Seplos BMS current limiting function causes weird behaviour.
ฝัง
- เผยแพร่เมื่อ 4 ม.ค. 2023
- So, this morning I observed something strange with the two #Seplos BMSes in parallel. The larger 280Ah battery was constantly charging-discharging a few amps. This is very strange, because there is no load connected to the system, so where is it discharging to?
Of course, I did some testing but could not really find anything related to that. Seplos advised me later, to disable the 'Active charging current limiting' or 'Take the initiative current limiting charging' (depending on the FW version and BMS). Apparently, this switch in the settings limits the charging #current to the battery to 10A and is for testing purposes only (so has no further practical benefit under normal usage of the BMS).
I've got the strong feeling, that this is not the only function or usage for this switch...
Seplos BMS Function Switches explained:
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You should be on the Seplos payrolll for doing their engineering for them.
Thanks Andy, figuring out the world, one BMS at a time...
They should label that switch “Lithium Ping Ping!” 😂
Hahaha, great idea!
Nice job tracking that down. Kinda buggy. Thanks for sharing
I have 4 new Seplos 280 Mason batteries here and the "Take the initiative current limiting charging" switch is OFF by default so I think you are right that you may have switched it on and caused the problem.
Thanks for confirming this.
Thanks Andy 👍
I haven't counted how many Seplos episodes you've done so far, but it's turning out to be much like the Daly Saga... LOL.
What's interesting and frustrating about almost all of these BMS's that we have on the market now, is the lack of instructions and especially the lack of good instructions. Then there's the fun of hardware and/or software and/or firmware updates that get pushed out without any notice or explanation (Daly did this right before Christmas... Doh!). It's all these things that trip up the average DIY'er with endless problems without any authority to turn to. This is ultimately why so many people still purchase ready made batteries, because the patience, knowledge and fault finding techniques are something learned over a lifetime. We can watch people like yourself put a battery together in an episode, then go and click the "buy" button. Some time weeks later the parts arrive and we've found out that there are a hundred quirks that we need to repair. We're so lucky to have you playing the role of crash test dummy for so many products!
You have been reported as SPAM, impersonating and using logos.
Strange problem but good work tracking it down and getting it working.
Take the initiative current limiting switch. I love it. Great feature. The only configuration I had in my mind prior to this was possibly a current limitation switch for low temperature recovery. Supplying the ten amp maximum current would likely heat the cells above freezing without damaging them. Interestingly, the cold cells internal resistance will effectively function as a small ( maybe 10 Watt) heater.
✌️👁️👁️👁️👍
Really bad that two communicating BMS`es can produce such oscillating conditions.
Buts a nice micro-cycling test you got there. Activate it again, connect an oscilloscope to measure the frequency, count the cycles and leave it be for a year or so. Really interested in the remaining capacity afterwards xD.
Fun aside, I got similar oscillating issue with my Victron 48V system working in parallel to a SMA Sunny boy storage. Needed to program the Victron System via Node Red to set the charging current to 0 everytii the SMA SBS discharge current is >0. This fixed the issue instantly.
So I’m not the only one that wakes up and checks my system data before I even have my coffee ?
Noooo, definitely not! 😁
Hi Andy, really interesting!😁
you should know that often the failure of this type of BMS often comes from limiting charging (I had the case of a BMS HS which burned at limiting charging for no reason?)
I don't know the "initiative limiting charging" function??
But on the other hand, I know when the battery has finished charging, the limiting charging is normally activated, and effectively limits the charge to 10A Max, but only at the end of charging, i.e. when the battery has reached 100% charge ! then with these 10A max the battery continues to charge slowly, until OV pack or OV cell's
and at this moment the charge is stopped.
And it's not a bad thing this limiting, because example: if you load heavily (like 50A or more) and instantly stop the load! this causes a shock in the other batteries connected in parallel and also to the solar controller!
