New JK-BMS: The Hardware | Part 1

[@OffGridGarageAustralia]

I'm collecting all questions about the new JK-BMS and will do a Q&A video after the test series. So, keep the questions coming, guys!

[@boomermatic6035]

I would be interested in knowing if the BMS needs some type of active cooling at high currents. Welcome to the 3D printing world, I got one for the same reasons you did; hit me up if you need some CAD work done.

[@BadIdea1123]

I'd like to know if it implements the controls for DVCC, while some systems communicate back to the cerbo controller, they dont all form a closed loop control. So i would love to know if they can communicate the charge current limit or not, and whether or not multiple in a stack will contribute or negate from the charge current, if i use your shelf as an example (btw we used yours as an example to build our :), so thanks for the motivation) will a single shelf saying it didnt want charge prevent the other shelves from getting it ?

[@Default3568]

I'm wondering if you can use two BMS in parallel on the same battery bank. For redundancy and for separating loads of different priority. I already have a JK_B2A BMS and i'm interested if i could use this new one in parallel with that.

[@CollinBaillie]

Will you be able to test multiples of these in a parallel pack and tell us how the software handles config of individual boards?

[@evil17]

@@Default3568I dont see why you couldn’t, so long as both BMS’s aren’t pulling more amps than ur battery can safely deliver at any one time, probably not the way I would go tho, if one BMS can handle the load ur putting on it I would keep the second BMS on the shelf as a spare & get a bit more creative with the rest of the system.

[@rosmisha]

Dear channel author. I want to send you greetings from Ukraine. Many people from Ukraine watch your channel and study your research results. We're learning from you how to build your own backup power system to survive this winter. You are doing great work and your channel carries great intellectual value

[@stefanmargraf7878]

Slava Ukraine!

[@rich3317]

I’m in Odessa. We’re are you from?

[@offgrid2010]

Wonderful!

[@mornmorn8425]

When i see all these bmses and the hardware you own, i am so jealous! Man, thats insane!

[@OffGridGarageAustralia]

Yeah, it's getting a lot. Proper testing underway...

[@laurentsantaibambu7324]

Hi Andy and thank you for this video and the presentation of this JK BMS! I saw it on Aliex just a few days ago! And I thought.. finally..finally!! a bms with an active balancer included!! Great!! Can't wait to see it work.. but I'm pretty sure it will be the best! All that's missing a balancer at the other... let's hope that they will react afterwards... We are waiting for your test!!

[@OffGridGarageAustralia]

Well, we will see how the JK performs in future tests...

[@easypowerwall158]

So happy you have seen the light Andy. JK is the best. Tnx for sending them the cerbo so they can engineer it to the next level.

[@OffGridGarageAustralia]

Yeah, but...

[@doppelnippel]

Danke für die lehrreichen Informationen

[@OffGridGarageAustralia]

Thanks a lot for you generous support 🙏

[@dbag407]

An absolutely brilliant channel, straight forward down to earth approach, love your sense of humour.

[@OffGridGarageAustralia]

Thanks a lot for your kind feedback!

[@DannyCsaszar]

I love your excitement over the JK bms so much I just ordered one! Thanks for all you do and to all the help you have given me 😁

[@NedKLee]

Hi mate, it's not been the best day for input here on the Adelaide Plains today, but my #1 system, the system that runs my house, off grid, stand alone Solar is showing 0.003 mv deviation after working hard all day. I love the looks of this JK bms but I'm getting another EEL battery box and another 16 EVE cells with a Seplos BMS, that combination works just fine for me. II took weeks of tweaking to get the Seplos BMS right, together with a Neeeeeeeeey active balancer. I'm in a position where I spend more time away from home than I care to but I'm using Solar Assistant to monitor the systems and it all works just fine. Loving your videos, keep it up Andy, you're doing good.

[@OffGridGarageAustralia]

Thanks a lot for sharing Keith. The Seplos BMS with the NEEY sound like a good combination which will keep the packs balanced. I would do the same. Yeah, Seplos BMS can be tricky to setup until they work as you want them. But then, rock solid.

[@OffGridGarageAustralia]

Also thanks a lot for your recent generous donation! I need it 😁🍺🍺🍺

[@slimanus8m]

We are all waiting for part 2 :)

[@OffGridGarageAustralia]

It's uploading.

[@paulcurtis5496]

I was way in the back waving my hands-here I am!!!

[@InspectorGadget2014]

Wow! Nice! I predict this will be the new King of the Hill for the larger BMS-ses, JK really improved (again!) I look forward to your findings, conclusions and sharing of your experiences.

[@OffGridGarageAustralia]

Yeah, I hope they can work it out and make it perfect...

