The new JK Inverter-BMS: all settings, features and functions explained, everything you need to know
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- Опубліковано 28 вер 2024
- The new JK Inverter-BMS is now on the market for a few months and gets constantly updated with new Firmware updates. It is time to make a video and explain all the setting, features and function of this great BMS. As this BMS has now a full charge algorithm and a lot more settings than the previous versions, it can be quite confusing and difficult to get started.
In this Video, I show how I would setup the BMS in a production environment and how to set important features like absorption and float voltage and the respective timers.
I also explain how the buzzer and both relays can be programmed. These are fantastic features which came with one of the last updates.
This video was made with firmware v14.20.
The new JK Inverter-BMS with all features, functions and prices. 16s 100A, 150A or 200A all with active balancer and all features as shown in the video:
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My settings with screenshots:
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BMS Active Current Limiter - Safety Feature or Gimmick?
• BMS Active Current Lim...
Current Limiter Test Seplos BMS 10C, 10E and QSO Tiangbangda BMS
• Current Limiter Test S...
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I bought you 3 cold beers sir! If they aren't cold its probably your bms failed and let your batteries go low! The best videos on youtube. Thanks
Andy, about your question for the use of sense wire resistance : there is a current flowing during balancing, thus also a small voltage drop. If you enter the wire resistance, the BMS can compensate for the voltage drop and make balancing more precise. Otherwise the voltage will slightly drop with the balancer off, causing the balance to stop just a bit to early. But the voltage drop with the standard cables at 1A won't be much.
But with longer wires it might be needed.
Would be about 100mV drop with an amp in 6' of 22awg? I'm guessing it's already compensated, with the adjustment for calibrating for cut or extended leads.
Thank you. As I said, the BMS is 'clever' enough not to balance and measure at the same time, so resistance should not matter.
Great job Andy really helped me install the first 2 in some telecoms batteries which had blocked original BMS both with 15 cells 100ah now running on my 100% Off Grid home ( a little cabin in the desert of Chile)regards
Great! Thanks a lot for the feedback
Danke andy wieder super erklärt und ich mag dein englisch, das ist so verständlich🎉👍🏼👍🏼 schöne Grüsse aus 🇦🇹
Thank you for your feedback!
Excellent bro. I've just gotten three of these things and a big stack of EVE cells on the way. Be at least a month before the cells arrive and I'm able to get to them. Playing carpenter for for the next month building a bug / solar shed. Winter coming full blast next week they claim and my bones move slow in the cold. Delays delays delays..... hahaha
Cheers!
Nice, you will be very busy soon with all this equipment!
Born from the need to grow maggots year round for some chickens. Turned into quite a little project.
Idle hands are the work of the devil they claim. :)
You had mentioned the pre discharge feature and weren't sure of the function. This feature uses a timed cycle prior to the mosfets or contactor engagement to charge the capacitors through a resistor to reduce the huge spike of inrush current and prevent damage to the pass device ( such as welded contacts or putting on contactors or literally blasting mosfets off the PCB substrate/
The BMS cannot really distinguish about a pre-charge or a short. With a capacitor connected, voltage will raise slowly, with a short, it will not. JK told me this function is not working 100% accurately as it needs to make a decision in a few microseconds if it is either or.
@@OffGridGarageAustralia I build EVs for special purpose use as well as portable battery power systems. I understand what you are saying regarding the pre- charge because I've been dealing with large capacitor inrush in motor controllers at much higher voltages. There are BMS examples using three contactors to tackle the problem, with one for charge, one for discharge, and the third with a series resistor that limits the current upon initial closure of the contacts. The rise of the voltage at the capacitors is measured and when a pre determined voltage is reached the discharge contactor is closed safely. Another method would be to allow a fixed time after pre charge is closed to allow the rise.
Sensing the difference between a short and caps charging would involve precise measurement of the leading spike of the current waveform as compared to the capacitor charging spike which would typically flatten more quickly. Problem there is that shorts can be in full contact or partial contact. That is why proper fusing is vital.
Love your channel by the way. I have tested 50+ BMS units. Ten years ago I was designing and building them myself. Twenty years ago I was making them using no microprocessors. All analog. At times I think those were better.😁
@@robertandersonEVs Thanks for sharing, very interesting.
I like your videos Andy, thanks for that you helping me to setup my JK to work corectly with my 3ph Deye invertor. And greetings from sunny Bulgaria ! :)
Great video Andy. I always enjoy your BMS videos.
Thanks for the feedback!
Hi Andy, you wondered why the disable temp sensors is there. Well, on one of my BMS the temperatures are all returning around -40ºC. So I've had to disable them. Thanks for the great work. Andy
Thanks for the rundown of settings Andy. Unless I'm mistaken, I think you missed the "Vol. Smart Sleep" and "Time Smart Sleep" settings - what are they for?
