@@OffGridGarageAustralia Nice. They should include these profiles with the app so that it would be simple even for newbies to select Andy's LFP defaults. :)
@@OffGridGarageAustralia pin 1 is B pin 2 is A for RS 485. But it does not communicate. Can you please upload a video to show how we can establish communication between solax and jk inverter bms.
Andy, There are 2 major issues which need fixing. 1. Cell voltage jumping issue. Where cell voltage is erratic when used with inverter. 2. Soc 100% issue. This setting is ruined in inverter Bms. It used to work well in older black model. Soc has become very inaccurate now. I have emailed you with videos & proofs. Pls check. Also JK does not reply to me, which is concerning.
You and a couple other battery, solar, BMS Ytubers are.... and have been at the forefront for bringing the quality of these products UP to an amazing level so that everyone in the world can benefit from you're work. Industry changing really... Something to be proud of for sure! Thank you for all you do Andy. (Almost up to 100k!) and for good reason... 🤘
Thank you, Andy, For all your work and the brilliant videos. It makes it so much easier for all of us to choose the right products. Just received 2x EEL battery vertical housing (with JK-PB2A16S20P), 2x “Peter Board” + 32 Gobel Power MB31's and lot's of Victron equipment. All based on the info from your videos. Thank you so much!!
Great work Andy getting JK to engage with you again. A feature I'd like to see is the ability to save configurations to an external file, and then upload configurations from an external file. So that you can have your config backed up, as well as making setting up multiple batteries much faster in the configure one, then apply to all others approach. Take care D
RCV Time Bug in V15.30 Hi Andy, thank you for your great support and the results you can achieve with JK. I have found a major bug in the current firmware version. The BMS no longer applies the RCV time parameter. After the RCV time has expired, the BMS does not switch to the RFV cell voltage. Accordingly, the charging voltage (CVL) in the GX device remains set to 55.2 V throughout the day (RCVx16). This means that my 2 batteries are charged at 55.2 V for approx. 7 hours a day. Andi, you may not have enough amps outside to be able to check this. Can someone from the community check in the VRM portal whether my observation can be confirmed?
Hello, I can confirm that. There are still enough amps out there in Germany.😎 After the update to V15.30 everything is going well so far. But now I have the same problem that the float mode no longer works.
ja! ja! ja! ja! sag niemals neeeeeey! Weihnachten und Ostern können also doch auf einen Tag fallen! 🎉🎉🎉 Thank you for your effort, and Thank you JK for listening to us!
Thank you very much for the firmware Andy. Just to let you know that we can still reach DIY Eve batteries with JK with 15KW under 1650 Euros in Europe.
100% soc charging cut out is a big issue for the AIO inverters. Intrested to see how this is addressed in the next video. Also, i would really like to see. The heater control logic with its own set points. Right now, it will turn on at charge UTP and of at charge UTPR. Which results in a constant cycling. Between charging and heating.
Andy to be fair JK is only talking to you and not their customers. This is causing community concern in the forums because they aren't communicating to anyone else. Did they shed any light on their behavior? It's really causing people to second guess further purchases.
Fantastic Andy and community!! This is giving me the incentive to keep buying. Love the part where the battery ID is shown when using multiples. Awesome Andy all 👍
Well done, great result. As a recent convert to JK I do have one observation that it would be nice to address: Most programable BMS have a pack over voltage disconnect as well as a cell over voltage disconnect the JK doesn't seem to have this and everything is done on a cell voltage basis. As I often use the frankenstein approach due to my source of cells this can be a problem. I would normally have a pack charge disconnect of 3.5vpc (56v) and a cell over voltage disconnect of 3.65vpc this gives best balancing performance as it enables the pack to continue charging while the high cell(s) is / are being brought down. If the cell over voltage is set to 3.5v this causes a pack charge disconnect while the other cells may be in a relatively low state of charge and the balancing at this level doesn't last long before the 3.5v cell is down with the others however it is still well out of balance with the result that it never really comes back into balance. This is the situation with the JK BMS and i have to set the cell disconnect voltage a lot higher than 3.5v to get good balancing yet, when balanced, I want to keep it at a pack disconnect of 56v which means I have to constantly change the settings. As this is for propulsion packs on boats they can spend some time at a full level and i prefer this to be 56v rather than around 58v. So, in summary, I think it would be good to have a pack disconnect independent of cell over voltage disconnect. This would then also make it suitable for use in hybrid systems which have an increasing following for those retrofitting lfp to boats with lead acid charging equipment and where the balancing effort is important due to the limited time in normal use that it is available for.
JK-inverter-BMS issues that have been discussed on the channel in the past: 1. "SOC 100% reset" - it resets when the highest cell reaches a specified voltage - not very good. One idea was to reset when Absorption ends. Another idea was to add a Tail Current setting like the Victron SmartShunt. Another idea was to reset when ALL cells are above a specified voltage (not just the highest). 2. Can you set the Float timer to a very long duration (7 days, 168 hours)? Keep the cells below 100% for a week and then give them an Absorption to balance and reset the SOC to 100%.
I think your "SOC 100% reset" idea would make a very minor effect on the accuracy of SOC calculation in case of a well-balanced battery pack. But it would lead to losing a lot of opportunities to reset the SOC when the pack reaches (almost) full charge for just a short period of time. Which eventually would lead to a less accurate SOC.
@@istvantiricz296 "(almost) full charge for just a short period of time" ... that means it's not fully charged. Therefore SOC should not reset to 100%.
@@danielardelian2 Totally agree, the 100% SOC should be sent only at the end of the charging phase (logic to be determined). This is what I do with my YamBMS application, the soc remains at max 98% until the charging phase is finished, then the 100% soc can be sent.
You cant imagine how happy I am Andy! 3x JK bms + 3x Luyuan diy Box + 3 sets of MB31 on the way!! :D Feels like Christmas already in hot summer Netherlands! jahwohl! 15.30 is available for some days already from the jk site ;)
BMS does not register Amperage in/out above 0.3A and often times not until 0.5A This obviously causes serious SOC drift which is made worse with multiple packs on a bank. Within 24 hrs there can be as much as 20% drift between identical packs with identical BMS'.
We need open source code for this BMS. Im glad JK finally decided to reply to you. Although I've had multiple distributors of the bms contact them and the distributors have not gotten any responses. Makes me very hesitant to use their bms in all my installs.
There is still a very extensive list of Fixes needed - many posted into this thread without any acknowledgement. SOC is still also completely botched. The "only" person they talked to is Andy for Appeasemernt & Pacification purposes (to save face) which is exactly what this Vid is.
I have a huge amount of respect for Andy and his efforts. But like you said. It's probably not going to get JK to actually change their poor behavior. When it comes to customer support.
Correct. It won't change their overall approach towards their customers nor will they fix all the problems this BMS still has. I think JK is still the best shot we have at the moment. If anyone has a path forward or knows any alternatives to the JK BMS, I'm all for it.
@OffGridGarageAustralia I think we all got too excited when jk first released this bms. And seemed to be working with the community. But in reality. I don't know of any main BMS manufacturers that are any better. In that regards. I'm waiting patiently to see if they fix the 100% soc. As that is a make it or break it issue for me.
