Two things are incredible: 1) the swarm intelligence consolidated on Andy's platform to disclose such dramatic issues and 2) Andy's additional talent as entertainer.
Please update a new version: V14.16 Upgrade logs 1.Fixed a bug that could be lost if parameters were lost. The bug is caused by a logical error in the parameter entered by the user. 2.Change the default configuration parameters to lithium iron to improve security. 2.Optimized JKBMS Modbus protocol, added RCV RFV register support. The protocol must use the PC software version V2.5.0。 3.Fixed the Bug that the hardware version may be incorrect in the device information. 4.Add battery low temperature alarm to dry triggers.
Impressive, but as a broadcast engineer, I'd have to say the shots where the camera switches back from Andy to Andy3 in the sit-down interview... The camera is on the wrong side. The camera should be on the same side of the room, the same side of the interviewer and their subject, e.g. right of interviewer and left of their subject. If you put the camera angles as he did, we call it "crossing the line".
The battery type should be a jumper pin or dip switch on the board so there is a physical hardware element to the chemistry profile it uses in my opinion.
-V14.17 Upgrade logs 1.Fixed a bug where parameters were lost after BMS restart. The bug is caused by a logical error in the parameter entered by the user. 2.Change the default configuration parameters to LPF to improve security. 2.Optimized JKBMS Modbus protocol, added RCV RFV register support. The protocol must use the PC software version V2.5.0。 3.Fixed the Bug that the hardware version may be incorrect in the device information. 4.Add battery low temperature alarm to dry triggers. -@2024-01-09 by JKBMS
As much as this sucks for JK and their customers, this channel is a major benefit to all. Without this network of communication, development and safety would take much longer to resolve.
Does recommending what is now a unsafe product make you potentially liable. If the BMS defaults back to original settings and a fire causes loss of property and injury? You're probably thinking ridiculous but think about it! You are basically a BATA tester for JK you receive products for free test them and suggest software changes to JK through email. God forbid if something did happen and people were injured I think in the investigation your name would pop up! Then on the other hand JK may sue you for misrepresent their product now that everyone is jumping on the Andy bandwagon and saying across the internet all JK BMS are unsafe and faulty! As I tried to explain to the mermaid 🙄 you are not showing people how to bake a cake! You may need that suit! I do worry for you all!
Great video - hat's off to the Community member/s who bought this to Andy's attention and allowing confirmation and comms by Andy to wider audience. Some thing for all of us to be mindful of when directly purchasing/imported product ourselves. Thanks for the extra work put into the entertaining intro Andy. Cheers Greg
JK fixed it! Update available on the website tomorrow. AND - default setting will be LFP ! From my view a very quick fix and good customer service. I don't know any other BMS supplier getting customer feedback and bugs addressed that quick.
JK note on their Website for the change: 1.Fixed a bug that could be lost if parameters were lost. The bug is caused by a logical error in the parameter entered by the user. 2.Change the default configuration parameters to lithium iron to improve security. 2.Optimized JKBMS Modbus protocol, added RCV RFV register support. The protocol must use the PC software version V2.5.0. 3.Fixed the Bug that the hardware version may be incorrect in the device information. 4.Add battery low temperature alarm to dry triggers.
In the meantime, JK could issue a firmware update which makes a factory reset default to an "OFF / Battery Disabled" profile, so you need to connect to the app and tell it which battery chemistry it's connected to. It seems a reasonable workaround for the problem, it'll at least prevent the issue from causing any damage.
Brilliantly done Andy. Most entertaining (and most concerning!) You’re a star, love the humour! ❤️ I’m guessing this should be an easy (though important) firmware fix.
Unfortunately - to save the values & definitions you must have some fix memory available on the boars. In case new JK-BMS can not store the values now, most probably does not exist such memory. It must be HW upgrade - therefore no way for existing board. From my perspective the buyers needs to be very carefull to buy "the cheapest" on ALI in the future. Most probably it will be THIS version. Of course only A) in case the memory seriously does not exist on todays board, B) in case JK do the changes and HW upgrade.
Up to V14.10 they don't loose their settings! I tested this version by version and the issue started from version V14.12! So it's just software related and should be fixed with a new firmware!!!
I think it's both a software (firmware) and maybe a hardware issue. They can remedy the issue by choosing the most conservative values if there is a reset to default values. But, shouldn't there be some sort of battery backup or NVRAM to contain the settings in the first place? Perhaps I'm assuming too much of these devices, but for something as important as a BMS it should have something to maintain the settings more than a few days. Today it seems like perhaps the length of time it takes to discharge a capacitor before it's erased?
@cuisinartOH1 it is 100% software related as versions V14.03 - V14.10 didn't have this issue! I tried it again and again and with all versions before V14.12 the BMS keeps the settings when power cycled or disconnected from battery.
If it at least could reset to 3,65v… I use 108s lion so for me, I probably had been “ok” anyway if I had used those bms:es. However, thank you so much for bringing this up and making all of us a lot safer. Take care, se you. 😊🇸🇪
I just saw this alert video.👍👍🙏 Thank you very much Andy and the whole community. I would like to share my thoughts. I have a Deye hybrid inverter with 5 banks of 48V batteries monitored by JK BMS. I don't know if my 2 year old BMS keeps my settings in memory after power off them. The good thing if you charge your batteries via an hybrid inverter is that the inverter supervises the battery voltage at a higher level than the JK BMS. I have banks of 16 x 3.2v LIfepo batteries in series. The JK BMS stops charging at 16x3.5V = 56V . If, after a reset, the BMS is programmed to charge at 16 x 4.2V = 67.2V, the inverter will stop charging at the setting you programmed. I programmed the inverter charging to stop at 56.5V. So even if the BMS does not have the right settings, the inverter will stop charging the batteries at 56.5V. If the JK BMS balances voltages from 3.4V it should be fine.😎😎
Thank you for the humorous late breaking news, rather unfortunate dilemma for a fairly new product on the market. Hopefully it can be resolved quickly via a firmware update and not disaster of a physical hardware recall. On a lighter note, thanks to Andy 2 we caught the glimpse to the answer of the age old question: Does the light go out when you close the SPAT fridge door?