I have had this experience several times with BMS, simpler, like JBD, Daly or other... If you stop the charge instantly (with a fairly large amperage) put a multimeter on the cables in parallel battery or on the source (controller ) and you will see that the voltage rises very strongly (more than 60V! sometimes But only a fraction of a second!) and this is not good at all, for electronics!
Obviously when you have several batteries in Paralleles, it is the others who absorb the shock (without sometimes being able to notice it)
It is for this reason that they have put this type of limiting charging.
Again this is only my opinion, with the experience and the tests that I have been able to do... but I am not an electronics specialist. but sincerely I think that's why they put this limiting charging. Thank you again for this video Andy👍
Hi!
I had the exactly same problem as you described!
Do you have more details about how this event happens? I keep trying to understand it. I have done various tests even with the scope measuring the voltage and got this +60V scenario.
Do you have an idea for a solution?
I am at minute 3:25 and paused to give a "guess" as to why. Maybe the two different capacities and thus voltage (sort of) is causing current to go back and forth. The higher capacity wanting to top up the lower capacity as charging takes place. I wonder if one could make some sort of a diode to turn on and off to prevent capacity (amps) to flow to the other battery.
Hi Andi, this switch is indeed per default turned off (checked at my two bms-es). If you want I can check if the same happens with my setup (280Ah and 90Ah parallel). Also, 'automatically activate charging' is turned off by default but seems to be on on your bms. The pdf doesn't explain the feature but I think it means it can ask using CAN to activate charging (for example when SOC is way too low and it needs a charge, works on grid connected mainly ofcourse). 'Manually activate charging' is per default on but I can't understand what this does.
OK, thanks for that. I played around with the 10C quite a bit but not much with the new 10E, and both had this switch activated🤷♂️ I wouldn't be surprised if they are not having a default config when they get shipped.
When you connect 2 batteries in parallel for the first time, this switch may be useful to prevent high current... But a default "on" at 10a just doesn't make any sense to me yet. Done mysterie settings. Just do it you Seplos heavy battery!
I love all your videos, and your technicity, and thank you for them.
Do you think the “DALY” BMS with its optional paralleling module could be another good solution?
Either way, keep testing us and let us know through your videos.
Thanks again
Thanks a lot!
I had a look at the DALY solution, and I am in contact with DALY. Maybe I test it in the future. It seems very complex and needs a lot of external modules and cables. Not sure how reliable it will work over time.
In the end the big battery shows 53.50V and the small one 53.54. a bit higher. This might be the reason all the amps go into the big one. Furthermore I think the 10 A limit also applies to the equalisation current. There was quite some deviation in the beginning.
Well you can't judge anything out from the voltage on a litium Battery in general.
Maybe just a little bit if you BMS have a high resolution AD Converter and both BMS's are calibrated with the same high precision instrument at same temperature, then maybe yes, but in general it is the Ah which count.
The Ah Will be different due to two different sizes battery control by two BMS units, which will lead to different charts characteristics and therefore two different charts situations.
Have the cells been in parallel with one BMS, no problem at all...
Allan 😊
@@A2an The issue here is that two batteries that are connected in parallel "should not" have different voltages. Something is causing a voltage difference between the battery/bms.
It is impossible to have 2 different voltages on two batteries that are connected within such a short distance and under no load. This is why it is quite puzzling why one BMS shows one voltage, and the other is higher.
Tbf, this could be an incorrectly calibrated BMS and it isn't reading the correct voltage and it is noticeable in this situation. Perhaps that is also why the software is triggering because it is detecting a too big of a voltage difference.
Yup, something not quite playing right yet. I have noticed with cheap Daly BMS packs, when paralleling smaller LifePo4 packs at 1C and above, and one cell in one of the packs hits the BMS charge limit, and disconnects charging, the other pack would soon cut off, then the first pack would cut back in when the one high cell would drop, and charging would resume, then the second pack would charge the first pack until it shut off, and vice versa in a cycle until one pack balanced, which with the Daly could take hours.
