Don't stop starting the videos looking outside. The few you haven't, I was like hey, what's the weather!?!?! I mean you kinda have a solar power channel so it makes sense to start with the sky!
Wow, JK should be absolutely amazed with all bugs you are finding within a whim. Take a breath, calibrate a SPAT and let's hope JK watches (and understand all "not good"'s. Frohe Weinachten und ein guten rutsch im neuen jahr 🎉
Amperage resolutions can push the ADC. +/-250A = 500A range. @ 8 bits it would be 1.9A resolution. @ 10 bits it would be 0.49A resolution. And @ 12 bits it would be 0.12A resolution. 500 / 256.0 (8 bit), 500 / 1024.0 (10 bit), and 500 / 4096.0 (12 bit).
They are other ways like op-amps circiuts with variable gain, or ready to go 16bit integrated ic for shunt measurements, you simply puts external shunt and it works , ect,etc someone just did not make his best when doing this
@@tomaszszczepaniak2101 If you want to double the build cost and calibrate a variable gain op-amp circuit, sure. Otherwise, no. 100% of designers will choose "no" for a product like this. Seriously. These types of products will almost universally use the ADC built into the micro-controller rather than a discrete ADC chip. 8 and 10 bits is easy. 12 bits exists but is less common. At some point getting higher accuracy cheaply requires switching from SAR to Sigma-delta. Things can get messy very quickly at higher ADC resolutions. Going higher than 12 bits, fully calibrated, generally adds too much expense for a product like this. Same thing for the op-amps. A simple level-shifter and fixed-ratio amplifier is just a few parts. Like 5 or 6. Two fixed-ratio channels would run 10-12 parts. The instant you try to get more fancy than that you will end up with 20 parts and still not be done with the design. Doing more than the basics quickly makes a device like this too expensive to be able to compete in the market. -Matt
Variable gain op amp is op amp with like 3 resistor and one connection to mcu processor its less than 0.1$ . They should do it , becouse soc is roc stable when 0.3A load exist
Generaly i understand your point of view and as person who work in embeded i understand what you say and why its like this, but as a customer i will complain , it don't work good enought for 200$ bms ;)
@@tomaszszczepaniak2101 You can't control the impedence of the micro-controller's I/O pin when trying to pull-down to create the resistor tree, plus there is leakage on the resistors that are "off", plus the microcontroller's output won't pull all the way down to ground. So at a minimum you would need N-channel FETs hanging off the resistors and then control the FETs from the microcontroller. As I said, calibration becomes a problem. Actually not just calibration, but also temperature compensation. They both become huge problems. I guess level shifting isn't required for a shunt since the battery cabling for the shunt is ground-referenced. But since current has to be measured in both directions, you would need two op-amp circuits at a minimum (one for each direction) to avoid having to generate a negative supply. -Matt
So Andy connected jk in paralel , did jk swap. I have a question for everyone. Can we sonnect jk in series to be used as replacement for server rack HV battery? Acctualy which bms is in in all thise HV connected server racks?
Heya, nice test again thanks. still in the market for 3 BMS's hope they will upgrade the software for parralleling batteries soon. can't wait for the next test.
It's really cool that you do the tests... Comparison.. and all but I prefer a much more simple approach. The complicated computer communication is just way to much effort
You need a new (temporarily) sign : JK's Headquarter of Quality Control It feels like they have not really done their job, the development of the windows software and the quality control that builds the releases. it seems like you touch a topic and a bug jumps out of the screen into your focus / eyes Luckily it is more or less fixable and nothing burnt into a rom which would require a chip exchange, just software or maybe firmware. I still hope that this will be our next BMS cause I have more or less given up that SEPLOS will get their BMS right, which will mean I will have to add a Neey active balancer sooner or later depending on how long the new grade A cells stay so close together with a deviation of 0,005V - huge difference to the previous grade B lasered cells from EVE. in 1 year we should have a bigger deviation after 200 to 240 charge cycles. And I can not wait to see the whole system with the peter board working and the progress of the general DIY battery build market cause you are pushing on everyone hard to get things done and deliver running hard- and software that should work flawlessly. Quite a long journey you had embarked to. The whole market of DIY builts and blueprints is shifting and more and more are pointing or linking to your channel. Hats off! Hopefully SEPLOS is listening and watching how far ahead the competition has pushed and that they finally neeed to catch up, not only working on the hardware improvement, but also on the whole system performance and issues. I can not really recommend the SEPLOS BMS anymore even though 1 year ago JK had nothing which came close to an inverter BMS (cause I had bought back then their CANBUS edition which was not capable at all, I mean running with a growatt inverter for example). And now it has flipped, JK far ahead of SEPLOS in such a short time and I bet SEPLOS is falling even more behind considering the progress JK has achieved since summer.
Hallo Andy Merry Christmas für dich und deine Familie und schöne Feiertage vielen Dank für deine tollen Beiträge Videos finde ich immer sehr interessant ich habe jetzt einiges sehr gut davon gebrauchen können und es hat mir sehr geholfen. Viele Grüße Wolfgang
Ah and Andy - coud you please test the calibration like calibrating at 10A and then going up to 30A for example? Also on dicharging please! Have a wonderful Weihnachten erstmal! VG Hannes
Hi, i have Three JK-PB2A16S15P (v14.19) in parallel, but on the Cerbo I see that they keep losing the connection to each other, sometimes only one, two or all three are displayed.
hi, there i have jk bms and i was trying to connect via usb on desktop?laptop , did`t recive any data from bms . There is any way how i can make thi to work , any advice will be much apricieted .Thanks
Good morning mister. Maybe you can help me with my issue. I have two batteries one deye rwm6.1 and seccond which I made is lifepo4 280Ah 16s. I TSH which I made myself I use jk BMS pb2a16s20p. Maybe you know how to make connectio between the batteries and my inverter deye 12kW hybrid? I'm be very appropriate. Thx.
merry christmas andy .. a funny fact is that 0.7 amps for the 200 amp bms wont get detected as charge and i thought the funny fact that 0.7 amps for almost 300 amp bank wont even charge it!!! i think it can just co exist as a tiny current !!! wishes for a happy new year too no point of waiting 5 days
Hi Andy,and thanks again for this video..Andy i just want ask you (and i'm not remenber if you said it in your previous video?) the last version of the software with new setting added,match only with the "inverter BMS" or can match also with the previous BMS model (like the black one) Thanks.