Haha, this was fun to watch Andy 1 2 3 and 4. Glad I ordered an 'old style' JK BMS( same as my current BMS ) for my second battery. But imagine you have a professional company building battery's with this new BMS, a serious hazard for it's users !
I'm a big fan. However, I don't see why this is a big deal. I wouldnt trust ANY multi-chemistry BMS to retain its config after long disconnection. BMSes in packs are permanently connected, so I don't see any issues there as well.
@@ucheeze6220 I honestly suspect that a software (firmware) update can easily fix this. HOWEVER it would make a lot of sense to design it to default to LFP batteries- these are almost certainly going to be the vast majority as we move forward.
Not only should the BMS not lost it's configuration but the factory default should be the most common denominator for safety i.e. the battery type with the lowest voltage. This way a BMS that resets to factory default would be an inconvenience but not a safety hazard
Uffff! I have just received 6 JK BMSes but the older ones. I am happy to know they are not affected by this, but I will watch closely AND in addition limit voltage at MPPT end. Thank you Andy!
LOL! That’s awesome. I loved the video and your creativity in making it. A fun way to present a serious issue. And that Andy guy is so good looking too! Thanks for sharing this issue. This is so important to alert the entire solar/battery community. Cheers!
Hi Andy, I watch all of your Videos from Testings and settings on the jk bmses. I saw the Last vid, when you made changings in the setting on 40 ah to 280. Then you made other changing and slide Back, and the Changes resetted to 40ah. The use of the Software ist also a pain in the ass, IT should be working Just Like the App! Other people in the German Community also Had problems with normal Brand new jk BMS, Like the first cell didn't appear in the app or the setted cellovervoltageprocection ist Not working correctly, IT didn't Stop charging. And I thought IT IS the best on the Planet and I planed to buy one. But now, IT Changes my mind. Anyway, your Last Video is the best Cross between Harald Schmidt and Herbert Feuerstein. Lovely greetings and Happy new year from Germany
Thanks a lot Andy. I have 3 of the Inverter style JK BMS enroute and really appreciated this input. I'll be testing out 1 on a smaller spare pack I have and run it through its paces. Plan is to hook up an ESP8266 to gather some test data and also add an alarm in case the settings change during operations. They won't be replacing my 3 "old" style BMSes anytime soon though. We'll see how it pans out. Cheers from Denmark!
Hi Andy great work on the potential safety hazard on the JK inverter bms. Just would like share this with after seeing your video on this i decided to check all my bms,s non inverter type . and found that my one bms had reset its self to 4.20 OVP , i have not switched my system off for 12 months and more . I dont think that the issue is only with the new inverter bms,s . So i think there is a definite problem here . This is very concerning
incredible performance, Andy! despite the serious of the subject, it has been the most funny of the vieos I have seen ever ! I appreciate very much the hard work done in the plan, story, dressings, edition,.... but the better is the beer flying from tht hand of your assistant 😂😂😂😂 I have seen it three times and still laughing. You are simply the master. Best regards from cold Madrid, Jose
That is a great way to teach a subject to the masses. I am wondering if you reported the serious and potentially fatal flaw in the device to Electrical Safety Queensland? They have the authority to issue safety alerts and order product recalls for situations like this.
I bought a 150amp version of this bms in the first week of launch, but have put off installing it atm, after Andy’s review at that time. I am still running on my older style JK bms for now, JK will get this sorted with the utmost urgency, Thanks am sure.
Hi Andy, Too funny on the presentation. You may have stumbled into a new career path! LOL. Thanks for sharing. Also, people should think about locking down the Victron pairing code from the default since I believe a person could easily change the charging parameters for your battery. ( Mainly thinking of folks in a RV / camp park). Keep up the good work and keep the news coming!
Thanks for the information, but the much more important information is at the very end of the video. Now we finally know that the light in the refrigerator goes off when you close the door. greetings from Munich
Thank you Andy for making all of us viewers safer. Andy (the one in the suit) you were really "killin' it" (that's American for looking really good). You look just like a professional German engineer.
Thanks very much, Andy. This community is really great to distribute important information. The good thing is, they are listing to you, Andy, that's fantastic. I've immediately contacted them, too. They told me, that they are fixing it right now and provide a new software very soon. The other types of BMS - 8S-24S or 4S-8S they say, do not have this failure. I'm just testing a 4S-8S version to confirm this.
They are wrong I have already warned of this problem on a 2a200a which cuts itself!!! and renisilialize and who made me inflate the batteries up to 3.85v then I noticed!!! but it remains swollen for life now!!!
Yes because it gives me the firmware of WhatsApp directly and sometimes I give to Andy and a week ago I told them that it is not going at all !!! The 14.15!
I recently bought one of the older style and when building my pack I left it off a few days and then found it was back on 4.2v, but I had been playing so much with the settings and 8cell 4cell as I was balancing them all I thought it was me, and that I had reset the BMS. *if* the hw can't be prevented from having amnesia then it needs new software with a new 'useless capacity but safe for all chemistry's ' as the default.
Thanks for pointing this out, if a reset should occur in the worst case of a BMS, it should always come to the smallest battery possible, so a default of Li-ion is "not good".
What is the difference from a new device? You must set all parameters to your battery configuration and must change Li-ion to Lifepo4, Andy has a video about this. To me it's unclear and under what condition the BMS reset.
Thanks for the heads up Andy! I’ve learned so much from your channel already, and this is a great addition. Even though I just bought this BMS, I’m still going to use it. I’ll add additional monitoring to prevent these issues.
