Balancing Sodium batteries: active / passive, when to start, top balancing?
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- čas přidán 9. 03. 2024
- I shouldn't have started with the Daly BMS. It is just an annoying piece of...
Well, I thought it would work well with the 4s sodium battery we are building in this video. A simple, small passive balancer should be enough for these tiny 1.3Ah 18650 cells. But no, not with a Daly... It has charge balance AND a huge current measure threshold of 1.1A. This in combination makes this BMS unusable for your experiment. I walk you through the pain😬
I then tested the Jiabaida BMS, the good old Ciabatta! At least here we have the choice to use charge balancing or not. We can test out the balancing of this 4s sodium battery at different voltages, which works great. But even here, the 30mA passive balancer will take a long time to balance out this small battery.
So, next on the list was the JK-BMS. The smallest JK-BMS you can buy... a JK-BD4A8P4P. Perfect for such small batteries. It has a 0.4A active balancer which I turned down to 0.3A (the lowest setting in the BMS). Within 15 min, it fully balanced this battery without hesitation! Of course... it's a JK!
It seems like, we can balance these sodium batteries at any voltage thanks to its linear curves. So we just leave the balancer running all the time, right?
Aehhh, not quite. There is more to it. Let me get the whiteboard...
Balancing sodium batteries seems like an easy task, but there is far more to consider. As a verdict, I would also recommend a top balancing and have the balancer only running when the battery is fully charged to maintain this created top balancing. Running the balancer all the time, is not a good idea...
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It's nice going back to first principles for a new chemistry. Thanks Andy.
You're very welcome! Yeah, I like this testing as well. lots to discover.
Congratulations 🎉 15 years
Thank you!
Cheers to 15 years from Max & Co. !! 🇦🇺 🎉
Thank you very much!
1:09 "SALTY"
LOL!
That is honestly a good sodium cell battery company name...
The Salty 5000 Super +😆
Hallo!! Off-Grid Garage Andy. Super Video, einfach klasse, du bist der BESTE!!!
Thanks a lot!
better education then i got my whole school life!
thank you so much!
*Oh yeah Andy* just racking up the subscribers. Keep up the good job man.
Thank you, yes, it goes fast...
I have run NMC batteries for 4 years, and they are very similar to the sodium ion battery characteristics that you demonstrated. I top balance my NMC batteries at 4.070V to 4.100V (charge cut off), so it would make sense to me that sodium ion batteries are also top balanced
I run my NMC down to 3.500V, and the maximum cell deviation at that voltage is about 50mV. Not bad for repurposed used Nissan Leaf battery modules. 14S configuration, passive balancer, 3mV maximum deviation at full charge, about 100mA passive balance current
Keep up the good work Andy
Thanks so much for sharing. Most people these days have LFP batteries and we all know how to handle them. NMC and Sodium is kind of related in terms of the linearity of the curves and also balancing strategy.
Hello friend, the handshake you have given to each other is also our tradition. Thanks to you, find your own style
Great video. Prices are very good for the 220ah. 5000 cycles. With the curve not as flat as the LFP I'm guessing density will be the key. Thanks for your testing.
Sodium is still a lot more expensive for the same usable capacity. It will be another 10yrs until we see production rate going up and prices coming down.
❤ thanks for testing
Thank you, my pleasure.
Thank you Andy for your great channel! And congrats on your 15th. Thinking of active balancing for sodium batteries. If we take 4S = 12V 220Ah battery and an active 5A balancer and keep the balancer working the whole time... Let's assume one cell is only 210Ah and we discharge the battery with 50A for four hours. From full to empty. Let's assume that the weak cell will lose voltage faster than other cells from the very beginning of the discharge cycle and that the active balancer is effectively only worth of, maybe 3A. So in those 4 discharge hours the other cells could deliver 4h x 3A = 12Ah to the weak cell which is quite enough to compensate that 10Ah the cell was missing. I think this would totally correct the unbalance these cells have. Unless there are other factors I'm missing...
If the active balancer has an efficiency of 50%, during that discharge cycle 6Ah would be lost in heat and only 6Ah would charge the weak cell. So in the end the weak cell had used up its 210Ah plus the additional 6Ah from other cells, that makes 216Ah. Other three cells lost 4Ah each for balancing (12Ah/3), resulting in an equal output capacity of 216Ah. Without continuous balancing the capacity of the whole battery would have been 210Ah thanks to the weakest cell.