Hi Andy, another big JK software problem in parallel BMS: As you showed us in VenusOS/Cerbo under BMS/Details the number of BMS / batterypack is missing. As you said, this is NOT GOOD. But that's only the tip of the iceberg. My experiments show me that only voltages and temperatures of BMS #0 (the master with the CAN uplink) are transferred to Victron, no values from any other JK BMS (slaves) 😧 That's not bad, that's ugly. If cell voltages or temperatures of the other BMS / battery packs are running out of the secure range, Victron doesn't get the information, cannot for example ramp down the MPPT current. Can you cross check my results and if you confirm that, report this big bug to JK. Thank you for your great work 👍🍻 PS: I would be happy, if I made a mistake.
Hi Andy I have a quick question for you, my system has been built up over a few years now I have inverters to charge batteries and charge controllers of different makes none of which are victron would you bother to communicate with the inverters to charge or just set all the charge voltages the same as I have and call it done
II think I seen one of the battery 100% SOC at 3.1V is why it showed 100% every time you click in battery type it resets a lot of settings. I found that out way back when I was first configuring mine.
It would be great to have one tab or one window with multiple views of all batteries connected in parallel, even if there are 2 or 15 of them. (The Sun Fun Kits V5 BMS app has a very nicely done multiple view in one window of their 12V batteries connected in parallel or series). It would also be great to be able to set up a Master BMS and simply have the possibility to propagate all the settings for all batteries connected in parallel at the one click of a Propagate BMS Settings button.
Hmm. Well, to display the SOC for all the batteries the Victron would have to do a weighted average based on the Ah capacity and SOC of each battery. The question is... does that make sense? What does the human operator expect? What should the behavior be if one battery was in a failed or manually disconnected state? That brings up the question, what does the user use the SOC display for? Determining how close the bank is to empty or how close the bank is to fully charged would be a common human desire in which case we would want the Victron to discount a failed or disconnected battery for displaying that value. That could get confusing pretty quickly for the human reading the value and wondering what it means. I would say there is no ideal solution and displaying just the master battery SOC is probably reasonable. Particularly since under normal operation the SOC's for all the batteries will be within 10% of each other even with size differences mixed together. -Matt
You leave the garage door open but there are no bugs flying around the lights or mosquitos. Also it’s hot, but you don’t sweat much, your garage only has fans? Are you an AI?
Hello Andy great seeing your videos. Keep looking at the sky. Question, have you ever heard of a 16s cells going to zero volts. All cells suddenly are at zero and after 3 to 5 hours later it goes to normal. Next day the same thing happens. Its a daly 100A. I've had this to over 1 year now. Thanks
thank you handy I have a discussion on whatsapp with 3 engineers but the problem is that he doesn't respond all the time!!! They don't really understand!!!@@OffGridGarageAustralia
If the device ID is 0000 you can only connect via the RS495 inverter port. All other addresses, you need to connect to the RS485-1 or -2. My BMS is completely bricked and does nothing any more.
So, is this it chief? I need to order some batteries and JK ticks the right boxes but also our Asian friends do not really have the battery boxes ready for the JK BMS.
Apexium told me they might develop a face plate for the jk inverter bms with touch display. The box is 105$ + shipping at the moment (not yet for the new JK)
Yes, the shipping is the killer but that is part of ordering stuff overseas. The boxes themselves are reasonable priced considering the BMS is $200-250. I was thinking of trying to find a metal fabricator but I highly doubt any in my area would fabricate a few with similar specs for less. Some of the shipping quotes I got was only $335 US for 4 boxes (no cells).
You were actually wrong about the SOC story... You put in the A (master) BMS 280Ah capacity at 72% SOC , in the B (slave) BMS 20Ah capacity at 100% SOC , and if you summarize it, you get actually the 73% SOC :) so its correct! Please try it again, but with different capacity and you will see.
That was only fixed with the newer firmware. With the older ones, it did not work. JK has reacted fast and added this to an update after the video released.
But why doing it ? When battery hit desired charge voltage current will drop by its own , it will slowly go down , If you think about parrel battery and one geting more current becouse one is charged, it's not a problem since they are parrel. It means that all will hit desired voltage at the same time , and all will decrease its charging current at its own
@@tomaszszczepaniak2101 because I’m using Solis inverter, and if I set the charge current in bms 100A, the bms is sending by CAN 100A for ever, it doesn’t matter is it 80, 90 or 100% charger. If you think this is normal, you have no idea how cells are working
@@gosmartUkrainehave you ever charged battery ? If you set 100A it wont charge 100A when you are at top voltage , if battery gets charged its internal resistance goes up. Higher resistance means higher voltage to maintain the same curren , if voltage constant , current will go down on its own as battery is closer to 100% soc at given voltage
@@OffGridGarageAustralia I know there is already a clip on this topic, can you make a short clip with the connection between jk bms 4/8s and cerbo gx using the first method (the simple one). Thanks for all the information and happy holidays
You say they need to enable you to download the settings in a file so you can import them into the others. But the only reason for such a comment is that that is the way of the others. Wouldn't it make far more sense to say in the software, "push these settings to all slaves"? And of course have a USB connection for the PC.
It seems to show the percentages in the parallel Ah (total and remaining) - kind of funny fail for a professional manufacturer 😂😂 Regarding the SoC: It mus be an average or better the real calculated SoC (sum of all remaining Ah divided by sum of all total Ah) If you just paralleled packs with different SoCs, there could be a huge difference. In some cases there could be huge difference as well over time - different iR or cable lengths or diameter. Which is absolutely no problem in production environment...
I found one of my BMSs is still virgin at V14.03. I will update it with version by version to see from which version it looses its settings when switched off.
Hi Andy. In terms of the aggregated battery capacity. I think the best calculation would be for JK to use the weighted average of the battery packs. If the battery packs are a different capacity, then their SOC could indeed be different, but their voltages the same as they are connected in parallel. I think using the weighted average calculation is the most accurate for connecting different capacity batteries in parallel.
Yup, definitely want to weigh SoC based on battery size for averaging purposes. Or even better: just calculate overall SoC based on the sum of available kWh divided by total storage.