Heya, thanks for all the vlog about bms's batteries ect ect. now you earned a nice cold bier
Thanks a lot for that, my friend. I appreciate it 🙏
Hi Andy, a very big thank you for all of the work (and humour 😁) that you put into your videos. I have learnt so much from you. You have given me the confidence to build by own system and my new JK Inverter BMS has just arrived, so a perfectly timed video 👍 My system also has 16 280Ah cells and a Victron Multiplus 2 5Kva. I am starting by just buying cheap night electricity and will then be adding solar. I have just bought you a beer 🍺 as a token of my appreciation. Best wishes from the UK 🇬🇧
Thanks for the feedback and 🍺. I appreciate both!
Yes, you can do that as well and sell the power back to the grid at peak times. VPP are the future and very popular here in AU.
So informative!
Thanks a lot Andy!
Thank you
Like# 102 - sneaky and no notification...
Another great video to remind me that I'm so thankful I don't have to do any of this with my batteries... but if I did, I'd have a great resource!
I'll try my best to sneak these videos in as quiet as possible... 😉
hey Andy! nice videos, I always enjoy. I recently setup a victron system with a DIY battery and new JK inverter 200A BMS (no smartshunt, JK calling the shots... risky ? haha). Anyway, its all working pretty well aside from a few niggles... (the JK is running the latest firmware as of a month ago or so, 15.something I think)
1) the battery capacity / consumed / remaining AH doesn't seem to be sent to the cerbo by the JK, is this normal or something is up with my system? do you think JK will fix it?
2) my RCV is 3.45V, 100% soc 3.449 iirc, but sometimes if the soc is >85% or so and a big charge comes in (4+kw) from a brief burst of sun some cells momentarily jump up to 3.45V, the SOC jumps from 85% eg. straight to 100%. Bit of an issue with their algorithm, I wonder if they would add a timer or something in future or a tail current before SOC reset, maybe you could mention it to them?
cheers :)
Great video Andy, thank you so much! 🤘🍻
Thank you.
Please help us understand if coulometer works in the new JK Inverter BMS. How to set it? Does it provide reliable capacity info for JK screens? Thanks for all the work you do and all info you provide
Danke, hat sich schon aufgeklärt
I hope it's better than Muller Energy BMS. Muller sends out defective used items. I really thought they were going to stand before time. I now have to switch out all 18 BMS units
Hey Andi. Nice Video. I am using the Old JKBMS because you has shown it here. But the Inverter BMS looks interesting.
One option I would like to have. Is that the timer for the Float Mode is not Hard Konfigured. I would like that when 55.2V is reached an the Balancer is active it keeps staing on 55.2. When then the Balancer tourns off, because the cells are now equal with there Voltage. Now the Float Mode is Communicated to the Cerbo.
Yes, that is another way of doing it. However, the Victron MPPTs and chargers are all having fixed timer settings for this feature as well.
The cell deviation does not mean the cells are all absorbed. So, we would need a tail current here as well: charge to 55.2V and only go to float if balancer is off and current is below a certain threshold. But here again a pitfall: if you have clouds, the current may be very low and the BMS 'thinks' the battery is absorbed and switches to float mode prematurely.
Hence a timer is the most consistent method for charging.
There is no harm of keeping the cells on 55.2V for 1h before going to float.
Good morning Andy,
Unfortunately I have to write to you again, my BMS doesn't allow some settings, here are two examples: Vo. Cell RCV (V). Cannot be set below 3.551 volts. But in the off-grid garage I see a value of 3.45, and values below 3.551 always result in the message Sending failure.
The same with the SOS 100% settings, the app doesn't accept a lower value than 3.541 volts.
Is there something like the expert mode in Victron, or is that down to the version?
HI, I find this whole subject very interesting and enjoy your insight. My problem and possible solutions - I have 4 batteries, all different makes, if I chain them together using the RS485 interfaces the BMS's do not communicate well and I get all sorts of wrong data reported to the Multiplus-II via the CAN interface. So, I am planning on replacing the BMS with JK BMS in all 4 batteries to get them compatible. The question is what JK BMS boards do I use ! Option 1 - replace all 4 with the JK BMS Inverter boards, most expensive option. Option 2 - Replace the battery BMS I will use for the CAN connection with the JK BMS Inverter board and replace the other 3 with the JK BMS (non Inverter boards), will they all talk to each other OK via the RS 485 ? Would the Peter interface boards help here ? Option 3 - replace all 4 with the JK BMS (non inverter boards) . Option 4 - replace all 4 with the JK BMS (non inverter boards) and connect together with the Peter interface boards ?
Hello, thanks for your question(s).
Option1 seems to be the cleanest and cheapest option (see below)
Option2 will not work. the inverter BMS will not communicate with the older BD series of BMS. The Peter board solution will not (yet) connect old an new JK together. A solution will be provided in the future though.