[@InspectorGadget2014]

@@OffGridGarageAustralia With your assistance and honest feedbacks, I expect they can make it into a better, if not, perfect product. But it may take a few S.P.A.T's ;-)

[@mandimandi2523]

apart from the non-integrated display...... this i miss....@@OffGridGarageAustralia

[@ricardomarcelino8388]

Now we are talking... all other BMS's seem to fall short in several aspects. Balnacing function to start, and having to ho through each and every one of them to program individually. Really excited to see this one going on "Andy's testing program" and the update feature seems a great advantage. Keep'em coming Andy.

[@OffGridGarageAustralia]

Wait for the next video, my friend!

[@Der_Hannes]

looks very promising to me!!! cant wait for further tests - THX ANDY! 🐸

[@OffGridGarageAustralia]

Uploading as we speak...

[@janbroz4681]

i was waiting for this video ever since the inverter bms was announced :D

[@OffGridGarageAustralia]

Here it is. And more to come...

[@pcmoeller]

Goil, genau das, auf was ich gewartet habe. Bin gespannt auf alle Tests und Antworten.

[@OffGridGarageAustralia]

Ja, da komm mal gleich wieder runter. Teil 2 kommt morgen.

[@FutureSystem738]

Wow Andy! It does indeed look amazing. I’m in love 😍 I want one, although I don’t need one. My old JK is doing a great job!

[@OffGridGarageAustralia]

Yeah, no need at all to swap.

[@savvasgerm]

Andy du bist der beste!!! Es macht Spaß dich anzusehen echt SUPER!!

[@leeshively669]

Thanks Andy for the size comparison of the B.M.S boards, I always wonder about this.

[@OffGridGarageAustralia]

Hey, it's not about size! 😉

[@tomarq]

Looking forward to Part 2. I ordered 5 of the 1A 150A BMS and they are expected this week. I have 5 sets of 280A LiFePo cells (16S for 48v) and I will be testing with Growatt and the EG4 18kpv (To get ordered next time it's on sale) I am also planning on righting some software so a Raspberry Pi can monitor the entire system and give me graphs. Stay Charged!

[@Juergen_Miessmer]

There is no need to reinvent the wheel. Look for HomeAssistant with InfluxDB and Grafana.

[@tomarq]

Yep, HA+ the extras will definately be part of what I'm playing with.@@Juergen_Miessmer

[@OffGridGarageAustralia]

You ordered 5 of these BMS!!!! You're very brave!

[@tomarq]

I am seeing the same issue with the v1403 firmware and I notice the v1407 firmware exists. I have 2 connected but haven't done any firmware updates yet. Looking forward to figuring out the steps to get them updated. After I get them updated, I will investigate the parallel linking. @@OffGridGarageAustralia

[@MyGoogleYoutube]

Get it working with the eg4?

[@Raphael_Hofmann]

I have one in the mail already. Can't wait to test it as well 🤩

[@OffGridGarageAustralia]

Hahaha, I bet you do have one on order...😊

[@rogereldridge8233]

I preordered mine, hope they arrive soon !

[@csabakertesz3]

Hello, I ordered one yesterday, hoping that thanks mainly to you, they have corrected the pediatric diseases. The dealer asked me which inverter it was for. After I gave the details, they consulted the manufacturer's technicians and talked me off the model because it doesn't communicate with the inverter. They learned from your case :)

[@abhishekkushwaha2455]

Eagerly waiting for part 2🍻

[@1705KAOS]

Waiting for the new video. Could you explain main benefits from older JK Bms version? I was planning to use a 150A 2A for my project with a Victron Multiplus inverter and a Arduino board with Venus OS.

[@mandimandi2523]

it was created primarily for the 16S-battery-banks. you can connect several 16s-banks (for example the EEL V4-JK boxes) and communicates also with the listed 48-inverters. Has the heater port .

[@BobHannent]

I just watched the last video, and when I get to the end, you have another one for me to watch! The BMS is added to my cart on AliExpress, now I have to wait until the next to decide if I buy?

[@OffGridGarageAustralia]

Yeah, wait for the next video...

[@tomaszszczepaniak2101]

I was waiting for this video for long time :D

[@OffGridGarageAustralia]

There will be more soon!

[@jackoneil3933]

The promise of a new paradigm in battery management...

[@OffGridGarageAustralia]

Exactly, it's a promise! Can they deliver though?

[@jackoneil3933]

@@OffGridGarageAustralia Well, we trust Andy will deliver the verdict on that...

[@offgridwithpojectham]

Andy, Super excited about this! Looking forward to your tests!

[@Bundyblu]

Another great video, eagerly awaiting Part 2. Nice to see you have communications with JK. I have a new JK BMS JK BD6A20S10PC and cannot get it to communicate with a Cerbo GX using CAN. If you can post a link to JK support some time that woul d be very helpfull. Keep up the good work.

[@testitester244]

Try the GPS Port which should provide TTL.

[@Bundyblu]

Hi thank you your reply. Tks I will try that. I only have one RS485 adapter with the correct 4 pin plug, but I am not sure if is a 16S. I identify it and try that.

[@TheAnthonyBrandi]

Which bms has the most features. A comparison video would be awesome. Great content.