Another Great Video Andy. You have verified my own finding. I have 2 of the 200A JK units. It only shows the Soc of the master to Victron. But I have over time noticed three issues.... 1. The PC software Suck Donkey B.... it doesnt show the correct battery into as you have found and you also cant change the Uart / Can protocol from the PC. Thanks goodness for the BT app. 2. A power cycle of the BMS looses all settings and you need to start over.. In the last video one of the last things you did after setting up the BMS in the Jaki was to power it off, hence this time all your capacity and voltages are out. 3. I have found the parallel to be a bit flaky. I have had several instances over the course of the past 2 weeks where the slave BMS drops off and Vic only shows the fata from the master. On the main screen of the BMS their is a value bottom right PCL:OFF. Helen Tells me this should be ON for parallel communications link, but cant tell me how to get it to turn on. There is a slide switch to disable it but nothing to turn it on.....Crickets since I reported this back. I have found one other issue with the RCV and Float voltage. When my batteries got to the RCV and then changed to the float value the Victron through up an over voltage alarm from the BMS and triggered the Freq to 53hz so the Fronius Solar wouldn't charge anymore. it held this well below the 53v I had set and I eventually intervened and turned off the float swicth in the BMS and all was good again,. Over all I am happy and I am confident enough that JK will sort out the issues in time, Hopefully issue 2 first, 3 second, then 1. As always enjoy the SPATS and xmas looking forward to some excellent vids in 2024. Ty H.
@tyweb9264 So you were told that the PCL (Parallel Communications Link) should be on when paralleling batteries? I wish there was instructions somewhere. I have 4 of the new JK BMS 200a with the version 15. Who is Helen?
@@Braebyrn Hi Sorry for the late reply. Helen is the JKBMS lady I have been talking with on the support line. Yes I have upgraded my firmware to 14.20 a couple of days agao, and whilst the PCL is still showing as off, they seem to be working as a pair just fine. But I havnt been able to monitor it 100%
Hence the can connected bmses I d day. Why still use the Victron shunt? Should be as you said. Maybe add a nice color screen. Possibly already in Home Assistant and not in Victron is?
I was looking at cases that use the JBD bms and JBD seems to using the same communications board as the JK bms. However, on the JBD case the communications board is rotated 180 degrees (upside down from how Pace mounts it). If JK is copying that, then I can see why setting location 1 is set by moving the right switch on that DIP switch instead of the left switch.
I think this could be important: Charging Settings should copy to slaves in case of the Master fails. (If the lowest ID becomes the master then… or only 0 is a master? Which would be a single point of failure) If the 200A version can’t see less than 0.8A the victron system still knows what it pulls, correct ? So SoC might be not correct but maybe better that shared current is not activated with this BMS
Awesome job and always appreciate the diligence you provide. My question is, how many of these BMS’s can be paralleled? I’ve have six DIY 16s LiFePo4 packs. Does each additional BMS paralleled RS485 back to the master? Or daisy chain slave to slave back to master?
Hi Andy! Thanks for all your videos, I discovered your channel recently and I'm learning a lot thanks to you! I have a project to assemble two 4S batteries that I would like to put in parallel. I was wondering if it was possible to put two 4S compatible JKBMS in parallel? Or are there other brands of 4S BMS that can be paralleled?
Can I connect two 24v batteries in series to get 48v. I have 2 batteries made of 8s EVE 304ah using two JK 4s8s 200amp BMS. I wish I had bought 8s20s version. Now connected as parallel as I have 24v inverter. However now I got solis hybrid inverter which accepts 48v battery. Moreover, how can I get these two JK BMS communicate with each other and the inverter.
Due to the wonkyness of JK I've had my battery builds on hold for over a year trying to figure out the issues with the various JK bms' I've purchased/installed. I tried to figure the issue from a logical standpoint and am still conflicted. The programmers at JK use some logic I'm not familiar with. And due to that I've been waiting for them or someone at another manufacturer to come up with a bms that doesn't use 'pretzel-logic'. It's very disheartening as a one off type buyer to continue to have to replace components and wait for deliveries. I often wonder how the makers of power stations, cope with this. Probably pallets of returns is my guess. I realize these are complex devices, but not enough quality control being used?*!
😅I wish they would package the software for Linux. Really just put out an rpm or deb file, it’s so easy and I am guessing they are developing on Linux anyway.
Hi Andy, Good video thank you. Mine has version15:5 and when I do exactly as you show and I select the software 15:10 for the JKPB2A-15S-15P which of course is what mine is, it just says "Device identify is not same as connected device!?? In fact I tried all four of the versions in case there was a different type in this box, same result with all. I have to update the firmware as 15:5 loses all the settings when you switch it off, has anyone the same problem and if so is there an answer please?
If i have two batteries and two JK 200a BMS connected to one inverter, in master and slave configuration - Can I draw up to 400 amps from the batteries in total? Or, is it limited to the max amps of the master bms, i.e. 200 amps total from both batteries?
I just took the 14.15 test, still bad, it’s Chinese!!! on the master bms I mark 3.00v soc zero it marks zero I do the same thing on the slave and no it is decent below 3.00v and does not switch to zero it's incredible!!!
What is this green port written dct on communication plate? Is it dry contacts? If it is then what is itsfunctiolity of it? Does it really work in this bms? Kinly make video on its functions.
@@OffGridGarageAustralia Is it advisable to parallel two lifepo4 battery packs with different BMS brands without linking the RS485 ports? just to increase the capacity of my ESS.
Frankly I do not see the big advantage of all this hassle, I did not connected the bms to the cerbo cause I prefer those systems to be independant, bms is for me, part of the battery and the only one able to decide on how to protect cells. It's safe and efficient. I got 2 pack in parallel with old jkbms on both, one pack is outside and the other inside the house. Sometimes the outside one disconnect charge (under 5°C) then reconnect later and even then the balancing current is not insane... All work fine.
Nope, state of charge per battery weighted by capacity (charded enery by battery), then calculating the charged capacity and set it in relation to the total capacity of all batteries. That would be the exact SOC of the whole system.
Its probably just picking out the wrong field from the data packet on that "100AH" display on the PC. I also like how the voltage gauge goes all the way to 200V and the needle obscures the value display.