Option3: there will be no coms between the BD BMS unless you use something like the Peter boards for all of them (more expensive than Option1
Great stuff, thanks for your help, Andy. I use a few of them, simply because my car taught me the huge advantage of user firmware update. Do you know, if they will include Epever MPPT controllers in their communications menue? Also: If one cell goes overvoltage the bms would command the charge controllers to stop changing??
The BMS will not talk to MPPT chargers directly. Only to an inverter-charger (hybrid inverter) or the Victron Venus OS (which then controls the MPPTs).
Yes, any OV, OT or OC will stop the charging process of the inverter. Same as UV will stop discharging
Hello @OffGridGarageAustralia , how does the charging logic work? I've already done a few tests and can't figure it out, RCV and RFV and the time dependency. Sometimes the JKBMS regulates the inverter correctly, sometimes not. I just can't figure it out.
Thanks for Informations
And greetings from Germany
Has JK released any firmware updates beyond 15.17? Looking forward to them adding native support for additional inverters like they advertised when this model BMS was first released.
I just built a 48v battery using this bms but it is outputting 36v at the terminals. It is 16s and the cells are fully charged and there are no faults. What is going on??
Hello Andy! Can you confirm?
JK_PB2A16S20P HW 14.XA SW 14.20 + APP V4.16.2 + PC-SW Ver2.7.0.22.
In the APP are missing: "Vol. Cell RCV", "RCV Time", "RFV Time", "Vol. Cell RFV", "Float Mode" Switch.
In the PC software I can see and set "Vol. Cell RCV", "Vol. Cell RFV", "Float Mode Switch" , but "RCV Time", "RFV Time" I can just see but not set.
What am I doing wrong?
Thank you for all Informations!
I have a Problem with my Inverter-BMS. I think the Balancer does not work correctly... I have Delta Cell 0,3V since i have this BMS.
My old JK-BMS with HELTEC-Balancer have Delta Cell ~0.02V.
I hope my connections are right. The App shows correct Voltage... Did you have a Wiring-Plan for JK-Inverter-BMS JK-PB2A16S15P ?
Oh... I have found my Problem. Batterie are 100% and my EPEver has loaded over 56V. It was to much and my voltage going crazy.
Hi Andy , I have just fitted a JK BMS to replace a PACE. . The battery is not connected to the inverter. My battery is 48v Lithium Iron Phosphate , 15 cell , 150Ah. When I open the app it shows 0.0w next to Battery Power why is that? I have set Cell OVP at 3.65 v , but if I then set Cell RCV at 3.45v it says sending failure? Having filled everything in and gone and pressed ok next to each setting I now only have one with the sending failure message, that is UTP at 5 degrees ? I would appreciate any comments on this .Thank you kindly
Hi! When you set your RCV time to 1h and RFV time to 6h. This will charge the battery twice a day. Once in the morning and once in the afternoon. Or am I missing something?? Thanks!
Thanks Andy, as always 👍
Thanks Dave!
Hi Andy, I have a question regarding integration into a Victron Cerbo GX. With the new JK-BMS, do you have to install a script from GitHub (serialbattery or similar) or does it work without? Is there a special setting for this?
I'm asking because I want to build 2 modules now and have therefore ordered the JK-PB2A16S20P, which will hopefully be delivered soon. However, I still have to get the cells.
I wanted to install the basic system so that I don't have to play around later.
Thank you and best regards from Germany
Nobody is stupid, we are all learning...
With the new JK Inverter BMS, this can be directly connected to the Victron Cerbox GX using the Victron CAN Type A cable.
I've made a few videos showing that.
So if i start from the scratch ... Do i go for seplos v3 and 4a neeey? Or would you recomend jk with active 2a balancer?
The are mounted in amys boxes with 280a eve grade b
Hello Andy. Yesterday I connected my Solis RAI-3K-48ES-5G to my battery with the JK-PB1A16S15P. The configuration is like this:
Solis = PYLON battery selected.
JKBMS = CAN protocol (2) Pylontech.
Unfortunately, an alarm comes straight away and says:
BatName Fail ALERT
So, JKBMS doesn't send a name.
I've now looked and found out that the manufacturing name must be in the protocol under the address (CAN ID: 0x35E).
Can you tell the JK people???
Thanks Andy . Gruß aus Deutschland.
Hi Andy, greetings from Andi. Awesome vids. I am strugging to get "consumed amphours" to work in my VRM - shows only zero. Do you or someone else know the solution/answer?
Does anybody know about the pcl module and the dry arm intermittent setting? These didn't get addressed in this video.
Andy, thanks for another great video. Could it be that Cell OVPR(V) means that the system will not allow more current to flow into the battery, but that it will allow a discharging current? You would get safer voltages much earlier than with a full disconnect. Or would that only work this way k with systems with a different Charge and Discharge port? It would be relatively easy to use the MosFets as diodes, allowing current out, but not current in when voltage is above OVP
Yes, of course, an OVP will only disallow charging but discharging is still active.
