Why locking a BMS is not a good solution. The good, bad and dangerous with the QSO BMS.

[@TheBelcherMan]

I'm going back through all the oldie-but-goldies. Started from the beginning, they've all been amazing. Buying you another couple SPAT, I just can't imaging this journey without you. Thanks mate!

[@tiborchren]

I was very pleased when I saw for the 1st time that the video is 57:20 long. But even the 28min was very interesting, as always. Hopefully manufacturers will start listening to their experienced customers, otherwise they won't have quality products. It's in their interest too and they should rather appreciate it.

[@OffGridGarageAustralia]

I'm afraid the cultural difference is in the way to improve products. They may be offended if I give them feedback about possible imrpovements.

[@laurentsantaibambu7324]

@@OffGridGarageAustralia No Andy does not hesitate! they have to stop thinking that their client sucks and doesn't understand anything, look at THEIR results?? what I could see for me these beginners, not good at all!

[@lkjaer]

Hi Andy Often when setting up a 10kV generator set to supply power grid, we setup 2 over current protection stages, one with lower A setting and high delay and the secund with higher A setting and low delay. To make trip faster on higher A measurements and allowing smaller A exceeding the limit for a bit longer. I think the 9 pin (maybe serial) connector you are talking about in the beginning is called Sub-D.

[@lua-nya]

D-sub?

[@edwardvanhazendonk]

From all videos QSO is showing you made on their website they didn't listen to what is best to setup. I totally understand people are confused with that crappy bit of software and it's totally wrong settings. I think I'm very happy with JK (although there is no perfect BMS at this moment). Thanks for all your hard work and sharing this video.

[@OffGridGarageAustralia]

I hope they read the comments about their products...

[@guywatkins]

The second half of the video was great! Sunny Australia at night with 0% SOC. The frog at the end was cool!

[@computerguru]

Glad to hear that they gave you the password so you can correct their settings.

[@markbrewer2153]

Tanks Andy. As you already pointed out the only way to have it unlocked is to have min and max settings for the BMS and when the warranty expires, they should unlock it completely.

[@Getget94]

Hello Andy at 11:35 I think that CHG_OC1 and OC2 are two levels of protection. 200A for 5s or 250a for 0.5s and the same for discharge 210a for 10s or 250a for 0.5s

[@guywatkins]

I can understand the BMS being locked down. But after the warranty expires they should unlock it. Also, they should allow you to change some parameters to even safer limits, like changing the max amps to a lower number, but not a higher number.

[@OffGridGarageAustralia]

There is no way for them to do it unless they give you the password. How long before that leaks and everyone has it though...

[@TheRonskiman]

@@OffGridGarageAustralia I think it already has 😉

[@keyem4504]

Is the second half of the video a depiction of devil's kitchen? 😂

[@OffGridGarageAustralia]

Some may get the hint 😊

[@evil17]

Good job, vid & info Andy. Bad fail for QSO though, they have literally programmed their batteries to fail. I appreciate ur work on these projects, I would never have expected to find BMS settings (Locked) so far out of whack by a manufacturer. Thanks

[@typxxilps]

7:50 pouring rain is heaven's kind of applause seems to be the applause for the 4 long days of communication with qso support

[@OffGridGarageAustralia]

Jeeez, I really need to stop teaching them the solar and battery basics. If they don't know, their problem. I spent far too much time on the chat with them and felt, we're moving backwards because they didn't understand my questions and concerns. I rather thought, heaven is in tears about all of that. That's how it felt.