Thanks for your work with JK! I'm going to test the BMS with SMA (Sunny Island 6.0H-13). According to their marketing material it should work, but we'll see.
@OffGridGarageAustralia Thanks for your work Andy. Tested the 15.30 on a parallel pack setup. New features showing up in venus os. Still what i have now experienced is that the float mode does not work anymore. Its staying on high voltage forever. Am I the only one?
Superb work Andy! Loving it.❤ One thing i would love and is not yet fixed is the BMS consumption showing in the VRM which is missing data atm. Are you still working with JK on a version 15.31 where this issue and maybe more will be fixed? Im expecting an EEL standing JK case any day now. So these improvements are right on time for me!🎉🎉🎉
SOC 100% will report that Pack is FULL when only 1 cells reached set Trigger Point, For many devices like Voltronic, Victron etc, that terminate charging which is NOT Correct and other packs in Bank will also stop charging as a result. This ends Absorb/Bulk, and Float thereby effectively terminating Balancing & Levelling of cells & packs. THE FIX should be to set 100% SOC Value and trigger FLOAT once reached. Other options are possible. Another SOC 100% Error. Often the BMS will report 100% SOC even when NO CELL has reached the 100% SOC voltage as set ! This is likely a result of Bad coulomb counting and poor math within the firmware.
I thought Victron was not affected by this "100% charging-terminate" and would continue charging anyway? Are you sure that this is also the case with Victron?
@Andy. Got a V15 BMS and updated to this 15.30 sotware, from your off grid garage site. Thanks. So have communication to PC, OK. Using the blue RS485 to USB adapter. I noticed you connected to CAN on the Cerbo. Did you try connecting it to Raspberry Pi by RS485 or CAN? I have 2 problems with it. Can't get it to connect by RS485 to Raspberry Pi. (maybe need to buy a CAN Hat, if that would work?). - as that would help to diagnose what is going on with the other issue: Using the Dry 1 Trigger as battery cell under voltage, setting number 5. Trigger value 3100, Release value 3120. To turn off inverter running AirCon at night. SNADI via a timer relay to give a 4 second pulse to stop the inverter. First time, last night, it turned off about 1am, and again while i was checking it, after restarting inverter, because all cells were 3.2x. Later it turned off again. Early in the morning all cells still 3.2x so restarted the inverter again. Have had 1 cell being lower, (but not recently, after increasing float voltage to 3.325). 24v system, now at 8:30am getting 15A in, pack voltage 26.73. 72% - but SOC is approximate, as only on 2 days, and 0 cycles. Can you please try communication with raspberry Pi? I might try the Dry 2 trigger! Thanks again
@Andy. Would be great if you can test the CAN on your Raspberry Pi Hat. If it works, i will buy a Hat. I think you said JK was still working on the RS485 for Victron. ps, i changed the Dry Trigger 1 value to 3000, Release 3050, and it seems better. It did cut out my inverter again 2nd night on 3100 when cells were all 3.2x. Not sure yet what min cell voltage it actually works on.
amazing work, Andy, thank you for pushing fixes any chance JK would consider best practices from UI of PACE BMS software (grouping of the parameters, using tale current in addition to absorption timer for SOC determination, etc.)?
They have the parameters in a certain order which they think makes sense from a customer perspective. Customers have to start with the highest value first (OVP) then work their way down until OVPR. Makes kind of sense but I also would like to have a different grouping. Let's see...
I am pleased that JK is talking to Andy again. I wrote to many people and in particular Gobel Power and YIXIANG. The guys a YIXIANG were very helpful and did try to find out why JK had gone to ground. I am not sure if it was my efforts and the efforts of YIXIANG that encouraged them to take up communications with Andy again, but I am very pleased that they have done that, as are many others. It does look like they are still not dealing with the community as they are still not responding to my emails. One can only hope that this might change.
I just received 2 Yixiang DIY Battery Boxes and am very happy that a lot of the issues are solved now. Thanks for all your work. Do you know when this release wil be official available? (I know that you have a link)
I was going to send you a message shortly. This success was due to your contribution as well. I've forwarded the document you sent me a while back to the right channels. So, thank you very much for your help and assistance as well. We will soon have an import/export function for the settings. That will make our life a lot easier.
Hi Andy Another excellent, informative video. Thanks for the JK update. I do have one question. What advantage or why would you want to turn Blue tooth ON and OFF?
It's about time JK realised the resource they have with you doing real world R&D testing for them. Pity more companies don't recognise the community they sell into and the experience that exists.
Question: Has it been suggested to have the ability to export to file setings of the Master battery?, then import the saved setting into battery-2, battery-2, ect
Hello Andy, What do you think about the V15.27 firmware? My next batteries are on bard for the moment and their firmware is V15.27. Must I upgrade the V15.30 one? Thx a million.
This is fantastic news, its great that JK are now working with you again, hopefully you can get all the issues ironed out. Any chance you can get the battery box manufactures to fit Class T fuses? By the way, you now have over 94,100 subscribers, and over 15.6 million views.
Thank you for your feedback. I don't think call T will come as standard in these boxes. I quite like the breakers Gobel and Jaki are using. They can both cope with a very high current.
Hi Andy, just saw that the precharge option disappeared in the new firmware...sorry fireware ;) And one more question: I got the 200A version. In the Lifepo4 Settings the preset is now only 40A for charging and 200A for discharging. Is that just wrong or some logic to charge less than discharge? Thanks for sharing your Settings!
Thanks for the video Andy. Sorry if I missed it but it seems the JK forgetting the settings after not in use for a long time, and defaulting to very high voltage values is still not fixed in 15.30?
I bought 200A-2A version months ago, but waiting on Gobel cells (landed now) after wrong first shipment.(Redirected after wrong terminals detected). I'll buy 2 more JK now things are back on track. Thanks JK.
BMS cannot disable T3 & T4 if BMS is used in 8S Config and generates a persistent ERROR if the sensors are not present. (could be auto-config based on # of cells or with a switch.)
Interesting video as always! Just one question: What do you actually mean when you say that you have so many amps "outside"? I assume you have your panels outside and your controllers and batteries inside with amps going from outside to inside. So you should have the same amps inside then you have outside, right?
Hello Andy can you make a part 3 again of all the parameter settings and all functions of jk bms, a lot has change in the updates, just hoping you could do it again. Thanks!
I have the JK Inverter BMS installed, it gives a temperature reading for the MOS but it gives "NA" as the temperature for Battery T1 T2 T3 and T4 . I have tried disabling and re-enabling the temperature sensor via the bluetooth app.
I found a serious bug in firmware versions V15.30 (and V15.32), which concerns parallel use. The point is that the slave battery constantly falls off the inverter and at these moments the inverter changes its key parameters of limiting the charge and discharge current, the charge percentage etc. - all this is set as if we have only one battery. This does not last long, about 10 seconds, but it affects the logic of the inverter. It is as if we are constantly pulling out the cable connecting two batteries via RS485 for 10 seconds. My inverter is DEYE, but I think this is not so important. Now I have solved the problem by returning to V15.27. It is a pity that I cannot attach screenshots and photos here. I think this is related to the fix in V15.30 "Adjust the alarm mechanism in parallel mode" that you talked about earlier in another video. One thing was fixed - another was broken ((.