Hi Andy,
I've been following you for some time and I'm building my own DIY photovoltaic system. I have almost everything and the only thing missing is the batteries and until a while ago I was very skeptical about lifepo4 and I was leaning towards gel agm, considering them less dangerous. and being in possession of a !mpp solar pip 4860 LC" inverter which is a little old but in real mule without a lot of "electronics" so it cannot be connected to my Tracer 10420AN regulator nor to the BMS.
do you think that you can only manage the batteries and any protections on the regulator or is something simpler better, I like this BMS that you have illustrated very well and I am tempted to buy it, but I wouldn't want to make an oversized expense since it doesn't communicate with my inverter.
Thank you for the valuable information you teach us,
Greetings from Italy Stefano
Und noch einmal in Deutsch, vielleicht ließt du es ja ab und zu gerne Guten Morgen Ronny,
mein BMS lässt einige Einstellungen nicht zu, hier zwei Beispiele : Vo. Cell RCV (V). Lässt sich nicht unter 3.551 Volt einstellen. Bei der Offgrid Garage sehe ich aber einen Wert von 3.45, es kommt bei Werten unter 3.551 immer zu der Meldung Sending failure.
Das gleiche bei der SOS 100% Einstellungen dort akzeptiert die App 3,541 Volt keinen tieferen Wert.
Gibt sowas wie bei Victron den Expertenmodus, oder liegt das an der Version ?
Hi andy, Would you be able to explain the state of health parameter which you can see from jkbms in venus os? It sometimes drops. I have to change ah in the setting and it goes back to 100% not sure if it has any real function?
Any BMS calculates the SOH as per some algorithm. We don't know how and what the calculation but I'm sure, every manufacturer uses their own calculation. So, personally, I would not care too much about it. We don't know for sure what the real SOH is unless we do a full capacity test again as we did at the beginning for this particular cell. So take this with a good with a good pint of salt and use it as a rough guide only.
Hi Andy, You indicate that your Start Balance Volt is set to 3.45V. And your Vol. Cell RVC at 3.45V And your Soc. 100% Volt at 3.449V. If you haven't fully charged your batteries for a long time. (in my case because I use ESS and the batteries charge and discharge continuously) Is it right that the batteries are not balanced? And what value could this be set to in order to be able to balance? I also use the JK-PB1A16S10P with Firmware V15.11
Question.
I have an Epever Tracer 8420AN and have just ordered 16 cells EVE MB30 with the JK RESS PB2A16S20P.
Is it possible to have the bms talk to the epever charge controller?
Are there other way to make the communicate? Home assistant? Solar assistant?
Help is appreciated!
Greetings from Sweden!
Any idea why the "Vol Cell RCV", "Vol Cell RFV" are not listed in the mobile Android app (last version) but are listed in de Windows app??
BMS just updated to v15.17 firmware, still those values are only in windows app.
What mobile app version have you got?
@@OffGridGarageAustralia 4.20.0.
Google PlayStore says that its the most recent one. 🫣
@@OffGridGarageAustralia the version from your dropbox account. Where the playstore indicates its 4.20.0.
6:14 If 3.650V is the value of this setting, then, what if the JK voltage calibration is no so good (about 10 or 20mV of error, for example) and/or the voltage of one cell is bigger than 3.650V before is detected by BMS? Could it damage that cell?
The voltage calibration of the JK is on battery level. So if the overall battery voltage is off by 0.2V and we have a 16s battery, accuracy for the cell voltage could be impacted by 12mV. I wouldn't be too concerned about 10 or 20mV.
@@OffGridGarageAustralia Sorry... I meant 10-20mV per cell calibration error. So... 0.160-0.320V for the whole battery. If you reach 3.66 or 3.67 for a cell, could it be damaged? how much time can be at those voltages before damaging them?
hi great videos, is these the bms Top 1 ? wires look thin for 2a
Hi Andy, an you tell me what is the smallest current which can be measured? You know about the problems with seplos bms :)
Is it so hard for JK to include an instruction manual with each device so we don't have to guess what each parameter is for?
yes.
They are not great with documentation.
Colles Video :-) Vielen lieben Dank
Eine gute Frage, was ist besser?
Das neue JK-BMS oder das alte JK-BMS mit dem Peter board?
Bei mir aktuell sind die alten JK-BMS verbaut
Schöne Grüsse aus Österreich vom Bodensee
Leave the old JKs ins place if everything works. There is no need to upgrade. The Peter boards are quite expensive too and only if you really need the communication or want full Home Assistant integration, they make kind of sense...
Ironically I'm just looking at my JK BMS settings as this video has come to light......
