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
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.
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.
Agree that the BMS should not reset to a state that can cause catastrophic failure and go poopy in its pants as well as turning the Offgrid Garage into the Offgrid BBQ. In any process there should not be systems where there is only 1 safety. Hypothetically in this instance the charge controllers in both the Multiplus and the MPPTs should be set to limit maximum charge. I believe the Multiplus can also do an OVP disconnect as well, stopping the charge. Hopefully JK react quickly and provide a solution. This should be written to CMOS memory on the BMS and should write your settings to memory that does not get overwritten in a power down event.
Ich schmeiß mich weg. Das hast du super gemacht Andy. Da muss man beide👍👍 nach oben geben. Wenn es nur nicht so einen ernsten Hintergrund hätte. Sind halt Produkte aus China. Das erinnert mich an letztes Jahr. An die Sache mit den Microwechselrichtern und dem fehlenden Relais.👍
THANKS FOR THE WARNING and I have subscribed out of appreciation of your warning. (Referred from The Digital Mermaid) PS. You Aussies are known by us Kiwis for horrible snakes and spiders. I now see why Bugs don't stand a chance. Once again thanks!
I'm guessing some people have had this happen to know the problem is there. At 4.2 volts, I would guess Lifepo4 cells would expand and maybe push the tops off (explode) the cells and cause the cells to be in part or totally ruined. I would also guess that if cells expand, it could cause shorts and with heat, fires of flammable stuff around that heat. Would like to hear from anyone that had their cells charging at lithium ion voltages, what did it do to the cells?
Not only is a factory reset a terrible idea but it is made worse by the overvolt factory setting being so high. If the default was 3.5V this would be more a nuisance trip. The BMS would trip at high SoC before the charger shutoff. This would be "fail safe" in that while annoying it would alert the user of the issue in a safe manner. Combine "random" factory reset and the factory default being 4.2V is what makes this so dangerous.
News just coming in, a developer in China jumped out of a tall building this morning... Seriously, JK WFT... I can only guess this is an oversight in their rush to market a product.. At the very least the board should default to safe settings for all battery types... Or better still, charge and discharge mosfets off until programmed...
Hi, This makes you wonder if you should trust solely on software for protecting agains possible disasters like this. Perhaps some things should be backed up in hardware, old fashioned jumpers and parts dying at extreme circumstances. Thyristors set by physicsl jumpers can easily fix this I think. Most high class powersupplies use them as backup. Leaving everything up to software may not be a good idea. Even a basic seperate device could simply shortcircuit the supply and blow the fuse to prevent over voltage. Andy.. this is an eye opener, thank you 👍🏼 Addendum: A youtuber called Nate accidentally overcharged a pack to 3.85V and created balloons. Think what could happen at 4.2 volt while you are sleeping aboard or upstairs.
Disturbing! I had done a power down a few days ago via the power button to change something but just for a few minutes. I did not disconnect the battery. I luckily have my Victron MPPT charge controllers set to 55.2 volt charge and the battery is very well balanced as well as it has been cloudy and only got one full charge in all this time. I just checked my settings this morning after seeing the community posts and all was well. I still have the old JK BMS and a "Peter" slave I can put in place. Question is, can I chain to the Venus OS and the Growatt inverter on the same CAN?
Andy, Is that true with all JK bms’s or just the new one you have been testing? I have 24 volts system with the older 200 amp JK bms. It’s always on but now I’m worried that if it goes down for some reason, it will go back to factory settings. Do you know if it’s the same?
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!
Hello, I have been using the 14.15 in my test battery for some time now. It seems that the problem with losing the setting has been fixed in this version. Up to 12 hours even without power supply, the red cable disconnected, brings back the set values after switching on. I only use one Akku pack. Greetings
The BMS does not have a battery so a capacitor will be used to keep the setting. 12 hours is OK, but I guess is 2-5 days is possible. I'm sure it will fall back to the factory setting unless it uses non-volatile memory.
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.
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.
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".
-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
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.
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!
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?
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
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.
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.
This is so dumb. All they would have to do is store settings in a partitioned Flash region on the micro-controller. Are they really storing this in RAM, or do they actively reset these values? In any case, should be easy to fix, but it shouldn't have been an issue in the first place.
Yeah, not sure how they did it. They weird part is, that the BMS is still connected to the battery, so still gets some power. The power button is really just a soft button.