As it looks like your packs are well below charge cut-off voltage Andy, unless you have one high cell in one pack that's peaking well before the rest I don't think my case would apply.
That's why I like KISS project. 😊
1:47 OMG! 😵💫
9:01 What the heck is "Take the initiative current limiting charging"? some kind of voodoo electronics?
It's so they can easily calibrate the current shunt on the BMS. Unless they have a loop, 10 amps is the limit of most multimeter (just a guess on my part). The factory will be testing these on a test jig and usually will just have switches to set things up and take readings.
It's just poor wording/translation for such a function. A test switch is fine, but call it exactly that.
Hi Andy i am still curious about the limiting of the charging from the batteries in cerbo gx. from the last video. The batteries told the solar charge controlller slow down. can you show the outcome of this behaviour?
Great work Sherlock
This is what happens when battery communication is poorly designed and the Inverter is not using the battery communication properly.
With Fortress eFlex or eVault batteries connected to a Sol-Ark inverter the firmware in the Sol-Ark is able to communicate fully with the battery.
If I have five x 105A batteries connected the Sol-Ark the Inverter shows that the total capacity is 525A and maximum current draw is 300A (5x60A). If one battery is switched off or cuts out the capacity drops to 420A and Maximum current draw drops to 240A. The nice part about this and it has happened to me is that it prevents a possible burnout of the BMS or T-Class fuse burn out on each battery.
I was messing around with the batteries one night and started to switch them off, not remembering that the house was drawing over 100A from the packs. As I switched off the fourth battery the Inverter alarmed and switched to pulling power from the Grid as the new internal setting was 105A capacity and Max current of 60A. The house over 100Amps of current draw was reduced down to 60A and the rest was coming from the Grid.
If you are off grid it would shutdown the Inverter with an error or it might start the generator.
I do not have a generator connected so I am not sure on that last part.
I am quite certain that Seplos does not intend batteries of different capacities to be connected together. That is not a situation that would happen very often "in real life". In general, you should always use batteries (and battery packs) that are of identical capacity if you are connecting them together, regardless of whether they are in series or parallel. I wonder if this issue would exist between identical battery packs.
Having differing capacities in parallel is not the issue here. This is a practice used a lot in various industries. Having equal capacities in "series" is critical.
When batteries are connected in parallel they will charge/discharge at the same rate percentage, regardless of their differing capacities. They will maintain equal voltage and SoC during the whole process. The only exception is when there is electronic devices between the batteries that could cause an imbalance, such as individual BMS devices.
I'm still waiting for the other 3rd Seplos box to be build. We have another 10E BMS then and can see if they play nicely together and if it is just the combination of the different BMSes which causes the trouble.
Seplos could not tell me why they don't recommend paralleling different capacities.
@@OffGridGarageAustralia They don't tell you why because it won't be a proper answer.
Basically they are recommending to not do it based on unknown situations like the one you are having. Because they are still constantly (apparently) updating the firmware on the bms they are trying to minimize connectivity issues. You stumbled on a really good problem, as they renamed fields and didn't make note of it anywhere.
I´m just struggling with only one Seplos BMS. There are so many switches you can turn on or off, it´s a mess.
Love this test thanks allot! One question, i’ve got a custom 300ah 24v battery with a 250a Daly BMS in my RV at the moment and it’s working great, and i also have a 200ah 24v Ampere time 200a BMS that i want to add to the system. I’ve been watching your mixing battery videos and believe i can do this however I haven’t really seen you charging them off AC, i have a Victron 24/3000 wound this be ok to use to charge both at the same time? provided i have them BMSs and wiring set correctly? Thanks
Yes .
@@onthelake9554 thanks
@@Drifty325i You're welcome .
