Cheap 120Ah LiFePO4 Al Cased Aliexpress Cells: Are these Grade B?
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- Опубліковано 7 вер 2024
- New/Matched Cells from Aliexpress (sponsored link): www.mobile-sol...
The listing I bought these batteries from: s.click.aliexpr...
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FTC Disclosure Statement and Disclaimers:
Every video includes some form of paid promotion or sponsorship. Some links on this youtube channel may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. My videos are for educational purposes only. Information is subject to change/update at any time. Electricity is DANGEROUS and can kill. Be smart and use common sense :)
DIY Solar Power with Will Prowse is a participant in the Amazon Services LLC Associates Program,
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I bought these exact batteries last month. The ones I received were more closely matched than what you received. I suppose its luck of the draw. They work well enough for me and the price was right. My application is for my RV which I only use a few times a year. Lead acid batteries wouldn't power the microwave through the inverter for more than a few seconds. High current with low voltage drop was more important than meeting target capacity (haven't tested yet). Still, I appreciate your review.
Will I’m so happy you stay in the range of helping us on the mid to lower levels. 👍🤝. Testing the AliExpress dispute process for us all to know is just so perfect! Thanks SOS
You are getting your packages from an intermediary shipping company, this is normal and will happen every time you choose "Aliexpress Standard Shipping", here in Poland the company name is Sinotrans, probably from the same Sinotrans Changhang Group as your US shipping agent. It is loads faster in my experience than any other free shipping method from Aliexpress. It is basically a dedicated logistics company for Ali.
I just ordered four of these cells. Lowest price in the world and free shipping makes them half the prize of any competition, so I took the chance.
I expect them not to be matched and plan to bottom balance them. This way at least the weakest cell won't be destroyed. I will have to live with the weakest cell determine the total capacity, but to the price, I can absolutely live with that. Exited to test them when they arrive.
Rudy
And?
Finished hooking up 300 watts of renogy on my van...….works great ……….I have a basic electronics background but this Solar was all new to me …..THANKYOU for all your help
AliExpress Is going to call you the battery Nazi love it when they get checked. Keep up the good work.
No sales for you (aliexpress),
NEXT!
lol.
@@stevevelobahn1814 no more sales for A. Express
Lol….”No Batteries for YOU!”
Thanks for this instructive video, once again . I’m just dreaming of another tutorial of « how to test your new cells in depth before assembling » . I know there are some informations in many videos of yours , but for a newbie like me it’s often too fast for me to understand how you do this. An all in one tutorial would be perfect ! 😊🙏🏻
date changing in the meat packing industry is common in the USA. they repackage the meat in a new box with a new date and then resell as fresh. they need more government and public oversight as well.
Will is "The LiFePO4 Market Maker"! Watch prices rise and fall according to his reviews! Cool. The Lion of Battery Street.....The Warren Buffet of Batteries!
You have Huge information we all need and go deep into all the "scams" THANK YOU!
This guy is doing AMAZING JOB for all the DYI ppl. 👏👏👏👏
Will I'm watching you to start learning more about solar systems and really like how much information you share that is easy to understand.... how do 55 people not like your video??
Aliexpress staff
You can now get the 280 Amp hr for the same price!
Yep...4 lipo4 280ah for less than 400 bucks...lipo4 is the 9nly way to go for large systems
I’ve seen the 280 Ah litokala cells on AliExpress. Has anyone rolled the dice and ordered some? Are they any good?
@@saxet9049 AlliExpress has to many scammers, there are reputable companies that have them
@@samanthapowell5882which are those reputable companies?
One of the most important and greatest channels online bar none
Will is a genius and a savior
Merry Christmas Will. 🎄 Bless you for all the info you give for free, and everyone who appreciates what you do, needs to buy your book. If no other reason to show their appreciation.
Got one
So far I have narrowed my go to battery references to you, and Jehu García, I like his contraptions and projects and your brash, straight to the point analysis. You are obviously not married to any sponsor, I especially like when you say, "I don't care!". For solar generator analysis I add Hobotech.
Buying from China Aliexpress or other platforms is very tricky, the sellers very often send different products, damaged or not working or working only for a few times or even never send anything at all. The sellers hope that customers will forget after 2 months and after that you cant apply for refund or any warranty. Be careful and dont buy from shops that have random name for example shop123456789 etc its gonna be very likely fake shop. The issue is that anyone can open shop at Aliexpress and if they get bad reviews they just open new shop. I have bought dozens of different batteries and other products from different sellers and every time something is not as they declare in product description. Recently Ive bought NCR18650 classic green Panasonic 3400mah almost 200pcs and all of them are total fake with only 1000mah capacity and weight is only 35g instead 46g.
Did you open a dispute? Did you get your money back?
I would be super pissed. That is significantly different.
@@xavierpendrag0n Im opening several disputes. Im testing every single battery in kapacity tester and measuring the weight of all of them. All the evidence is on the video and photos (its a lot of work btw). So far first dispute Ive ask for full refund, the seller said "my friend the batteries works fine, I will refund you 3$". So I have refused the offer and argue that the batteries are only 1/3 of declare capacity so I demand 1/3 of the price to be payed for the order also I showed comparison with other batteries with 1000mah. So far Aliexpress refunded me for the first order and gave me my demanded 2/3 from the price but that was just first small order of 20 bats. Im opening disputes slowly one by one cos I dont want Aliexpress put me in some blacklist. The batteries are total shit you can feel it in your hand, the material feels like cheap alu instead of thick metal and they have very low discharge and heat up a lot, so Im afraid they can be also dangerous.
You would think there would be a checkpoint for products that come from other countries, to make sure they are real and not fakes. Not so much I take it.