A BMS definitely shouldn't randomly forget its settings and especially not allow charge/discharge to turn back on until it has been re-configured. If any defaults are to be automatically restored and enabled, they should be set to values within the safe range for any cells the BMS is intended for use with. For a BMS primarily intended for NMC, NCA, LFP and (maybe) Na-ion cells, safe (though far from optimal) defaults would be something like 3V under-voltage, 3.4V over-voltage and 1/20th of the BMS' rating for charge/discharge current.
if they dont have enough persistent storage on the board for all values, your implied suggest of keeping it disabled until the settings are confirmed would be an accetable workaround, if you can store a backup of all settings on your phone
@@HolgerNestmann I'd be really surprised if the micro-controller used on the board doesn't have enough internal storage for at least storing safety-critical parameters. Tons of micro-controllers have over 1kB of on-chip EEPROM for stuff like that.
congratulations on the direction of the video, I completely understand you, you are doing their job to discover errors and when they are critical (they can cause serious damage, fire, etc.) it is reasonable to expect JK developers to fix the same errors immediately or in a maximum of 24 hours. What abut other JK BMS models like JK_DB6A17S8P i have.I saw you have black model 200A similar model to B2A20S20P or just that model. Are they affected with same bug or not ??
Wow, massive Andy x invasion, oh sorry, competence! In 1986 I stopped owning a TV set without regretting this. Until now when I nearly missed breaking OG News from down under. Thanks a lot, have a nice day and a save battery life. Excellent work and best entertainment as well. Bravo bravissimo!
Hallo Andy, super Video! Ich habe es in vollen Zügen genossen. Deine Videos sind nicht nur eine Quelle von guten Informationen, sondern Dein Kanal auch der beste und unterhaltsamste, den ich kenne. - Ich habe bei meinem System nur zwei JK-BMS (JK-B2A8S20) für jeweils 8 Zellen im Einsatz, werde aber testen, ob sie das gleiche Verhalten aufweisen. Ich finde es auch ebenfalls als einen Mangel, dass die APP auf dem Smart-Phone nicht die Möglichkeit bietet, ein Setup abzuspeichern.
Wow i was literally just about to buy one of those! Good thing I decided to wait until the specs of the battery pack are more clear... Thank you very much for your work, keep on doing what you're doing! Mach weiter so und liebe Grüße aus dem Heimatland!✌🏻🇩🇪🔋⚡
The BMS settings is always my last line of defense but I never allow it to have the final say on the circuit. It is the inverter and the charger that always have the final say when to stop discharging or when to stop charging the battery respectively.
Thanks Andy for the information. Question 1 : do you know if older jk bms B2A8S20P-HC have the same issue ? Question 2 : could you tell the way to create the problem and check if the issue is global or local ? From my point of view the issue is software. In case of reset they could force to revalidate the setting and not let the bms run without an human validation of the setting. Other option is to reset to the most conservative setting. ... Let us know when it ll be solved.
JK confirmed this morning to me, that the older "stand alone" BMSs do not have this issue. They say, that exactly these "not inverter" BMS are often used in cars or ships, where the system is switched off from time to time by use case. And they never had this issue reported before. They have these type running in the field now over 5 years with no safety issues.
Great discovery. I bet some of your followers could whip up a circuit of a 3.70V triggered op-amp piezo buzzer/breaker trip addition, that could apply to any BMS managed system. Because I'm old, I'd prefer a jumper/switch on board for such a vital setting, like an earlier viewer suggested. With such a complex device, i can however see how this could get overlooked, while they're quickly taking care of all the other refinements you've been suggesting.
Good catch! I have my own 48V battery packs in different sizes and different chemistry as well, hookup to 15kW Sigineer inverter. Aside from BMS per battery pack, added a voltage monitor/relay and contactor to trigger the over/under voltage cutoff. Not efficient and fancy as Peter board but old school rules.
UNBELIEVEABLE! You have to much energy overproduction with which you can operate an ACS (Andy Cloning System)! In normal that costs billions of bugs if you do it with energy from grid! Thank you for again for another entertaining video about fundamental things around the Solar- and Battery- Community. I promise that I will have an eye on my JKs. Prost Marc
If the system is going to be 'powered down', physical DIP switches (or links) for config would ensure this could NEVER happen - well done Andy for bringing this glaring design flaw to a global audience; and, as others have said, the humorous introduction!
JK just told me, that they will fix this critical error with the highest priority. The fix will be done today, followed by internal quality checks and testing. So that may takes a few days. My impression is, that they take this very seriously.
Well done Andy for bringing this to everybody's attention. Whilst I totally agree that this new JK BMS is potentially dangerous and that those who are about to buy a BMS should now look at other makes, the old JK BMS has stood out as being the the best on the market (see Andy's previous videos). Unless it is shown that these older JK BMSs have a dangerous fault I will continue to use them. I have three on a land based application which is a much lesser risk than on a boat. For most of us the 5v start up procedure is only a one-off procedure during first start up so is a minor inconvenience.
And the response i received when i questiond the same issue "Hello, please do not close BMS. Closing BMS will restore the default settings regardless of what it is. This is factory set. You can choose to use the sleep mode in the app, which will not reset your parameter settings.
There will be 45min test video about that soon. We will test thoroughly. I just need to convince Andy2 to stay inside the fridge to confirm our suspicion!
The topic is quite intriguing, and I must commend Andy for shedding light on this matter with a touch of humor rather than causing panic. I'm curious about the solutions JK might implement to address this issue. Perhaps transferring the firmware from flash memory to permanent ROM could be a viable option, though I'm not certain about its feasibility. I'm hopeful that a firmware update will suffice to fix the problem. For those who have already purchased this BMS, it raises questions about how JK plans to rectify the situation. Personally, I've decided to hold off on acquiring this BMS until it receives Andy's seal of approval and confirmation that necessary modifications have been made. It's a bit nerve-wracking, yet oddly amusing-I appreciate Andy's lighthearted approach to a potentially serious matter. Kudos to his entertaining perspective!