I really appreciate your efforts to help JK creating a good firmware for all of us. But in my oppinion double power button press should be bluetooth pairig. I want to be able to use bluetooth any time. But the BMS is still vulnerable when bluetooth is on.
Hi Andy. Great news, thanks. Unfortunately they did not solve the 2nd relay issue which I had asked them to solve. In my hardware version V15A the 2nd relay does not work. Never, not on any of the settings. Relay #1 works fine as it should. This is on all my 8 bmsses. Maybe if you were to ask them to include this fix in the next version, that would be great. I also tested V15.30, and it has not been solved. If I load V14.20 (!) on my bms with hardware version V15A, then the relay #2 works (!), but relay #1 doesn't work anymore. Anyway, the hardware of the relays seem to be fine, only the firmware isn't. Did you actually test the 2nd relay function ?? Keep up the good work, and thanks again, Mario from Netherlands
@@OffGridGarageAustralia hi Andy, thanks for your reply. Indeed, none of my 2nd relays are working. Regardless how I configure them. I tested with the system failure function, and with the overtemperature function. None work. For relay #1 everything works. The guy from JK in the support mentioned something as that early bmsses have slightly different hardware, so it would require dedicated firmware. But already for weeks now, they don't answer me anymore. They must be tired of me adking about the status every now and then. Besides that, I also found a flaw in the hardware design around the relays; sometimes also the relay #1 doesn't switch. It is due to a poor hardware design. The relays are 12V types, but they are activated only by a poor 8.7V and as the relay datasheet it requires minimum 9V to switch. So this leads to very weak switching of the relays. I have made a change in the hardware, by replacing 2 resistors that drive the opto couplers for the relays. I have also told this to JK, and probably they don't like me anymore. I made a video about it on my youtube channel @mariohoogenboom It is in dutch language, but you will get the hang of it if you are intested. It is called Zelfbouw thuisbatterij deel 5. Anyway, after the modification the relays switch very well at 10.5V, but relays #2 still do not switch at all. While if I load fw V14.20 it gets reversed; in that case relay#1 doesn't work anymore, and relay#2 works all of a sudden. But as my hardware is V15A, JK should be able to make a fw that will drive both relays properly. I just hope that they have the intention to solve this for these early V15A versions....
@@mariohoogenboom Hi mario, Can you also send this software to other members? I'm still working with the latest 15.17 and can't find the later versions.... Ps ik kom ook uit nederland😉 Thanks,
@@jeroenwiedijk2566 Hi Jeroen, JK has just informed me that this version is specific for my hardware. Appearently, I have an early V15 hardware version with a problem on the 2nd relay. JK also advises me to not update the fw in future, because this fix only exists in this fw version. Maybe you have also seen my latest video on my youtube channel that also shows a hardware flaw in the bms. Anyway, if you have the same problem, then this fw could help. If you would send your mail address to me, I will send you the fw.
Hi Andy, I've been following you for a long time. Congratulations! I have a piece of advice! I own both Seplos and JK as BMS and I think it would be useful to integrate the total voltages and consequently also the total alarms of the Seplos also in the JK! I hope you can talk to coach JK because that would be the top! I wish you a good day! See you soon! Sorry if the text is strange but I'm using the translator (I'm writing to you from Italy) and I also have a TH-cam channel. 😊
Hi Andy. Did you already tried creating 16S2P using single 200/2A inverter BMS? Each 2 parallel conected cells should have same voltage. It should be working fine especially while using exactly same cells snd save on BMS cost.
One issue for me with the Jk inverter BMS and Luxpower inverter, is the fact that once the BMS reports 100% it sends a flag to stop charging. This is with 15.27 and latest updates on the 6000xp.
@@Stefanfj The battery may display 100% but not have completed the charging phase (wrong soc). Some inverters stop charging when the battery reaches 100%. I corrected this problem in my YamBMS application, during the charging phase the soc peaks at 98% maximum. As soon as the battery is fully charged the soc 100% can be sent. So I perform a slight manipulation at the end of charging.
@@OpenSolarEnergy if the BMS sends the 100% SoC, but isn't finished charging, that's incorrect BMS behaviour. If an inverter continues to increase the voltage after getting 100% SoC from the BMS, that's incorrect inverter behaviour - it should not attempt to overcharge a lithium battery.
@@Stefanfj Yes I totally agree with you, this is bad behavior of the BMS, it should send the SOC 100% only at the end of the charging phase (logic to be determined) before switching to Float.
hi Andy From the start of the firmware 15.30 I have constantly I have excess voltage alarm and Overload L1 at least 6 times a day !!!!!! Thank you for any effort since the beginning to remind you of the V14.01 nothing to work !!!!!
Hello Andy, thanks for the great work, The history calculation is correct in version 15.30! Since I installed the version, consumption has shot up by a factor of ten in the portal? Can someone recreate this? Or am I making a mistake?
What news do you expect? I was in contact with the Seplos engineer a while back and we discussed some ideas to move forward. They wanted to discuss internally. I never heard back though, so obviously these new suggestions didn't go through the approval...
Did they also fix the heater function? In the non inverter sytle the heater doesnt turn on until it hits the low temp disconnect. Need it to turn on sooner so it doesnt disconnect.
Andy, I am trying to place an order for 2 of the JK-PB2A16S20P BMS units. But, the none of the photos from ANY seller (eBay, AliExpress Etc.) match the photos shown on your web page. Notably on your images, the inductor (Upper left) is at the very edge while every listing I see has it inset by a half inch. Also, I see on the lower left what looks like a large blue capacitor? This is also missing from EVERY BMS for sale. My question is, will I be getting the latest version or an older one?? I want to make sure that the software you provide on your site will work with these units.
Hi Andy. I need your help with the JK. My system is a 2P4S 12 volt setup. Can the JK 8S bms work on a 12 volt system and how do you connect it properly? I see you do small 4S system but I haven't found your 8S 12 volt videos.
Hi Andy, is it possible to implement the warning/protection/alarm notification also with the Solarman App? This app is used from Deye, Sofar and other big inverter manufacturers
You have to tell me if there is a message on the screen of your inverter if one battery goes OVP. Not sure how well such a message would forward to a third party app. I would expect, if the inverter shows a warning, that the Solarman app will display this as well.
Does this firmware resolve the problem when you turn the battery and BMS off for a few days and the settings all get wiped by factory reset leading to dangerous settings?
I spent the entire afternoon today working on the update to 15.30. I just couldn't get it done. The upload bar kept staying at 0, and nothing else happened. After a few hours, I discovered that the problem was that I had the firmware in my GDrive folder. Once I placed it in a local folder, it worked immediately.
@@SayWhaaaaaaaaaaaaaaaaaaaaaaat if a single cell hits RCV the BMS sends 100% signal to inverter. Basically your battery pack as a whole is never fully charged. There are also major SOC% drift issues.
@@OffGridGarageAustralia JK should send the SOC 100% only at the end of the charge phase (logic to be determined) before switching to Float, but, in the case of an unbalanced battery it should also introduce protections to prevent max_cell_v from hitting OVP... and all this should be easily and clearly configurable... This is still a lot of things to develop for JK, maybe too many things... This is what we have done in the YamBMS application.