[@jackoneil3933]

Thanks again Andy. I concur with your conclusions about limiting BMS setting to withing parameters that would not cause damage as a essential feature for and OEM device. Perhaps it's worth considering that a BMS might be best considered a Battery Protection Device when it comes to charging and discharging and should not be relied on for charging management in lieu of a proper charge controller and dedicated under voltage protection. I recently tested several LFE single sell charging/boards for smaller cell packs, and found the charge voltage was set to 3.7 to 3.75V but the current had tapered down from constant charging current of 3A to 6A up to about 3.4V to 3.5V , and then to about 100ma to 300ma at 3.6v and and 50ma to 3.7V. One Charging Board manufacturer who respond to my questions about the 3.7V+ charged voltage they used, and they replied that 3.75V design maximum voltage for LifePo4 chemistry, and industry tests indicate that little if any additional LifePo4 cell degradation occurs up to 3.75V vs 3.6V, and degradation typically only becomes a factor closer to 4V. if charge rates are below 0.5C, add that their modules were intended to be used with small, inexpensive cell packs intended for a use case of several hundred cycles such as in medical and hobby devices. I found some test data from Chinese universities that seemed to confirm what the manufacturer indicated, and I did some overcharging tests using 32700, 6ah LIfePo4 cells charging them at 1amp above 3.6v to 3.75V produced little of any additional heat, but at 1 amp the cells heated noticeably from about 3.8 to 4.2V, did not heat up to 5.2V if charge rates were kept to below 100ma. I tested overcharging a new cells I assumed to be defective because arrived at only 1.5V and self-discharged fairly quickly after charging to 3.6V, and tested at only about 4.5 Ah rather than rated 6ah, by charging them to 5V and even 6V at 1amp until they reached about 45C and then left them float charge at about a 200ma charge at 5.2 volts for about 8 hours to see f they would damage, and to my surprise, they dissipated to about 3.5v and held and returned to nearly 6ah of capacity. I just checked one of the self-discharging cells that arrived at 1.5V which I severely overcharged a year ago and it was at 3.45V and still tests at close to it's rated capacity. I have no way of knowing what it's cycle life is after severely overcharging it, but it appears the severe overcharging remedied it's self-discharging issue. On small inexpensive packs (I'm using the 3.7V packs for eBike voltage Booster packs). I think 3.75V is acceptable, I currently have a 3.2v, 25ah booster pack with about 300 cycles I've been charging to 3.75V and discharging to 2.5V and it's at the same or higher capacity it was when new. However, my $50 packs intended to last a few years, not $3000+ dollar battery banks intended to last a decade so having a perfectly configured BMS and charging system in that case is essential.

[@OffGridGarageAustralia]

The BMS only requests the charging from the inverter or MPPT. If the MPPT fails, it will still protect the battery in this case. Interesting testing you're doing. You should have your own KZbin channel and show this on there. I would watch it.

[@larskiau2115]

I hoped of any funny end at 57:21 of your video. But as always… your content is great to watch.. good job Andy..😂

[@OffGridGarageAustralia]

There is no happy ending here. What kind of videos did you expect here on this channel?😂

[@larskiau2115]

Super…nun kann ich gar nicht mehr schlafen.. egal, ich schau weiter🤣🤪🤣🤪

[@Carsten-PV-DIY]

Thanks again for your Test and sharing your experience. I thought really you have been caught on camera saying":sunny hot Australia" Then it was hard to understand your words with the rain. Very entertaining! 👏👏👏😆

[@einzelkampfer2006]

@Andy: I read these current protection values this way: 200A (OC1) will be triggered after 5s. If the current is over 250A (OC2), it will be triggered after 0.5s. Take a look at the different delays for the currents. Its not about warning and protection, its about different allowance times. So combining alarm and protection tab for Charging: Alarm (Warning) will be risen, if current is higher than 102A after 1s. Charging will be cut off after 5s when current is higher than 200A or after 0.5s if current is higher than 250A.

[@DannyBokma]

This! As short term and a "long" term current limitation. Quite pleasant for in rush currents of machines.

[@Full-of-Starships]

Came here to say the same. Up to 200A sustained indefinitely. Allows between 200A - 250A for brief startup currents only. Circuit protects itself if 250A BMS rating is exceeded.