Tried to program the mppt charge controller and it's managed to crash and go into a child's fit and it will not let me re-adjust the settings....
it has now been returned to the seller....
And a victron ordered in place of it
At least the JK BMS is easy to install and and set up with its user friendliness
Yes, the JK is relatively easy to setup.
Die Sofware Version ist V15.12 Hardware V15 XA
Andy, Your channel has been great. I have learned so much about LiFePO4 from you. However, I find myself NOT watching the newer videos. It seems like this is turning into "Andy's JK BMS Test Lab" channel. I am not interested in JK.
Thanks for the feedback. Just skip these videos for now. They are very important for the community as this is THE BMS we have all waited for.
We will do some battery testing soon again. See you then...
Nice pre-charge limiter! What's the maximum duration?
It uses PWM for the current limiter, so can run forever. It will check every minute if the current is still over OCP.
@@OffGridGarageAustralia Sorry, I meant pre-charging the inverters' capacitors on startup. The default seems to be 5 seconds, but with my two Sunny Islands and their massive capacitors I'd need maybe 20 seconds.
Kiitos!
Thanks a lot, my friend. Love your support 💕
Hi Andy can you do a new video of how to install CANBUS bcz once setup helper is installed it has changed. I can't figure it out. Sorry.
Not sure what you exactly mean...
@@OffGridGarageAustralia installing canbus to raspberry pi has changed. Also if can bus is installed on the raspberry pi can the mulitplus-ii be installed to it or does it always need a mk3 cable
@@pulith5220 I have multiple videos on my channel showing how to install a CAN hat on a Raspberry Pi. Do they not work for you?
The Multiplus II does not use CAN as such but Ve.Bus. You always need a MK3 to connect to it if you don't use a Cerbo GX instead of the Pi. The Cerbo has a Ve.Bus port for that purpose.
@@OffGridGarageAustralia thanks.
Thanks!
Thank you very much!
I'm getting BMS overload.
congratulations 👏 My Settings
VeConfigure parameters and cerbo GX?
Yeah, OK, very specific and only Victron related...
Explaining all settings in the Cerbo won't happen though. That is like explaining Windows...😄
@@OffGridGarageAustralia Windows 🤣
Okey I received One ☝️ ❤
Andy I want to buy a Thanks$ but it asks for credit card details - sorry not acceptable - but I would use Paypal, much better security control
💥BUG: 😳 I have 2 new JK BMSs. If the 2 BMS are ON in "dicharge", it is impossible to switch the 2 "load" OFF. The other automatically switches ON. Does this happen to you? 🤔🙂
I don't quite understand what you mean...
@@OffGridGarageAustralia I'll send a video if it happens again. This morning everything is working fine. 😊Thank you.
❤
Love you too, bro!
💙👊😎
Hello!
I don't know you will answer a question or not.
attention Andy on the jkbms software the RVF MODIFIES THE CVL ON VICTRON THERE ARE ERRORS ATTENTION!!!!!
RVF=CVL VICTRON
Not, for me, no... what do you mean by that? Of course, RVF is the CVL at some stage. That is intentional!
andy in the video I don't understand you are saying that the RCV and the absorption value which and in victron CVL while the software modifies the CVL in victron by modifying the RVF then who is right?@@OffGridGarageAustralia
the engineers have not responded for 15 days, even the seller no response!
@@patrickruiz6764 First RCV is our CVL and the BMS requests the chargers to charge to this voltage. Once this is reached, the RCV timer runs. After the timer runs out, RFV will be replacing RCV and RFV will be the new CVL. It sets a lower voltage.
@@patrickruiz6764Keep emailing them every day and also use WhatsApp to contact them.
I am late as usual.
Me, too
You're both always welcomed.
Tinder thing swipe to the left😂
You know what I'm talking about, ey?!😄
JK are missing out on a huge customer base (and you on a massive load of new viewers!) People in boats and camper vans need a BMS where the relay can be programmed to disconnect on any situation that would cause a charge disconnect so as to save the alternator diodes from going pop when this disconnect happens. The relay would be used to disconnect the alternator field wire in any event that causes a charge disconnect. A delay of a second or so before the actual charge disconnect would be ideal too. If a temperature sensor could also be connected to the alternator frame and be used to reduce charge current at high alternator temperatures then JK would have a BMS that would really appeal to boaters and campervanners. It is a huge market that is now really getting into LifePo4 but at the moment but is having to deal with the alternator diode popping and alternator overheating problem by using either DC-DC (very inefficient) or smart alternator regulators such as the Wakespeed or Mastervolt Alpha Pro III (very efficient and good for alternator temperature control but still no good for charge disconnects) or even worse people are connecting their LifePo4 to a lead acid battery to protect from disconnects and then using a long wire from the alternator as a resistor to limit alternator output to stop their alternator burning up! (yes this really is a popular thing - especially on UK narrowboats and is being heavily promoted by people who don't know what they are talking about on places like FaceBook). Come on Andy get JK to build the ultimate BMS that works for home power situations as well as boats and campervans that need to use a BMS with an alternator.