@@BobDevV The Victron will have a maximum amperage setting separate from all the BMS monitoring as well. Obviously that would be set to what the wiring, breakers, fusing, and devices can actually handle regardless of what the batteries themselves can handle. You are making an incorrect assumption about the shunt. If you look at Victron's product line-up, their smart shunts are 500A, 1000A, or 2000A. The smallest offering Victron has is the 500A shunt. Most people will be limited by the wiring they choose, not the shunt. In anycase, one always has breakers and fusing for the capabilities of the wiring, including the shunts. Whatever the worst-case winds up being, if you make a configuration mistake, you blow a fuse or trip a breaker. Nothing actually fries. For example, I have three batteries in parallel for 200Ah @ 51.2V, capable of discharging or charging 200A continuously and bursting for 400A. Great. But my cabling is 2 AWG so the actual maximum amperage is only 115A. My fusing is 100A and I have an 80A master breaker because my current system doesn't have the ability to charge or discharge more than 60A anyway. If I had a setup where the Victrons were under a centralized control system, I would thus set the global amperage limit to 60A. -Matt
I hope they are paying you well to test their sh1tty software! Is it just me, or does it seem like the JK hardware engineers don’t talk to the software engineers?
Im looking for an nice housing/enclosrue that fits 16x 280Ah cells and this new JK BMS. Anyone experiences and/or recommendations? I'm not really looking for a box including BMS, as that is just waste of money.
Hi Andy & community and thanks for this long waited test. I have complete new setup build with two (2) JK-PB2A16S-20P, (200A, with 2A balancer). Ordered them also among first ones when those became available. Both of them seems to be working via bluetooth OK (8S config). Both of them stand on V14.03 software version while hardware appear to be V14.XA. Bought also RS485 (USB to RJ45) module for the firmware updates. Managed to install it OK to my laptop. At least I think so. The problem is that there is no way I can connect these BMS's to laptop through latest JK PC software, it just simply dont bring anything on the screen even the module light is flashing, so likely "something" is happening. COM port should be OK as well as well as device ID. So I have now a bit questionmark if the issue is on the RS485 module (first time ever I use that) or do I have two similar faulty JK-PB2A16S-20P's as you Andy seems to also have. Honestly I have no idea what to do next, obviously I cannot stay on 14.03 version. Is there actually anybody who could confirm success on updating software for 200A, 2A version? UART1 protocol No. = 0 (if trying to change as 1, it will give "sending failure" message on bluetooth app.) UART2 Protocol No. = 1 CAN Protocol No. = 0 Any ideas?
Hi, I love your videos. They are great and very helpful. Do you have any information whether this JK invertor BMS can co-work with Victron Multiplus correctly with multiple parallel battery banks with own BMS ?
Hi Andy, Thanks for your very informative videos. I need a Bms capable of 400a max. Would i be able to achieve this by using 2x JK 200a BMS. I have 2 6s packs so could run 1 bms per pack and draw 400a right?
Andy Example You load the 2 BMS 100% and even voltage you will discharge you will see that the BMS Maitre Decharge + 20% Pare relations to the slave on my 2 bms seplos never I had this concern !!! He does not convince at all !!!
Hello Andy, thanks for the great videos about the new JK. Will this JK-BMS also work with RS485, did anyone test this? I don't want to install a CANHat on my RasPi if not necessary.
Hi Andy for your BMS problem block on request to JK a Provision Code to reinject it and it should go after your test it is not push because if you leave the 2 bms in // what days you will realize who sinceronizes more in upload and which loads the same thing it deregles and come back to factory alone tell me if you have seen that !!!! THANKS😂
Don't stop starting the videos looking outside. The few you haven't, I was like hey, what's the weather!?!?! I mean you kinda have a solar power channel so it makes sense to start with the sky!
Pull up the app and look how much Watt the panels generates kinda same nah
@@Amsterdamsco huh?
Always the finger in the wounds...perfect Andy, you will make them make the perfect BMS eventually ;)
Wow, JK should be absolutely amazed with all bugs you are finding within a whim. Take a breath, calibrate a SPAT and let's hope JK watches (and understand all "not good"'s. Frohe Weinachten und ein guten rutsch im neuen jahr 🎉
Amperage resolutions can push the ADC. +/-250A = 500A range. @ 8 bits it would be 1.9A resolution. @ 10 bits it would be 0.49A resolution. And @ 12 bits it would be 0.12A resolution. 500 / 256.0 (8 bit), 500 / 1024.0 (10 bit), and 500 / 4096.0 (12 bit).
They are other ways like op-amps circiuts with variable gain, or ready to go 16bit integrated ic for shunt measurements, you simply puts external shunt and it works , ect,etc someone just did not make his best when doing this
@@tomaszszczepaniak2101 If you want to double the build cost and calibrate a variable gain op-amp circuit, sure. Otherwise, no. 100% of designers will choose "no" for a product like this. Seriously.
These types of products will almost universally use the ADC built into the micro-controller rather than a discrete ADC chip. 8 and 10 bits is easy. 12 bits exists but is less common. At some point getting higher accuracy cheaply requires switching from SAR to Sigma-delta. Things can get messy very quickly at higher ADC resolutions.
Going higher than 12 bits, fully calibrated, generally adds too much expense for a product like this.
Same thing for the op-amps. A simple level-shifter and fixed-ratio amplifier is just a few parts. Like 5 or 6. Two fixed-ratio channels would run 10-12 parts. The instant you try to get more fancy than that you will end up with 20 parts and still not be done with the design.
Doing more than the basics quickly makes a device like this too expensive to be able to compete in the market.
-Matt
Variable gain op amp is op amp with like 3 resistor and one connection to mcu processor its less than 0.1$ . They should do it , becouse soc is roc stable when 0.3A load exist
Generaly i understand your point of view and as person who work in embeded i understand what you say and why its like this, but as a customer i will complain , it don't work good enought for 200$ bms ;)
@@tomaszszczepaniak2101 You can't control the impedence of the micro-controller's I/O pin when trying to pull-down to create the resistor tree, plus there is leakage on the resistors that are "off", plus the microcontroller's output won't pull all the way down to ground. So at a minimum you would need N-channel FETs hanging off the resistors and then control the FETs from the microcontroller.
As I said, calibration becomes a problem. Actually not just calibration, but also temperature compensation. They both become huge problems.
I guess level shifting isn't required for a shunt since the battery cabling for the shunt is ground-referenced. But since current has to be measured in both directions, you would need two op-amp circuits at a minimum (one for each direction) to avoid having to generate a negative supply.
-Matt
So Andy connected jk in paralel , did jk swap.
I have a question for everyone. Can we sonnect jk in series to be used as replacement for server rack HV battery?
Acctualy which bms is in in all thise HV connected server racks?
❤great question!
Good question!
Wondering about same thing..
The highest in the Grove was Sunday 36.4C, cooler today 28C!
EEL now offers their new V3 battery-box with the JK-Inverter-BMS included - i think other Brands will follow soon.