The biggest factor you’re missing is load current. Your scenario works fine for a battery just sitting there doing nothing, but what if it had a 0.5C load on it? That’s 105A ! That paltry 3A of balance current will not be doing anything useful to offset that…
@@simontillson482 Like I mentioned in my example I assumed a 50A load, a bit over 0.22C. If I had heavier loading for over an hour, I would increase the battery size. With 105A an active 3A balancer would manage only 3Ah, assuming it has a that lousy efficiency of 50%. That is not much. Addition to increasing battery size for heavy loads I would also get a bigger balancer. Or another 3A balancer connected in parallel. But the charging may take much longer time and then an active balancer may help if you don't have much charging capacity, like in my boat having limited space for solar cells.
@@user-py9bx2bp7lGetting additional balancers is kinda stupid, if a pipe in your house is leaking you dont buy a dehumidifier you fix the pipe.
So dont buy a balancer stay with top balancing and when the usable capacity is too low replace the weakest cell.
In theory this is all fine and true, but it will not work in practice. You cannot move large amounts of energy back and forth all the time. And, as I mentioned, the JK or NEEEEY does only one cell at a time.
Your insights about balancing are most helpful and make total sense.
Would it be true that the required balance current is approximately equal to the variation in capacity, or at least proportional to it?
Say I have a pack made from 10Ah cells, where the cell-to-cell variability in capacity was around 1%, or 100mAh.
Would a BMS with 100mA of balance current suffice? I’m suspecting in reality, less is needed, because we don’t require perfect balance every charge cycle. What is the real variability in capacity (and/or internal resistance) though? Is 1% a realistic figure, or are real-world cells even worse?
The balance current is not related to the deviation of the cells. Any balance current will balance the pack over time. It just takes longer the smaller the balance current is.
Of course, as we have seen and tested many times, a 30mA balancer will not be sufficient for a 100Ah battery, especially not with LiFePO4.
Andy, you are so fascinated by JK BMS, they are awesome, but I recently changed JBD to JK and I found some bugs. My JK measuring current is 25% off. That means my Ah counting is also 25% off. I did calibration helped somehow, but anyway...
Bluetooth in JK is very weak. JBD I was able to connect on second floor of my house from cellar. JK only on first floor and on one place on ground.
Also balancing 600mA is working on only 2 cells at one time, that is 1200mA total. JBD is passive burning 170mA per cell, half of cells at once. 8x170 1360mA total. First is better if there one weaker cell, second for bigger spread of battery resistances.
0314’24/1948h 🇺🇸 Any time JBD BMS, my 6 systems are controlled by JBDs. 8 sold years. 2 became faulty and replaced. 1 was man made mistake. The man was me. The other was erratic, so had them both as choke for Land Cruiser. BT range fantastic, passive balancing no issues. Delta remained between 1~ 4. While charging delta between 15~30 and goes between 1~4? 200A JBD slightly tepid. Thanks for your views.
Jeez, Andy was "salty" on his 15 year anniversary show...🤣😂🤣😂🤣😂 Congrats Andy and Mrs.
Thank you my friend😆
All most 82k subscribers 🥳
So close!
It looks like that the JK BMS with active balancer turn all the energy into heat. Voltage of Cell 04 is at 2.807V when starting and 2.804V when it is finished. So no Energy (=no Voltage increase) was put to Cell 04?
Good observation! I hope Andy will tell us how that happened with an active balancer
It’s because JK use a crappy supercapacitor for the charge shuttling function. It’s internal resistance is so high that it’s functionally less of a capacitor and more a resistor! It looks cool and lets them put the ‘Active Balancing’ badge on the BMS, but fails miserably in practise.
@@simontillson482 I would like to know what Andy of @OffgridGarageAustralia thinks about this 😁
@@AndreaFurlan-ro8cw Me too. I think you could fill several videos just discussing active balancing.
As far as my knowledge goes:
1. Active balancing is hard, in that it’s hard to recover energy from high cells and use that energy to bring up low cells. Think about a ‘flying capacitor’ active balancer such as JK’s tech - you have to connect a capacitor across a specific high V cell, which causes a huge short pulse of current to flow until the capacitor gets charged to the same voltage, then disconnect and reconnect it across a low V cell. Again, a short, high current pulse until the voltages balance out. This is very inefficient, especially when using tiny little balance harness wires to carry those high currents. Therefore, JK (and many others) use a carbon supercapacitor with a relatively high internal resistance, which lowers the current considerably at the expense of further inefficiency in the capacitor, but limits the losses in the balance wiring. At the end of the day, they’re lucky if 30% of the energy being transferred actually gets used. The rest ends up as heat.
