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...

[@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...

[@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...

[@dbag407]

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

[@OffGridGarageAustralia]

Thanks a lot for your kind feedback!

[@paulcurtis5496]

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

[@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 😁🍺🍺🍺

[@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 😁

[@slimanus8m]

We are all waiting for part 2 :)

[@OffGridGarageAustralia]

It's uploading.

[@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!

[@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.

[@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.

[@Der_Hannes]

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

[@OffGridGarageAustralia]

Uploading as we speak...

[@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

[@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.

[@janbroz4681]

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

[@OffGridGarageAustralia]

Here it is. And more to come...

[@savvasgerm]

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

[@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...

[@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 .

[@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! 😉

[@abhishekkushwaha2455]

Eagerly waiting for part 2🍻

[@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...

[@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?

[@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...

[@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...😊

[@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.

[@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 :)

[@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...

[@stevenfrazier8939]

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

[@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.

[@tomaszszczepaniak2101]

I was waiting for this video for long time :D

[@OffGridGarageAustralia]

There will be more soon!

[@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...

[@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.

[@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

[@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.

[@offgridwithpojectham]

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

[@rogereldridge8233]

I preordered mine, hope they arrive soon !

[@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...

[@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.

[@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!

[@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

[@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.

[@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...

[@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...

[@wayne8113]

Thanks Andy

[@OffGridGarageAustralia]

🥈

[@TheAnthonyBrandi]

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

[@keyem4504]

So curious. Let's see what you find out. This could indeed become the best BMS in town.

[@OffGridGarageAustralia]

Fingers crossed🤞

[@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.

[@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.

[@dennisbrok9335]

Cleaner more precise and consistent yes this is not how 3d printing works it takes some work to get clean and precise prints but you can do it can’t wait for the 3d printing video creating parts with the power of the sun

[@jmaus2k]

The power terminals need an insulator to stop a lug from touching the aluminum heatsink or the neighboring lug. Most electronics give a few INCHES ....not MMs for clearance. This BMS looks very promising. That 2A balance current is getting there.

[@OffGridGarageAustralia]

Yeah, that's a good point. I'll test this with some 70mm ring lugs.

[@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 😁

[@asderven]

I get the feeling this song was from taal, or another movie. Have definitely heard that sound track. I ordered this bms in last week of September, they’ll be shipping it this month for me hopefully, otherwise November 😊

[@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.

[@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.

[@Shep5847]

Now this is a BMS that has the potential to replace the Batrium BMS’s if they can get a few things right! And I hope they can!! A coupe of things I would want to see is the locally attached display be able to show a bar graph much like how Batrium does. With a bar graph representing each individual cell, you can see so much more information than just one value at a time like voltage. I would also like to see their desktop software be able to display all daisy chained batteries in a common interface at once. So if you have 4 packs of 16S each, you should be able to see them all and interact with them as a whole or still individually. So if I needed to put a pack into “maintenance mode”, I should be able to set it in the software (and from Venus OS) on that individual pack and the midgets should stop the flow of power in and out of the battery or as defined by the “maintenance mode” settings for that pack. Also, you have one set of values to configure and manage for the whole system and not on each individual bms when they are all daisy chained together. And if they loose comms at some point, they should continue to operate under the last known settings provided by the ‘master’. Lastly, the BMS should support all common voltages without having to buy another BMS if you need to change voltages. I.e. 12, 24, 36, & 48. If they could do these things, while still being able to connect to Victron, that would be impressive and I would replace all of my Batrium BMS’s with it! Because the one thing Batrium doesn’t have is power flow control. I.e. Power in but not out mosfets.

[@OffGridGarageAustralia]

Most of your question will be answered in the next video, Part II

[@wideawaketotruth5301]

ANDY! My man. Still handling business.

[@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!

[@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!

[@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.

[@5885ronny]

Danke fürs Video 👍

[@OffGridGarageAustralia]

No problem.

[@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...

[@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?

[@vp3319]

Thanks, welcome to 3D world. 😄

[@OffGridGarageAustralia]

Yes, looking forward to this. Printer has arrived today...

[@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?

[@MPolderdijk]

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

[@OffGridGarageAustralia]

OK

[@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.