[@bearupfarm1818]

Good job Andy. Another battery to not buy and stay far away from.

[@OffGridGarageAustralia]

Unfortunately, yes.

[@tiborchren]

The box and cells are good, I would replace the BMS to my taste (JK) and there will be no more dilemmas and unwanted surprises. Same with all Seplos BMS.

[@mjpbase1]

Good synopsis at the end. Thanks, Andy.

[@OffGridGarageAustralia]

Thanks Mark!

[@paulcurtis5496]

Like# 64 - you get a rain and we got 4" of snow last night in "Always Hot & Sunny Tucson"...

[@klightspeed]

With the OC1 and OC2, I wonder if they apply in parallel, with the first being set to a lower current but a longer delay, so that it allows charging at 200A for 5S or 250A for 0.5S, or discharging at 210A for 10S or 250A for 0.5S?

[@DanBurgaud]

12:00 I interpret it as discharging 200A for 5 seconds or 250A for 0.5seconds ... etc 13:00 Meritsun claims their batteries can go upto 70⁰C... 70C is scorching hot IMO; I can't hold it indefinitely. 20:38 >200AH pack and ~200mv deviation, with 100ma balancing current wait 2 weeks to balance it.

[@OffGridGarageAustralia]

- I'll test how the BMS and settings actually work but they have now confirmed that it is in fact only a 200A BMS so, a 250A setting makes not much sense unless they want to create their own warranty cases. - Temperatur settings are far too high in my opinion - yeah the balancing does not do a dent in this battery. I'll do a full top balancing and see how it behaves afterwards.

[@zeropointbalance7366]

Andy, Thanks for looking at all the details for a battery system like this. You managed to laser focus on why lockdown is such a bad idea: It forces the customers to accept the bad quality decisions made my the manufacturers and it shows what appears to be a setting that will destroy your battery if you use it at low temperatures. Many customers are not as savy as you and will be very unhappy when they are forced to throw out the batteries. In this case there is a worse issue: apparently QSO does not know that their batteries need balancing occasionally. Why do I say that? Well, if you, as an expert user get frustrated balancing a clearly out-of balance battery what do you think the average user will be able to do? It would be interesting to see what it takes to balance this battery with the built in QSO supplied balancer: My go to test for this type of balancer is to set the charger to 55.4V and walk away. Check voltages once a day and record (just to see if they actually move). If they do not move, there may be the infamous “charge balancing” type setting getting in the way (is it hidden and also locked down? Like on the Daly). You should see the voltages move eventually. If it truly is 120mA (good chance it will less, maybe 40mA?) you should be able to balance 2.7aH/day. So your battery should come into balance in a day or two. (This is my go-to method to balance any battery with my clip-on Heltec balancer, which has an effective rating of 1A for this method and can do 24AH/day. My guesstimate four your out of balance is ~~3aH, that is why I say a day or two - from your low cell at 3.388V) If it takes a day I would say the balancer is actually working good enough and I could recommend buying this battery, anything much longer I would tell people to stay away and tell QSO to fix/improve their balancer, and while they are at it also fix the temperature settings.

[@1segzyo471]

Hi Andy. Another wonderful video. There are about 30mins of blank screen at the end of the video.

[@HeinzMeulke]

He was probably calibrating a spat and hit the publish button prematurely

[@OffGridGarageAustralia]

A frog got in the way. Should be fixed soon. I was wondering why the upload took so long 😄

[@svieni90]

You are right that it makes no sense the cell Voltage Alarm to 3,7 V adjustet. I am Not sure but i think there is another mistake, the Unit is mV?!

[@OffGridGarageAustralia]

Ha, I didn't even pay attention to that...

[@texciler]

Regarding the OC1/2 parameters... I would think of an OR. So it would trigger if more than 200A for 5 seconds OR 250A for 0.5 seconds charging current. Maybe?