Good point. I guess most of these applications retain a lead acid starter battery - so connecting the alternator (or alternators) can be wired to the start battery and then the cross charge to the lithium house bank can be done with an intelligent split charge relay. Of course this might still result in an unintended (and avoidable) disconnect of the domestic battery. But if the two dry contact relays can be programmed as Andy says (around 25 mins in) you could set a voltage above charge voltage limit - but before over voltage limit - to control a split charge relay or the field supply to the alternator. I think that would do it.
@@paulholland2380 The manufacturers of the LifePo4 cells state on their data sheet not to connect their cells to batteries of a different type or make so connecting to a lead acid and mixing your chemistries goes against the manufacturers advice.
A battery isolator can be used to make this irrelevant.
No way JK or other BMS manufacturers will want to be responsible for external components. That's a user modification or for some kind of after market adaptor
Anyone have an idea why my BMS is throwing a "Temp Sensor Abnormal"
Spec's
Vendor ID: JK_PB2A16S20P
Hardware Ver: v15.XA
Software Ver: V15.10
Just T1 and T2 are connected: Reporting 21.8 and 22.2C, respectively.
Charge/Discharge OTP are both at 50.0C, Charge UTP is set to 2.0C. Don't see a Discharge UTP?
Only has 10 hours on the clock and I saw it pop up yesterday. Running like a champ, just can't figure out what it's whining about? :)
Figured it out. Didn't have the other 2 battery sense leads connected. It was crazy, first added the 3rd 7-Pin connector from the left (NT3-B12). The app showed Battery Temp 5, change from N/A to 21.2C (interesting), How's about calling it Temp 3, na let's call it 5? Then the finally, 6-Pin sense connection NT4-B16, that activated Battery Temp 4, well got that one right. Alarm cleared. Wow, these guys have some work to do. JK be happy to be a beta tester and please fix the only "Realtime" Major Status, parameter that's still in Chinese. Guess it's the BMS's total run-time? Hard to tell, since I can't read Chinese. One last gripe, why is my Warning list contain an entry of "Battery is Fully Charged", don't think that qualifies as a warning, but who am I to say.
@@TheBelcherMan by the way, Andy has the new fireware for your version 15. It is up to 15.11 now as of March 1st. I have version 15 also and found that it doesn't have the heater description function like Andy has.
My prays has been answered, thanks Andy for reading wishes and also membering us newbies. Priceless.
You are very welcome
Good run through.
On the wire resistance settings, each BMS sense wire is shared between two adjacent cells. There is a resistance in the battery terminal ,about 0.05 milliohm for good terminal connection, and about 0.07 milliohm for nickel-plated copper core bus bar.
When there is moderate inverter/charger current, the terminal and bus bar resistance effects the BMS cell voltage sensing. BMS has control over balancing current but does not have control over random inverter/charger current. BMS does read total battery current so it can calculate and wash out the voltage drop caused by battery terminal connection and bus bar. At 100 amps it can amount to 15 to 30 millivolt drop in cell voltage measurement. Not a lot of voltage but enough to cause balancer to make wrong decision on balancing choice.
Hey Andy, thank you for your explanation regarding absorbtion and float which makes absolutely sense to me. I am using since a week now a Victron ESS with 3 MP2 5000, a Gobel Power GP-SR1-PC200 with a PaceBMS, a Victron SmartShunt and of course a CerboGX. Right now I let the BMS do the job. Means no float mode. How would you do the setup there to have absorbtion and float-mode? DVCC "ON" ControllingBMS "No BMS Control"? System Setup: Battery Monitor "SmartShunt"? Is there anything missing or is there any other alternative setup for it?
Thanks Lukas. The PACE BMS does not have a float mode setting, so the BMS allows to charge to the absorption voltage and stays there until the sun goes down. If you set this voltage conservative, like 55.2V with 14A current, it should be OK.
Definitely let the BMS control the Victron system through the DVCC and also set the BMS as you battery monitor. That is a huge safety feature. You actually don't need the smart shunt any more in this case as the BMS is now your shunt.
For the people living in some cold country there is one feature missing, or incomplete.
The temperature when heat start, that must be higher than the temperature when stop charging. ( custom value will be great)
Or for the relay to start at low temp, and use some wire ( not so elegant)
I use at this time adițional Relay for heating, long way read temp from bms, get in a thermostat in HA, command to a relay inside the battery box
And low-temperature trigger for dry contact... Here at 15.10 firmware still missing...
2 amps is not enoth for heating anyways. Also heating is turned on even if there us no charge current present, so you need to implement your own heating logic anyway
@@RFDarter You're right with the logic, with HA I have more option when to start the heating.