[@offgridwithpojectham]

You're killing me with anticipation Andy! By the looks of your last post on KZbin, it appears the JK is killing you too. Man o Man! Why can't these manufacturers get it right?

[@OffGridGarageAustralia]

I don't get it either. It's insane that they make the same mistakes again and again...

[@j.w.u.5728]

Nice new piece of hardware! As for the mounting it shouldn't be too hard to create a model and 3d print something, not only as adapter for the display but also for the main board....but a simple metal bar with matching holes for the board is also pretty easy to create (its also much faster to do). The question is how much space is in the case. Now I'm looking forward to see which 3D printer you bought.

[@OffGridGarageAustralia]

There is enough space in the boxes. Metal work would take a lot longer than creating a 3D CAD file and print it. At least for me as I don't have a metal workshop.

[@j.w.u.5728]

@@OffGridGarageAustraliaHi Andy, it doesn't have to be fancy. Two simple bars of metal (maybe aluminium) with holes matching the screwholes in the case (2-3 holes for the top row and the same for the bottom) + 2x 2-3 threaded holes to screw the new board on the bar. At least that's what I get from what I've seen in the video. Depending how "bombenfest" you would like to have it it's either 2 or 3 mounting points on each metal bar. 😉 A 3d model is also quite simple. For the size/orientation is depends on the build volume of your 3d printer. I'm looking forward to see what you'll come up with. I currently struggle with a complex 3d design with different roudings that morph into each other to fix my headphones because of a broken plastic part...this evening I'll check the first prototype. Surprisingly so far no one else created a replacement part and uploaded it the the know places although the part is apparently identical on both successor models and was probably planned to break at exactly this point. Other than that I hope to work on my solar installation (12x 405Wp) on the garage this weekend...depending on the weather condition (waiting for one piece of hardware + change the angle of the panels for the winter to get a little bit more energy). Greetings from northwest Germany...not sunny but so far at least dry (the last couple of days were "Land unter")!

[@OffGridGarageAustralia]

@@j.w.u.5728Thanks for sharing your idea. Matching the holes correctly is already a challenge when you don't have the right equipment other than a battery drill. Yeah, I always listen to hr3 radio from Frankfurt in the Tesla and am aware of the flooding in your area...

[@showme360]

I would be interested in this new JK BMS on my 3 Mason Seplos battery packs, so will be looking out for the next video, where you try this Andy!!

[@OffGridGarageAustralia]

I won't try this in the next video. We have to wait for the full test results of the JK BMS and see how good it really is...

[@Dutch_off_grid_homesteading]

Heya, oh yeah that looks very nice. now we have to wait for the test's to see if this bms is the hole grail

[@DenBozhok]

Great purchase imho, and according to specs is gonna be a killer of many. Thnx for review Glory to Ukraine and sunny Australia!

[@OffGridGarageAustralia]

Thank you.

[@ajvz77]

😂 Enjoyed your excitement! I purchased my JK bms over a year ago and I haven't seen your videos on "industrial" bms models. So a current limiting feature, and that one attached red cable are not obvious functions to me. Can you provide some explanation on these features in your next video?

[@CollinBaillie]

I think the understanding of "industrial" would be: A BMS which would be used by professionals in the battery industry, to build battery packs for their customers. Hence industrial. It's a solution that offers "all" features you might want to include in a battery pack. Obviously, you don't have to be working in the industry with a customer base to be able to build a pack with these. Consider the Seplos Mason BMS, or the Gobel Power's Pace BMS that Andy has reviewed a lot in his recent videos. These are "industrial" BMSs. The very same that he compares the JK to in this video. The current limiting is a safety protection feature. If the current (draw or charge) exceeds a limit you define, it will switch over to the current limit circuit, so that the battery pack (including the BMS) is protected, but you do not lose power by disconnection as was common in earlier BMS implementations. The single red wire, possibly used to tap power for a device which you want to keep out of the main current path. You don't want to draw 250a through an LCD display for example. Or perhaps it could be for voltage measurement. Look up 4-wire Kelvin Method for Voltage and Current measurement. It could be a "partial" (or alternative) implementation of that. Edit: I rewatched the beginning of the video. It looks like perhaps Jikong may be using disconnect for the main path of current flow, and this single red wire is the current path when using the current limit circuit. Something like that.

[@ajvz77]

​@@CollinBailliethat is interesting. I have been considering a second circuit myself. A primary load circuit for all normal loads, and a second circuit just for low power applications like running a modern, and sensor monitoring.

[@OffGridGarageAustralia]

Here is a video, I made about the current limiters in these BMSes: kzbin.info/www/bejne/iKTFaaqIptmBqZI

[@gopikrishnayogarajah]

Perhaps with your influence JK will make available optional front cover replacement for Seplos MASON box

[@OffGridGarageAustralia]

I'm not sure if they are into metal work...