[@OffGridGarageAustralia]

But it's only a 200A BMS, they confirmed. So these settings don't make sense at all. Video lengths is now fixed 🐸

[@corelsim]

Hi Andy, I'm following you with great interest from Italy and I'm studying with you to build my solar system. You are number 1! In your opinion, knowing the password of this bms, is it a valid bms like Gobel? I should integrate it into the Victron system. Do you recommend it or should I go elsewhere? If anything else, what do you recommend for good integration with the victron system and for it to work well as a bms? Thank you

[@SanderStolk]

Andy! I was waiting for more but after 28:15 in the video it stays black for 30 minutes... I was hoping for a give away but no luck... Wasted 30 min of black video and hope :p

[@OffGridGarageAustralia]

There was a secret surprise in the dark. Did you miss it?

[@Eyezzzonly]

Hi Andy. I got a bms (RadioBTech and the xiangxian app) and out it on and cell 2 and 3 are displayed different order as I measured. Could it be the bms is counting the cells from the negative to the positive? (Cause then it would be correct) Because balancing is correct and all cables are in correctly order and working....it's curious Tried different apps for making sure. All are displaying it in this order...

[@FutureSystem738]

Thanks Andy. Yes- it’s a fail! I suspect I am like most people, and I would only set MORE conservative parameters, definitely not less!

[@panospapadimitriou3498]

that trolling weather is quiet romantic hahahaha

[@OffGridGarageAustralia]

The weather is just sh!t for doing solar projects and videos, I tell you...

[@webalizer_yt]

28:15 What you say here is the best part of the video!

[@bastian433]

Maybe you need to press read for the alarm parameters too, they probably will also have red parameters like the other tab? And after 28:12 there is just black screen :P woops.

[@GapRecordingsNamibia]

This is KZbin, a glitch in the upload causes this and sometimes the video even repeats... Don't know why. But it is on their side, I have tride to email them about this but it is impossible to get an email through to them.

[@john_in_phoenix]

Watch it all, there is a frog croaking at the very end. Andy did tell us to be sure and watch to the end, maybe it is just his way of seeing who does?

[@OffGridGarageAustralia]

I read the alarm parameters as shown in the video. The frog go somehow at the end far far behind the actual video. It's now gone and only a handful of people could witness it.

[@servisfibris6679]

Andy - OverCUrrent Protection is 200A for 5 seconds or 250A for 0.5s, that's why.. alarms are alarms..

[@awesomedee5421]

Can you open up the chassis and read some identifying info no the BMS to find out more detail?

[@Dutch_off_grid_homesteading]

Heya, looking forwort for more test's

[@PabloTBrave]

A company should allow you to change all the settings, not allowing this may reduce sales/revenue .. ideally the firmware should be clever enough to validate your settings and advise if the settings could damage the hardware

[@OffGridGarageAustralia]

Yes, exactly, if the software does not allow entering 'wrong' parameters, it's all good.

[@BradCagle]

If you have a JBD bms that is password locked, I wrote a python script to clear it over bluetooth.

[@OffGridGarageAustralia]

Oh, that is great, Brad. I had a few comments here for lost passwords in the JK...

[@nielsdelrue7242]

Wow andy you are amazing the god off battery cell's i watcht all your videos YOU ARE AMAZING 👌👊

[@TheCampersSweden]

Greate video! Specially the last part, w8ted for a funny ending 🤣🍻cheers

[@OffGridGarageAustralia]

That's hopefully fixed now 🐸

[@bilalbhatti7549]

They are the correct calculations. Its charging at 50amps. Discharge at 95amps. Max amps while 10% wasted so peaks can go to 107 to more loads loads

[@SebyLazarovici]

I still don't understand... QSO bms is Seplos bms?

[@Der_Hannes]

"Sleep_Cell_Voltage" - anyone any idea what this parameter does?

[@clarencewiles963]

Do the manufacturers read or review the products we rely on. As of now some of the plug 🔌 and play products are disappointing ask Will Prowse, or others. Shock hazard just saying. Edit: I don’t expect a reply but I do believe that from time to time the manager/ management/manufacturer will read the comments.