Wow! Very creative, Andy, and a great public service in letting us know of this potential safety hazard. As you stated there has been "ups and downs" with this BMS since you first reviewed it. However, you were very keen on this device and I am sure many viewers have purchased this BMS per your reviews. I hope whoever they are, they all see this video and take the appropriate action. With all the "ups and downs" documented and now this..............well, even if they fix this, can we trust JK products down the road? What do you think?
I just ordered 4 of 150A version and I really think about cancelling because I don't think a sw-solution can resolve this major bug! I once had one of the first smart-phones on the market (XDA). It had a volatile memory - awful!
I guess, when time without power is the issue they would have to install some kind of firmware battery (bios battery). On the other hand, simply turning it off bit connected to the battery, might prevent the problem. In which case they would only have to check the state of memory, or detect the reset at powerup and tell this to the user. One might also simply use conservative basic settings after a reset. There is still the inconvenience of having to reprogram but the danger will be gone. Simply reprogramming each “weekend” is not a real solution either. They will have to find a way to keep the memory powered somehow of that is the actual problem. That would mean changes in hardware. On the other hand it might just be a software routine forgetting to write settings to the right place. Old desktop computers loose their settings after a backup battery error, bit sometimes also after a hardware error of failure. Some temporary short in a component can happen to any and all electronics. This should never lead to dangerous situations. I guess they just launched the product too soon.
I’ve been using this brand for many years on top of using them I helped many friends building theirs battery’s and advised this BMS ! This are shocking news !! I’ve witnessed the battery capacity being changed to the default value of 40A, but not a full reset . Very concerning !!
Thank you for sharing this information - and the nice video! It seems to me that JK is storing the information in a NV-RAM which power supply is buffered by a capacitor. This will last for some time - and after this capacitor is discharged the information is gone. But they should never use a setting which can cause major trouble as a default then 😕 Grüße aus Deutschland, Klaus
That is the best you tube video I have watched all year,ps I unfortunately ordered one of those BMS yesterday, hoping they come up with a firmware update, thanks again very entertaining
Well done Andy. You will get a call soon to join the Home and Away cast. On to the J K, fortunately we have set our solar charge controllers to turn off (mine) at 3.5 volts a a first line of defence.
I have not tried that, but usually, the button is hidden from the front panel and you need a sharp tool to get i and push the button. Yes, that should reset to factory default (but not reset the password).
@@OffGridGarageAustralia Andy, please 🙏🏻 you can tell the manufacturer JK that they need to add, when the battery charges closer to 100%, they need to reduce the current by CAN message for Invertor such as SOLIS. It is also important to know for JK that as soon as the inverter receives information from the BMS that it is 100%, the inverter stop charging the battery
Two things are incredible: 1) the swarm intelligence consolidated on Andy's platform to disclose such dramatic issues and 2) Andy's additional talent as entertainer.
The swarm of andys
Please update a new version:
V14.16 Upgrade logs
1.Fixed a bug that could be lost if parameters were lost. The bug is caused by a logical error in the parameter entered by the user.
2.Change the default configuration parameters to lithium iron to improve security.
2.Optimized JKBMS Modbus protocol, added RCV RFV register support. The protocol must use the PC software version V2.5.0。
3.Fixed the Bug that the hardware version may be incorrect in the device information.
4.Add battery low temperature alarm to dry triggers.
@@juanluisaniaspinel9379 does it mean they have a fix?
Andy - genial gemacht. Du bist nicht nur ein toller Erklärbär, auch ein super Nachrichtensprecher 😂
The production value is impeccable
Impressive, but as a broadcast engineer, I'd have to say the shots where the camera switches back from Andy to Andy3 in the sit-down interview... The camera is on the wrong side. The camera should be on the same side of the room, the same side of the interviewer and their subject, e.g. right of interviewer and left of their subject.
If you put the camera angles as he did, we call it "crossing the line".
Now Andy, you did it again. The entertainment and informational value is why I look forward to your videos each and every time! Keep it up!
The battery type should be a jumper pin or dip switch on the board so there is a physical hardware element to the chemistry profile it uses in my opinion.
Or at the very least safe settings for all battery types...
If it was saved in a permanent memory (like every other BNS), it would not be an issue either.
-V14.17 Upgrade logs
1.Fixed a bug where parameters were lost after BMS restart. The bug is caused by a logical error in the parameter entered by the user.
2.Change the default configuration parameters to LPF to improve security.
2.Optimized JKBMS Modbus protocol, added RCV RFV register support. The protocol must use the PC software version V2.5.0。
3.Fixed the Bug that the hardware version may be incorrect in the device information.
4.Add battery low temperature alarm to dry triggers.
-@2024-01-09 by JKBMS
hi, where is the firmware download site?
As much as this sucks for JK and their customers, this channel is a major benefit to all. Without this network of communication, development and safety would take much longer to resolve.
Yes, absolutely. The community and info is great. Love it1
Best video i've ever seen!
Does recommending what is now a unsafe product make you potentially liable. If the BMS defaults back to original settings and a fire causes loss of property and injury?
You're probably thinking ridiculous but think about it! You are basically a BATA tester for JK you receive products for free test them and suggest software changes to JK through email. God forbid if something did happen and people were injured I think in the investigation your name would pop up!
Then on the other hand JK may sue you for misrepresent their product now that everyone is jumping on the Andy bandwagon and saying across the internet all JK BMS are unsafe and faulty!
As I tried to explain to the mermaid 🙄 you are not showing people how to bake a cake!
You may need that suit!
I do worry for you all!
I love it! You have a knack, Andy, for entertaining and educating at the same time. Well done!
Many thanks!
Great video - hat's off to the Community member/s who bought this to Andy's attention and allowing confirmation and comms by Andy to wider audience. Some thing for all of us to be mindful of when directly purchasing/imported product ourselves.
Thanks for the extra work put into the entertaining intro Andy. Cheers Greg
JK fixed it! Update available on the website tomorrow. AND - default setting will be LFP ! From my view a very quick fix and good customer service. I don't know any other BMS supplier getting customer feedback and bugs addressed that quick.