@@OffGridGarageAustralia Someone in the comments mentioned that it doesn't happen with older versions of the firmware on this BMS - so should be an easy fix if so. Still, shouldn't have passed QA...
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.
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.
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.
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.😎😎
It seems as if the settings are not stored in the CMOS, but in a memory, possibly buffered by a capacitor, which is deleted as soon as no more voltage is applied. Any reasonably knowledgeable tinkerer who has mastered the Arduino platform knows how to save settings in the CMOS that are retained even without a power supply. It's just a shame that a company delivers such a piece of crap.
I just checked by 150A JK Inverter BMS (none part of a live system yet as still awaiting battery shipment), it has been off since last Wednesday and all the settings still were as expected for LiFePO4 cells. How long before this reset happens ?
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!
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 ??
Heya, oh wouw that is NOT GOOD, not good at all. I gues you all ready spoke to jk about this problem. and I'm very curious about what they think about this problem. and the next question will be even if they fix this how trust wordy they still are. w'll see what the future will bring
Hi Andy, you proved it: there ARE Germans with humor 🤣, maybe this is one of the reasons you left Germany being somewhat different? 😉. I really like watching your videos but am missing just one: multiple RESS BMSses on one Cerbo. For now I stay with my cellboard based flexible bms with hardware DIPswitches for cell balance voltage and stuff written in EPROM but these are way too expensive ( €600 for just one string of 18 batteries) and having the disadvantage of needing extra room, needed for each cell module hoovering above the cell poles.... Can you recommend me a BMS that's central, can control 16 (or maybe 18) LiFePO4 cells, has a balancing power of 1 or 2 Amps and works fine with 4 or five brothers together on a Cerbo (I ordered 40 extra LiFePO4 EVE LF280K cells and want to have 5 strings of 16 cells in parallel). Suddenly I realize: it gets very lonely here......
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.
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.
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.
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
Awesomeness ❤🤙 Just ordered a JK 8-24 100-200a.... My ANT shit itself after 3 months. Only running 100ah Eve LiFePo4 16s🤷♂️ Hopefully a firmware upgrade will sort out the new one🤞
Just can’t stop laughing, Andy! You have the gratitude of the whole community! God only knows who you just saved from a complete catastrophe.. Perhaps even someone’s life..
Hello everybody after watching Andy‘s latest video on the JK BMS I am wondering does anybody know of a 48 V 16 S bms that would be best to use I’m going to use the GS0 230 amp hour 3.6 V cells and a must inverter 5000 W
It is very important to always monitor our system! Thanks for drawing attention to it! Funny login, I really liked it! :D Was there no such problem with the older JK? I use JK-BD6Axxx for 24V system.
Hi Andy thanks a lot for the works you have done and the info you share I just received today JK BMS JK-PB2A16S15P and i am asking myself if i should send it back and buy another brand ? what about Seplos BMS 3.0 my inverter is a Sofar solar one ? do you have any advise thanks
Strange! A real factory reset disable charge and discharge in the control pannel... keeping safe but not functionnal battery. It's happens every time i give the admin password to people gaming with their BMS like a new video game ... Oh what it happens if i click here, oh nothing! And here? Oh maybe i made a mistake, i will call my tech guy : "your BMS is not working anymore!" LOL
WOW Andy that is gross negligence on the part of JK, supposed to be an expert supplier (of mickey mouse kit?). As you say, the bms is a vital protective device. I am looking at the problem from first principles, ie back to basics. Do top balancing at the end of charge cut off at xS volts, switch cell all to parallel config so they soak and self balance, then switch back. All done by a bank of auto type DPDT relays - crude but simple, maybe only needs doing once/month, by manual triggered count down timer. Its what I am building, together with a string of isolated 3.5v psu boards , one for each cell, all switch on for charging. Is this a stoopid idea? Isambard is my hero with his 6ft gauge rail system, way ahead of his time
The Problem is, that this BMSes could be used for different Cell types, if there is only the one type LiFePo mode, the BMS can only fall back in LiFePo mode..... ! Keep it as simple as possible! Its is not always a good practice, to develop one product, that fits for all the cases outside there!
Bashing "made in China" like you criticize Chinese while 95% of your equipment is made in China... 😅 This part is not usefull. This is a new bms, many people have found that something do not work correctly and they informed you, you found nothing. This flaw can be dangerous... But not really in the end cause the overall voltage applied to the pack is safe anyway (reason to stay without any communication between bms and inverter as I always recommend), this is a flaw and it's good to warn people but the "having fun" on jk or Chinese product make you a smaller person cause in the end you are not smart enough to do better then their products. Peter board... Peter board... what a joke.