About the 2A it will be enough, my heating curent is 1.8A, is set at 8 degree Celsius, the heat start when sun rise, so it start heating before the panel start getting power
@@gepettoautomobile 2A is enough. You're right. I have about 1.6A with 5 heating pads. But still want to use dry contact to control bigger relay.
@@gepettoautomobile 48V System?
If so then you dont even have 100W of heating power with 1.8A.
With 100W it would take 14min to change your battery temp +1°C.
If your battery cools down to -3°C it would take 1 hour and 40 min to get the batterie to 5°C.
Not considering any losses, so it asumes you battery is perfetly Isolated, so it would take more like 2,5 to 3 hours.
Auch wenns wirtschaftlich keinen Sinn macht, vielleicht sollt ich dir eine Palette Ottakringer Bier um den Globus schicken.
Aber per Schiff ist das Ablaufdatum dann schon überschritten.
Und Luftpost und CO2 Abdruck….
Hast du andere Ideen?
Deiner Familie aus Deutschland mal bei einem Besuch mitgeben?
Gerade gecheckt: Versandkostn €360 🤪
Ablaufdatum ist doch egal. Deswegen ist doch Alkohol drin😉
Im Handgepaeck kann man ein Palette auch nicht mitnehmen. Am einfachsten Spenden und ich kaufs hier unten wenns wieder im Angebot ist!
Trotzdem vielen Dank fuer den Versuch🙋♂️
PCL is parallel current limiter it will work when two bms are communicating in parallel I think jk bms has 10amp as parallel current limiter
@aftabmaqsood thanks for the clarification. Could you please give us a few more details? When does it limit the current? ALWAYS or just at the beginning? Is it for charge or discharge current?
It will limit the current if you hit OCP.
Perfect timing. I really just installed the new bms and started the configuration...
Please continue the lovely videos... they are even funnier to watch as an german native speaker... "Zollstock"
Herzlichen Dank aus der Schweiz
Danke Dir for your feedback😉
Hi Andy. Where can I find a list of inverters that the JK-BMS V15 is able to communicate with? I sent an inquiry to JK but didn't get a reply. I have SolaX SK-SU5000E and SolaX SK-TL5000E/BMU5000. My existing BMS uses LG Chem LV battery communication protocol
Thanks for any help you can provide
Not sure if someone replied. Display temperature sensor being off is useful. In one of my batteries the temp sensor became faulty. It would not charge or discharge the battery. Different bms, and I could do nothing. I had to call the company to change the sensors and everything worked fine afterwards. In my situation like that, when the temperature is relatively well controlled and the sensor goes bad. This is a quick fix.
Ah, OK. That would be some sort of manual overwrite until the new sensors are available. Good example, thanks.
Hi Andy, I want to build a DIY 12V Battery for my RV. So I am searching the perfect BMS and found the JK-BMS. In the Internet I found a 300 Amps version of the JK BMS (B2A8S30P). So the question is; is it a real JK-BMS or is it a fake?
Do you know anything about this type?
Friendly Regards
Werner Huefner
Hello, so i use your setting, but now i cant reach the fully charge voltage that should be 3.450v.
When the battery show 100% the cells have 3,360v And sometime when i get Down to 30% the battery drop to 0% ať night.
Once i reach the 3,450 v but i need to do this, when the battery reach 100% set the capacity From 280 to 290 ah, And then the battery jump to 70% And start charging And after i think 1 Hour it reach 3,450 v And reset to 100%
Thans
I had watched this video before, just because I watch them all 🤭. But now I've got my first JK, I had to watch it again. Thanks Andy!
Thanks a lot for your support. It is much appreciated!
It would not be more useful to show us, or some of us, how to install it?
Hi Andy!
As JK is unable to produce a real manual for the PB-series (for the old standard series they have one) i want to point out about the confusing red LED of the additional board. The red LED stands for the alarm. Confusing is, that it is on immediately when connecting/starting the first time. So when there is a REAL ALARM it will FLASH ....... and you can read the info on the 3rd page of the 4.3"BMS and in the APP/Win monitor.
So JK-PB users should not be shocked because of the red non-flashing ALARM-LED!
Good evening,
Thank you for all the videos and all these explanations.
I have a problem with the JK BMS connected with a Growatt hybrid inverter and a 16S Lifepo4 battery, the SOC drops from 60% or 50% to 1% in less than a minute. The batteries seem correct to me.
How can I solve this problem.
Thank you for your feedback.
Pascal
I know this is a slightly older video, but my JK BMS display is always on irrespective of switch settings (and I have three of them all doing the same).