Where did you get the information from?
Direct from talking to JK
JK note on their Website for the change:
1.Fixed a bug that could be lost if parameters were lost. The bug is caused by a logical error in the parameter entered by the user.
2.Change the default configuration parameters to lithium iron to improve security.
2.Optimized JKBMS Modbus protocol, added RCV RFV register support. The protocol must use the PC software version V2.5.0.
3.Fixed the Bug that the hardware version may be incorrect in the device information.
4.Add battery low temperature alarm to dry triggers.
Thanx Michael and Community!
Thanx to JK for fast Response!
In the meantime, JK could issue a firmware update which makes a factory reset default to an "OFF / Battery Disabled" profile, so you need to connect to the app and tell it which battery chemistry it's connected to. It seems a reasonable workaround for the problem, it'll at least prevent the issue from causing any damage.
Brilliantly done Andy. Most entertaining (and most concerning!) You’re a star, love the humour! ❤️
I’m guessing this should be an easy (though important) firmware fix.
Sw-solution for a reset after long bus-sleep... I doubt!
Unfortunately - to save the values & definitions you must have some fix memory available on the boars. In case new JK-BMS can not store the values now, most probably does not exist such memory. It must be HW upgrade - therefore no way for existing board. From my perspective the buyers needs to be very carefull to buy "the cheapest" on ALI in the future. Most probably it will be THIS version. Of course only A) in case the memory seriously does not exist on todays board, B) in case JK do the changes and HW upgrade.
Up to V14.10 they don't loose their settings! I tested this version by version and the issue started from version V14.12! So it's just software related and should be fixed with a new firmware!!!
Very interesting! Wonder why they decided to do this. But yeah, agreed, this should be an easy fix - but shouldn't have happened in the first place.
I think they didn't do this on purpose, it is just a bug which should be easy to fix.
@@stephanklasen2928 I don't think it's on purpose either, just wonder how it got through testing/QA. I know... but still...
I think it's both a software (firmware) and maybe a hardware issue. They can remedy the issue by choosing the most conservative values if there is a reset to default values. But, shouldn't there be some sort of battery backup or NVRAM to contain the settings in the first place? Perhaps I'm assuming too much of these devices, but for something as important as a BMS it should have something to maintain the settings more than a few days. Today it seems like perhaps the length of time it takes to discharge a capacitor before it's erased?
@cuisinartOH1 it is 100% software related as versions V14.03 - V14.10 didn't have this issue! I tried it again and again and with all versions before V14.12 the BMS keeps the settings when power cycled or disconnected from battery.
If it at least could reset to 3,65v…
I use 108s lion so for me, I probably had been “ok” anyway if I had used those bms:es.
However, thank you so much for bringing this up and making all of us a lot safer. Take care, se you. 😊🇸🇪
Thanks!
And again thank you very much🙏
I just saw this alert video.👍👍🙏
Thank you very much Andy and the whole community.
I would like to share my thoughts.
I have a Deye hybrid inverter with 5 banks of 48V batteries monitored by JK BMS.
I don't know if my 2 year old BMS keeps my settings in memory after power off them.
The good thing if you charge your batteries via an hybrid inverter is that the inverter supervises the battery voltage at a higher level than the JK BMS.
I have banks of 16 x 3.2v LIfepo batteries in series.
The JK BMS stops charging at 16x3.5V = 56V .
If, after a reset, the BMS is programmed to charge at 16 x 4.2V = 67.2V, the inverter will stop charging at the setting you programmed.
I programmed the inverter charging to stop at 56.5V.
So even if the BMS does not have the right settings, the inverter will stop charging the batteries at 56.5V.
If the JK BMS balances voltages from 3.4V it should be fine.😎😎
My JK BMS is on my way from China and this is what I was thinking to do. It makes a lot of sense. Let us hope the problem will be solved soon.
Thank you for the humorous late breaking news, rather unfortunate dilemma for a fairly new product on the market. Hopefully it can be resolved quickly via a firmware update and not disaster of a physical hardware recall.
On a lighter note, thanks to Andy 2 we caught the glimpse to the answer of the age old question: Does the light go out when you close the SPAT fridge door?
Haha, this was fun to watch Andy 1 2 3 and 4.
Glad I ordered an 'old style' JK BMS( same as my current BMS ) for my second battery.
But imagine you have a professional company building battery's with this new BMS, a serious hazard for it's users !
I have an older JK that’s been sitting in the cupboard. I’ll have to “fire it up” and confirm that it’s held all its settings!
EEL started selling batteries with the new JK.....
I'm a big fan. However, I don't see why this is a big deal. I wouldnt trust ANY multi-chemistry BMS to retain its config after long disconnection. BMSes in packs are permanently connected, so I don't see any issues there as well.
@@ucheeze6220 I honestly suspect that a software (firmware) update can easily fix this.
HOWEVER it would make a lot of sense to design it to default to LFP batteries- these are almost certainly going to be the vast majority as we move forward.
@@ucheeze6220So far, AS Andy Has mentioned in the end. When does this reset Occur? It should never happen!
Thanks for a hilarious video, Andy. It very clearly puts your safety concerns across to all your viewers.
Not only should the BMS not lost it's configuration but the factory default should be the most common denominator for safety i.e. the battery type with the lowest voltage. This way a BMS that resets to factory default would be an inconvenience but not a safety hazard
Andy, großartige Produktion! Du bist ein echter Entertainer.
Uffff! I have just received 6 JK BMSes but the older ones. I am happy to know they are not affected by this, but I will watch closely AND in addition limit voltage at MPPT end. Thank you Andy!
How do we know which models are affected?
Do older models ship with new firmware like this one?
Danke!
Thanks a lot. I'll give this to Andy2🍺
Love the tag still on the sleeve of the suit jacket. It shows how much you wear those things!
Andy2 seems like a pretty sharp fellow. You should have him on the show more often.