I know you will figure it out Andy, & hopefully renew my faith in the Seplos system, which is quite complex enough to navigate without BT comms, but their language translation for parameter settings makes it even worse. I bought 3 x Seplos “Suntorque 5kwh batteries last march ‘22 which arrived several weeks apart, the first of which is down to 74.4% after 95 cycles in 9 months, the second is at 82% after 112 cycles, & the last battery to arrive still reports 100% capacity after 87 cycles. They are all paralleled & I have performed a number of balancing acts to try to get these batteries to work properly, but I think I am close to opening them up & adding a balancer for future servicing.
May I ask you something, are you charging the batteries up to the full pack voltage? Or have you lowered the charging voltage as Andy has done with his?
The reason I ask is because I just recently had this same issue with two identical batteries bought at the same time, that the capacity of would become less and less, in the end, I went into the batteries software and typed in the new lower full pack voltage into both the batteries software and I increased the charge voltage of my mppt's by 0.5V more than the batteries full voltage and boom! Within 2 days both batteries were back to 100% SOC. I'm just wondering if this could be what is happening to your packs, if you have not lowered the full charging voltage and are indeed charging to the full pack voltage, then there is another bigger problem. Good luck.
@@GapRecordingsNamibia I have been charging to 56.4v & then floating @ 55.4v. They tend to throw a warning for cell over voltage as they get near floating. I believe I have had similar experiences to what u have described here when I left them float at 55.2v & have increased it a few times to get the BMS’s to reset to 100% SOC, but have recently noticed that they are reporting these decreased Full Charge Capacity readings of overall battery health. The first 2 batteries I received have always showed signs of suspect cells, but the last battery received has always worked well & still reports 100% battery capacity, while the other two have been declining, & I do believe there are suspect cells in the first two batteries.
I am using a 5kw PowMr AIO system to charge the 3 batteries by day 9am-3pm, & then use them overnight for fridges, tv’s, water pump & the microwave, this is a temporary setup for now, as I have 10kw of grid tie pv on roof, I just plug the AIO into a GPO for now while testing things. Thanks for ur response. Cheers
Ok, now I will just be quiet and watch.... Why such a setting should exist, is a mystery.... Thanks Andy.
Had something similar happening with JK BMS, the internal shunt was measuring positive and negative current going into the battery bank (2 banks in paralel with 2 jk bms’s). And throwing an error “abnormal current sensor, abnormal release of current sensor”, seems it’s common with JK but to be fair after restarting the BMS’s haven’t seen in after, might have happened due to rapid changes in current going in and out through bms as the battery banks were balancing out.
Hi Andy, it only happened when the two batteries were connected in parallel. Even did it without any can bus and victron connected. Looked like the top battery voltage was higher and was charging the bottom battery with more than 10 Amps. Reason for it bombing out. Or just my guess
You should make a text dump of the config and put that in git. If you change something, it will be registered, and you can comment why. You can also roll back and push the old config.
I have no idea how you program them. I think the description is not from the BMS, but from the program that configures them and knows that item n sets this or that.
What an awesome idea.
There is a XML file with all the settings which can be imported, exported. Maybe that's a start...
If I remember correctly the BMS’s aren’t identical which might be why Seplos doesn’t recommend connecting them together in parallel.
That is correct and I'm testing why they should not be paralleled. Seplos could nto really tell me...
@@OffGridGarageAustraliaYou are probably the solar industry’s favorite QA department 🤪
Dear Andy, I also have DIY 280 Seplos kits with 10E 200A BMS's, did you found how manually turn offf discharging and charging because I alerady connectet it to the Solarede 3phase hybrid inverter, but neet to calibrate battery and want only fully charge batttery by my inverter?
I'm trying to decide whether to go for seplos BMS or JK BMS for 6x 2.1kWh modules that have, going into a solis AC coupled battery inverter. I like the idea that seplos BMS would do comms with the Solis out of the box, but the passive balancing sucks (although it may not be awful on these 2.1kWh packs which are comprised of 26850 cells). The JK BMS series has such good control, but poor comms. I might be able to run 6 separate JKs with rs485 comms to something like Venus OS, and then send that compiled info via CAN, or via Home Assistant and then output to CAN. None of which I have ever done before.