2. Most companies are well aware of how inefficient this process is. Conventional resistive, passive balancers obviously waste 100% of balance energy as heat, so ‘only’ wasting 70% is a win, right? Well, not really. Balance energy, whether it’s reused or not, is usually less than 1% of pack energy anyway, so in terms of overall efficiency, it’s irrelevant anyway. A few degrees difference in temperature affects usable pack energy way more than active vs passive balancing ever could.
3. There are ways around the inefficiency problem. Using an inductor in series with low ESR capacitors allows for a controlled current pulse during balancing, avoids the extreme current levels found in most active balancers when effectively shorting a capacitor across a cell, and can transfer energy up to 90% efficiently from high to low V cells. It costs a bit more to implement, and requires higher frequency switching (because each pulse is shorter and transfers only a small amount of energy) but it’s totally possible. This is known as a switched LC circuit design. Again, I don’t think it’s likely to be used often, because the energy saving just isn’t relevant or worthwhile.
Still, I’d like to see if anyone does think active balancing is actually worth the trouble, including Andy.
Hello my dear, I'm from Brazil. I consider your channel one of the best in the world in renewable energy. You serve as a great inspiration for me and many people in Brazil. I would like to know if you assemble these lifepo4 banks for yourself or for customers? and, is there a video of you showing how batteries are discharged in your everyday life at home? Congratulations and thank you for sharing so much knowledge.
Thank you my friend. I have lots of videos on my channel showing the daily usage of these batteries. I only build them for myself, no customers. But I share ever single step, so everyone can follow that and built their own battery.
I was able to calibrate the Daly BMS to measure small currents as well. It maybe depend on the FW as well?
Hi Andy, thanks for the super videos. Wondering if you have done research on charging the cheaper stand alone lithium batteries eg Kings 200Ah. I have watched your vids regarding setting the float equal to absorption and setting both to 3.45V. I have set tail current 0.5A slightly above the low constant load of two cooling fans. 0.4A. Not sure if victron 100/50 works out what is load and what is charge. Anyway question is, will charging at 3.34V still allow the batteries internal BMS to keep the battery balanced, or will they likely drift out of balance? Or will the low tail current at a fixed voltage keep them all in balance? Regards Jack
It all depends what battery chemistry you are using. With LFP, you need to be at 3.45V or higher to balance. 3.34V is not enough for the cells to show a difference.
The contempt you have for Daly is barely contained : )
Who doesn't like this red?!
I bought a jk 200 amp bms and going to buy 280 amp eve cells after watching your videos. What box Will boxsuit the jk bms
Depending on the needs you could do a top balancing like you are suggesting but also a bottom balancing. Of course you need additional electronic that can start and stop the balancing depending on the cell voltage. For example starting when above 3,8V and also under (for example) 2.2V
What is the bottom balancing good for? It will destroy the top balancing again and vice versa.
@@OffGridGarageAustralia We don't want to top balance because it looks even. We do it to maximize the available energy by charging. Making in addition a bottom balancing helps to maximize the amount of energy when discharging. The capacity of 8S, 16S or whatever pack mounted in serial will then not be the lowest cell capacity anymore, but could (depending on load, current of the balancer, starting SOC of bottom balance and difference in capacity of the cells) get close to the average capacity of the cells.
Andy, when do you get a 100ah or larger 12/24/36/48v pack in silicon for testing? Plans for silicon in your storage system or keeping with lifepo4?
Silicon?
With an efficient active balancer continuously balancing on sodium cells, anything you can transfer into the weakest AH cell will help keep battery pack up longer, increasing the amount of total battery AH's extractable before lowest cell shuts down the BMS discharge.
I tend to agree. I think Andy has missed something when he said for a 50A discharge you would need a 50A balancer. If the cells are 100Ah and one is 90Ah, the difference is 10Ah so a balance current of 10A would after 1 hour of discharge, make up the 10Ah deficit. It’s not entirely accurate but you get the idea.
Nope, a 10A balancer will not be sufficient. It all depends on the load current.
Hi mate is that your 81 birthday in that case i wish you many more years!
This is my 81000 birthday. That's how old I'm feeling when I use this red BMS!
Hi Andy, the Daly pc software has much more parameters to set then the BT app version.
Yes, I know. We will have a look at this at some stage.
Agree 100%
could I split a computer power cable to wire the negative battery terminal to the B- pad on the BMS? Can it handle the amperage?