[@davidkettell6236]

You would think that these battery manufacturers would actually know what they are doing but apparently not.

[@BobHannent]

For the MOSFET temperature they can usually comfortably have a 150C junction temperature perhaps much higher, so 110C is probably a good number. As an aside there's a good video by Der8auer recently where he was talking with an Intel thermal engineer and the guy said he finds it funny when people worry about the temperature of their CPUs. For the environmental temperature, I can understand why someone would be paranoid about having it shut off if the battery is being used for a critical application. Imagine you want to start a circulation pump for a heating system and the battery won't let you, despite the battery itself being okay? I agree -25C is low, but even your suggestion of 10C seems high to me for just a case temperature. There must be a middle ground there. I think I sympathise with the battery vendor, but I also agree that if there's not enough control it won't be useful.

[@garys-half-baked-offgrid-dream]

Aww I was looking forward to an Hour with Andy.... I feel robbed. Half an hour of darkness 🙈🤣🤣🤣

[@OffGridGarageAustralia]

You could have still watched it until the end. There was a surprise which sneaked in..

[@energihippien]

the code to edit in the parameter list is 111111 for BMS version BN-HES16S48V200LT55-V1.1.0 I don't know if this is old news

[@bearupfarm1818]

This goes to show that all these battery manufacturers are assembling and don’t really now about the product they are selling. These why you really do research on the manufacture reliability. Buy battery that is built in your country to eliminate the customer service problem.

[@OffGridGarageAustralia]

Well, we will get to this soon... Even if you buy a battery in your country does not mean you get better customer service. It can still hold the same Chinese BMS as if you would buy online. And the 'service' will come from China anyway.

[@awo1fman]

What's that I see at 42:37 ?

[@OffGridGarageAustralia]

You were the last one to see it...

[@ralfhedstrom]

I bought batteries with locked BMS and tried for a long time to get the password, but no cigar. The batteries works greit in my system though, but it makes me angry that people who can't stand redpondible for their own mistakes are making it hard for all of us when they change values they don't understand, and then claim warranty/new batteries.

[@nathanbutler3424]

Bloody frog got me at the end!

[@bilalbhatti7549]

My battery keeps on tripping. If i use it under the utility loads and load balance all woroks well . Like 4kwh utility, 2kwh battery . But if the inverter foes off grid . Load was 7kwh.. to 8kwh.. my battery is 5kwh. It use to futt off and restart. Now it keeps on tripping due to high current discharge. Rated is 96amps.. soc amps were 107. With 4.7kwh last showing. And it keeps discharge after that. Wont charge wont work wont work with solar also and effect the production . It ahould share loads with 5kwh max and then pull from the utility as ots a hybrid .. under volts works fine.. but bigger volts wont do the work.. it keeps on going off geid and batt wont survive .. so i have to call my vendor and they manage the bms online remotely yet of i ask for the software for the bms they wont tell.. they say this is all the info on solarman application. What to do if my battery tripped due to protect saftey.. they opened it and worked for 2 days.

[@noelbondad7423]

Good morning Andy,

[@OffGridGarageAustralia]

Hello Noel! 👋

[@wayne8113]

Thanks Andy

[@dronephantom2649]

I have seen Locked BMS that use it's serial number as password, I don't know if this will work on your BMS

[@OffGridGarageAustralia]

It's a different password here.