Very nice ! 🐸🐸🐸
Heya, nice test again thanks. still in the market for 3 BMS's hope they will upgrade the software for parralleling batteries soon. can't wait for the next test.
It's really cool that you do the tests... Comparison.. and all but I prefer a much more simple approach. The complicated computer communication is just way to much effort
About the state of charge, It should make his own calculation with the reported remaining and total capacity
You need a new (temporarily) sign : JK's Headquarter of Quality Control
It feels like they have not really done their job, the development of the windows software and the quality control that builds the releases.
it seems like you touch a topic and a bug jumps out of the screen into your focus / eyes
Luckily it is more or less fixable and nothing burnt into a rom which would require a chip exchange, just software or maybe firmware.
I still hope that this will be our next BMS cause I have more or less given up that SEPLOS will get their BMS right, which will mean I will have to add a Neey active balancer sooner or later depending on how long the new grade A cells stay so close together with a deviation of 0,005V - huge difference to the previous grade B lasered cells from EVE.
in 1 year we should have a bigger deviation after 200 to 240 charge cycles.
And I can not wait to see the whole system with the peter board working and the progress of the general DIY battery build market cause you are pushing on everyone hard to get things done and deliver running hard- and software that should work flawlessly. Quite a long journey you had embarked to.
The whole market of DIY builts and blueprints is shifting and more and more are pointing or linking to your channel.
Hats off!
Hopefully SEPLOS is listening and watching how far ahead the competition has pushed and that they finally neeed to catch up, not only working on the hardware improvement, but also on the whole system performance and issues. I can not really recommend the SEPLOS BMS anymore even though 1 year ago JK had nothing which came close to an inverter BMS (cause I had bought back then their CANBUS edition which was not capable at all, I mean running with a growatt inverter for example).
And now it has flipped, JK far ahead of SEPLOS in such a short time and I bet SEPLOS is falling even more behind considering the progress JK has achieved since summer.
Hi Andy, is there no switch or button on the BMS for a kind of factory reset. So you can try to update it again?
Hallo Andy Merry Christmas für dich und deine Familie und schöne Feiertage vielen Dank für deine tollen Beiträge Videos finde ich immer sehr interessant ich habe jetzt einiges sehr gut davon gebrauchen können und es hat mir sehr geholfen.
Viele Grüße Wolfgang
Ah and Andy - coud you please test the calibration like calibrating at 10A and then going up to 30A for example?
Also on dicharging please!
Have a wonderful Weihnachten erstmal!
VG Hannes
Sure, will do! More testing coming...
Good morning.
I have 3 BMS JK-BP2A16S-20P.
I set them to 0000 1000 and 0100.
I connected the RJ45s but I can't get them to communicate together
Hi, i have Three JK-PB2A16S15P (v14.19) in parallel, but on the Cerbo I see that they keep losing the connection to each other, sometimes only one, two or all three are displayed.
Is it possible to connect in parallel another models of JK BMS i.e. B1A8S20P, using CAN/RS485 3/4 pin connectors on it?
Hi ! Great job.... Well done Andy....
Hi Andy,
Can you do a video on battery fire prevention including best fire extinguisher for lifepo4 battery and any fire prevention steps.
Thaks
Hallo tolles Video , habe eine Frage , welches Kabel Typ A ? Hast du vom jk bms zum cerbo gx genommen liebe Grüße aus Rot am See Andi Schindler
hi, there i have jk bms and i was trying to connect via usb on desktop?laptop , did`t recive any data from bms .
There is any way how i can make thi to work , any advice will be much apricieted .Thanks
Could you ask JK to have the BMS to have a web server for control and this then would not need any remote software.
Will the SOC decrease in winter time even there is no current flowing? Or does it need to trigger the 0% SOC voltage?
Good morning mister. Maybe you can help me with my issue. I have two batteries one deye rwm6.1 and seccond which I made is lifepo4 280Ah 16s.
I TSH which I made myself I use jk BMS pb2a16s20p. Maybe you know how to make connectio between the batteries and my inverter deye 12kW hybrid?
I'm be very appropriate. Thx.
I have installed two and have three more to go. Thank you so much for all your help. Awesome Work!
Thanks a lot for your feedback, contribution and support!
merry christmas andy .. a funny fact is that 0.7 amps for the 200 amp bms wont get detected as charge and i thought the funny fact that 0.7 amps for almost 300 amp bank wont even charge it!!! i think it can just co exist as a tiny current !!! wishes for a happy new year too no point of waiting 5 days
Hi Andy,and thanks again for this video..Andy i just want ask you (and i'm not remenber if you said it in your previous video?) the last version of the software with new setting added,match only with the "inverter BMS" or can match also with the previous BMS model (like the black one) Thanks.
Voltage gauge from zero to 200V in the PC-App.
Also gib ihm. 😂
Frohe Weihnachten, Andy.
Hi Andy, another big JK software problem in parallel BMS: As you showed us in VenusOS/Cerbo under BMS/Details the number of BMS / batterypack is missing. As you said, this is NOT GOOD. But that's only the tip of the iceberg. My experiments show me that only voltages and temperatures of BMS #0 (the master with the CAN uplink) are transferred to Victron, no values from any other JK BMS (slaves) 😧 That's not bad, that's ugly. If cell voltages or temperatures of the other BMS / battery packs are running out of the secure range, Victron doesn't get the information, cannot for example ramp down the MPPT current.
Can you cross check my results and if you confirm that, report this big bug to JK. Thank you for your great work 👍🍻
PS: I would be happy, if I made a mistake.
Thanks Andy, Merry Christmas
Merry Christmas🎄
Hi Andy I have a quick question for you, my system has been built up over a few years now I have inverters to charge batteries and charge controllers of different makes none of which are victron would you bother to communicate with the inverters to charge or just set all the charge voltages the same as I have and call it done
II think I seen one of the battery 100% SOC at 3.1V is why it showed 100% every time you click in battery type it resets a lot of settings. I found that out way back when I was first configuring mine.
It would be great to have one tab or one window with multiple views of all batteries connected in parallel, even if there are 2 or 15 of them. (The Sun Fun Kits V5 BMS app has a very nicely done multiple view in one window of their 12V batteries connected in parallel or series).
It would also be great to be able to set up a Master BMS and simply have the possibility to propagate all the settings for all batteries connected in parallel at the one click of a Propagate BMS Settings button.