Great work Andy, must be thousands waiting on this. Expect you told JK how much damage they are doing to their brand. BTW I tried to buy a JK BMS on EB (uk) and asked 6 suppliers what FW version number they were selling (so called new), 5 out of 6 no reply, 1 wanted to know my order number - so that tells you there may well be many units floating in the market that might not update or even become bricked. Of course you dont get any customer response with Aliex - just gimme your money. So I dont know how I will be able to buy a genuine latest model?
Ok, now, is the JK bms the ONE to use, or is there a better one? Why? I’m ordering 48 cells, for 3-sets of 304+ aH battery bank. Obviously I need the most flexible BMS, for this application. Your advise?
How about the last bullet point in the release notes? Where you able to test this too already? "7.Added the ability to count discharge energy and charge energy." Maybe it makes the graphs and data in the VRM portal a bit closer to reality 😅 as it is currently not even close (have not updated to .30 yet and using the system parallel to grid, only ACin connected yet)
Can the bad current readings be fixed by a software update, or is that a hardware issue? In my system the JK BMS controls the charging voltages of the entire Victron equipments, but I still use a SmartShunt to keep track of the SOC and see the power/current draw off the battery. I tried calibrating the current readout of my Inverter BMS multiple times, but it never shows anything even remotely accurate at all. My SmartShunt can show 80% while the JK shows 50% or something. If there is a proper way to calibrate that, I would be interested to know, but I seem to understand this is a common issue.
good, but how about those who have V 14 ? its full of bugs not working good and no future update, no promised comunication protocol, when i iask JK to replace my "not working" 14 they say no.. really good company
ANDY can you pls summarise a list of HW ver Nos to avoid. Ive lost track and over in diy solar power there have been some horrendous stories of bricking and countless hours of frustration, no response from JK etc when trying to perform FW updates.
It's great to see this happening... Now they need to create a way to change lost passwords... Maybe they give the backdoor then have you load an update to eliminate that backdoor while instituting a way to go to their site and change it after that.
Thank you for communicating with JK and helping users to resolvd issues. But I have not had a good experience with JK. My Growatt inverter does not communicate correctly with JK bms. Inverter is SPH4000 and communicates over CAN. I found the reason and then contacted JK support and informed them what the reason was. Reason is that JK sends more messages in one second and the inverter can't correctly receive messages. Issue is not with bitrate but how many millisec passes between two groups of messages. I make one interface with ESP32 (like CAN bridge) and this bridge receives chaotic messages from JK and then sends to inverter 2 a group of messages in one second and the inverter communicates with BMS. That is not a good solution for me (I must use an additional interface). Please, can You mediate with JK to resolvd my issue?
I would like to set up a battery bank for a sailboat. I am really confused as to what BMS to buy. Putting together 12 pcs of 304 AH 3.2-volt cells in a 12-volt system. Can you recommend a BMS size and which one would you recommend. thanks for your help
@andy: What about the 4S-8S BMS from JK (e.g. the B2A8S20P)? Will they also be fixed? e.g. a Bluetooth switch and the fix for the password security gap would be really great.
I am using this JK BMS in 8S (24V) mode. If I connect only 2 balancer cable which are sufficient for 8s batteries I get a temperature sensor fault. I would love to have also a fix that I am not force to use all 4 temperature sensor and balancer cables which seem not necessary. Andy can you please have also a look on this when chatting which the developers !? Thank you anyway for your great work here.
Great work Andy! Please let JK put all your default settings under the lifepo4 button. Safe everybody a lot of time
Thank you. JK will have an import/export function soon, so it will be very easy to import "Andy's JK Default' 😉
@@OffGridGarageAustralia Nice! Andy's default, I like it!😎
@@OffGridGarageAustralia Nice. They should include these profiles with the app so that it would be simple even for newbies to select Andy's LFP defaults. :)
@@OffGridGarageAustraliamaybe they add Andy-button?
@@OffGridGarageAustralia pin 1 is B pin 2 is A for RS 485. But it does not communicate. Can you please upload a video to show how we can establish communication between solax and jk inverter bms.
JK got lucky to have FREE R&D team such like you.
This is and has been the normal for most of the electronics industry worldwide for many decades now.. Consumers are the mass beta testers..
I'm happy to do it if we all benefit from the outcome.
Andy,
There are 2 major issues which need fixing.
1. Cell voltage jumping issue. Where cell voltage is erratic when used with inverter.
2. Soc 100% issue. This setting is ruined in inverter Bms. It used to work well in older black model.
Soc has become very inaccurate now.
I have emailed you with videos & proofs. Pls check.
Also JK does not reply to me, which is concerning.
We group of 50 members facing the same issues please help us by reporting these issues to jk software team
You and a couple other battery, solar, BMS Ytubers are.... and have been at the forefront for bringing the quality of these products UP to an amazing level so that everyone in the world can benefit from you're work. Industry changing really...
Something to be proud of for sure!
Thank you for all you do Andy. (Almost up to 100k!) and for good reason... 🤘
Thank you, Andy, For all your work and the brilliant videos. It makes it so much easier for all of us to choose the right products. Just received 2x EEL battery vertical housing (with JK-PB2A16S20P), 2x “Peter Board” + 32 Gobel Power MB31's and lot's of Victron equipment. All based on the info from your videos. Thank you so much!!
hi there, where did you buy the peter boards from? i cant seem to find them!
Well done Jikong, Andy, and mostly this community!!!
Andy, you made my day! Danke daß Du so hartnäckig drangeblieben bist!🎉
Iss doch klar!
Thanks Andy, What a great result and you mentioned in the comments "JK will have an import/export function soon" It just keep getting better 👍
Great work Andy getting JK to engage with you again. A feature I'd like to see is the ability to save configurations to an external file, and then upload configurations from an external file. So that you can have your config backed up, as well as making setting up multiple batteries much faster in the configure one, then apply to all others approach. Take care D
It is already approved and the backups will implement it
RCV Time Bug in V15.30
Hi Andy, thank you for your great support and the results you can achieve with JK.
I have found a major bug in the current firmware version.
The BMS no longer applies the RCV time parameter. After the RCV time has expired, the BMS does not switch to the RFV cell voltage. Accordingly, the charging voltage (CVL) in the GX device remains set to 55.2 V throughout the day (RCVx16). This means that my 2 batteries are charged at 55.2 V for approx. 7 hours a day. Andi, you may not have enough amps outside to be able to check this. Can someone from the community check in the VRM portal whether my observation can be confirmed?
I have experienced the same!
I created a small flow in Node Red to emulate the correct behavior as a workaround to set DVCC max volt
I have The same Bug :(
@OffGridGarageAustralia Hi Andy, the RCV time bug is confirmed. Can you please add this issue to your list of requirements for JK?
Hello,
I can confirm that. There are still enough amps out there in Germany.😎
After the update to V15.30 everything is going well so far.
But now I have the same problem that the float mode no longer works.
Excellent, awaiting the V14.30 update patiently
ja! ja! ja! ja! sag niemals neeeeeey! Weihnachten und Ostern können also doch auf einen Tag fallen! 🎉🎉🎉
Thank you for your effort, and Thank you JK for listening to us!