The critical point i missed here is that they are 51.2V 16s packs and would be connected in parallel either via daisy chain approach or busbars ideally.
Hi Andy, Thank you for the video series. I've a question. I got 16 LifepO4 cells and I observed a 0.4V voltage difference between cells at the bottom. 10 cells were around 3.1V and the other 6 cells were 2.7V. I'm using 150-2A JK BMS. Because of this issue battery pack's usable capacity is very limited. Is there a way to balance the cells at around 2.7V using JK BMS without disassembling the pack?
The JK-BMS can only top balance. In fact, no BMS I know off does bottom balancing.
Are the voltages coming back together when you fully charge the pack? How far do you charge, when does the balancer kick in?
Did you set these vlog during your holidays mate?
Hi, Andy...!!!
I really don't like the fact that you put in parallel 2 batteries with different capacity... I would rather connect them individually to the Link Distribution equipment and go from there...
Also have their respectives BMS's connected individually to the Cerbo Gx... I think they would work better that way, instead of "battling" each other when they are in parallel "internally"... if you "catch my drift"...
SEPLOS doesn't recommend not to put them in parallel in vain... 😄😁
So, good luck with that...!!! Can't wait to see your follow up...!!!
Cheers...!!!
Thanks Andy, I'm not an expert (yet) but this is my main concern about ready-built batteries and this is the very reason why I purchased two from different manufacturers so that I can investigate how accurately the pre-balance the cells. I shall open them both, test each cell and charge them individually up to their maximum capacity. Did you perhaps think about this? I know you said earlier that you do not believe in pre-balancing but that could be the reason for the issue you are experiencing. Let us know your thought on this, please. 🙏
Perhaps the current limiting feature might be useful if the cells are being balanced?
Seplos got zero in the wrong place again and it's really 1 amp current limit , my guess . The fact that the line code tag was redefined and not updated is reason enough to just say no .
OOh, very interesting behavior. Here's the skinny on current limiting. Linear current limiting requires voltage conversion. i.e. it requires a regulator (usually a switching regulator). For example, think about what happens with a current-limited power supply or charge controller. But a BMS only has FET switches and transistor based balancing. It does not have any voltage regulation for the main power paths at all.
This means that the BMS can't actually do any voltage conversion and thus cannot linearly control the charging current in any way. All it can do is the switch function... allow charging or disallow charging. If it were to try to do linear current limiting via the FETs by using their linear zone instead of their switching zones, the FETs would have to dissipate the difference and they would melt (it is like using a bunch of diodes to try to reduce the voltage on something... the diodes dissipate the difference as heat).
So all a BMS can do is switch on and switch off its charging-related FETs, and that is what you are seeing.
There is one last discharge path. When the BMS disables charging but allows discharging, the voltage of the battery might still be higher than the voltage the charge controller is able to push into the second battery, due to the second battery pulling the voltage down. That is, the charge controller is now managing the current going into the second battery and adjusts its voltage appropriately. This voltage might now be lower than the voltage of the first battery.
Thus you have a higher voltage on battery #1 going through a closed switch to the lower voltage on the bus and the first battery winds up discharging into the second battery.
I got one of the 280 ah box and i build the battery and the bms not turning on. when the screen light up it on showing 14v and shut down back by it self.
Hopefully when you get all of the settings figured out you can post the BMS versions/firmware version and the switch settings that make it work best, I have tried all 3 versions and still having no luck
Yeah, that's the ultimate goal. It could be a long way until then...
@Off-Grid Garage I'm working on it right next to you, been trying version 2.7, 2.8 and 2.9 and still running into issues, I still cant even get the BMS to calibrate to the actual AH
What I was seeing appeared to be a conflict between the 2 BMS packs causing the switching effect.
Hi Andy is there any chance you could charge the seplos battery and leave it overnight to see if the balancer will indeed balance over time. It seems that time would work in balancing the cells. In real life most people would check once a week at most.