There is a lot of junk out there and everyone is assuming that it will last. I have 3 solar systems for about 4 years and most of the equipment prematurely fails. Micro Inverters -failed. They were up on the roof and a huge problem to diagnose and replace. Well known brand of solar panels - junk. I finally realized that the drop in power generation was not due to cloudy days. Again, up on the roof and took them all off only to find junction boxes that had detached, the white backing sheet bubbling and delaminating, and a close look at the front of the panels in the shade revealed extensive crazing of most of the panels. Now this with the JK BMS? I wonder what else is going to prematurely fail? The Lifepo4 cells? The solar charge controllers? Sorry guys, but I don't want to spend half my life monitoring my solar. What am I supposed to do, be engaged in a constant attempt to get warranty replacements and then having to reinstall everything back? You know, there is a value to time and so far my solar experience has cost me a lot more than it would of had I just stuck with the grid. Solar? Meh.
I will comment that I passed on buying a JK even though I wanted their active balancing and went with JBD. Because of some previous firmware issues reported with JK. It's important to use good hardware but more difficult to find a company that makes their firmware stability just as important. I think that Will was talking about this as a general problem with China brand products.
Hey Andy Maybe hit up Digital Mermaid she thinks all JK BMS has this flaw. I think she is gonna toss her JK's away and spend more money on other ones. I don't think she listened to you correctly can you set her straight. Thank you.
Andy, please help me understand this dangerous situation. What do you mean exactly with 'turn it off for some days' ? Do you mean disconnect all wires? Or use the switch to turn it off. This is a very stupid question, but I don't understand how this situation works.
nice news studio :). problem should be that firmware doesnt save current settings to the eeprom. should be easily fixable with firmware update (assuming all hardware connections are correct to the eeprom, which should be since you have updated firmware successfully).
Can't you just drain the power in the circuit and see it reset immediately? thought this was already known, yea it is pretty bad. The memory needs power to save, even SSDs lose data after not having power for a while =/
How did you even find this out? A charge controller would have to malfunction in order to over charge the battery pack! Unless the cells were way out of kilter, like way
Andy - genial gemacht. Du bist nicht nur ein toller Erklärbär, auch ein super Nachrichtensprecher 😂
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
Thanks a lot for all, greetings from at the river of Lahn in the midwest of Hessen. bleib gesund! Max
Andy, du bist der Knaller! Mal sehen, ob du für den Oscar nominiert wirst! Grüße aus der alten Heimat!
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.
Just Brilliant, thanks Andy, Andy 3 and Andy 4.
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
Andy, you start becoming a legend😂. If it wasn't for the bad news, great job in getting it across this way..hillarious
Nice to know. I bought yesterday two PB2A16S20P bmses :D
Agree that the BMS should not reset to a state that can cause catastrophic failure and go poopy in its pants as well as turning the Offgrid Garage into the Offgrid BBQ. In any process there should not be systems where there is only 1 safety. Hypothetically in this instance the charge controllers in both the Multiplus and the MPPTs should be set to limit maximum charge. I believe the Multiplus can also do an OVP disconnect as well, stopping the charge.
Hopefully JK react quickly and provide a solution. This should be written to CMOS memory on the BMS and should write your settings to memory that does not get overwritten in a power down event.
Too many Andy’s 😮 Got my head spinning. But the message got through and clear Andy 1, 2, 3 & 4!!! 😊
Brilliant presentation Andy! Ah well all of the Andy's.
Laughing laughing laughing! Very good "Report" on the News. Andy you are too funny. Scary development of the JK BMS. Nice production.
Merci pour cette vidéo. J'ai 2 BMS 200a que je devais installer demain sur mes 32 nouvelles cellules. Galère galère. 😕
Ich schmeiß mich weg. Das hast du super gemacht Andy. Da muss man beide👍👍 nach oben geben. Wenn es nur nicht so einen ernsten Hintergrund hätte. Sind halt Produkte aus China. Das erinnert mich an letztes Jahr. An die Sache mit den Microwechselrichtern und dem fehlenden Relais.👍
you are a fantastic director, writer and actor Andy ! :)
JK = Just Kidding, of course Perfect for the company
;) good one
😂 Beautiful, I love it. good info, Andy4.