He's very expensive and the video takes 3 times longer to make and edit😄
LOL! That’s awesome. I loved the video and your creativity in making it. A fun way to present a serious issue. And that Andy guy is so good looking too! Thanks for sharing this issue. This is so important to alert the entire solar/battery community. Cheers!
Hi Andy, I watch all of your Videos from Testings and settings on the jk bmses. I saw the Last vid, when you made changings in the setting on 40 ah to 280. Then you made other changing and slide Back, and the Changes resetted to 40ah. The use of the Software ist also a pain in the ass, IT should be working Just Like the App!
Other people in the German Community also
Had problems with normal Brand new jk BMS, Like the first cell didn't appear in the app or the setted cellovervoltageprocection ist Not working correctly, IT didn't Stop charging.
And I thought IT IS the best on the Planet and I planed to buy one. But now, IT Changes my mind.
Anyway, your Last Video is the best Cross between Harald Schmidt and Herbert Feuerstein. Lovely greetings and Happy new year from Germany
Thanks for the update Andy. I’ve just ordered 3x 48v batteries,hopefully this is fixed by the time that they arrive
I'm so happy, not having bought this bms but the old one! Thanks to all.
Thanks a lot Andy.
I have 3 of the Inverter style JK BMS enroute and really appreciated this input. I'll be testing out 1 on a smaller spare pack I have and run it through its paces. Plan is to hook up an ESP8266 to gather some test data and also add an alarm in case the settings change during operations. They won't be replacing my 3 "old" style BMSes anytime soon though.
We'll see how it pans out.
Cheers from Denmark!
Hi Andy great work on the potential safety hazard on the JK inverter bms. Just would like share this with after seeing your video on this i decided to check all my bms,s non inverter type . and found that my one bms had reset its self to 4.20 OVP , i have not switched my system off for 12 months and more . I dont think that the issue is only with the new inverter bms,s . So i think there is a definite problem here . This is very concerning
omg... can you add the model numbers here?
incredible performance, Andy!
despite the serious of the subject, it has been the most funny of the vieos I have seen ever !
I appreciate very much the hard work done in the plan, story, dressings, edition,.... but the better is the beer flying from tht hand of your assistant 😂😂😂😂
I have seen it three times and still laughing.
You are simply the master.
Best regards from cold Madrid,
Jose
That is a great way to teach a subject to the masses. I am wondering if you reported the serious and potentially fatal flaw in the device to Electrical Safety Queensland? They have the authority to issue safety alerts and order product recalls for situations like this.
Wow thanks for sharing this important information have just bought a 200amp bms not installed as yet hope the fix that problem toot sweet. 🇦🇺
I bought a 150amp version of this bms in the first week of launch, but have put off installing it atm, after Andy’s review at that time. I am still running on my older style JK bms for now, JK will get this sorted with the utmost urgency, Thanks am sure.
your creativity regarding the films you make beats me. Thanks for this scary information
Thank you very much Andy for the informative and entertaining breaking report!
Thanks Andy. So glad to see you be Pro Active in concern for "Our" safety 😊
Great introduction. Thank you for the video.
Hi Andy, Too funny on the presentation. You may have stumbled into a new career path! LOL. Thanks for sharing. Also, people should think about locking down the Victron pairing code from the default since I believe a person could easily change the charging parameters for your battery. ( Mainly thinking of folks in a RV / camp park). Keep up the good work and keep the news coming!
Loved the Video!!! That was Great!!! To bad for the BMS tho, Great find and hope everyones builds are ok!
Thanks for the information, but the much more important information is at the very end of the video. Now we finally know that the light in the refrigerator goes off when you close the door. greetings from Munich
Thanks much Andys!!! I'm about to build a battery bank for my inverter. I'm really thankful I saw this. Maybe, I'll just stay with DALY BMS
Thank you Andy for making all of us viewers safer. Andy (the one in the suit) you were really "killin' it" (that's American for looking really good). You look just like a professional German engineer.
This cracked me up, but is a serious matter.
Thanks to all the Andy's
Thanks very much, Andy. This community is really great to distribute important information. The good thing is, they are listing to you, Andy, that's fantastic. I've immediately contacted them, too. They told me, that they are fixing it right now and provide a new software very soon. The other types of BMS - 8S-24S or 4S-8S they say, do not have this failure. I'm just testing a 4S-8S version to confirm this.
They are wrong I have already warned of this problem on a 2a200a which cuts itself!!! and renisilialize and who made me inflate the batteries up to 3.85v then I noticed!!! but it remains swollen for life now!!!
@@patrickruiz6764 So you had this issue with this new Inverter-BMS like Andy, right?
Yes because it gives me the firmware of WhatsApp directly and sometimes I give to Andy and a week ago I told them that it is not going at all !!! The 14.15!
I have a circle with 3 engineer on WhatsApp and I tell them the communication problems in 2 BMS EN // and Victron System !!!
@@patrickruiz6764 What do you mean by "which cuts itself" - You mean that it restarted/reseted itself without any particular reason?
Andy, you start becoming a legend😂. If it wasn't for the bad news, great job in getting it across this way..hillarious
I recently bought one of the older style and when building my pack I left it off a few days and then found it was back on 4.2v, but I had been playing so much with the settings and 8cell 4cell as I was balancing them all I thought it was me, and that I had reset the BMS. *if* the hw can't be prevented from having amnesia then it needs new software with a new 'useless capacity but safe for all chemistry's ' as the default.
Even more amazing than usual! Thanks for the Breaking News!
Thanks for pointing this out, if a reset should occur in the worst case of a BMS, it should always come to the smallest battery possible, so a default of Li-ion is "not good".
What is the difference from a new device? You must set all parameters to your battery configuration and must change Li-ion to Lifepo4, Andy has a video about this. To me it's unclear and under what condition the BMS reset.
@@IesKorpershoek after a few days unpowered, the device resets itself which is totaly unexpected and very dangerous
@@edwardvanhazendonk Mabey very stupid but does unpowered mean all red cell wires are detached? That's the only way the BMS is powerless.