Thank you.
yaaaaayyyyy! we really had an impact! thanks a lot Andy for the voice of the community!! 🎉🎉🎉😁😁
My pleasure!!
Wonderful. I have 5 of the v14s and am awaiting the new firmware.
Yes, me too😄
Fantastic work Andy!!, thanks also to JK for a listening ear and direct approach.
Thank you very much for the firmware Andy. Just to let you know that we can still reach DIY Eve batteries with JK with 15KW under 1650 Euros in Europe.
15kWh for 1650€? Wow!
Could you share your experiences on which seller/platform might be the cheapest/best for Europe?
@@leumel900 ще дешевше, 1200 евро за 16кВт, купуй на НКОН як не резидент Европи, наприклад шо ти з України.
@@leumel900 i recently had a quote of 1750 euro for eve mb31 , jk bms, QSO battery box, wheels and the optional long thicker cables.
100% soc charging cut out is a big issue for the AIO inverters.
Intrested to see how this is addressed in the next video.
Also, i would really like to see. The heater control logic with its own set points.
Right now, it will turn on at charge UTP and of at charge UTPR. Which results in a constant cycling. Between charging and heating.
Andy to be fair JK is only talking to you and not their customers. This is causing community concern in the forums because they aren't communicating to anyone else. Did they shed any light on their behavior? It's really causing people to second guess further purchases.
Yes, I know, I flagged this with the management but haven't heard back how they want to address that.
@@OffGridGarageAustraliaThank you, we all appreciate the time you've spent on this.
@@OffGridGarageAustralia
Maybe that's also a good thing, if everyone is shouting you can't hear anything.....
If JK had a better documentation and download section (in English!) on their webside, it would solve 99% of all issues / questions the customers have.
Fantastic Andy and community!! This is giving me the incentive to keep buying. Love the part where the battery ID is shown when using multiples. Awesome Andy all 👍
Well done, great result. As a recent convert to JK I do have one observation that it would be nice to address: Most programable BMS have a pack over voltage disconnect as well as a cell over voltage disconnect the JK doesn't seem to have this and everything is done on a cell voltage basis. As I often use the frankenstein approach due to my source of cells this can be a problem. I would normally have a pack charge disconnect of 3.5vpc (56v) and a cell over voltage disconnect of 3.65vpc this gives best balancing performance as it enables the pack to continue charging while the high cell(s) is / are being brought down. If the cell over voltage is set to 3.5v this causes a pack charge disconnect while the other cells may be in a relatively low state of charge and the balancing at this level doesn't last long before the 3.5v cell is down with the others however it is still well out of balance with the result that it never really comes back into balance. This is the situation with the JK BMS and i have to set the cell disconnect voltage a lot higher than 3.5v to get good balancing yet, when balanced, I want to keep it at a pack disconnect of 56v which means I have to constantly change the settings. As this is for propulsion packs on boats they can spend some time at a full level and i prefer this to be 56v rather than around 58v. So, in summary, I think it would be good to have a pack disconnect independent of cell over voltage disconnect. This would then also make it suitable for use in hybrid systems which have an increasing following for those retrofitting lfp to boats with lead acid charging equipment and where the balancing effort is important due to the limited time in normal use that it is available for.
JK-inverter-BMS issues that have been discussed on the channel in the past:
1. "SOC 100% reset" - it resets when the highest cell reaches a specified voltage - not very good.
One idea was to reset when Absorption ends.
Another idea was to add a Tail Current setting like the Victron SmartShunt.
Another idea was to reset when ALL cells are above a specified voltage (not just the highest).
2. Can you set the Float timer to a very long duration (7 days, 168 hours)?
Keep the cells below 100% for a week and then give them an Absorption to balance and reset the SOC to 100%.
I think your "SOC 100% reset" idea would make a very minor effect on the accuracy of SOC calculation in case of a well-balanced battery pack. But it would lead to losing a lot of opportunities to reset the SOC when the pack reaches (almost) full charge for just a short period of time. Which eventually would lead to a less accurate SOC.
@@istvantiricz296 "(almost) full charge for just a short period of time" ... that means it's not fully charged. Therefore SOC should not reset to 100%.
@@danielardelian2 Totally agree, the 100% SOC should be sent only at the end of the charging phase (logic to be determined). This is what I do with my YamBMS application, the soc remains at max 98% until the charging phase is finished, then the 100% soc can be sent.
You cant imagine how happy I am Andy! 3x JK bms + 3x Luyuan diy Box + 3 sets of MB31 on the way!! :D Feels like Christmas already in hot summer Netherlands! jahwohl! 15.30 is available for some days already from the jk site ;)
Hello landgenoot :)
@@firefly2472ook al!😂
Hier in Leeuwarden ook aan de klus met 16 MB31 cellen 😊
Groetjes uit Den Haag.. ook 16 celletjes en een Multiplus 5000
De grap is die 280 cellen passen exact in een Ikea kastje 😂
Hello from hoofddorp, 16 cells 280ah. Victron multiplus-ii 5000.😅
BMS does not register Amperage in/out above 0.3A and often times not until 0.5A This obviously causes serious SOC drift which is made worse with multiple packs on a bank. Within 24 hrs there can be as much as 20% drift between identical packs with identical BMS'.
15.30 has a RCV/RFV bug - RFV ist not set after timer expired in victron system. Batteries are kept at RCV-level only. :(
Thank you Andy. I ordered and waiting for the JK inverter bms 2A200A version.
Thanks for the update sir👍
But SoC issue is still present.. please help us with that also 🙏
Coming in the next video...
@@OffGridGarageAustralia thanks 👍
We need open source code for this BMS.
Im glad JK finally decided to reply to you. Although I've had multiple distributors of the bms contact them and the distributors have not gotten any responses.
Makes me very hesitant to use their bms in all my installs.
There is still a very extensive list of Fixes needed - many posted into this thread without any acknowledgement. SOC is still also completely botched.
The "only" person they talked to is Andy for Appeasemernt & Pacification purposes (to save face) which is exactly what this Vid is.
I have a huge amount of respect for Andy and his efforts. But like you said. It's probably not going to get JK to actually change their poor behavior. When it comes to customer support.
Correct. It won't change their overall approach towards their customers nor will they fix all the problems this BMS still has. I think JK is still the best shot we have at the moment.
If anyone has a path forward or knows any alternatives to the JK BMS, I'm all for it.
@OffGridGarageAustralia
I think we all got too excited when jk first released this bms.
And seemed to be working with the community.
But in reality. I don't know of any main BMS manufacturers that are any better. In that regards.
I'm waiting patiently to see if they fix the 100% soc.
As that is a make it or break it issue for me.
@@SunInLithium are suggesting that JK BMS is premium level?
Best wishes from Hamburg, Germany. Well done. Great job delivered with the community tackling the issues. 😂❤❤❤❤
Perfekt vielen Dank für dein Einsatz
Bau mit JK „Das BMS“!!!
Thanks, Paul.
When will the SOC issue be addressed? Thank you in advance
Yea! SOC issue solving requires a lot HW modifications, I think.
I'll have this in my next video.
Andy, is it possible that JK ads the Cell Voltages from all Batteries in the Victron VRM Console like SerielBattery?
Great work andy! Nice to see JK is wanting to work with you again. Keep it up!