Thanks 👍
Wunderbar, ich liebe Andy-Entertainment.
Von Andy2 würde ich mich aber mal endlich trennen ...
Andere wollen mehr von ihm😄
THANKS FOR THE WARNING and I have subscribed out of appreciation of your warning. (Referred from The Digital Mermaid)
PS. You Aussies are known by us Kiwis for horrible snakes and spiders.
I now see why Bugs don't stand a chance. Once again thanks!
I'm guessing some people have had this happen to know the problem is there. At 4.2 volts, I would guess Lifepo4 cells would expand and maybe push the tops off (explode) the cells and cause the cells to be in part or totally ruined. I would also guess that if cells expand, it could cause shorts and with heat, fires of flammable stuff around that heat. Would like to hear from anyone that had their cells charging at lithium ion voltages, what did it do to the cells?
Not only is a factory reset a terrible idea but it is made worse by the overvolt factory setting being so high. If the default was 3.5V this would be more a nuisance trip. The BMS would trip at high SoC before the charger shutoff. This would be "fail safe" in that while annoying it would alert the user of the issue in a safe manner. Combine "random" factory reset and the factory default being 4.2V is what makes this so dangerous.
News just coming in, a developer in China jumped out of a tall building this morning... Seriously, JK WFT... I can only guess this is an oversight in their rush to market a product.. At the very least the board should default to safe settings for all battery types... Or better still, charge and discharge mosfets off until programmed...
Hello Andy, please can you share in some text or Exel the Best setting value for jk with 16s 280ah?
Thanks you
Thanks OG News.
has this been fixed ?
just ordered one and its on its way.
that was a nice looking gentleman in the news artical lol
Hi,
This makes you wonder if you should trust solely on software for protecting agains possible disasters like this.
Perhaps some things should be backed up in hardware, old fashioned jumpers and parts dying at extreme circumstances. Thyristors set by physicsl jumpers can easily fix this I think. Most high class powersupplies use them as backup.
Leaving everything up to software may not be a good idea.
Even a basic seperate device could simply shortcircuit the supply and blow the fuse to prevent over voltage.
Andy.. this is an eye opener, thank you 👍🏼
Addendum:
A youtuber called Nate accidentally overcharged a pack to 3.85V and created balloons. Think what could happen at 4.2 volt while you are sleeping aboard or upstairs.
Does anyone know what firmware version the problem occurs with?
Or is the problem with all firmware versions?
Disturbing! I had done a power down a few days ago via the power button to change something but just for a few minutes. I did not disconnect the battery. I luckily have my Victron MPPT charge controllers set to 55.2 volt charge and the battery is very well balanced as well as it has been cloudy and only got one full charge in all this time. I just checked my settings this morning after seeing the community posts and all was well. I still have the old JK BMS and a "Peter" slave I can put in place. Question is, can I chain to the Venus OS and the Growatt inverter on the same CAN?
Andy,
Is that true with all JK bms’s or just the new one you have been testing? I have 24 volts system with the older 200 amp JK bms. It’s always on but now I’m worried that if it goes down for some reason, it will go back to factory settings. Do you know if it’s the same?
ok, I only clicked to see why Andy was wearing a suit!
what kind of BMS should I get ? I'm about to billed a Wheelchair ? I have JK K-B2A24S20P.
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!
Hello, I have been using the 14.15 in my test battery for some time now. It seems that the problem with losing the setting has been fixed in this version. Up to 12 hours even without power supply, the red cable disconnected, brings back the set values after switching on. I only use one Akku pack. Greetings
The BMS does not have a battery so a capacitor will be used to keep the setting. 12 hours is OK, but I guess is 2-5 days is possible. I'm sure it will fall back to the factory setting unless it uses non-volatile memory.
So Geil hab mich fast tot gelacht 😅
LOL!!!! Well done...
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?
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.
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!
-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?
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.
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!
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?
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
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!
Now the firmware / updated to 14.17 😊
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.
This is so dumb. All they would have to do is store settings in a partitioned Flash region on the micro-controller. Are they really storing this in RAM, or do they actively reset these values? In any case, should be easy to fix, but it shouldn't have been an issue in the first place.
Yeah, not sure how they did it. They weird part is, that the BMS is still connected to the battery, so still gets some power. The power button is really just a soft button.