[@stanlibuda5786]

I can only write in German, my Englsh is not well enough. Sorry for that. Ich habe mir zum ersten Mal im Leben eine LiFePo4-Batterie gekauft. Mein Laderegler ladet bis 100% (100 % SoC) und hört dann mit der Energiezufuhr auf, weil das BMS die Batterie abschottet. Leider aber auch die Entladung der Batterie. Mein Wechselrichter gibt eine Alarmmeldung. Alle elektrischen Geräte gehen dann aus. Nach ca. 5 Sekunden ist die SoC auf 90 % und das BMS gibt die Batterie wieder frei. Und der Wechselrichter liefert Strom. Hast Du eine Ahnung was das für eine Ursache haben könnte? Bin kurz davor mit dem Vorschlaghammer auf die Teile zu hauen. Ich muß tagsüber meine Geräte an die Haussteckdosen anschließen wenn ich nicht zu Hause bin. Ich hatte nur AGM-Batterien. Da treten solche Probleme nicht auf. Auch nicht, daß trotzdem meine Solarmodule mehr Watt produzieren als ich verbrauche, die Batterie nicht geladen wird, bzw., der SoC gehalten wird.

[@OffGridGarageAustralia]

Schwer zu sagen. Das kommt ja auf die Einstellungen des Laders an. Wenn die nicht stimmen, schaltet das BMS ab bevor Schaden entsteht. Das Entladen sollte aber funktionieren. Was fuer ein BMS ist das denn?

[@stanlibuda5786]

@@OffGridGarageAustralia Der Lader, Steca MPPT 5020, hat die empfohlenen Einstellungen des Handbuchs der Batterie: 28,8 V Absorbtion und 28,2 für den Float. Wobei Absorbtion die Wartungsladung ist. Ab 30 V schaltet das BMS die Batterie komplett ab. Der Lader nimmt diie 28,8 V wohl auch für das Aufladen der Batterie. Auf das BMS habe ich keinen Zugriff. Das ist sind 2 PowerQueens 12,8 V 200 ah. Allerdings habe ich zwischenzeitlich mal die Maximalspannung der Batterie auf dem Laderegler abgelesen. Dort stand 60,2 Volt. Wenn das stimmt, dann bin ich noch mehr perplex. Wo sollen die herkommen? Ich habe den Wert mal resettet und lese morgen mal ab, ob der Wert wieder erreicht wird.

[@jimjones7821]

Ist gut

[@walter--]

What is the password to change the settings?

[@john_in_phoenix]

Newsflash, a frog croaked at the end. (Honest) Sounds a lot like QSO knows nothing about batteries, but is buying from some other company and selling as their own (not uncommon). Their lack of understanding and technical support is telling.

[@OffGridGarageAustralia]

Yes, absolutely. It's very hard to communicate as they don't understand the basics and how the software and function work. They certainly buy all their gear from 3rd party companies and just re-brand it. The frog got at the end by accident, hence the video is so long. I've edited this now but it may takle some time until this has changed. I was wondering why the upload took so long last night...😊

[@gavinnoname1424]

What's the download link for the software please? Is it on another googledrive like Seplos was?

[@OffGridGarageAustralia]

They sent this to me when the battery arrives. Not sure if there is an official download link. Do you have this battery as well?

[@gavinnoname1424]

@Off-Grid Garage no, I'm in the Seplos Mason club! But I like to check these Chinese softwares to see if they are also doing any suspicious activity.

[@soulmanm12954]

It’s “pa ram eters” not para meters!😁😉 Thanks for the info!

[@mozismobile]

In Australia it's "pram-tez"...

[@OffGridGarageAustralia]

It's parameters. Or Peters, in short.

[@Juergen_Miessmer]

I was waiting half an hour for the hidden track..... ;-)

[@OffGridGarageAustralia]

Yeah, something happened here...

[@myronjonzon1076]

Finally I know what the acronym S.P.A.T. stands for.

[@mozismobile]

I suspect the overcurrent settings are "200A for 5 seconds then hold in off state for 10s, or 250A for 0.5s and hold off for 0.5s". But that is just a guess and something maybe to suggest in another round of communication with the manufacturer. If that's right 250A for 500ms for a 200A BMS is probably within spec but it's not a conservative spec. And we know Andy likes to be conservative :)

[@mozismobile]

Also, this battery looks really good except for the locked down nonsense. I like the form factor and the pirce, but!