Thanks for your work with JK! I'm going to test the BMS with SMA (Sunny Island 6.0H-13). According to their marketing material it should work, but we'll see.
thanks Andy you are absolutely brilliant
@OffGridGarageAustralia
Thanks for your work Andy.
Tested the 15.30 on a parallel pack setup. New features showing up in venus os. Still what i have now experienced is that the float mode does not work anymore. Its staying on high voltage forever. Am I the only one?
Superb work Andy! Loving it.❤
One thing i would love and is not yet fixed is the BMS consumption showing in the VRM which is missing data atm. Are you still working with JK on a version 15.31 where this issue and maybe more will be fixed?
Im expecting an EEL standing JK case any day now. So these improvements are right on time for me!🎉🎉🎉
Great work. Just orderd a Jk bms , lets see if it matches my main requierement. Set and Forget
SOC 100% will report that Pack is FULL when only 1 cells reached set Trigger Point, For many devices like Voltronic, Victron etc, that terminate charging which is NOT Correct and other packs in Bank will also stop charging as a result. This ends Absorb/Bulk, and Float thereby effectively terminating Balancing & Levelling of cells & packs. THE FIX should be to set 100% SOC Value and trigger FLOAT once reached. Other options are possible.
Another SOC 100% Error. Often the BMS will report 100% SOC even when NO CELL has reached the 100% SOC voltage as set ! This is likely a result of Bad coulomb counting and poor math within the firmware.
I thought Victron was not affected by this "100% charging-terminate" and would continue charging anyway? Are you sure that this is also the case with Victron?
DEYE/Sunsynk still uses a Force Request Charge to charge from GRID. Parameters are not settable on BMS. Protocol Implementation is incomplete.
And Victron also uses a can id for forced charging, I implemented it in YamBMS for Victron, PYLON and LuxPower.
@Andy. Got a V15 BMS and updated to this 15.30 sotware, from your off grid garage site. Thanks. So have communication to PC, OK. Using the blue RS485 to USB adapter. I noticed you connected to CAN on the Cerbo. Did you try connecting it to Raspberry Pi by RS485 or CAN? I have 2 problems with it. Can't get it to connect by RS485 to Raspberry Pi. (maybe need to buy a CAN Hat, if that would work?). - as that would help to diagnose what is going on with the other issue: Using the Dry 1 Trigger as battery cell under voltage, setting number 5. Trigger value 3100, Release value 3120. To turn off inverter running AirCon at night. SNADI via a timer relay to give a 4 second pulse to stop the inverter. First time, last night, it turned off about 1am, and again while i was checking it, after restarting inverter, because all cells were 3.2x. Later it turned off again. Early in the morning all cells still 3.2x so restarted the inverter again. Have had 1 cell being lower, (but not recently, after increasing float voltage to 3.325). 24v system, now at 8:30am getting 15A in, pack voltage 26.73. 72% - but SOC is approximate, as only on 2 days, and 0 cycles. Can you please try communication with raspberry Pi? I might try the Dry 2 trigger! Thanks again
what is setting Dry ARM intermittent? it is default OFF
Had a persistent Temp Sensor Abnormal warning, since connection, using just 8S balance wiring. Added the 2 other sets of wires, OK now.
@Andy. Would be great if you can test the CAN on your Raspberry Pi Hat. If it works, i will buy a Hat. I think you said JK was still working on the RS485 for Victron. ps, i changed the Dry Trigger 1 value to 3000, Release 3050, and it seems better. It did cut out my inverter again 2nd night on 3100 when cells were all 3.2x. Not sure yet what min cell voltage it actually works on.
amazing work, Andy, thank you for pushing fixes
any chance JK would consider best practices from UI of PACE BMS software (grouping of the parameters, using tale current in addition to absorption timer for SOC determination, etc.)?
They have the parameters in a certain order which they think makes sense from a customer perspective. Customers have to start with the highest value first (OVP) then work their way down until OVPR. Makes kind of sense but I also would like to have a different grouping. Let's see...
I am pleased that JK is talking to Andy again.
I wrote to many people and in particular Gobel Power and YIXIANG.
The guys a YIXIANG were very helpful and did try to find out why JK had gone to ground.
I am not sure if it was my efforts and the efforts of YIXIANG that encouraged them to take up communications with Andy again, but I am very pleased that they have done that, as are many others.
It does look like they are still not dealing with the community as they are still not responding to my emails. One can only hope that this might change.
Thank you Andy for your work with JK
I just received 2 Yixiang DIY Battery Boxes and am very happy that a lot of the issues are solved now. Thanks for all your work. Do you know when this release wil be official available? (I know that you have a link)
Can they implement your prefered LFP settings as a default? That would be amazing ;)
Thanks for all the effort and improvements! So great!!!
I was going to send you a message shortly. This success was due to your contribution as well. I've forwarded the document you sent me a while back to the right channels.
So, thank you very much for your help and assistance as well.
We will soon have an import/export function for the settings. That will make our life a lot easier.
@@OffGridGarageAustralia Amazing! I'm just glad that you have to power to move them into the right direction ☺
Hi Andy Another excellent, informative video. Thanks for the JK update. I do have one question. What advantage or why would you want to turn Blue tooth ON and OFF?
That's excellent news Andy. The Bluetooth fix is 👌
I'd also like to know if the fixes are working for SMA inverters.
It's about time JK realised the resource they have with you doing real world R&D testing for them. Pity more companies don't recognise the community they sell into and the experience that exists.
Question: Has it been suggested to have the ability to export to file setings of the Master battery?, then import the saved setting into battery-2, battery-2, ect
Heya, so nice you have a contact with JK again and so good to see JK inplomented all the idees from the form
Hello Andy,
What do you think about the V15.27 firmware?
My next batteries are on bard for the moment and their firmware is V15.27.
Must I upgrade the V15.30 one?
Thx a million.
This is fantastic news, its great that JK are now working with you again, hopefully you can get all the issues ironed out. Any chance you can get the battery box manufactures to fit Class T fuses? By the way, you now have over 94,100 subscribers, and over 15.6 million views.
Thank you for your feedback. I don't think call T will come as standard in these boxes. I quite like the breakers Gobel and Jaki are using. They can both cope with a very high current.
The question is, can these brakes disrupt the current even if there is a huge spark? Class-T has sand inside which fills the gab between the contacts.
Great work but I think with Non-Inverter type JK - BMS still have the issue . Right ?
Hi Andy, just saw that the precharge option disappeared in the new firmware...sorry fireware ;) And one more question: I got the 200A version. In the Lifepo4 Settings the preset is now only 40A for charging and 200A for discharging. Is that just wrong or some logic to charge less than discharge? Thanks for sharing your Settings!
Thanks for the video Andy. Sorry if I missed it but it seems the JK forgetting the settings after not in use for a long time, and defaulting to very high voltage values is still not fixed in 15.30?
I bought 200A-2A version months ago, but waiting on Gobel cells (landed now) after wrong first shipment.(Redirected after wrong terminals detected). I'll buy 2 more JK now things are back on track. Thanks JK.
BMS cannot disable T3 & T4 if BMS is used in 8S Config and generates a persistent ERROR if the sensors are not present.