That's what Seplos does now with their V3 BMS. One page shows the important parameters.
Hmm. Well, to display the SOC for all the batteries the Victron would have to do a weighted average based on the Ah capacity and SOC of each battery. The question is... does that make sense? What does the human operator expect? What should the behavior be if one battery was in a failed or manually disconnected state?
That brings up the question, what does the user use the SOC display for? Determining how close the bank is to empty or how close the bank is to fully charged would be a common human desire in which case we would want the Victron to discount a failed or disconnected battery for displaying that value. That could get confusing pretty quickly for the human reading the value and wondering what it means.
I would say there is no ideal solution and displaying just the master battery SOC is probably reasonable. Particularly since under normal operation the SOC's for all the batteries will be within 10% of each other even with size differences mixed together.
-Matt
Have you tested and so are you sure that the new JK works with 8s and 24 Volt? Greetings from former „West-Berlin“
You leave the garage door open but there are no bugs flying around the lights or mosquitos. Also it’s hot, but you don’t sweat much, your garage only has fans? Are you an AI?
Hello Andy great seeing your videos. Keep looking at the sky. Question, have you ever heard of a 16s cells going to zero volts. All cells suddenly are at zero and after 3 to 5 hours later it goes to normal.
Next day the same thing happens. Its a daly 100A. I've had this to over 1 year now. Thanks
Thank you. That can only be a software glitch in the Daly BMS. Does the BMS turn off during that time?
Hi Andy. can you do a video on the new Xiao app . the old version was great . Now my bms Jiabaida want discharge.
New from best channel
Andy, will JK have official support page (app and PC software) or we have to rely on you? /end of sarcasm
I hope they will get it right at some stage🤷♂️😄
it's a shame that we can't post photos and videos taken on the jkbms problems in //
Get in contact with their support team under www.jkbms.net/contact-us
thank you handy I have a discussion on whatsapp with 3 engineers but the problem is that he doesn't respond all the time!!! They don't really understand!!!@@OffGridGarageAustralia
I hope you’re taking notes. I’m thinking of you writing a book on the real world 🗺️ 😂
Why don't you use the aircon you bought anymore?
Super inefficient without any insulation in the garage.
Can you connect to the Device ID '0' on COM5?
If the device ID is 0000 you can only connect via the RS495 inverter port. All other addresses, you need to connect to the RS485-1 or -2.
My BMS is completely bricked and does nothing any more.
how to reset bms to factory settings
Hi, can this work in parallel with seplos bms or apexium bms?
No
“Work” as in “protect the battery”: yes. Communication will not work of course
So, is this it chief? I need to order some batteries and JK ticks the right boxes but also our Asian friends do not really have the battery boxes ready for the JK BMS.
Apexium told me they might develop a face plate for the jk inverter bms with touch display. The box is 105$ + shipping at the moment (not yet for the new JK)
Yes, the shipping is the killer but that is part of ordering stuff overseas. The boxes themselves are reasonable priced considering the BMS is $200-250. I was thinking of trying to find a metal fabricator but I highly doubt any in my area would fabricate a few with similar specs for less. Some of the shipping quotes I got was only $335 US for 4 boxes (no cells).
You were actually wrong about the SOC story... You put in the A (master) BMS 280Ah capacity at 72% SOC , in the B (slave) BMS 20Ah capacity at 100% SOC , and if you summarize it, you get actually the 73% SOC :) so its correct! Please try it again, but with different capacity and you will see.
That was only fixed with the newer firmware. With the older ones, it did not work. JK has reacted fast and added this to an update after the video released.
❗️❗️❗️❗️❗️❗️Andy, please, tell the JK that they need to add CAN massage to reduce current when it go closer to full charge of 100%
But why doing it ? When battery hit desired charge voltage current will drop by its own , it will slowly go down , If you think about parrel battery and one geting more current becouse one is charged, it's not a problem since they are parrel. It means that all will hit desired voltage at the same time , and all will decrease its charging current at its own
I think there is no real point of doing it for LFP batteries, if you want slow down charging lower your voltage to 3.4V
@@tomaszszczepaniak2101 because I’m using Solis inverter, and if I set the charge current in bms 100A, the bms is sending by CAN 100A for ever, it doesn’t matter is it 80, 90 or 100% charger. If you think this is normal, you have no idea how cells are working
@@gosmartUkrainehave you ever charged battery ? If you set 100A it wont charge 100A when you are at top voltage , if battery gets charged its internal resistance goes up. Higher resistance means higher voltage to maintain the same curren , if voltage constant , current will go down on its own as battery is closer to 100% soc at given voltage
Conclusion , you absolutely don't need this if using LiFePo4 cells
Did you say come and drink a beer??? Oh heard something like that, sure couldn’t be a deer
Come and drink a beer! Yes, absolutely🍺
can you use the bmv shunt and jk bms connected to cerbo gx simultaneous, and see all the data online ?
Yes, you can use both, but only one is your battery monitor which controls the charging and whole system. The 2nd one is for displaying only.
@@OffGridGarageAustralia I know there is already a clip on this topic, can you make a short clip with the connection between jk bms 4/8s and cerbo gx using the first method (the simple one).
Thanks for all the information and happy holidays
You say they need to enable you to download the settings in a file so you can import them into the others. But the only reason for such a comment is that that is the way of the others.
Wouldn't it make far more sense to say in the software, "push these settings to all slaves"? And of course have a USB connection for the PC.
It seems to show the percentages in the parallel Ah (total and remaining) - kind of funny fail for a professional manufacturer 😂😂
Regarding the SoC:
It mus be an average or better the real calculated SoC (sum of all remaining Ah divided by sum of all total Ah)
If you just paralleled packs with different SoCs, there could be a huge difference. In some cases there could be huge difference as well over time - different iR or cable lengths or diameter.
Which is absolutely no problem in production environment...
Hiya
I found one of my BMSs is still virgin at V14.03. I will update it with version by version to see from which version it looses its settings when switched off.
Hi Andy. In terms of the aggregated battery capacity. I think the best calculation would be for JK to use the weighted average of the battery packs.
If the battery packs are a different capacity, then their SOC could indeed be different, but their voltages the same as they are connected in parallel.
I think using the weighted average calculation is the most accurate for connecting different capacity batteries in parallel.
Agreed
Yup, definitely want to weigh SoC based on battery size for averaging purposes. Or even better: just calculate overall SoC based on the sum of available kWh divided by total storage.