[@Володимир-д7о]

Is there a precharge function in BMS? Maybe it can be done through a separate resistor? How does the battery heating function work? As in the old versions of BMS, have they been updated?

[@drdos6718]

It's possible that there's a pre-charge. The screenshots I saw for the latest version (4.16.3) that I downloaded last week showed a "Pre-discharge ON/OFF" at the top. Didn't appear when I ran it, but mine are both older models.

[@wenhaowong5549]

I hope they will improve their LCD graphical quality and functionality , looking forward for the testing video, always learn something from your video, thank you andy

[@OffGridGarageAustralia]

Thanks a lot!

[@stevenfrazier8939]

I share your excitement about this BMS. I will have a Lux Power 12k inverter charger and it is on the list.

[@markseamans4682]

You are going to love a 3D printer. I use tinkercad to make all kinds of parts/brackets. Really handy. In fact, mine is in my RV sitting on top of my 48kw of Eve cells.. heh. Yes. They are enclosed.

[@OffGridGarageAustralia]

I'll pick it up from the post office tonight! Yes, I looked at TinkerCAD and watched a few video tutorials. Seems pretty good and will do everything I need it for. Do I need to slice the files or does the printer work with the STL file directly. I couldn't find out...

[@markseamans4682]

@@OffGridGarageAustralia yes. There are a few free ones. I use a Simplify3d. It’s not cheap. Let me know if you need anything.

[@chrisk.3839]

Hi Andy, the JK BMS in the Video looks different to the picture on your Website. Can you explain it. Can't wait for more details.

[@roelofdekker487]

Hi Andy, I am currently running two of the earlier JK's and they are just fantastic. This new version looks great also, however there are two things they should have included. Upgrade the balance current from 2 to 10 amps - adjustable Wifi connectivity. Please let us know what you think. Thanks heaps Andy for your ongoing contribution to us Solar enthusiasts. Cheers Theo from Goodna QLD

[@jk.ess.solution]

wifi we will consider it

[@videoflieger1239]

@@jk.ess.solution Thank your very much for listening to your customers and the community here 👍❣ I just bought two of the new Inverter BMS for testing them with multiple parallel battery packs...

[@sjdtmv]

I have ordered one, 150amp x 2 amp balance,I hope they can do MQTT logging somewhere down the track

[@OffGridGarageAustralia]

Hmm, that will be interesting.

[@Skeptic100100]

I am currently running 4- JK BMS's, I'm relatively happy with them, however, 1) I would appreciate better communication when they push out the updates, those of you who have experienced some of these know what I'm talking about. 2) I wish they had a U.S. based store to handle issues WHEN the BMS heads south and requires replacement. Shipping to China costs more than the replacement of the unit.

[@asabriggs6426]

It would really be great to see the JK-BMS firmware (and associated test suite) being made open-source. This would really be a stand-out feature, aid debugging of BMS quirks and enable (slightly better) validation of what is deployed. I do understand that making incorrect changes to the firmware might at best cause the device to brick, however that is still the case for a firmware update released by Jikong. It probably will not happen because of ownership (presumably Jikong subcontract part of the design process), but it is nice to dream!

[@OffGridGarageAustralia]

Yeah, they probably need a lot of help with their software...

[@petski999]

Am I missing something??? 200A discharge, but only 10A charging limit? The only references to charge current limiting in the datasheet seem to disagree. One spec shows 10A the other 25A. What do they mean by "Parallel charging current limit"? Is this referring only to the balancing function? I have 48V 1200Ah LiFePO4 bank and need up to 110A charging capability.

[@ВладиславМартишев]

Imagine you have 10% SOC battery and 100% SOC battery. What happens when you will connect them in parallel? One will charge another with huge current. So it is why 10amps parallel current limiter required

[@evil17]

@@ВладиславМартишевahh, I was wondering what that was about, thanks. I guess this is a good idea/feature to have, but I am a bit sceptical of the need for it, as Andy has shown & I have witnessed myself, these large currents dont last long & aren’t that large anyhow compared to normal charging and discharging currents when running microwaves, air cons, air fryers, etc from inverters, those initial currents don’t seem that large. I hooked a flat 24v 5kw battery to another full SOC battery of same capacity once to wake up a BMS, and when it woke up it was pulling 80+amps for a short while & then went down fairly quickly, it probably spiked much higher for a very short time before i got to see the amp draw, but it wasn’t that drastic really, the microwave & coffee machine can make it spike up to 140A or more.

[@OffGridGarageAustralia]

The current limiter will kick in when over current protection is reached. Other BMS would now turn off altogether, these BMS all have a 10A/20A current limiter and just reduce the current. They check after a minute until the current is below the over current protection.

[@dougle03]

Could you do a video on connecting this BMS to the Victron Cerbo and any programming needed to get it up and running? That would be great

[@OffGridGarageAustralia]

For sure I will do that!

