just post poned for the future ?
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?
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.
Is the Victron usb to rs485 not suitable for this?
Don't know, I haven't tested this one. It's pricy...
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
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?
@@melvindevries_nl with Louis his script you can connect you're bms to VenusOS if you can't with CAN
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!
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.
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?
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
Finally!!! Andy goes smart way! Thanks for video and introduction of BMS guru!
I'm pretty sure that the JKBMS Adapter is for isolation.
@@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.
I would like to see a similar driver from Louis VDW that can be tailored to communicate with a 3rd party INVERTER using TTL. I sent $50 to Louis with a request/query.
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😎
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).
lekker man
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.
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.
Thank you Andy for all your work on this a very important job..well done!
Many thanks!
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
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!
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
Would love to see CAN Bus working if you get a chance to make a video covering that. Very helpful though, thanks
Just as an aside, you don't need Putty on Windows any more, SSH has been installed natively.
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?
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.
+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.
Hi, how do you do this with a cerboGX instead of a raspi? Just plug in the rs485 to usb adapter? Thanks!
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.
Does anyone know if this solves the SOC issue with JK BMS? Or will it still show the wrong SOC data in the Venos OS?
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.
Fantastic info. Thanks a lot for sharing this here, much appreciated.
Ok, now you have a BMS connected to the Victron.... not complex, but what are the "many" benefits?
Yep, that was my question as well. Some want just this for monitoring purposes.
Battery is ok
Charging also ok
But out put vol while coming through bms is low
What is your doubt
😀
🤣🤣🤣🤣
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 .
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.
How you can have 12V and 48V Mixed in one System?
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.
Thanks a lot for letting us know. I'll definitely have a look. Sounds interesting.
Edit: Does not seem they support Victron...
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.
@@dabbsy81 absolutely, it’s an excellent system.
Do you still need raspberry pi and all those connectors? Or has it been simplified?
oh dear......clear as mud....grrrrr....can you make this more simple?
please also check good quality ANT bms
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?
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...
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?
Hi Andy I also cant get the waveshare canbus to work ?? :(
I'll talk about this in the next video. I have it installed on the Raspi but it does not show any data from the Seplos nor does it show up in Victron as a Battery Monitor as the RS485 adapters. I'm lost with this solution
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
hey , great show ,,, how about you check out the 12V 100Ah Lithium Iron LiFePO4 Battery 50A BMS Solar Charger DEEP CYCLE Power , with coupon only $270 , super cheap . must be worth a look .
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.
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
This Action is in The Package Manager Now To Install
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
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.
I have connected my JK BMS to my cerbo ok. I enabled DVCC and my Smartsolar controller went into a remote control which was expected. The issue I had was the pack would never charge above 53v. I assume this is coming from the JK but couldn't see where or how this was configured. How are the charge settings defined with DVCC and the JK or am I better just with JK data which is nice and a custom Victron charge profile?
Okay… Daly BMS plays havoc with Venus (loads of alarms even when disconnected) anyone know how to remove the plugin from the GX?
For what to use 🤔 i don’t know, but could you say load my car today, but tomorrow my seplos and not the car ! Or just to 10 % and 20 % for battery 1.0 and the rest of the day only 3.3V for the cracked single cell 😂 which has then 280 Ah for an Esp32 😂
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.
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)
Hi, I would like to ask if anyone might know how to connect and display data from another DC-AC 230V 48v 5kW inverter to the Victron Venus OS system. As well as how to connect a BMS not from Victron.
I'm a big fan of Victron components, but unfortunately I don't have enough money to buy the Multiplus II 48v 5kW that I would need. Otherwise I'll have to go for some All-in-one inverter 48v 5kW for 1/3 the price as all the necessary Victron components.
Thank you, best regards
Tibor (Czech Republic)
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 😊
great bit of information, thank you very much! I will investigate this aswell as soon as my JK B2A24S20P arrives.
Which ttl convertor?