Have you seen the announcement of Noark? They will be releasing rebranded inverters from DEYE, Im buying a 12kw Deye 3 phase, but i hear a lot of good stories about it.
No, haven't seen it...
Hey Andy. What battery tools you have in wall right next to 81000 ?
Ozito garden tools, line trimmer, leave blower, ... got the whole series from them including a small chainsaw which is awesome.
You can configure the minimum current resolution to fit via pc software..
I think my biggest concern is that those BMS are bigger than the battery pack, which just seems wrong.
Very inefficient, but I suppose you could use a powerful boost converter and just parallel the cells.
Yes, they will be bigger but less efficient? Why? I think they will work fine with a small battery. We will test...
I bought a JK 4-8s 100A and paid almost €42 during the sale on 11.11
Crazy! I bought like 4 of these 40A BMS that day!
I'm already using the JK BMS on 3 of my batteries but the 4th one has the Naff....Daly on it, although it does work is hopeless at balancing I was at 500mvl deviation at one point !
Yeah, I don't know. They still produce these BMS like 10 years ago. 30mA... I mean🤷♂️
Heya, 15 years is a long time already nice. so the soduim batteries have more or less the same charge curve as the li-ion 18650 cells
Yeah, they are similar in behaviour in terms of linear curves and balance options.
The LFP cells are also "linear" between the 95% - 20% SOC but that doesn't mean we can balance in that "Linear" range, because the linear range is too Flat - meaning voltage doesn't tell us SOC. It is not just that Sodium has a linear relationship between voltage and SOC, it is also Steeper such that voltage varies with SOC in a meaningful way. Keep in mind cells at rest vs cells under load when attempting to predict SOC from voltage.
Hahahahhah! the order of the cells, good one Andy
My OCD😉
And next, NaIon Celltesting? Gobelpower has a 50Ah Cell online since a few weeks! :)
I'm looking at 220Ah cells at the moment. Prices are still high but for the sake of testing... why not...
Thats why i love Ant bms, balancing during charging means that only the cells who are lower get extra, no balancing through the all the cells. They named it Balance different.
I have an Ant BMS here...
i love the fact how many STUPID you have to repeat for 'this" BMS just because I understand how frustrated I am when working with "this" BMS. I call it "the dumbest Smart BMS". I think you should as well. minutes 16:21 just made my day.
Hahaha, great!😄
Hi There. I have a question please. I have one Ampertime basic battery and two Li-time mini batteries, all with 100A 12V ratings. I would like to connect them in parallel, but the manufacturer advises against it due to differences in BMS and battery cells between the two types. What do you think?
Thanks for your question. If they are all LFP batteries with the same chemistry, same voltage rating and each has their own BMS, you can parallel as many of them as you like. The BMS of one battery does not know anything of the BMS in another battery and in fact, it does not even care. There is no downside of doing this.
@@OffGridGarageAustralia thank you so very much for talking your precious time to answer my question. I greatly appreciate it very much.
It's well known that LiFePo4 should ideally be stored at around 80% capacity and very low discharge or charging to 101% may shorten their lifetime.
How does this compare to the sodium battery type? Is there any data about optimal storage or optimal state for them to be in? If only a certain part of the whole capacity (aka voltage range) was used, should it be either the lowest part, a middle part or the highest part possible?
Viele Grüße und Danke!🇩🇪
What minimum balancing-start voltage do you use for LFPs?
Start at 3.45V, that works best.
JK_B2A8S20P ver 11.38 they add new things like UART and CAN in option . Anybody tested?
3. zu werden nachdem vor 26 sekunden das Video gestartet wurde, Respect
4th place!😁
@@OffGridGarageAustralia Mist🙃
Are you going to build a salty 8 battery ?
No.
Andy, is there anything that is called "spare battery"!, there is never enough batteries or solar panels! At least never enough for Melbourne Sun.
That is true for that crazy weather down there 😄
i must sat that the only way i see these sodium btteries being attrative for power storage is in huge cells and much cheaper than litium(as they seem to have under half the capasity of litium)
but to learn about them is still intresting
Grid and home battery storage if they are cheap enough. Everywhere where size does not matter, I would say. But lithium is here to stay and will NOT be replace by sodium batteries.
im looking for a 15-25A programmable BMS 4S any recommendations looking to limit maxx voltage to 4.1V and min voltage to 3.1V
Well, I've shown the small 40A JK BMS. Link is in the video description.
@@OffGridGarageAustralia thanks i must have missed this
0:10 81K BOOOOOOOOOOOOOOOM!!!!!!!!!!!!!!