(could be auto-config based on # of cells or with a switch.)
That's great! Keep moving forward. One issue at at time. Goed bezig man!
Interesting video as always! Just one question: What do you actually mean when you say that you have so many amps "outside"? I assume you have your panels outside and your controllers and batteries inside with amps going from outside to inside. So you should have the same amps inside then you have outside, right?
Hello Andy can you make a part 3 again of all the parameter settings and all functions of jk bms, a lot has change in the updates, just hoping you could do it again. Thanks!
94.1k moving forward good job. 😊
We are getting close!
I have the JK Inverter BMS installed, it gives a temperature reading for the MOS but it gives "NA" as the temperature for Battery T1 T2 T3 and T4 . I have tried disabling and re-enabling the temperature sensor via the bluetooth app.
I found a serious bug in firmware versions V15.30 (and V15.32), which concerns parallel use. The point is that the slave battery constantly falls off the inverter and at these moments the inverter changes its key parameters of limiting the charge and discharge current, the charge percentage etc. - all this is set as if we have only one battery. This does not last long, about 10 seconds, but it affects the logic of the inverter. It is as if we are constantly pulling out the cable connecting two batteries via RS485 for 10 seconds. My inverter is DEYE, but I think this is not so important. Now I have solved the problem by returning to V15.27. It is a pity that I cannot attach screenshots and photos here.
I think this is related to the fix in V15.30 "Adjust the alarm mechanism in parallel mode" that you talked about earlier in another video. One thing was fixed - another was broken ((.
I really appreciate your efforts to help JK creating a good firmware for all of us. But in my oppinion double power button press should be bluetooth pairig. I want to be able to use bluetooth any time. But the BMS is still vulnerable when bluetooth is on.
Pairing is automatically when connecting via Bluetooth. I understand what you mean though. Let me pitch that idea to them...
Hi Andy. Great news, thanks. Unfortunately they did not solve the 2nd relay issue which I had asked them to solve. In my hardware version V15A the 2nd relay does not work. Never, not on any of the settings. Relay #1 works fine as it should.
This is on all my 8 bmsses.
Maybe if you were to ask them to include this fix in the next version, that would be great.
I also tested V15.30, and it has not been solved. If I load V14.20 (!) on my bms with hardware version V15A, then the relay #2 works (!), but relay #1 doesn't work anymore. Anyway, the hardware of the relays seem to be fine, only the firmware isn't.
Did you actually test the 2nd relay function ??
Keep up the good work, and thanks again,
Mario from Netherlands
Hi Mario, yes, I tested 3 of my V15 BMS and both relays are working.
Are yours not working at all, so regardless if OVP, OT or SOC used?
@@OffGridGarageAustralia hi Andy, thanks for your reply. Indeed, none of my 2nd relays are working. Regardless how I configure them. I tested with the system failure function, and with the overtemperature function. None work. For relay #1 everything works.
The guy from JK in the support mentioned something as that early bmsses have slightly different hardware, so it would require dedicated firmware. But already for weeks now, they don't answer me anymore. They must be tired of me adking about the status every now and then.
Besides that, I also found a flaw in the hardware design around the relays; sometimes also the relay #1 doesn't switch. It is due to a poor hardware design. The relays are 12V types, but they are activated only by a poor 8.7V and as the relay datasheet it requires minimum 9V to switch. So this leads to very weak switching of the relays. I have made a change in the hardware, by replacing 2 resistors that drive the opto couplers for the relays. I have also told this to JK, and probably they don't like me anymore.
I made a video about it on my youtube channel @mariohoogenboom
It is in dutch language, but you will get the hang of it if you are intested. It is called Zelfbouw thuisbatterij deel 5.
Anyway, after the modification the relays switch very well at 10.5V, but relays #2 still do not switch at all. While if I load fw V14.20 it gets reversed; in that case relay#1 doesn't work anymore, and relay#2 works all of a sudden.
But as my hardware is V15A, JK should be able to make a fw that will drive both relays properly. I just hope that they have the intention to solve this for these early V15A versions....
Hello Andy
Great news from my side for a change ! JK has sent me new FW V15.32 that solved the 2nd relay issue on my 8 bmsses. Problem solved !
@@mariohoogenboom
Hi mario,
Can you also send this software to other members?
I'm still working with the latest 15.17 and can't find the later versions....
Ps ik kom ook uit nederland😉
Thanks,
@@jeroenwiedijk2566 Hi Jeroen, JK has just informed me that this version is specific for my hardware. Appearently, I have an early V15 hardware version with a problem on the 2nd relay. JK also advises me to not update the fw in future, because this fix only exists in this fw version. Maybe you have also seen my latest video on my youtube channel that also shows a hardware flaw in the bms. Anyway, if you have the same problem, then this fw could help. If you would send your mail address to me, I will send you the fw.
Hi Andy, I've been following you for a long time. Congratulations! I have a piece of advice! I own both Seplos and JK as BMS and I think it would be useful to integrate the total voltages and consequently also the total alarms of the Seplos also in the JK!
I hope you can talk to coach JK because that would be the top! I wish you a good day! See you soon! Sorry if the text is strange but I'm using the translator (I'm writing to you from Italy) and I also have a TH-cam channel. 😊
Hey JK, thanks for the great work with Andy. Not really his fault that he is German.
Hahaha, great!
Hi. What is about the feature of save/restore settings. Is there a plan this feature will include into the pc software or app?
It's in the make...
Hi Andy. Did you already tried creating 16S2P using single 200/2A inverter BMS? Each 2 parallel conected cells should have same voltage. It should be working fine especially while using exactly same cells snd save on BMS cost.
One issue for me with the Jk inverter BMS and Luxpower inverter, is the fact that once the BMS reports 100% it sends a flag to stop charging. This is with 15.27 and latest updates on the 6000xp.
Isn't that exactly what should happen, though? if the battery is full then you shouldn't be charging anymore?
@@Stefanfj The battery may display 100% but not have completed the charging phase (wrong soc). Some inverters stop charging when the battery reaches 100%. I corrected this problem in my YamBMS application, during the charging phase the soc peaks at 98% maximum. As soon as the battery is fully charged the soc 100% can be sent. So I perform a slight manipulation at the end of charging.
@@OpenSolarEnergy if the BMS sends the 100% SoC, but isn't finished charging, that's incorrect BMS behaviour.
If an inverter continues to increase the voltage after getting 100% SoC from the BMS, that's incorrect inverter behaviour - it should not attempt to overcharge a lithium battery.
@@Stefanfj Yes I totally agree with you, this is bad behavior of the BMS, it should send the SOC 100% only at the end of the charging phase (logic to be determined) before switching to Float.
hi Andy From the start of the firmware 15.30 I have constantly I have excess voltage alarm and Overload L1 at least 6 times a day !!!!!! Thank you for any effort since the beginning to remind you of the V14.01 nothing to work !!!!!
Hello Andy, thanks for the great work,
The history calculation is correct in version 15.30! Since I installed the version, consumption has shot up by a factor of ten in the portal? Can someone recreate this? Or am I making a mistake?
Hello Andy. Nice news, but what about news for the Seplos 3.0 BMS?
What news do you expect?