JK - just make it open source! Then we will write the software ourself - for free!
Bugfree, too
And with innovative features
I've asked them already so many times...
You should be on JK's payroll.
Andy, could you please request a custom battery type tab where you can set and save, then load all your parameters
Install a nice Hybrid Solar Air Conditioner Andy..... Like the EG4 :)
Another Great Video Andy. You have verified my own finding. I have 2 of the 200A JK units. It only shows the Soc of the master to Victron. But I have over time noticed three issues.... 1. The PC software Suck Donkey B.... it doesnt show the correct battery into as you have found and you also cant change the Uart / Can protocol from the PC. Thanks goodness for the BT app.
2. A power cycle of the BMS looses all settings and you need to start over.. In the last video one of the last things you did after setting up the BMS in the Jaki was to power it off, hence this time all your capacity and voltages are out.
3. I have found the parallel to be a bit flaky. I have had several instances over the course of the past 2 weeks where the slave BMS drops off and Vic only shows the fata from the master. On the main screen of the BMS their is a value bottom right PCL:OFF. Helen Tells me this should be ON for parallel communications link, but cant tell me how to get it to turn on. There is a slide switch to disable it but nothing to turn it on.....Crickets since I reported this back.
I have found one other issue with the RCV and Float voltage. When my batteries got to the RCV and then changed to the float value the Victron through up an over voltage alarm from the BMS and triggered the Freq to 53hz so the Fronius Solar wouldn't charge anymore. it held this well below the 53v I had set and I eventually intervened and turned off the float swicth in the BMS and all was good again,.
Over all I am happy and I am confident enough that JK will sort out the issues in time, Hopefully issue 2 first, 3 second, then 1.
As always enjoy the SPATS and xmas looking forward to some excellent vids in 2024. Ty H.
Exactly the same what I noticed with the lost settings. On the initial V14.03 firmware it was fine.
@tyweb9264 So you were told that the PCL (Parallel Communications Link) should be on when paralleling batteries? I wish there was instructions somewhere. I have 4 of the new JK BMS 200a with the version 15. Who is Helen?
@@Braebyrn Hi Sorry for the late reply. Helen is the JKBMS lady I have been talking with on the support line. Yes I have upgraded my firmware to 14.20 a couple of days agao, and whilst the PCL is still showing as off, they seem to be working as a pair just fine. But I havnt been able to monitor it 100%
19:50 Parallel SOC should be calculated based on individual SOC and Capacity.
ie, 30% of 100AH + 50% of 200AH = 43% of 300AH and not 40% (average)
Hence the can connected bmses I d day. Why still use the Victron shunt? Should be as you said. Maybe add a nice color screen. Possibly already in Home Assistant and not in Victron is?
Yes, apparently that's what they do. Does not seem to work though in the PC software
The new FW 14.15 fixes that now and does the SOC calculation correctly.
I was looking at cases that use the JBD bms and JBD seems to using the same communications board as the JK bms. However, on the JBD case the communications board is rotated 180 degrees (upside down from how Pace mounts it). If JK is copying that, then I can see why setting location 1 is set by moving the right switch on that DIP switch instead of the left switch.
Anyone knows if this parallel feature makes it possible for one nmc bank parallel to one lfp bank or not recommended as usual?
I think this could be important: Charging Settings should copy to slaves in case of the Master fails. (If the lowest ID becomes the master then… or only 0 is a master? Which would be a single point of failure)
If the 200A version can’t see less than 0.8A the victron system still knows what it pulls, correct ? So SoC might be not correct but maybe better that shared current is not activated with this BMS
Awesome job and always appreciate the diligence you provide. My question is, how many of these BMS’s can be paralleled? I’ve have six DIY 16s LiFePo4 packs.
Does each additional BMS paralleled RS485 back to the master? Or daisy chain slave to slave back to master?
Hi Andy! Thanks for all your videos, I discovered your channel recently and I'm learning a lot thanks to you! I have a project to assemble two 4S batteries that I would like to put in parallel. I was wondering if it was possible to put two 4S compatible JKBMS in parallel? Or are there other brands of 4S BMS that can be paralleled?
Can I connect two 24v batteries in series to get 48v. I have 2 batteries made of 8s EVE 304ah using two JK 4s8s 200amp BMS. I wish I had bought 8s20s version. Now connected as parallel as I have 24v inverter. However now I got solis hybrid inverter which accepts 48v battery. Moreover, how can I get these two JK BMS communicate with each other and the inverter.
Due to the wonkyness of JK I've had my battery builds on hold for over a year trying to figure out the issues with the various JK bms' I've purchased/installed. I tried to figure the issue from a logical standpoint and am still conflicted. The programmers at JK use some logic I'm not familiar with. And due to that I've been waiting for them or someone at another manufacturer to come up with a bms that doesn't use 'pretzel-logic'. It's very disheartening as a one off type buyer to continue to have to replace components and wait for deliveries. I often wonder how the makers of power stations, cope with this. Probably pallets of returns is my guess. I realize these are complex devices, but not enough quality control being used?*!
😅I wish they would package the software for Linux. Really just put out an rpm or deb file, it’s so easy and I am guessing they are developing on Linux anyway.
Hi Andy, Good video thank you. Mine has version15:5 and when I do exactly as you show and I select the software 15:10 for the JKPB2A-15S-15P which of course is what mine is, it just says "Device identify is not same as connected device!?? In fact I tried all four of the versions in case there was a different type in this box, same result with all.
I have to update the firmware as 15:5 loses all the settings when you switch it off, has anyone the same problem and if so is there an answer please?
Regarding the state of charge being reported to the inverter. What are the chances that the lowest value of the 2 is the one being shown?
If i have two batteries and two JK 200a BMS connected to one inverter, in master and slave configuration - Can I draw up to 400 amps from the batteries in total? Or, is it limited to the max amps of the master bms, i.e. 200 amps total from both batteries?
I just took the 14.15 test, still bad, it’s Chinese!!! on the master bms I mark 3.00v soc zero it marks zero I do the same thing on the slave and no it is decent below 3.00v and does not switch to zero it's incredible!!!
What is this green port written dct on communication plate?
Is it dry contacts? If it is then what is itsfunctiolity of it?
Does it really work in this bms?
Kinly make video on its functions.
I'm having trouble with my JK BMS, was working fine, left the house and now the battery voltage is all over the shop 😢
Good day Sir Andy. I just want to ask: Can i parallel Pace BMS and JK Inverter BMS thru RS485?