[@audiestri8424]

hello andy, what does it means that this new bms can work in paralel? can we use 3x new bms for 3x battery pack in battery 2.0 shelf and then connect to converter? and converter cannthan see each battery pack information? thank you

[@OffGridGarageAustralia]

Yes, exactly. It's the parallel communication these BMS provide. The inverter gets information from all batteries connected in parallel.

[@henvern]

I would like to know whether the 100A model has a more sensitive current shunt and thus more accurate SoC tracking.

[@OffGridGarageAustralia]

I doubt that. It's the same hardware just the amount of parallel MOSFETs will be different.

[@henvern]

@@OffGridGarageAustralia if they vary the number of MOSFETs then it is quite easy for them to also vary the number of shunt resistors. For example, 4 resistors in parallel on the 200A model. Remove 1 resistor for the 150A and remove 2 resistors for the 100A. That doubles the current sensitivity and saves them a few cents.

[@OffGridGarageAustralia]

@@henvernyeah, I don't think they are doing this with their different models.

[@RandomPenner]

Hi Andy Did you figure Out what the Connections on Minuten 2:57 are?

[@OffGridGarageAustralia]

Yes, the bottom one next to the other connectors is for the display and power button. The top single connector is for the battery heater.

[@RandomPenner]

@@OffGridGarageAustralia thx Mate 🤘

[@koenburkink2704]

​@@OffGridGarageAustraliaDo u know what current the heater can be without external relais?

[@OffGridGarageAustralia]

@@koenburkink2704 I think it can handle 3A maximum when directly connected.

[@koenburkink2704]

@@OffGridGarageAustralia Thanks, for safety better use a relais.

[@anthonynowlan9765]

I wonder if the pinout on the front panel cables matches existing brands? new plugs?

[@OffGridGarageAustralia]

The communication board and balance cables are the same as on the Pace BMS. Nothing else is interchangeable.

[@JunSi3010B]

Where is an 18 oder 20S version? ;-( And what is a “10A parallel charging current limiting” and why is the coil referred to?

[@OffGridGarageAustralia]

The current limiter video. It's all here 😉 kzbin.info/www/bejne/iKTFaaqIptmBqZI

[@galaxyiphone2681]

Good evening I wanna know if jk better than seplos for solar energy storage 🙄

[@OffGridGarageAustralia]

Well, we don't know yet. I'm still testing...

[@leumel900]

Is the "old" style LCD Display compatible with the "new" style BMS?

[@OffGridGarageAustralia]

If it has the same plug it should work.

[@rraymakers]

how would you fit this in the EVE vertical diy kit?

[@OffGridGarageAustralia]

I guess, we will find out soon.

[@KossuJahvetti]

I'm refreshing my KZbin 17 times a day, mate where is the part 2 of new jk beast?! As they say, don't let crazy people wait for too long :)

[@OffGridGarageAustralia]

Give me some time to breath, man 😁

[@wayne8113]

Thanks Andy

[@OffGridGarageAustralia]

🥈

[@rulexi]

Part 2 ready yet? Greetings from Arizona

[@OffGridGarageAustralia]

Yes, it's uploading...

[@djredix4358]

How do you connect a normal JK BMS to the CerboGx? Thanks for your videos. Keep it up. Lots of interesting things about it.

[@OffGridGarageAustralia]

I've shown this here: kzbin.info/www/bejne/qXmsnYNopK9merc

[@djredix4358]

@@OffGridGarageAustralia THX!!! TOP Video!

[@engsam7759]

Dear andy , can you please test JK new Smart Shunt and how does it compare to victron smart shunt especially in long term accuracy. I heard that most similar products drift overtime if they don't get periodic synchronizations which rarely happen in winter

[@OffGridGarageAustralia]

All shunts will drift, regardless which one you use. They all need frequent calibration. So, which one do you trust???

[@engsam7759]

@@OffGridGarageAustralia offcourse I trust victron over chinese products like Aili shunt. However i wanted to know if these new shunt from JK is close to european products rather than chinese . best regards

[@rulexi]

I hope to see you plug them into the Victron MPII you have.

[@OffGridGarageAustralia]

Yes, I will in the next video coming tomorrow.

[@rulexi]

Excellent news sir

[@DanBurgaud]

12:52 Aren't these Inductors for Charge Current Limit functionality???

[@OffGridGarageAustralia]

Yes, that's what I said 😉

[@moestrei]

So what exactly is an inverter bms? Wouldn't it be more important for the bms to talk to the mppt solar controller?

[@OffGridGarageAustralia]

They call it inverter BMS as most people use an hybrid inverter which can also charge the battery and solar is connected to this inverter as well. But yeah, it will talk to the Victron Venus OS for example and control the MPPTs.

[@moestrei]

@@OffGridGarageAustralia Thänks! I use 4 Epever MPPTs and I cannot allow the BMS to disconnect them from the battery. I might disconnect the solar input using Solid State Relays or something.