Other than it's nice to view remotely, I don't see the benefit. It adds complexity and we have enough of that as it is. Now, if there is an actual benefit, then I'm in. I have 4x 11kw batteries with JK BMS's with the full suite of Victron Blue gear...
Found the video again, must have blocked it out...
Ah, great. That's probably all you need for a single battery.
Thanks for reviewing Louis' driver. Look forward to the CAN bus Seplos equivalent. BTW SA was settled by the Dutch.
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 🙂
@@izakburger1580 ag nee man - its all lekker bru
I installed my smartshunt last week... 😄
Danke for another interesting video as always!
You're welcome, Martin.
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.
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.
Yes Andy
Invite me as a VRM user please.
I do not need to be granted full access though 😂
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
I connected one of my batteries to venus on an rasbpi. Now i have three 24V/304Ah Banks in parallel connected to a Smartshunt. So I can see the total current af them. There is a voltage drop from the connection cables and fuses of each bank. therefore is the dedected Voltage of the shunt not exactly the battery voltage. It would be better when the Voltage would used from the BMS. Is that possible?
Be careful with these adaptors. I had a faulty one, and it crashed the interface on my JKBMS and also on my MPPT tracker. (Adaptor got very hot - I noticed that too late).
I will show some isolated adapters here soon.
So JK and MPPT dead?
@@OffGridGarageAustralia - only the interface is dead. Besides the interface, JK is still working. MPPT has been repaired by Victron support. JK is still running (without using the interface) + I have added a victron smart shunt for communication. Worst thing is, that it cost me about 2 weeks to find the reason (thought first that I have made some mistakes when setting up serial battery driver).
This hole problem may have been diy usb to rs232 leads from amazon in test now with one Victron lead usb to 100/30 solar controller and Bms plug in and reading information with no alarms will be on test for this week and we will see ---diy usb to rs232 leads ( 0 ) ---- Victron ve usb ( 1 ) has not faltered in 24 hr now so isolated usb to uart 4 way and leads but still on back order as from 13 November order completed and ship from today now its up to postal gods estimated ETA 9 December 2022
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!
doesn't work
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.
@@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
Yes, except that jkbms rs485 protocol doesn't support address, so you can't target a specific device on the bus
@@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).
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.
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?
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
Waveshare Industrial USB To RS485 Converter with FT232RL Chip works a treat
Again Andy. Hats off for sharing all you learn. Even when you don’t see the need. Super happy to see BMS details remotely.
Thanks for your feedback and support, Matt!
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.
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 ;-)
Learned this the hard way ... have now two USB to RS485 devices broken , hope they are the only thing that got broken ...
Can you please recommend a suitable USB adapter with galvanic isolation?
Hi Andy, good video thank you. Shit!! I have just noticed that the serial driver has hard limits encoded, this is no use to me as it limits the charge to 50 Amps, my limit is 150 amps 😮💨😮💨
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 !
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.
Yes I know about Fronius. It is compatible with Victron. Thanks for your answer 👍🏻
Hi Andy, i´ve made the installation on a Cerbo and it works perfect. Thanks from France
Andy is there a method for balancing these sealed, no bluetooth, Budget Chinese batteries. Which I'm Almost sure, probably contain passive Balancing BMS.
I'm blown away. I didn't know about these configurations. Good job to show details that work and how to troubleshoot.
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.
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.
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 😂
@@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.
@@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.
@@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.
What’s a raspberry pie? Where do I buy this?
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.
have you tried connecting a Victron Energy Smart Battery Sense to the Raspberry pi Venus OS setup
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.
Hi, did it’s possible to connect 2 bms (jk) with a USB hub to a cerbo to use 2 separate batteries?
Is there an update to this,? I clicked the links you have and i am sure its somewhere in the link but it does not appear to be the same as what you have, i cant find just one like to copy and paste into the Raspberry Pi, thank you for the help
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!
adding to post below abort 20min ago all sorts alarm from the BMS But how as it not plug in to raspberry pi ? bug in system ! low call voltage - high change current