@@OffGridGarageAustralia Someone in the comments mentioned that it doesn't happen with older versions of the firmware on this BMS - so should be an easy fix if so. Still, shouldn't have passed QA...
They told me to send new FW version tomorrow...so I am sure they can fix it easily via FW-update.
Well we tend to forget that at the end its a 200$ device guys ...
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.
I love it! You have a knack, Andy, for entertaining and educating at the same time. Well done!
Many thanks!
the owner a good looking "" lolololololol good one
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.
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.
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.
Oi vey....... How do the manufacturers not test this before sending the BMS's out into the wild......
It seems as if the settings are not stored in the CMOS, but in a memory, possibly buffered by a capacitor, which is deleted as soon as no more voltage is applied. Any reasonably knowledgeable tinkerer who has mastered the Arduino platform knows how to save settings in the CMOS that are retained even without a power supply. It's just a shame that a company delivers such a piece of crap.
I just checked by 150A JK Inverter BMS (none part of a live system yet as still awaiting battery shipment), it has been off since last Wednesday and all the settings still were as expected for LiFePO4 cells. How long before this reset happens ?
What FW are you running?
Mine has V14.13 and resets after 2/3 days.
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!
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 ??
Heya, oh wouw that is NOT GOOD, not good at all. I gues you all ready spoke to jk about this problem. and I'm very curious about what they think about this problem. and the next question will be even if they fix this how trust wordy they still are. w'll see what the future will bring
Hi Andy, you proved it: there ARE Germans with humor 🤣, maybe this is one of the reasons you left Germany being somewhat different? 😉.
I really like watching your videos but am missing just one: multiple RESS BMSses on one Cerbo.
For now I stay with my cellboard based flexible bms with hardware DIPswitches for cell balance voltage and stuff written in EPROM but these are way too expensive ( €600 for just one string of 18 batteries) and having the disadvantage of needing extra room, needed for each cell module hoovering above the cell poles....
Can you recommend me a BMS that's central, can control 16 (or maybe 18) LiFePO4 cells, has a balancing power of 1 or 2 Amps and works fine with 4 or five brothers together on a Cerbo (I ordered 40 extra LiFePO4 EVE LF280K cells and want to have 5 strings of 16 cells in parallel).
Suddenly I realize: it gets very lonely here......
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
I was afraid one of the off grid garage batteries actually started outgassing or something but it’s not that bad 😅 still indeed JK what are you doing.
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.
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!
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
Awesomeness ❤🤙 Just ordered a JK 8-24 100-200a.... My ANT shit itself after 3 months. Only running 100ah Eve LiFePo4 16s🤷♂️ Hopefully a firmware upgrade will sort out the new one🤞
Just can’t stop laughing, Andy! You have the gratitude of the whole community! God only knows who you just saved from a complete catastrophe.. Perhaps even someone’s life..
wow - Wow - WOWSER !
Thank YOU all "ANDREWS" one & ALL
COOP
the WiSeNhEiMeR from Richmond, Indiana, USA
...
Hello everybody after watching Andy‘s latest video on the JK BMS I am wondering does anybody know of a 48 V 16 S bms that would be best to use I’m going to use the GS0 230 amp hour 3.6 V cells and a must inverter 5000 W
It is very important to always monitor our system!
Thanks for drawing attention to it!
Funny login, I really liked it! :D
Was there no such problem with the older JK?
I use JK-BD6Axxx for 24V system.
Hi Andy thanks a lot for the works you have done and the info you share I just received today JK BMS JK-PB2A16S15P and i am asking myself if i should send it back and buy another brand ? what about Seplos BMS 3.0 my inverter is a Sofar solar one ? do you have any advise thanks
VERY Very "goodlooking" indeed!
-That reporter Andy3 dont look all too bright though... With his hat - and his nodding (typical reporter behavior)
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😄
Strange! A real factory reset disable charge and discharge in the control pannel... keeping safe but not functionnal battery.
It's happens every time i give the admin password to people gaming with their BMS like a new video game ... Oh what it happens if i click here, oh nothing! And here? Oh maybe i made a mistake, i will call my tech guy : "your BMS is not working anymore!" LOL
WOW Andy that is gross negligence on the part of JK, supposed to be an expert supplier (of mickey mouse kit?). As you say, the bms is a vital protective device. I am looking at the problem from first principles, ie back to basics. Do top balancing at the end of charge cut off at xS volts, switch cell all to parallel config so they soak and self balance, then switch back. All done by a bank of auto type DPDT relays - crude but simple, maybe only needs doing once/month, by manual triggered count down timer. Its what I am building, together with a string of isolated 3.5v psu boards , one for each cell, all switch on for charging.