I was in contact with the Seplos engineer a while back and we discussed some ideas to move forward. They wanted to discuss internally. I never heard back though, so obviously these new suggestions didn't go through the approval...
Did they also fix the heater function? In the non inverter sytle the heater doesnt turn on until it hits the low temp disconnect. Need it to turn on sooner so it doesnt disconnect.
Andy, I am trying to place an order for 2 of the JK-PB2A16S20P BMS units. But, the none of the photos from ANY seller (eBay, AliExpress Etc.) match the photos shown on your web page. Notably on your images, the inductor (Upper left) is at the very edge while every listing I see has it inset by a half inch. Also, I see on the lower left what looks like a large blue capacitor? This is also missing from EVERY BMS for sale. My question is, will I be getting the latest version or an older one?? I want to make sure that the software you provide on your site will work with these units.
Hi Andy.
I need your help with the JK.
My system is a 2P4S 12 volt setup.
Can the JK 8S bms work on a 12 volt system and how do you connect it properly?
I see you do small 4S system but I haven't found your 8S 12 volt videos.
Hello Andy , I have JK BMS Version 15.26 with a Growatt inverter, is it worth update to vers15.30?
Do you have a good email for JK? Ive been trying to troubleshoot my can comms to my inverter.
Hi Andy, is it possible to implement the warning/protection/alarm notification also with the Solarman App?
This app is used from Deye, Sofar and other big inverter manufacturers
You have to tell me if there is a message on the screen of your inverter if one battery goes OVP. Not sure how well such a message would forward to a third party app. I would expect, if the inverter shows a warning, that the Solarman app will display this as well.
Does this firmware resolve the problem when you turn the battery and BMS off for a few days and the settings all get wiped by factory reset leading to dangerous settings?
I spent the entire afternoon today working on the update to 15.30. I just couldn't get it done. The upload bar kept staying at 0, and nothing else happened. After a few hours, I discovered that the problem was that I had the firmware in my GDrive folder. Once I placed it in a local folder, it worked immediately.
Heard the 100% SOC issue is not addressed yet. Frustrating.
what is the issue if you can tell?
I'll address this in the next video.
@@SayWhaaaaaaaaaaaaaaaaaaaaaaat if a single cell hits RCV the BMS sends 100% signal to inverter. Basically your battery pack as a whole is never fully charged. There are also major SOC% drift issues.
@@OffGridGarageAustralia JK should send the SOC 100% only at the end of the charge phase (logic to be determined) before switching to Float, but, in the case of an unbalanced battery it should also introduce protections to prevent max_cell_v from hitting OVP... and all this should be easily and clearly configurable... This is still a lot of things to develop for JK, maybe too many things... This is what we have done in the YamBMS application.
@@OffGridGarageAustralia you did not address the known 100% SOC issue in your latest video. You only talked about drift.
Great work Andy, must be thousands waiting on this. Expect you told JK how much damage they are doing to their brand. BTW I tried to buy a JK BMS on EB (uk) and asked 6 suppliers what FW version number they were selling (so called new), 5 out of 6 no reply, 1 wanted to know my order number - so that tells you there may well be many units floating in the market that might not update or even become bricked. Of course you dont get any customer response with Aliex - just gimme your money. So I dont know how I will be able to buy a genuine latest model?
Ok, now, is the JK bms the ONE to use, or is there a better one? Why? I’m ordering 48 cells, for 3-sets of 304+ aH battery bank. Obviously I need the most flexible BMS, for this application. Your advise?
At this point, the JK Inverter BMS is the best you can get.
In this price range, it is the best you can get in my opinion.
How about the last bullet point in the release notes? Where you able to test this too already?
"7.Added the ability to count discharge energy and charge energy."
Maybe it makes the graphs and data in the VRM portal a bit closer to reality 😅 as it is currently not even close (have not updated to .30 yet and using the system parallel to grid, only ACin connected yet)
I will address the SOC problem in the next video.
@@OffGridGarageAustralia Thank you very much. Your time and efforts are really appreciated!!
Hi Andy. Advise whether it would be better to buy a Seplos 3.0 box for $600 or a Gobel pc200 for $900. Thank you.
Can the bad current readings be fixed by a software update, or is that a hardware issue? In my system the JK BMS controls the charging voltages of the entire Victron equipments, but I still use a SmartShunt to keep track of the SOC and see the power/current draw off the battery. I tried calibrating the current readout of my Inverter BMS multiple times, but it never shows anything even remotely accurate at all. My SmartShunt can show 80% while the JK shows 50% or something. If there is a proper way to calibrate that, I would be interested to know, but I seem to understand this is a common issue.
I'll discuss this in the next video.
@@OffGridGarageAustralia Looking forward to it! Thanks Andy for the great work you've been doing!
Vielen Dank für deine Arbeit!
Thank you very much!
good, but how about those who have V 14 ? its full of bugs not working good and no future update, no promised comunication protocol, when i iask JK to replace my "not working" 14 they say no.. really good company
Does it make a difference, which firmware version my JK-PB had before? Or can i directly flash the v15.30 ignoring anything that was there before?
ANDY can you pls summarise a list of HW ver Nos to avoid. Ive lost track and over in diy solar power there have been some horrendous stories of bricking and countless hours of frustration, no response from JK etc when trying to perform FW updates.
Did they fix consumption statistics in Victron VRM? You made whole video about it two months ago.
It's great to see this happening... Now they need to create a way to change lost passwords... Maybe they give the backdoor then have you load an update to eliminate that backdoor while instituting a way to go to their site and change it after that.
Hey Andy, when are they going to implement more cam and rs232 inverter communication?
Thank you for communicating with JK and helping users to resolvd issues. But I have not had a good experience with JK. My Growatt inverter does not communicate correctly with JK bms. Inverter is SPH4000 and communicates over CAN. I found the reason and then contacted JK support and informed them what the reason was. Reason is that JK sends more messages in one second and the inverter can't correctly receive messages. Issue is not with bitrate but how many millisec passes between two groups of messages. I make one interface with ESP32 (like CAN bridge) and this bridge receives chaotic messages from JK and then sends to inverter 2 a group of messages in one second and the inverter communicates with BMS. That is not a good solution for me (I must use an additional interface). Please, can You mediate with JK to resolvd my issue?
I will forward this to JK.
What model BMS and fw are you running?
@@OffGridGarageAustralia PB1A16S10P V15. Thank You!
hello , It is possible to put a 4.3 Touch Display in the BMS model JK-B2A20S20P ?
I would like to set up a battery bank for a sailboat. I am really confused as to what BMS to buy. Putting together 12 pcs of 304 AH 3.2-volt cells in a 12-volt system. Can you recommend a BMS size and which one would you recommend. thanks for your help
is it possibile to enter the jkbms on android app without entering location?
@andy: What about the 4S-8S BMS from JK (e.g. the B2A8S20P)? Will they also be fixed? e.g. a Bluetooth switch and the fix for the password security gap would be really great.
I am using this JK BMS in 8S (24V) mode. If I connect only 2 balancer cable which are sufficient for 8s batteries I get a temperature sensor fault. I would love to have also a fix that I am not force to use all 4 temperature sensor and balancer cables which seem not necessary. Andy can you please have also a look on this when chatting which the developers !?
Thank you anyway for your great work here.