[@OffGridGarageAustralia]

@@moestreiThe BMS should never disconnect the battery unless there is something wrong. The BMS is there to protect the battery, not your other equipment. You can built a save solar disconnect yourself. Use a voltage detection module and let it trigger a contactor which disconnects your solar. In this case the Epever stay connected with the battery.

[@tiborchren]

The best and cleanest way to replace another BMS with this one in a DIY box is to replace the entire front plate with new cutouts and holes for mounting the BMS. Laser cutting isn't that expensive and it sure can be found locally everywhere. But I suppose if there is a demand for it, there are plenty of DIY solutions, but also plenty of ready-made replacement front plates on various e-shops. It's going to be a bit more complicated with those round corner boxes. But I'm sure there will be DIY boxes just for this BMS, so just wait and no question there will be, but when will they be available.

[@OffGridGarageAustralia]

Yeah, I expect this as well. The front plate of the MASON box is not straight flat on the back site and has mounts for the fuse for example. So, there needs to be some welding done as well. Replacing the front plate would be the best solution. You can even get such services from China directly if you deliver the drawings.

[@haneefacellonics7239]

Sir,,have any BMS including with wi-fi facility?

[@OffGridGarageAustralia]

Daly has now a Wifi connected BMS. I will test this soon on the channel.

[@larsandersen2048]

Any possibility JK will work on 18 or 20sBMS? I do run 18s on my Victron system to improve storage with approx 2 extra kWh.

[@OffGridGarageAustralia]

Not the new one, I'm afraid. Due to compatibility, most people just run with the 16s system and get a second battery if they need more storage.

[@mandimandi2523]

and invertes like Deye have a limit of 60V...(16S x 3,65 = 58,4V). Actually i have my maximum at 3,47V = 55,5V@@OffGridGarageAustralia

[@realeyesrealizereallies6828]

Interesting...Looking forward to the feature list...I don't have communication with my current JK BMS (EG4 inverters), of course I don't think I ever tried to connect it yet, in my, if it aint broken, leave it be, style....Not sure I would benefit from communication, user defined works like a clock...But, who knows...

[@JohnBercow-e1h]

Hi Andy. Amazing tutorial! I have question may i connect this bms to the battery and use it with inverter without any support communications ports like CAN, rs485? Thanks

[@OffGridGarageAustralia]

Yes, sure, that will works as well.

[@gruetoo1]

instead of 3D printing a bracket... How about replacing the whole metal front panel? In this fashion you can still use the Seplos should you choose by swapping out the front plate.

[@OffGridGarageAustralia]

It's not a straight plate though and has mounting holes and brackets for the fuse at the back. But yeah, would be the cleanest option.

[@cubeamspro1003]

Can it balance more than one cell at the same time? Thanks.

[@OffGridGarageAustralia]

No. Like the NEEY, it handles only on cell at a time.

[@cubeamspro1003]

@@OffGridGarageAustralia I seeee... :-) That would be a cool feature for a BMS and it will balance way faster!

[@nunoganho]

Nice... I'd llike to see it installed on vertical seplos.

[@OffGridGarageAustralia]

OK

[@toly11041982]

Hello. Please how do stick the température sensors on the LiPoFe cells ? Some details please ? Thank you !!

[@Fergo101]

Do all these JK BMS’s work together? I am thinking of using these for several battery packs - which I will continue to build over time. I don’t want to end up with 3 or 4 of these only to find they have been replaced and the new version won’t communicate with these. ?

[@OffGridGarageAustralia]

Good question. I hope it will be only firmware updates being necessary.

[@tiborchren]

Why are the blue capacitors visible on the original pictures and on the pictures on the JK BMS website and they are not on this model?

[@OffGridGarageAustralia]

Some last minute design changes. Not the only one, I'm afraid.

[@drjaca5126]

Greetings, off-Grid Garage” from Puerto Rico Caribeean Island USA. I am very eager to see that “”JK-BMS” working. I have three Rack-type LiFePO4 batteries and different capacities connected in Parallel. My solar system is all 24Vdc and I have 8.7Kw of solar panels and plenty of sun in the Caribbean. I also have four Renogy Rover 60A solar chargers to charge my LiFePO4 battery bank of 20Kw in total with the sum of my three batteries. The BMS are 24Vdc and my inverter is 4Kw at 24Vdc. I want to upgrade to a Schneider Pro 6.8Kw 48Vdc inverter. Also change the BMS from 24VDc to 48Vdc with active balance of JK-BMS. They are a fan of yours and I never write to you and I am subscribed to your channel and I always give you a “Like”. You do everything better. I want to see that JK-BMS project to jump from 24Vdc to 48Vdc with my 20Kw of LiFePO4 batteries. Thanks for your channel, drjaca

[@OffGridGarageAustralia]

Thank you.

[@evil17]

Good job Andy, look forward to seeing the testing of this new beast, it does look nice but will be sticking to the old JK’s for now, they are all working a treat. So could you use one o these relays to switch a solar dump load like a hot water system when SOC reaches say 95%? I’m sure you will wow us with all the new things u can do with the 3D printer. Cheers

[@OffGridGarageAustralia]

Don't change! The old JK is brilliant and if it works, keep it.