For AC surplus charging in a grid-tie system, would it be an option to use a "dumb" non-controllable AC-DC converter, then use the BMS's current/power limiting function to regulate so that just the amount of energy lands in the battery that would otherwise be fad back into / lost to the grid? Controllable power supplies (like MeanWell NBP, Huawei R4850G2) can be hard to come by and more expensive, esp. when you have/need the BMS anyway.
Do you know whats the difference between the JK-Inverter-BMS and the JK-BMS? One is cheaper and smaller i saw the rest is not clear to me....
Hi Andy! 'love your work, thanks!
Do you know if there is ANY real manual for the PB2A16S20P / PB series? I mailed to JK but no answer. I tried the web site contact formular but this does not work with none of my browsers (I think it does not work at all).
I'm interested in serial communication protocol, parameters list, connectors and pin descriptions, but no chance.
Perhaps you cold make use of your good relation to JK and push them to create(?) an manual and put it up for download?
thanks & greetings!
Phil
Hi Andy! Great job as usual.
Would be VERY cool to have charge current limitations based on SOC and temperature settings kind of like what Louis' driver does. Please make mention of this to JK for us :)
Thank you for the feedback.
Why should we limit the current based on SOC or temperature?
@@OffGridGarageAustralia It's stressful to (dis) charge at high C-Rates when cell temps are too high or too low. When the cells are at a high or low SOC it puts even more strain on the cell.
For example, the datasheet sheet for my LF280's says at 10°C and 90% SOC to only charge at 28 amps.
Thanks for taking the time to go through all of these settings with us. Great content as always! Looking forward to watching you get your "hands dirty" on the next one. Take care.
Thanks for your feedback....
I bought a JK-B2A24S15P JK BMS and the settings menu has changed from the ones I bought 2 years ago.
I have
Recognize Cell Vol. (V) : 2.000
Impossible to change this parameter
Battery OVP(V) : 3.00
Impossible to change this parameter (I tried 3.65x16, not accepted)
Battery OVPR(V) : 2.6
Impossible to change this parameter (I tried 2.9x16, not accepted)
Chinese products are SO BAD when it concerns manuals.
Anybody has some ideas about tese parameters and why they do not work (I tried 2 times lifepo4 default parameters to see if these parameters are still in place so it is not that the problem).
I am building a system for my motorhome , a 1972 GM bus 4108A, I am installing 4-540 watt panels on the roof. all victron equipment. a 3000/24/70 inverter charger. a 250--88 Tr Ve can MPPT, 32 - 3.2 volt cells 304 amps. , victron smart shunt. my question is which JK bus should I run. I would like to configure the batteries into 2 - 18 cells batteries at 24 volts.
I recently installed this bms and a lot of these settings aren't present for me???
I just bought some of these and got latest HW version 15. Looks like some of the connector locations have changes in position slightly on HW rev 15 but hard to be sure with the poor documentation. It looks different comparing HW v14 STEP files.
Can this BMS be used with non-networked chargers and inverters, similar to a standard JK BMS?
I’m thinking of getting one to use by itself until I upgrade my inverter
hello handy today I installed the jkxxxPB 2A150A I turned on inverter and it charged well my 280ah 16s ,up to 54.4v then I discharged some consumption and then I don't understand what happened the charge went OFF as if the bms froze at that cell voltage 3.35 , and there was no way to change the situation, but inverter still charged the battery up to 55.4 but in the display and in the app the voltage that gave me the BMS always that 3.35 even if the battery was at 55.4 I don't know how to get out of it ! If you have mail I would send you the photos of the config of the BMS copied from your grazie ❤❤❤
Did you ever work out how to calculate SCP Delay?
Im have an issue where my 240v fridge thats run off my 2000w pure sign inverter keeps activating my scp warning. I have just fitted a 4s jk bms to my eve 105 in place of my daly bms. This 1500 default setting is the only thing i can contribute to the actavtion of the bms shutdown.
The User Data 2 field in the settings, can hold a user defined name of the battery box. It will appear in some parameters of the Cerbo ...
I dont have a Battery Tester to know the AH capacity of my cells.
Can this new JK BMS automatically measure the total AH of the cells?
does floating charge mode function even when communicating with the inverter through can or rs... or just when not using communication cable?
PCL correspond to Parallel battery setup, presumably Parallel Control Logic. I remember when I started using this (only one unit btw) I had a error ( PL Module Abnormal) and I was suggested to turn off the PCL mode to resolve it.
If you don't have Parallel setup, you can disable it.
I wonder if you could use this BMS to run in parallel with an LG, cam battery and a sung inverter?
PCL = Parallel Current Limiter?
@@OffGridGarageAustralianah, my guess is better😂?
The combined current at inverter is sum of individual current limit set at each BMS.
So, confirmed: PCL stands for Parallel Charge Limiter and the dashboard will show if the BMS runs in this mode or not... Will be in one of the next videos 😄
@@OffGridGarageAustralia Looking forward to a clear understanding when and why to use this function and in more detail.