Is this a stoopid idea? Isambard is my hero with his 6ft gauge rail system, way ahead of his time
Holy. Shit.
Yep, pretty much!
The Problem is, that this BMSes could be used for different Cell types, if there is only the one type LiFePo mode, the BMS can only fall back in LiFePo mode..... !
Keep it as simple as possible!
Its is not always a good practice, to develop one product, that fits for all the cases outside there!
Bashing "made in China" like you criticize Chinese while 95% of your equipment is made in China... 😅
This part is not usefull.
This is a new bms, many people have found that something do not work correctly and they informed you, you found nothing. This flaw can be dangerous... But not really in the end cause the overall voltage applied to the pack is safe anyway (reason to stay without any communication between bms and inverter as I always recommend), this is a flaw and it's good to warn people but the "having fun" on jk or Chinese product make you a smaller person cause in the end you are not smart enough to do better then their products.
Peter board... Peter board... what a joke.
There is a lot of junk out there and everyone is assuming that it will last. I have 3 solar systems for about 4 years and most of the equipment prematurely fails. Micro Inverters -failed. They were up on the roof and a huge problem to diagnose and replace. Well known brand of solar panels - junk. I finally realized that the drop in power generation was not due to cloudy days. Again, up on the roof and took them all off only to find junction boxes that had detached, the white backing sheet bubbling and delaminating, and a close look at the front of the panels in the shade revealed extensive crazing of most of the panels. Now this with the JK BMS? I wonder what else is going to prematurely fail? The Lifepo4 cells? The solar charge controllers? Sorry guys, but I don't want to spend half my life monitoring my solar. What am I supposed to do, be engaged in a constant attempt to get warranty replacements and then having to reinstall everything back? You know, there is a value to time and so far my solar experience has cost me a lot more than it would of had I just stuck with the grid. Solar? Meh.
I will comment that I passed on buying a JK even though I wanted their active balancing and went with JBD. Because of some previous firmware issues reported with JK. It's important to use good hardware but more difficult to find a company that makes their firmware stability just as important. I think that Will was talking about this as a general problem with China brand products.
Hey Andy Maybe hit up Digital Mermaid she thinks all JK BMS has this flaw. I think she is gonna toss her JK's away and spend more money on other ones. I don't think she listened to you correctly can you set her straight. Thank you.
I'm horrified by this new "feature". Has the problem been resolved in the meantime?
Hey Andy, does this issue affect the B2A8S30P models as well?
Andy, please help me understand this dangerous situation. What do you mean exactly with 'turn it off for some days' ? Do you mean disconnect all wires? Or use the switch to turn it off. This is a very stupid question, but I don't understand how this situation works.
Is this just with the onverter BMS?
Have JK rectified this issue, do you know?
Cheers
My old jk bms has lost his ability to turn off power...it is always supplying power to my inverter until 0 %
Thanks for the info! (I've also watched the video where they fixed this bug)
lol....best video EVER!!! Scarry Stuff.
Hi I was told that the factory has eliminated the problem through several updates, can anyone confirm this?
Thanks G.. Andy 1,2,3,4,5 still ok and with us on oith.... 😢😂😂😂😮😅😊
Andy, you are a legend!
I am so done with Chinese crap...
I don't understand why there is no viable and afortable alternative made in the west????
nice news studio :).
problem should be that firmware doesnt save current settings to the eeprom. should be easily fixable with firmware update (assuming all hardware connections are correct to the eeprom, which should be since you have updated firmware successfully).
AND as a safty barrier always default to the safest (lowest) charge end value
@@olafschermann1592that's not quite so easy. Allowing Li-ion to discharge to LiFePO4 levels would also be dangerous.
@@pau1phi11ips best action is dont enable charge or discharge until battery selected on default bms factory defaults.
Can't you just drain the power in the circuit and see it reset immediately? thought this was already known, yea it is pretty bad. The memory needs power to save, even SSDs lose data after not having power for a while =/
I have fw .14 on a 100A version, and it didn't reset after being off (via the power button) for 3-4 days.
How did you even find this out? A charge controller would have to malfunction in order to over charge the battery pack! Unless the cells were way out of kilter, like way