[@daniele9160]

hi, given your experience, on a 2p16s system with a 4A neey 4th active balancer, what do you recommend as a BMS, a seplos or the new jk? I currently have that piece of junk Elerix installed which only gives problems with incorrect voltage measurements and continuous system shutdowns and I want to replace it with one of these two BMS. thanks

[@gertohberg8721]

looking forward to your testing with the new jk! on your site you have the link to the NEEY 15A Smart Active Balancer and there is somting starnge going on with the seller becose the price is 17 € and the latest comment said they got some other pruduct

[@OffGridGarageAustralia]

You have to select the NEEY 15A balancer on the site, not the NEEY adapter for $17 😉

[@pawedanielewicz5966]

Will this BMS connect to the Sofar Solar inverter at this time?

[@iprrr]

HI Andy! In the bms there are two cables both going to cell no. 8. How did you set them up? Thank you

[@OffGridGarageAustralia]

One is cell 8 - and one is cell 8+. Please follow the wiring instructions for the BMS. I've confirmed with JK, that the 8- is not necessary to connect.

[@ronconcrete]

Hi Andy, do you know if it is possible to connect 2 strings of 8 cells in parallel (24v) to this BMS? I can't find it anywhere.

[@mandimandi2523]

this bms in too expensive for this purpose. get this model JK Smart Active Balance BMS B2A8S20P - (4S - 8S) - 200A -with HEATER PORT or without . with heater port has the extension "-HC". i use this for 24V-System. and get the small 2,5" LCD to initialize the BMS (2times)...

[@GregOnSummit]

Newbie question ... but what does the "Inverter" part mean? It can connect to an inverter, or something else? Also, Is there any logging capability that you can download or have posted to a database?

[@OffGridGarageAustralia]

They call it inverter BMS as most people use an hybrid inverter which can also charge the battery and solar is connected to this inverter as well.

[@matbarley5494]

Wonderful video. BUT I still do not understand the difference in between the 2 versions of JK-BMS: -first: black plastic housing type B2A-xxx and -second, the one presented here, metall sheet type PB2A-xxx??? So what makes the difference in between B and PB? Thanks from the geographic center of Bavaria/Germany to anyone who can help me to decide.

[@mandimandi2523]

das neue bms ist für den anschluß von mehreren 16s-boxen und der kommunikation zb. mit dem Deye hybrid -WR. auch hat es den Heizanschluss, was bei den bisherigen nur für die -HC variante gilt! Darum findest du auch die Jumper (rote Schalter) für mehrere 48v-systeme... SOC usw. leider gibt es kein integriertes display wie bei seplos etc. und ein WIFI-Modul wäre auch noch wünschenswert. Muss mal schauen ob es über den Deye funktioniert wenn er im Haus ist ....um Daten über das Internet abfragen zu können...

[@erikkottier8907]

I thought the older JK BMS had also active balancing like the B2A24S20P?

[@OffGridGarageAustralia]

Yes, all JK-BMS have active balancing PB series and BD series.

[@andreas4175]

Hi Andi - I'd love to get my hands on one of those. But I've just finished putting together two Seplos-based batteries and don't want to take them apart right away again ;) I am still wondering, though, if you now run your batteries at the higher voltage - or if you go back to 55,2V. Or is that experiment still running/that decision not taken yet?

[@andreas4175]

@@ivanbremer8662 Thanks a lot for your detailed answer. I actually had seen that video and the conclusion concerning the passive balancing. But what I wasn't sure about was whether this also meant he'll go back to 55,2V or whether staying at the higher voltage is better, e.g. to address the Seplos SOC reset problem (I think there a higher voltage was needed?!)

[@OffGridGarageAustralia]

Experiment is still running with the higher voltage until next week.

[@andreas4175]

@@OffGridGarageAustralia Looking forward to the corresponding video :)

[@lotechgreg]

Seems like a great opportunity for an enterprising someone to produce front panels/mounting solutions for the battery rack cases out there, and/or a case for this BMS......

[@OffGridGarageAustralia]

Yes, absolutely, replacement front panels for the EEL and Seplos DIY boxes matching the JK-BMS.

[@mandimandi2523]

EEL has now the proper box. EEL V4-JK 48V-Box......

[@offgrid2010]

I don't understand what you're saying about the switch. Does this model require a switch to keep the internals from draining while in storage?

[@cbinett]

Will is getting some serious competition here... 8-)

[@OffGridGarageAustralia]

Ah, thanks you. He's more in selling batteries now, I guess. He's not testing much anymore unfortunately.