[@OffGridGarageAustralia]

That would be a lot of overcurrent for a 200A BMS, even for 0.5s. Yeah, battery and BMS is great but the settings not so much.

[@zoe..d]

Andy is my favourite German on video who can repeatedly say "alarm" calmly. If his shed has air raid sirens or begins to emergency dive.... ill be very upset. In all seriousness - Im sure anyone with enough time and perserverance will crack that password on their own if QSO dont want to give that out to non famous youtube experts.

[@jimjones7821]

All this talk about the frog is quite funny to us here in this country. Years ago when this country was under autocratic rule when voting time came around (total farce of course) the ballot paper had a picture of the ruling party and a frog. You could vote for the ruling party or the frog. Now that democracy has come this way, maybe our frog has moved to Australia ?

[@JStarke240]

If there's no lockout/anti-hammering function built into the BMS, perhaps there's something you can do to get into it :)

[@OffGridGarageAustralia]

As I said, they gave me the password...

[@Mr.TonTop]

Sh🐸t, seems that the garage had a 'brown out', we unfortunately lost 30 min of battman footage 😁

[@OffGridGarageAustralia]

Nah, there was nothing any more after I said goodbye. The frog got at the end of the editing process. It should be fixed soon...🐸

[@olafmackenberg5018]

Moin moin, soon summer will be on our side - and the panels are on the roof - finally - since Thursday.

[@OffGridGarageAustralia]

Great, you can never have enough.

[@laurentsantaibambu7324]

Hey Andy!! very very interesting!!! but i would say AIE Aie Aie!!!😱 My opinion Andy, does it smell bad!? and communicate with the saleswoman who does not understand anything, she translates into Chinese (who certainly does not speak English) to their engineer, who she translates again for you into English!!! it's just impossible they are beginners.🤣 That they block access to the parameters I can understand it, Why? because quite simply, some people think they know, make BMS adjustments, and in reality do not know. This is the reason, and indeed if they give you example 5 or 10 years(joke🤣) of guarantee, it is on that in the terms they say that these the original parameters were changed, the guarantee is no longer valid. But in any good BMS, there are memories, it's easy to see what happened in case of a problem. But if you are in direct contact with the engineer, you will have permission. (normally but you have already tried? this type of BMS the code is 123456) What I could see is that the battery is 96% charged (BMS Data, the differences you may have between your victron shunt and the BMS maybe? come from the current limiting of the BMS?) Cells V avg 3.64, main voltage pack 53.82 V, everything is fine... but After!!!! at 55.2V (your absorption) it's a disaster!!😱 a cell at 3.38v and one close to the limit ovp 3.62v !!! I'm sue if you waited a bit the BMS go to OVP (Cell) with cells not even balanced?! I have rarely seen this!! 0,24 difference! it doesn't smell good at all! Andy can you try to balance them? but I think it will not work for long? It will start again after several cycles. And all these battery are with welded bus bar! With the hindsight that we have, our little experience in this field of LFP battery and BMS (be humble😊) I do not understand that so-called LFP battery professionals can deliver to their customers a battery that gives such results? QSO is apparently a reseller of cells, but maybe they are not 1- who manufacture the BMS? 2 who develops the software? and 3 also not them who assembles the battery?? I can't wait to see what's next, I wish you good luck, but you absolutely must contact an engineer, otherwise it's impossible. Again thank you very much Andy for this video, my personal point of view, I will never buy a battery pack from them.😩

[@keyem4504]

I don't really believe the story with the Current. To me it looks as if it would accept 200A for 5sec and 250 for .5s. This is probably why they have 2 current limits.

[@svens.5588]

I agree

[@OffGridGarageAustralia]

I can lower the settings and test.

[@GTrainRx7]

No idea if it just me, but the video shows as 57 minutes long with black screen for the last 20 or so...