We've tested this already when we built the Mason battery. I left it balancing overnight and the balancer did not work well either. 100mA is just not enough for these large capacities and B-grade cells. They may be OK when you have true A-grade cells as some have reported here.
I just bought a Blue Sea 1000amp busbar so I can add each Seplos to its own direct connection, without daisy chaining. I have 3 of the 280 Masons and 4 of the 135ah Masons.
Why not the Lynx ?
Have you considered getting some pylontech us5000 batteries? And doing some tests as they mine the lithium & make the whole shabang from battery, BMS and cases plus distribution network.
There's no way pylontech mines lithium
The total voltage of each battery differs too much from the other I think, so the balance current (pack 1 to pack 2) easily exceeds 10amps. That fast that the display isn't able to show up the actual values before limiting kicks in .. again and again (weird swinging as a result)
Hi Andy
Try loosing the com between batteries and try connecting batteries individually to lynx see how they react ! Had the same issue with 2 orient power wall batteries and now works find ! Cheers mate
Why not watch the video before commenting ?
Saw in a seplos video somewhere...
The 10 amps limited charging is a feature used for communication between the BMS and inverter/charger so the cells don't "run off" due to overcharging when the battery reaches a almost full state of charge.
I think this function is limiting amps to give more time for absorption. Makes sense!
Don't take my word for it, I'm not the engineer that design it. 😅
And also maybe the balancing function as also something to do with that function, just a guess.
"run off" at a SOC of 17% ???
@@ltcmdrdata4611 I know!!!! Did saw that. Low SOC...
But I just tried to describe what I saw in the seplos video.
The initiative current limiting charging (Even less than 10 Amps) could be used when the battery cells have less charge and in this low stage of charge in order to protect the batteries from huge charge Amps we need to limit the charge current, this is what once I have read about. Maybe it is already ON by the battery modules manufacturer. The Software does not have any problem.
Nooo, if the cell is on low SOC, it can take all the amps it can get (up until the max charge current as per specs). Not a problem for lithium and no need to charge them slow.
@@OffGridGarageAustralia Maybe the BMS Software developer (Copied or for future protection if needed in... or just having the initiative current inside the software firmware without any specific reason at the time) decided to reduce the charge current whenever the Li-iron battery module have less charge like Li-ion battery modules.
should same capacity batteries not be in parallel? Dissimilar capacity batteries should not be connected in parallel as per my understanding.
Wrong , watch some older videos from here .
Poltergeist was in the garage 😂
With both batteries connected wasn't it possible 10A in total for both batteries?
No more daisy chain :)
Like# 5!
Someone has to make a video on ALL the settings because they really don't provide any info on it
Version 2.7,2.8 and 2.9 are all different, ask for the firmware for these three versions and see what you can do. Very confusing and overly complicated. I like the options that are available to change but depending on which versio you have you have access to change different parameters, maybe they have other versions as well but as of now all I can get are the three I mentioned
Have only tested 2.7 and 2.8. But for my implementation I prefer 2.8 even if I needed to default all my settings from 2.7 and I can't control voltage in 2.8 Reason for this is the charging control with the multiplus works better with 2.8. Anyone tested 2.9 how is that one?
V2.8 fixed a few things in regards to the Victron communication. I haven't tried the 2.9 yet. No changelog of course on the Seplos website or anywhere 🤷♂️ It's all about letting the customers find out themselves.
@Off-Grid Garage 2.9 removes the option to change several of the settings you show in 2.8 (atleast that's my experience)
Beside this interesting behaviour, shouldn't you connect the Lynx busbar with - to one of the batteries and + to the other?
I don't see a reason to do that. This daisy-chain is just a temporary setup and we will connect all batteries individually to the bus bars. That solves the problem.
@@OffGridGarageAustralia If it is temporary then it is ok, but it would reduce uneven charge and discharge.