@@IesKorpershoekthe answer to that question is in the video
You're the best solar communicator! Great video Andy! Congrats from Spain, in the other side or the world.
Thanks for the heads up Andy! I’ve learned so much from your channel already, and this is a great addition.
Even though I just bought this BMS, I’m still going to use it.
I’ll add additional monitoring to prevent these issues.
A BMS definitely shouldn't randomly forget its settings and especially not allow charge/discharge to turn back on until it has been re-configured. If any defaults are to be automatically restored and enabled, they should be set to values within the safe range for any cells the BMS is intended for use with. For a BMS primarily intended for NMC, NCA, LFP and (maybe) Na-ion cells, safe (though far from optimal) defaults would be something like 3V under-voltage, 3.4V over-voltage and 1/20th of the BMS' rating for charge/discharge current.
if they dont have enough persistent storage on the board for all values, your implied suggest of keeping it disabled until the settings are confirmed would be an accetable workaround, if you can store a backup of all settings on your phone
@@HolgerNestmann I'd be really surprised if the micro-controller used on the board doesn't have enough internal storage for at least storing safety-critical parameters. Tons of micro-controllers have over 1kB of on-chip EEPROM for stuff like that.
grandios!!!😂😂😂
Irre, wieviel Arbeit du dir machst…vielen lieben Dank!!!
Great video! I cannot wait to see how JK will respond to solve the issue.
The Best Channel for Solar and Batteries so far on youtube.
congratulations on the direction of the video, I completely understand you, you are doing their job to discover errors and when they are critical (they can cause serious damage, fire, etc.) it is reasonable to expect JK developers to fix the same errors immediately or in a maximum of 24 hours.
What abut other JK BMS models like JK_DB6A17S8P i have.I saw you have black model 200A similar model to B2A20S20P or just that model. Are they affected with same bug or not ??
Andy 2!!! You are awesome!!! I thought i will never see you again!! Best content ever!!!
Andy, du bist der Knaller! Mal sehen, ob du für den Oscar nominiert wirst! Grüße aus der alten Heimat!
Thanks a lot for all, greetings from at the river of Lahn in the midwest of Hessen. bleib gesund! Max
Wow, massive Andy x invasion, oh sorry, competence! In 1986 I stopped owning a TV set without regretting this. Until now when I nearly missed breaking OG News from down under. Thanks a lot, have a nice day and a save battery life.
Excellent work and best entertainment as well. Bravo bravissimo!
Hallo Andy, super Video! Ich habe es in vollen Zügen genossen. Deine Videos sind nicht nur eine Quelle von guten Informationen, sondern Dein Kanal auch der beste und unterhaltsamste, den ich kenne. - Ich habe bei meinem System nur zwei JK-BMS (JK-B2A8S20) für jeweils 8 Zellen im Einsatz, werde aber testen, ob sie das gleiche Verhalten aufweisen. Ich finde es auch ebenfalls als einen Mangel, dass die APP auf dem Smart-Phone nicht die Möglichkeit bietet, ein Setup abzuspeichern.
Wow i was literally just about to buy one of those! Good thing I decided to wait until the specs of the battery pack are more clear...
Thank you very much for your work, keep on doing what you're doing!
Mach weiter so und liebe Grüße aus dem Heimatland!✌🏻🇩🇪🔋⚡
Great content as usual Andy!! You're the best!
The BMS settings is always my last line of defense but I never allow it to have the final say on the circuit. It is the inverter and the charger that always have the final say when to stop discharging or when to stop charging the battery respectively.
Just Brilliant, thanks Andy, Andy 3 and Andy 4.
Now I know how you manage to make so many videos, you have a whole team of andy.s working for you! Go team Andy! Love the comedy!
To bad, I ordered a couple of this bms two weeks ago, hopefully they can be fixed, thanks for the information!
Thanks Andy for the information.
Question 1 : do you know if older jk bms B2A8S20P-HC have the same issue ?
Question 2 : could you tell the way to create the problem and check if the issue is global or local ?
From my point of view the issue is software.
In case of reset they could force to revalidate the setting and not let the bms run without an human validation of the setting.
Other option is to reset to the most conservative setting.
...
Let us know when it ll be solved.
I agree that this is just a software issue. The BMS memory should not lose power even if turned off since it is connected to the battery.
JK confirmed this morning to me, that the older "stand alone" BMSs do not have this issue. They say, that exactly these "not inverter" BMS are often used in cars or ships, where the system is switched off from time to time by use case. And they never had this issue reported before. They have these type running in the field now over 5 years with no safety issues.
Almost ordered two of these for $300 US. Decided to just get the older model, non-inverter B2A20S20P for 2 for $200…glad I did.
بہت ہی لاجواب اپ کا اسٹائل اچھا لگا
Great discovery. I bet some of your followers could whip up a circuit of a 3.70V triggered op-amp piezo buzzer/breaker trip addition, that could apply to any BMS managed system.
Because I'm old, I'd prefer a jumper/switch on board for such a vital setting, like an earlier viewer suggested. With such a complex device, i can however see how this could get overlooked, while they're quickly taking care of all the other refinements you've been suggesting.
Good catch! I have my own 48V battery packs in different sizes and different chemistry as well, hookup to 15kW Sigineer inverter. Aside from BMS per battery pack, added a voltage monitor/relay and contactor to trigger the over/under voltage cutoff. Not efficient and fancy as Peter board but old school rules.
UNBELIEVEABLE! You have to much energy overproduction with which you can operate an ACS (Andy Cloning System)!
In normal that costs billions of bugs if you do it with energy from grid!
Thank you for again for another entertaining video about fundamental things around the Solar- and Battery- Community.
I promise that I will have an eye on my JKs.
Prost
Marc
Thanks Andy ! So much entertaining and good knowledge
If the system is going to be 'powered down', physical DIP switches (or links) for config would ensure this could NEVER happen - well done Andy for bringing this glaring design flaw to a global audience; and, as others have said, the humorous introduction!