[@noelbondad7423]

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

[@nunoganho]

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

[@OffGridGarageAustralia]

OK

[@vonasi2]

The relays need to open when any charge disconnect event happens. This could then be used to cut the field circuit to an alternator and so prevent diode damage on LifePo4 systems that are fitted to boats and campers. At the moment people are doing bodges involving LifePo4/lead acid hybrids as a budget solution to protect their alternators but a 12V/24V BMS with a disconnect relay would provide a much cleaner solution.

[@OffGridGarageAustralia]

Hmmm, once the relays are customisable, all this should not be a problem any more.

[@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 :)

[@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]

Part 2 ready yet? Greetings from Arizona

[@OffGridGarageAustralia]

Yes, it's uploading...

[@team13thirteen]

Nice... can't wait for it :D

[@ShauneAlcott]

Hi Andy...Just had a look on EEL site and it seems they have the new JK-BMS , so I assume it must fit in there DIY kits possibly ???

[@OffGridGarageAustralia]

I'm in contact with EEL. They probably will wait a bit until the new JK matures in terms of software but will eventually switch. Just a guess though.

[@mandimandi2523]

now available EEL V4-JK.....

[@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.

[@stephenhanson069]

thanks for the video, ... your workbench may benefit form a piece of B Grade melamine (good one side). The thicker, the better. It makes an excellent table top and easy to install on top of existing table.

[@OffGridGarageAustralia]

Yeah, but the whole charm of this old wooden benchtop goes away then. I like the old paint, the scuffs and burn marks. It has obviously seen a lot of DIY work in its life.

[@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

[@doppelnippel]

Danke für die lehrreichen Informationen

[@OffGridGarageAustralia]

Thanks a lot for you generous support 🙏

[@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 😉

[@leumel900]

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

[@OffGridGarageAustralia]

If it has the same plug it should work.

[@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.

[@panospapadimitriou3498]

off grid garage is the place that has so many lightning strikes when sun is up!!!!,,, and the frankenstein word is heard

[@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.

[@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

[@locke987]

Monday morning if I'm correct in lipreading...we will take you by your word....a promise is a promise and cannot be broken🙂

[@OffGridGarageAustralia]

I didn't say Monday 😉 There were some... complications. It's uploading now.

[@tiborchren]

It's great that you're getting a 3D printer. It'll be a great tool for your DIY projects, but for complete DIY designs you'll need to learn some 3D CAD if you don't already know it, and to learn how to slice well in slicer. I'd be very interested to know what 3D printer you chose. Perhaps there will be an Andy 3D printer channel in the future :)

[@OffGridGarageAustralia]

Printer has arrived today and I watched a few TinkerCAD tutorials. Seems very straight forward. I think the printer can handle the STL files directly, so no slicing necessary. But I will find out shortly, I guess...

[@tiborchren]

@@OffGridGarageAustralia Every 3D printer needs a slicer. The 3D shape is created in CAD, saved as STL, and the slicer cuts the STL model into individual layers and provides the 3D printer with technological settings according to the used material: temperatures, number of perimeters, percentage of infill, shape of infill, perimeter and infill speeds and acceleration, supports, and much more. There are many free and payable slicers. Some 3D printers have slicer program from the manufacturer. These settings exist for every 3D printer and material combination and are fine to start with, but usually need to be slightly modified - fine-tuned because every piece of the same 3D printer is a little different and everyone has their own local conditions - temperature and humidity.

[@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

[@kipdennis3796]

Yess jk bms🎉

[@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.

[@jo8ephthomas]

Andy’s 3D print garage

[@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.

[@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

[@TheRonskiman]

You're going to wonder how you ever managed without a 3D printer, but its a bit of a steep learning curve, but well worth it.

[@OffGridGarageAustralia]

I'll manage, having worked in IT for the last 20 years. The printer has arrived today...

[@TheRonskiman]

@@OffGridGarageAustralia I sure you will, but, well, you'll see what I mean ;-)

[@universeisundernoobligatio3283]

Looks like in nice pice of electronics, the red wire could be a little slicker with a PCB connector instead.

[@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.

[@pcMuneer]

BMS and BGM is fresh I think 😅