BMS Warning from Andy Off Grid Garage
- Thread starter Ralos
- Start date
Just seen it, so the latest JK BMS if turned off will after a couple of days lose the settings and revert to default settings. He confirms it affects all firmware versions based on tests he did last night. JK are now aware, Andy does not know if it firmware or hardware problem.
Quattrohead
Solar Wizard
These things are so not ready for real-world use it's not even funny.
Not ready for prime time. Just when I’m ready to possibly jump on one, another issue. This might be bigger than a software update.
SignatureSolarJames
Try Solar, the Grid will always take you back
The production value here is impressive
LithiumSolar
Solar Enthusiast
- Joined
- Nov 19, 2019
- Messages
- 177
Wow..... just wow..................
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
I saw Andy's Vid after I heard elsewhere as well... There was comment in the longer running JKBMS Inverter thread but got buried.
I've actually just stopped that part of my current order (ruckus stuckus frickus fruckus).
THIS IS REAL & SERIOUS... and it's a really dumb screw up no less, WTF were they thinking !
I've actually just stopped that part of my current order (ruckus stuckus frickus fruckus).
THIS IS REAL & SERIOUS... and it's a really dumb screw up no less, WTF were they thinking !
Yeah. It would suck turning your system on after a detailed config/effort and it destroys many AH if batteries…or worse.
The user community following the Off-Grid Garage forum has discovered a serious problem with a model of the JK BMS that could result in catastrophic battery failure. Details are here:
More here:
News from Off-Grid Garage; Dangerous JK BMS Flaw
Major safety concern with new JK Inverter BMS! Not good.
For those of you who aren't familiar with Andy's sense of humor: he his deadly serious!More here:
News from Off-Grid Garage; Dangerous JK BMS Flaw
Sverige
A Brit in Sweden
Any chance of a quick summary explanation please, so we don’t all have to watch the video?
BMS Warning from Andy Off Grid Garage
Andy from Off Grid Garage just posted a safety warning on his YT channel regarding a BMS invertor settings. Just wanted to share
diysolarforum.com
LithiumSolar
Solar Enthusiast
- Joined
- Nov 19, 2019
- Messages
- 177
It apparently loses programmed settings if it's turned off for a few days and reverts to a different voltage profile.
Sverige
A Brit in Sweden
Ok thanks. Makes you wonder how (if) these products get tested before firmware is released.
It didn't do this with earlier versions of the firmware on this BMS (someone in the comments reported that), so it likely is just a SW update away from a fix.
I merged both threads on this topic.
Correct. The upper voltage per cell cutoff threshold reverts to 4.2 volts as opposed to 3.65 volts. 4.2 volts will, at the very least, ruin LiFePO4 cells.
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
CLARITY ! on the FLAW !
The BMS once setup & configured, the settings will remain until the BMS is Powered OFF.
After being restarted, it restores the BMS FACTORY DEFAULTS which uses Liion Chemistry by default... *
That Default setting allows charging to 4.200 Volts per cells which is BAD for LFP !
IT IS NOT THE MASSIVE CRISIS SOME ARE CLUCKING UP ! The Batteries WILL NOT EXPLODE & destroy the neighbourhood !
They would swell, reach higher than normal temps and very likely Vent if that charge stays too long.
YES it can damage the cells within a pack and make them unuseable.
*Default Chemistry should be the one that cannot harm any of the supported chemistries and THAT is LFP as that profile is pretty much "within" the values for the other chemistries.
Is it Hardware or Firmware ?
Apparently some previous Firmware Versions saved the set Profile but not the most recent update.
If above is correct, it's not a hardware fault.
Their PC Software is also Buggy but improving, it actually does not save setting to BMS NVRAM, as shown by a few.
It also lacks saving "profiles" to disk and allowing a person to upload said profile to each BMS in a bank.. Derp for lacking that.
The BIGGEST POINT: Is their Quality Control & Assurance testing is obviously QUESTIONABLE.
Software issues through their history... Apps & BMS firmware (why have logs if they are not rolling and only take 50 Entries before locking.)
Hardware Issues with the switches & screens and more... Seriously, this is typical stuff to test/verify BEFORE letting anything out the door.
BTW: FIND A BMS that is always 100% perfect - Even the premium Battrium's and other Big Buck Commercial models also have quirks BUT most are not potentially fatal to the attached gear.
The BMS once setup & configured, the settings will remain until the BMS is Powered OFF.
After being restarted, it restores the BMS FACTORY DEFAULTS which uses Liion Chemistry by default... *
That Default setting allows charging to 4.200 Volts per cells which is BAD for LFP !
IT IS NOT THE MASSIVE CRISIS SOME ARE CLUCKING UP ! The Batteries WILL NOT EXPLODE & destroy the neighbourhood !
They would swell, reach higher than normal temps and very likely Vent if that charge stays too long.
YES it can damage the cells within a pack and make them unuseable.
*Default Chemistry should be the one that cannot harm any of the supported chemistries and THAT is LFP as that profile is pretty much "within" the values for the other chemistries.
Is it Hardware or Firmware ?
Apparently some previous Firmware Versions saved the set Profile but not the most recent update.
If above is correct, it's not a hardware fault.
Their PC Software is also Buggy but improving, it actually does not save setting to BMS NVRAM, as shown by a few.
It also lacks saving "profiles" to disk and allowing a person to upload said profile to each BMS in a bank.. Derp for lacking that.
The BIGGEST POINT: Is their Quality Control & Assurance testing is obviously QUESTIONABLE.
Software issues through their history... Apps & BMS firmware (why have logs if they are not rolling and only take 50 Entries before locking.)
Hardware Issues with the switches & screens and more... Seriously, this is typical stuff to test/verify BEFORE letting anything out the door.
BTW: FIND A BMS that is always 100% perfect - Even the premium Battrium's and other Big Buck Commercial models also have quirks BUT most are not potentially fatal to the attached gear.
Quattrohead
Solar Wizard
Time to outsource your video production to Australia !!!
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