UUUUUUNFORTUNATELY, you will need to change that to 82K soonish! LOL!
Or, I take it all off an we will never know😄
Need more cells so you can test inverter heating when using Na vs LFP during discharging.
I have a 12V 50Ah Sodium battery for testing.
@@OffGridGarageAustralia I predict you will get less usable kWh out of it because the inverter will have higher losses due to lower voltage.
@@ToddDesiatoWe will see how this works out.
@33:50 I'm sorry, but your description of the 50 amp load requiring the high cells to deliver 50 amps into the low cell is incorrect.
If you have a 50 amp load on a 16s pack of cells, each cell is only contributing 3.125 amps. So each cell would need to contribute 208ma of current to keep the low cell from going lower. A 4amp active balancer can easily handle that.
No, that's for cells in parallel. When cells are in series all cells are delivering the same amps as the load is pulling. Because they are in series. They are contributing smaller portions of the voltage, but the same amps.
@@junkerzn7312 Yes, you’re correct. I was confused. My system is a series and parallel where I have 4 cells in parallel and 16 sets of 4 to make a nominal 48v and I’ve always considered the sets of 4 to be one cell. I have one balance lead per 4 cells in parallel and they behave as one cell.
My apologies.
That being said, Andy’s system has 3 sets of parallel on the “battery shelf”, so a 50 amp load would still only be 16-ish amps from each.
Agreed that top balancing is the way to go even with sodium batteries.
Yes, makes sense!
Maybe another thing to consider when always balancing is the round trip efficency of sodium batteries.
What is that?
@@OffGridGarageAustralia The reported round-trip efficiency of commercial sodium-ion batteries (energy out/energy in) varies depending on the specific discharge rate and internal resistance I'm the batteries, but it generally falls within the range of 75% to 92%. So if there's a lot of cell balancing rather than topping off, then pulling from one cell to charge another with both averaging 90% round trip efficency adds up like 90% × 90% = 81% round trip. Or with faster charge/didcharge at 85% per battery it's much lower at 85% × 85% = 72.25% to charge one battery by discharging another.
Andy, Daly 4S sleep wait time setting should be set to 15300s to bypass sleep. 36000s is used for all other Daly BMSs but doesn't work on 4S.
I guess, that's in their documentation, right?😬
well in theory the sodium ion cells can be discharged to 0V, if the load can handle a really wide range of voltages you probably can discharge until all cells are completly empty 😀. But no idea how the cells work at 0V and what their resistance is then.
We will find out soon!
💙👊😎
🙋♂️
If top balancing removes energy capacity from the weak cell, then why not bottom balancing instead?
All equipment on the market does top balancing. Nobody does bottom balancing any more, that was before we had good BMSes and safety electronics.
@@OffGridGarageAustralia Hypothetically speaking for Na chemistry, perhaps bottom balancing is better though?
@@alexsimmons1803 What equipment/device/electronic would you use for that?
@@OffGridGarageAustralia Presumably none, but then it would seem Na batteries will need new equipment specifically designed in order to use them to their full potential. e.g. BMSs will need a default Na option (like how you can choose other battery types now), inverters need to be designed to use a wider input voltage range etc.
It was a matter of curiosity. For now I see limited application for using Na to power our homes. Niche applications sure.
@@alexsimmons1803 Bottom balancing is a relic from 15 years ago when no BMS or balancers were available on the market. To safely charge a battery, bottom balancing was used. Nowadays we have a lot of BMS to choose from which will not only keep your battery safe when charging (voltage, current, temperature, drift, SOC, ...) but also balance them at the same time fully automatically.
Yes, I agree, sodium will be for niche applications. It will not replace lithium.
81.7 😊
At least the Daly BMS has amazing cooling fans... 🤣
I like the red colour!
If you set the Daly sleep waiting time to 15300s, it never goes to sleep. I have not hit the button to wake it up in 3 years.
That makes sense. Thanks for the tip😉
@@OffGridGarageAustralia I have no idea why that number was picked.
Normal ,si alguien piensa en baterias lo primero que dices es pásate por off grid garaje allí esta Andy
Like# 10
This is more like 25, Paul!😬
@@OffGridGarageAustralia there has to be some delay, I report what I see when I click the like button
Just about any point of time. That charge curve was not entirely linear so I'd start balancing at 50% SOC, but basically... yah, that little glitch just below 50% probably doesn't matter.