There sure are a lot of settings that need deciphering.
Heya, it's getting more and more complicated that I know for sure
💙🙏😎
Someday, someone, somewhere, will invent a lifepo 4 system, with only one option. ON OR OFF.
But But But what about the problem from the last video ? Not letting it charge ???
That was the "initiative switch..." it's in the next video...
Maybe the current limit switch limits the current to 1A instead of 10A . That would explain the behavior at a low charge current.
Yes , Seplos has been known to misplace a zero .
Don't worry. It is "SMART" technology.
So far I found out that best way to parralell batteries is just brutal connection to simple busbar. Without any bms paralleling and connecting to lynx or cerbo gx. Everything eles is just additional problems. 😂
Balancer effect ?... with a charging current below the the balancer current capacity, when the capacitor of the balancer is charging from the highest cell, the global voltage drop on the concerned pack and then take all the charging current plus a bit from the other pack in parallel... then when the capacitor release the current to to the lowest cell, the global voltage increase again a bit but less, ... etc, etc...
Power going from one battery to the other would be more than 10 amps.
Yeah, it makes no sense to see that behaviour, even if this is a current limiting switch. Hence I believe it does more than that...
I think you have a scramer on your page
Report it. Report every one that you see.
For some reason that passes understanding TH-cam doesn't include an option for impersonation, but do your best.
Nothing I can do about it. Happens to many channels and TH-cam cannot get it under control. It's very easy to identify as the channel name is completely different to mine. So don't fall for it.
🐸🐸🐸
Don't daisy chain?
as the water ripples 😁
Didn't they say don't connect them? I believe u said that in an earlier video
Go back to 2.0 battery bank much more fun
Not first!
i woud at this point rip out the seplos bms and replace with somthing else
For the same terminal voltage the battery with the lowest internal resistance will take most of the available power which may cause the odd results. Once you have the two 280 Ah packs they will be a better match
FFS.....not sure the experience with Seplos gives me any confidence to install it in a live production off grid system.
The days of a separate charging input is causing indirectly this problem because it is not the case anymore. The single chg/dischg is used on bms's now which if you had a load and a power source(or charger) for this load and and connect backup power source battery with bms,the chg/dischg point can be very close. Some lifepo4 battery mfgrs state that you can't parallel them, depending on the load you pull.I am having this problem with 2 100 amp/hr batt with 200 amp load inverter using clamp on meter it can see the cause of bms to trip off in my case.They just don't like to divide load at times. Have fun.
It was my understanding that you NEVER mix batteries sizes
Why not?
@@OffGridGarageAustralia technically, I don't know why but the manufacturers that I've talked to always have said that it's a no...
I have a 48v 200 Ah 10 Kwh and the manufacturer doesn't even suggest pairing it with another of their models (still 200 Ah 10 Kwh but different brand/grade of cells)
hummm...🤔
1. 🎉😊
Hello! I'm (not) first
Chinese amps are a bit different lol
Yeah, right, that is very true 😁
Lmao. Just plug an play you said. Easy.
That is out of context! I was talking about the Victron Cerbo and how easy everything connects. The BMS are from another world though... the furthest away from plug'n play...
3rd
what a stupid description for the switch ... something like that belongs in some "settings for advanced users "
if only they would pay for a decent translation for once
Yeah, half of the switches and settings make no sense just by looking at the name. How hard can it be, right? They invest thousands of dollars to develop such new hardware but save a few bucks when it comes to proper documentation.
What you want to bet when SHTF the chinese have these products set up to go offline with a press on a keyboard and leave everybody in the dark...
And how do you figure they do that when the BMS has zero connection to the outside world when in operation, maybe they will pop over and turn it off manually.
@@shavermcspud Bluetooth / 5G
SWNHTF = shit will never hit the fan .
Seems the seplos have since day one been continual aggravation. No thanks.
hi andy di you send me the telegram me
It's a scam, don't fall for it. I mentioned this in my previous videos...