[@OffGridGarageAustralia]

Argh... I stuffed up... don't know what happened here...

[@GTrainRx7]

@@OffGridGarageAustralia Just assume it was youtube's fault ;-p

[@lotechgreg]

See, ... This is why People NEED to speak with their "Wallets", ... If you DON'T buy "SHIT", that is poorly designed/doesn't work/doesn't work properly..... The Mfg'rs will get the message, and, produce the product that is wanted, or, they will go out of business, ... Sooo .. simple .. IDK.... Must be me......... BTW..... Thanks, Andy, for all you do.........

[@jimjones7821]

The problem is many purchasers wont know about any of this and go right ahead and purchase. They will sell boat loads if the price is right.

[@lotechgreg]

@@jimjones7821 I Wholeheartedly agree with you, ... It's SOOO Hard to fix "Stupid", and, I just wish more would work on "Ignorant", that really isn't a hard one to fix.... For myself, there is "NEVER" enough education/due diligence, and, when I F' it up, I OWN it, has kept "same mistake twice" to a minimum, ... Well, ... That, ..and, ..All in my circle, ... Embrace/abhor the, "You STUPID F**K", encouragement we get, prodding us on to make better choices...

[@bildad1234]

Wouldn't want to be in "Devils Kitchen" 😁

[@millzee60]

It might be a cultural barrier rather than a language one.

[@mario-q6k9w]

You mean Chinese people are more willing to take things the way they are? You could be right ;-)

[@millzee60]

@@mario-q6k9w I was referring to their 'politeness' where they are reluctant to give or receive criticism.

[@OffGridGarageAustralia]

Yeah, that could be true! I'm really trying to help them to make better products but it might be understood the wrong way.

[@walter--]

The normal solution to protect your device and have configurable settings it to manage maximum and minimum settings for each parameter. Doesn't sound that difficult....

[@cyberplebs6577]

🐸🐸🐸

[@regnerusb]

Crazyfrog!

[@anacronataff1]

BMS ausbauen, JK-BMS einbauen, fertig.

[@JayDee25895]

Don't wait after he signs off He never comes back on 😂

[@OffGridGarageAustralia]

I'm here...

[@Full-of-Starships]

I think he did once, for a larf.

[@davidpenfold]

Get a remote session and use a keylogger to get the admin password 😈 Or maybe check their parameters on your hard drive and see if you can decode it to change them manually. Oh, I see you got the password!

[@andriyatamaniv9419]

Thanks for 30minutes of darkness =)

[@OffGridGarageAustralia]

Fixed. But thanks for watching 😋

[@vitijordan1979]

Took me 2 hours to find that cue!👹

[@Sega-and-Mao]

Tried 666666 to unlock it?

[@douglasmarquis3446]

Nice frog

[@anthonyrstrawbridge]

Мясное животное, I'm cooking Leckeres Essen heute Abend.

[@Smoke-sj1pr]

turning into the BMS channel 😴

[@OffGridGarageAustralia]

It's all part of it... Should I build another battery shelf for you?

[@jimjones7821]

@@OffGridGarageAustralia I would LOVE to see another battery shelf build

[@Smoke-sj1pr]

Not necessary to do anything to please me. I like your channel and watch it often. Learned a great deal about my Victron system from your experiences, And I thank you for that. I think you do a great service for the solar community. As one who doesn't build battery banks my comment was out of frustration, and was inappropriate. I offer my apology.

[@typxxilps]

20 seconds delay and maybe drop out do not buy award

[@OffGridGarageAustralia]

The settings are a shocker. They tried to fix it with some XML files they sent me. Some were in Chinese and they gave me wrong instructions on how to import and write them to the BMS. It's very daunting...

[@okhadj]

password is 111111 to write prams

[@msgtb]

Don't buy this brand

[@pmacgowan]

You will have to learn how to speak Chinese, you already speak 2, 1 more would not be too hard ;-)