So I guess that means the balancer can just stay on pretty much, except we don't want the balancer burning energy all the time or while discharging. We probably can't depend on the balancer type only balancing while charging as a general rule of thumb, so I would still choose 50% SOC for the balance start. As a rule of thumb.
The top-balance argument... not sure I buy it completely. Even if the cells are mismatched by that much (10%+), that mismatch will be cut in half above 50% SOC and be cut by 75% above 75% SOC. I don't think it will have that much of an impact for balancing that happens in the top-half of the cell.
-Matt
So, a charge balancer is the way then...
Hej Andy du er bare den bedste af de bedste, og stort tillykke med alle dine ONLY FANS
Neeeeeeeeeeeey!
No NEEEEEEEEEEEEY!
I don't know why it doesn't have both options you should be able to set that you want it to balance when charging and not when charging both
No choice with this Daly BMS...
You need to move to a cold climate. Australia is no challenge for solar…
Australia can get very cold in some parts
@@nicod974 oh believe me I have danced with Matilda
@@nicod974 -40 Celsius cold?
👍👍👍
I have one jaibada 100a 21s bms connected to 105ah battery the issue with this bms need calibration because voltage readings for cells is very very off, another thing it is designed for lithium ion only calculating state of charge by voltage and you cannot depend on its soc indicator 😅. But very good balancer It can balance 7 cells at once with 0.7 amps total balance if you put all the cables under the clamp meter😊.
Hahaha, it must be a Ciabatta-BMS🥖😄
You are able to change current reaolution over pc application for Daly bms
intro: the australian germanic beer litium munk , does his traditional thanks to his disciples....
JBD SP14S004 costs $12 only. and much more energy efficient than jkbms for smaller batteries
Bisher konnte ich alle Dalys mit der PC Software anpassen, was die Auflösung der Strommessung angeht. Nennt sich in der PC Software "Current Wave". Ging bei mir runter bis auf 0,2A
That last balancer did not act as an active balancer, it just discharged the first 3 batteries, the final battery volts of all batteries should have been 2.847V if it was active balancing. The last battery was not charge at all. Otherwise good video.
Because the sodium batteries can operate at such a low voltage, the JK bms might fail to operate at those low levels too…… but so will most of everything that’s connected to it.
That could be the case, true.
Andy, just a correction, if you're discharging at 50A as per your example, you would need a balancer in excess of 100A as the active balancer first charges the capacitors from the highest cell, and then discharges into the lowest cell - these two actions happen sequentially as you're already aware. With the 0.4A active balancer, I would be surprised if it were able to sustain a 0.2A draw with one cell close to the cut-off!
Yeah, that's what I said, the JK works only with one cell at a time...
@@OffGridGarageAustralia at 34:00 you said that a 50A balancer is needed
@@Stefanfj Ah, right. It's these little details I build into my videos for people to discover. Only if one pays close attention can find them😄
Mr funny disconnect above 45 degrees? Wow. Yes I know you misspoke
🐸🐸🐸
Hi
Gold for Greece, once again!🥇
More videos please 🎉
@@PlexMulti coming...
Jeez, who's a Salty Dog then eh? Good stuff about SiB balancing - point being if its used for an EV floating between 90-10% SOC does balancing matter till one cell hits the end stop? With regular over top ups to 3.8V, might be a month before balance becomes an issue? You can get too anal about blancing. But ere Andy you are forget the major issue here (as is all the Uber Hype) that is the dramatic drop in Volts from ca 4V to 2V. If you are powering a golf cart with 100Ah 24v. Your speed around the 18 hole course will drop from 10km/h to 5km/h - thats a big difference. You cant just add a boost converter to compensate , not for 50A - 70A required.
I think it's a combination of internal resistance and capacity. My experience is with primary cells, so part of that doesn't apply.
Aber! Wird bei einer Landung von 50amp nicht die Landung durch den den Balnacer auf 51amp erhöht?
A balancer takes current away while charging, it cannot add it.
Cell labeling was done by Andy2. Not good.
What's not good here, eh?👁️
@@OffGridGarageAustralia Andy2 didn't consider the alternate cell direction in cell compartment. You should not commission Andy2 with such responsible jobs.
@@stephan.scharf ah, right. You're even more OCD than I am😄
29:38 “so dumm” oder “sodium” ?
I'm not sure yet!🤣
First!!!!
Naah, 🥈
@@OffGridGarageAustralia😢
37 degrees again down here, no clouds. I am looking forward to the change of Tuesday.
You had 19° today. How can people live there???😬
@@OffGridGarageAustralia 27 degrees yesterday here. lol