Nice to know. I bought yesterday two PB2A16S20P bmses :D
Hi Andy, I got mine too with 65.8V!
JK just told me, that they will fix this critical error with the highest priority. The fix will be done today, followed by internal quality checks and testing. So that may takes a few days. My impression is, that they take this very seriously.
They have to I guess. I'm sure plenty of sales comes from Andy's videos, so this would be a pretty big loss as long as they are stamped as dangerous
Well done Andy for bringing this to everybody's attention. Whilst I totally agree that this new JK BMS is potentially dangerous and that those who are about to buy a BMS should now look at other makes, the old JK BMS has stood out as being the the best on the market (see Andy's previous videos). Unless it is shown that these older JK BMSs have a dangerous fault I will continue to use them. I have three on a land based application which is a much lesser risk than on a boat. For most of us the 5v start up procedure is only a one-off procedure during first start up so is a minor inconvenience.
OH Andy. That was so good. I have tears from laughter, and at the same time learned what a BMS is. Brilliant😂😂😂👍👍👍
Andy2 for president (of every country) 😂
Excellent work from the team of Andy's for reporting on this issue
Super Andy, einfach gut gemacht aber mit wichtigen Inhalt!Danke
And the response i received when i questiond the same issue "Hello, please do not close BMS. Closing BMS will restore the default settings regardless of what it is.
This is factory set.
You can choose to use the sleep mode in the app, which will not reset your parameter settings.
sounds not good. also several comments that state the issue is also the same with some old jk bms
The light does go out when you shut the fridge door ! :D
It's now proofed by Andy 2.
But how do we know it is the same on the northern hemisphere ? 🐸
There will be 45min test video about that soon. We will test thoroughly. I just need to convince Andy2 to stay inside the fridge to confirm our suspicion!
Brilliant presentation Andy! Ah well all of the Andy's.
This is Best way ever ask JK make changes!
This is so big motivation kick!
You are amazing!
Thanks a lot!
you're the best, Thanks for disseminating the info.
Share and spread the word! Thank you Andy1, 2, 3 and 4.
The topic is quite intriguing, and I must commend Andy for shedding light on this matter with a touch of humor rather than causing panic. I'm curious about the solutions JK might implement to address this issue. Perhaps transferring the firmware from flash memory to permanent ROM could be a viable option, though I'm not certain about its feasibility. I'm hopeful that a firmware update will suffice to fix the problem.
For those who have already purchased this BMS, it raises questions about how JK plans to rectify the situation. Personally, I've decided to hold off on acquiring this BMS until it receives Andy's seal of approval and confirmation that necessary modifications have been made.
It's a bit nerve-wracking, yet oddly amusing-I appreciate Andy's lighthearted approach to a potentially serious matter. Kudos to his entertaining perspective!
Wow! Very creative, Andy, and a great public service in letting us know of this potential safety hazard. As you stated there has been "ups and downs" with this BMS since you first reviewed it. However, you were very keen on this device and I am sure many viewers have purchased this BMS per your reviews. I hope whoever they are, they all see this video and take the appropriate action.
With all the "ups and downs" documented and now this..............well, even if they fix this, can we trust JK products down the road? What do you think?
I just ordered 4 of 150A version and I really think about cancelling because I don't think a sw-solution can resolve this major bug! I once had one of the first smart-phones on the market (XDA). It had a volatile memory - awful!
I guess, when time without power is the issue they would have to install some kind of firmware battery (bios battery). On the other hand, simply turning it off bit connected to the battery, might prevent the problem.
In which case they would only have to check the state of memory, or detect the reset at powerup and tell this to the user. One might also simply use conservative basic settings after a reset. There is still the inconvenience of having to reprogram but the danger will be gone.
Simply reprogramming each “weekend” is not a real solution either.
They will have to find a way to keep the memory powered somehow of that is the actual problem. That would mean changes in hardware. On the other hand it might just be a software routine forgetting to write settings to the right place.
Old desktop computers loose their settings after a backup battery error, bit sometimes also after a hardware error of failure. Some temporary short in a component can happen to any and all electronics. This should never lead to dangerous situations.
I guess they just launched the product too soon.
Thanks for the update.
You are fantastic Andy - Happy New Year 2024 from Denmark 🤣🙏👍
I’ve been using this brand for many years on top of using them I helped many friends building theirs battery’s and advised this BMS ! This are shocking news !! I’ve witnessed the battery capacity being changed to the default value of 40A, but not a full reset . Very concerning !!
Thank you for sharing this information - and the nice video!
It seems to me that JK is storing the information in a NV-RAM which power supply is buffered by a capacitor. This will last for some time - and after this capacitor is discharged the information is gone. But they should never use a setting which can cause major trouble as a default then 😕
Grüße aus Deutschland, Klaus
That is the best you tube video I have watched all year,ps I unfortunately ordered one of those BMS yesterday, hoping they come up with a firmware update, thanks again very entertaining
Well done Andy. You will get a call soon to join the Home and Away cast. On to the J K, fortunately we have set our solar charge controllers to turn off (mine) at 3.5 volts a a first line of defence.
And I thought I was crazy for designing a parallel board for lithium 18650 packs. happy you ok.
This is by far your best video.
It also reset to factory settings if you push the bottom on the CAN-RS board
It is the purpose of this button
@@ВладиславМартишев I don’t know where you got this from, for example, I didn’t find a description of these buttons in the documentation
I have not tried that, but usually, the button is hidden from the front panel and you need a sharp tool to get i and push the button. Yes, that should reset to factory default (but not reset the password).
@@OffGridGarageAustralia Andy, please 🙏🏻
you can tell the manufacturer JK that they need to add, when the battery charges closer to 100%, they need to reduce the current by CAN message for Invertor such as SOLIS.
It is also important to know for JK that as soon as the inverter receives information from the BMS that it is 100%, the inverter stop charging the battery