[@westcoastangler9839]

Hi I want to make a large plant of around 40kw. lifepo4. of course BMS' must be a jk. with active balancer.. but what are your thoughts. I have the opportunity for 6 months of the year to charge with approx. 30 kw per day on average.. the consumption is approx. 7 to 12 kw / 24 hours.. i live in northern europe ( Denmark) so there will be bad weather days too... so the question is.. should I make several small banks of e.g. 10-15kw which can then be used separately or is it more sensible to make 1 large bank of 500A, it won't be 40kw, so it will probably be 2 banks of the same 20 - 25kw. the piece. The idea was to have capacity for 3 to 4 days with poor sunshine conditions. for info I am an electronics engineer and have the right relays with arc breakers to make an automatic switching system together with a plc that monitors the system. any information is greatly appreciated.. many thanks, kim.

[@OffGridGarageAustralia]

I would definitely built several battery banks, each with their own BMS and parallel them afterwards. In case on needs maintenance, you can just take this one battery offline and the rest keep the system running. I've got some Carlsberg in my S.P.A.T. fridge at the moment. You may have heard of it...

[@westcoastangler9839]

@@OffGridGarageAustralia yes I just sent you a spat too.. it is well deserved.. these are some very informative videos you make.. I may have more questions on hand as I approach the project.. and more spat will of course follow.

[@mandimandi2523]

how could you build a large bank of 500A? you mean 500Ah? well, the biggest prismatic cell available has 304Ah..... , so build 3 banks each 280Ah or 304ah ....

[@raffy323232]

hi andy! just bought that bms... notice that there are 2 "B8" terminal in the balance leads.... which one should i use? tnx!

[@OffGridGarageAustralia]

Have a look at the wiring diagram. The second cell8 cable is not necessary, just connect all the battery + as usual.

[@sgn8471]

Hi Andy, i got a question, i got jk 2a 6-24s 200a , the black one, 48v battery bank, can i parallel together with the new jk inverter bms..??? Thank you so much

[@OffGridGarageAustralia]

Yes, you can, but no communication between the BMS and your inverter.

[@noelbondad7423]

Jk bms a new one? Id like to see this😀

[@MPolderdijk]

I realy like to known it's own power consumption/standby power

[@OffGridGarageAustralia]

OK

[@patrickruiz6764]

Hi Andy I find no info on Windows software like JKBMS Monitor not find in addition he said to me who did not have for Windows !!!

[@OffGridGarageAustralia]

Linked on my website under the new JK-BMS, my friend off-grid-garage.com/battery-management-systems-bms/

[@patrickruiz6764]

hello ok very goud thank you andy

[@nedxell6017]

As i liked what i seen on your review, i thought after half a year without BMS- i need to order and install this one. Finished today, working. Next step is to connect to Solax X hybrid. Any ideas which cable i need to use?

[@nigelcharles511]

I would like to know the benefits of this new 'industrial' JK BMS over the physically smaller older JK BMS's. I am running three older 16S/200A/2A JK BMS's. Each is controlling a 16S2P pack and they all seem to work well so wonder what I will be missing out on with the new version.

[@CollinBaillie]

The selling point of this new BMS is its ability to communicate with and be controlled by your inverter. A more integrated component of an energy storage system. Also communication between multiple packs using the same BMS board. Maybe JK have finally implemented Andy's "single pane" management console, so you can tweak settings on individual BMS modules from a single common connection between PC and Batteries. Let's hope Andy has more than one of these new BMS boards and enough cells to test a multi-pack setup.

[@nigelcharles511]

Thanks for the info. Two of my three packs are in trailers taking power between locations so each pack is being charged and discharged independently. Although the benefits of the new BMS are impressive, they are probably not a game changer in my particular application. It will never the less be interesting to see what we all learn as Andy takes us on a journey of discovery.

[@mandimandi2523]

and the new one has the heater-function. the older model have this only when order with "-HC"@@nigelcharles511

[@tiborchren]

I expect we can enjoy the usual in-depth testing in a multi-episode video series. :) I'm very interested in those programmable customisable relays that could be used to program the heating or cooling the battery pack depending on the battery temperature. The original JK-BMS had versions with a heating function, does the Inverter JK-BMS have this heating function? In addition to the possibility to connect to the BMS using a computer cable and Bluetooth application, in the future I would like to have the possibility (future revisions of this BMS) to be able to connection to the BMS through Wi-Fi from anywhere in the world where internet is available with full access for monitoring and settings. I would also like very much to be able to easily connect Inverter JK-BMSs to Home Assistant with full monitoring and settings, I suspect that the possibility of integration into VenosOS-VRM and Solar Assistant will be standard, as there is this option for the previous JK-BMS.

[@OffGridGarageAustralia]

That would be great if we can get external access to the BMS and also full integration in automation systems. That part should be the easiest. JK was talking about a full integration to Venus OS with both directions of communication. I'll definitely do more testing with this BMS and also more videos. I want to see if this is the one...

[@VoltageLP]

Damn, just ordered a plain B2A20S20P for my 16S solar inverter battery, should I upgrade to PB2A16S20P? What are the benefits?