No, they will not talk to each other. We have to wait for the CAN to CAN Multiboard Peter is currently developing.
@@OffGridGarageAustralia Is it advisable to parallel two lifepo4 battery packs with different BMS brands without linking the RS485 ports? just to increase the capacity of my ESS.
You can use batteryaggregator with the help of the setuphelper tool. Than you can have multiple batteries from different vendors. works for me.
I see the jk BMS has 14.14 now. Any ideas what changed?
Frankly I do not see the big advantage of all this hassle, I did not connected the bms to the cerbo cause I prefer those systems to be independant, bms is for me, part of the battery and the only one able to decide on how to protect cells. It's safe and efficient.
I got 2 pack in parallel with old jkbms on both, one pack is outside and the other inside the house. Sometimes the outside one disconnect charge (under 5°C) then reconnect later and even then the balancing current is not insane... All work fine.
Nope, state of charge per battery weighted by capacity (charded enery by battery), then calculating the charged capacity and set it in relation to the total capacity of all batteries. That would be the exact SOC of the whole system.
Please can anyone tell the mean of 10p, 15p or 20p in jk inverter bms. Thanks
Is there a dedicated software for monitoring the Seplos BMS?
Its probably just picking out the wrong field from the data packet on that "100AH" display on the PC. I also like how the voltage gauge goes all the way to 200V and the needle obscures the value display.
@@BobDevV The Victron will have a maximum amperage setting separate from all the BMS monitoring as well. Obviously that would be set to what the wiring, breakers, fusing, and devices can actually handle regardless of what the batteries themselves can handle.
You are making an incorrect assumption about the shunt. If you look at Victron's product line-up, their smart shunts are 500A, 1000A, or 2000A. The smallest offering Victron has is the 500A shunt.
Most people will be limited by the wiring they choose, not the shunt.
In anycase, one always has breakers and fusing for the capabilities of the wiring, including the shunts. Whatever the worst-case winds up being, if you make a configuration mistake, you blow a fuse or trip a breaker. Nothing actually fries.
For example, I have three batteries in parallel for 200Ah @ 51.2V, capable of discharging or charging 200A continuously and bursting for 400A. Great. But my cabling is 2 AWG so the actual maximum amperage is only 115A. My fusing is 100A and I have an 80A master breaker because my current system doesn't have the ability to charge or discharge more than 60A anyway.
If I had a setup where the Victrons were under a centralized control system, I would thus set the global amperage limit to 60A.
-Matt
I hope they are paying you well to test their sh1tty software! Is it just me, or does it seem like the JK hardware engineers don’t talk to the software engineers?
Does anyone have used/tested these on any other inverter other than Victron? It seems JK is Andy's dedicated company 😄
Pylon protocol works , but in single bms I don't have 2nd bms to test , tested with sofar me3000sp
Tested it with Sofar 6000 and with Growatt
With pylon protocol it will work with most of the inverters
Thanks !!!! Was waiting for that ❤
Great videos! Thanks a lot! I wonder if can connect jk bms in series and have some PLC connected via RS485 to get information from all boards?
Great Video again as always Andy!
Im looking for an nice housing/enclosrue that fits 16x 280Ah cells and this new JK BMS. Anyone experiences and/or recommendations?
I'm not really looking for a box including BMS, as that is just waste of money.
Best cases are from my perspective still from seplos. you might buy one case from them and modify it for the jk bms.
My videos usually start with the rain battering off of the window😭💦💦💦🏴
Thanks for the video. Very educative. Is it also possible to connect a 150A (or 200A) as a slave to a 100A (JB-PB1A16S10P) to a Victron CerboGX?
Yes, you can mix different JK BMS, PB2A16S20P and PB1A16S10P. Make sure both have the same new FW 14.15 which fixes the SOC calculation.
Hi Andy, do you know if the hardware version needs to be the same.
Mine is V15.XA
Happy Christmas Andy!
Thank you very much for your support!
did you get an reply on the average of SoC, or will jk inverter bms still report SoC only from the connected board?
i found out if i choose pylontech protocol instead of deye protocol i get an average SoC.
Hi Andy & community and thanks for this long waited test. I have complete new setup build with two (2) JK-PB2A16S-20P, (200A, with 2A balancer). Ordered them also among first ones when those became available. Both of them seems to be working via bluetooth OK (8S config). Both of them stand on V14.03 software version while hardware appear to be V14.XA.
Bought also RS485 (USB to RJ45) module for the firmware updates. Managed to install it OK to my laptop. At least I think so.
The problem is that there is no way I can connect these BMS's to laptop through latest JK PC software, it just simply dont bring anything on the screen even the module light is flashing, so likely "something" is happening. COM port should be OK as well as well as device ID. So I have now a bit questionmark if the issue is on the RS485 module (first time ever I use that) or do I have two similar faulty JK-PB2A16S-20P's as you Andy seems to also have. Honestly I have no idea what to do next, obviously I cannot stay on 14.03 version.
Is there actually anybody who could confirm success on updating software for 200A, 2A version?
UART1 protocol No. = 0 (if trying to change as 1, it will give "sending failure" message on bluetooth app.)
UART2 Protocol No. = 1
CAN Protocol No. = 0
Any ideas?
Hi, I love your videos. They are great and very helpful. Do you have any information whether this JK invertor BMS can co-work with Victron Multiplus correctly with multiple parallel battery banks with own BMS ?
Hi Andy, Thanks for your very informative videos. I need a Bms capable of 400a max. Would i be able to achieve this by using 2x JK 200a BMS. I have 2 6s packs so could run 1 bms per pack and draw 400a right?
On your web site, the folder for DOCUMENTS for the JK smart BMS contains only a document about a relay. Were is the full manual? Thanks.
Andy Example You load the 2 BMS 100% and even voltage you will discharge you will see that the BMS Maitre Decharge + 20% Pare relations to the slave on my 2 bms seplos never I had this concern !!! He does not convince at all !!!
Hello Andy, thanks for the great videos about the new JK. Will this JK-BMS also work with RS485, did anyone test this? I don't want to install a CANHat on my RasPi if not necessary.
Hi Andy for your BMS problem block on request to JK a Provision Code to reinject it and it should go after your test it is not push because if you leave the 2 bms in // what days you will realize who sinceronizes more in upload and which loads the same thing it deregles and come back to factory alone tell me if you have seen that !!!! THANKS😂