@@herbertwerner2287 Well Im kinda fucked cos today Aliexpress refused to refund me and they want me to send the batteries back to the seller on my responsibility but I have to pay the shipping which is ridicules because cheapest shipping is almost 100$ for each package (I have few of them). Now Aliexpress will not talk to me anymore about the dispute and the seller doesnt give a damn about me which means if I return the batteries I will lose the money I have payed of the batteries, the shipping money and the batteries it self. Also the packages 7 of them have name of seller "jack" so its pretty damn fake name... the 2 stores I have bought the batteries are named: Shop4052003 and Shop3200004, stay away from them.
Hi Will, great video once again. When assembling cells into batteries, particularly when the are cheap or used, check the internal series resistance of each cell. You'll see any variances in matching this way and you can easily spot a dud before you spend time doing discharge testing. you can also get a feel for how 'Used' used cells actually are. Merry Christmas from the UK.
Here's an idea for a test.....(maybe it is already stated by some other viewer)
Put two solar panel from the same maker next to each other. One mono one poly, how some data logger and update every month their output. Let's see if two panels from the same company, a mono and a poly , with the same surface area, in the same weather conditions, will produce same or different output. :) you can have a monthly video and viewers and you can discuss your findings , we will have some numbers and results, and we will all be happy ..win win :)
Best channel on the internet on the subject. Will is the man! Thanks bro!
Just found your channel, stoked. Great info. I'm a solo sailor and my boat is self sufficient. I have AGM batteries now that I brought new 2 years ago so they still have a some life left in them but I'm gathering info for when I'll swap to Lithium.
Cool tee. I've been staff photographer for Volcom Snow the past 15 years.
I have the same cells and after running capacity tests I only have 118ah. Ok for now in that it was my first build. Like you said, you get what you pay for. Next project, I'm going with the calbs or brand new aluminum case cells.
Hello Will.I want to build a battery bank with cells like these just 110Ah grade A.The problem i found in the manual of the batteries is this:"After each brake charging, the battery needs to rest for a certain time, which should be equal to or
longer than the duration of the pulse charging. During the rest, the battery can be discharged in low rate,
or in a non-working state. But in the rest period, the battery is not allowed to pulse recharge again."What i understand from this is that if the battery charges for 5 hours it then needs to rest for at least 5 hours if not longer.And if i am using my solar setup during the day and if a cloud passes and i draw from the battery it will not be ok for the battery?
Thank you for all the amazing and informative videos.Wish you all the best!
Dear Will!
Thank you for your great videos! I just bought 4 200Ah LiFePO4-Cells from Aliexpress and after watching this video I removed the sticker and guess, the warranty button was also scratched. Now I will make a capacity test and already excited, how high the capacity is. If you want, I can tell you the name of the seller.
For me this is like listening to rap. I have no idea what he's saying but it sounds really good.
Jimmyjoan I think is the posters name but they said it very well for me, I learned so much from this video and a couple others from you I am almost ready to go at a build myself.
David Poz as Will has mentioned in several of his videos has built several batteries in his videos between the two of you I have lots of confidence to try it myself.
I really appreciate your work so much. Your honesty is rarely seen these days when I was a young man it was just a way of life for most now its become pretty rare something I truly appreciate more than I can put into words.
You nailed it on the head when you mentioned the price rise after a good review and drop in price from a respected professional reviewer such as yourself. One reason I won't jump into this. This happens on Amazon, Aliexpress, eBay and everywhere The price rise in just the past year (almost doubled) for even the lead acid's not to mention if you're getting new, used or just plain junk. Going green or trying to as much as possible is keeping a lot of us out. I am sure probably 95% of the world is locked out of this extremely useful project not to mention local codes, laws, regulations trying to stop you and electric company's putting up roadblocks every step of the way.
As much as I enjoy looking at and learning from these videos, the one thing that aggravates me is when you say this is cheap or that is cheap when it really isn't compared to what you actually get and then the replacement costs of nearly everything.
I think in one of your videos you said that a nominal overall solar system would run about roughly $40,000 with a shelf life of about 30 years. We all know that 30 years is pushing the whole everything to it's limit. Failure of everything with the exception of the solar panels needing replacement a few times over during that 30 year period. A good charge controller, 48 volt 240 volt a/c inverter and batteries are the weak link and replacement costs are NOT CHEAP. I am also not in the income bracket that I can fork over that kind of cash.
My present monthly electric bill runs between $70 and $100 (@ $0.11 Kwh) with the summer months, of course, being the exception but even then we manage to keep it below $130-$140 at great sacrifice. My 30 year cost for being forced to use the local electric company is below the cost of going solar but we all know that. I really wish this going green thing wasn't such a scam as it would be much cheaper in the long run. Even a small, say 1000 watt system is out of reach. Just 400 watts took me a year and not really contributing to our reduction in CO2 footprint. I do have enough wooded land that I think makes up for our contribution though. 3 times over probably. I really wish I could build a system that could generate the 14 to 20 kW we use daily on average. It's just the cost that is in the way.
Anyway, I do enjoy your videos and appreciate all the useful information and your effort. Also MERRY CHRISTMAS and HAPPY NEW YEAR to everyone.
I picked up those exact batteries in Q2 2019 and got 8 of them at a supposed 90AH per cell @ $600 so I think that was a great deal at the time. Love your channel
Jack Ma Yon is the founder and former CEO of Alibaba. in China.
Funny to see his name on your B grade LiFePo4 cell packing slip. He has tons of UA-cam videos and is a Global Superstar.
6:01 “You have a warranty barcode”
QR-code 🤓
Did I just win the most pedantic comment award?
QR code is still a barcode. The bars are just very very short. I must deserve the most pendantic reply award.
You both deserve the ceseranantum medal of all time. If it were still given.
While they may show as 80% capacity, it would be more interesting to know how many discharge cycles they have left in them. Perhaps a good test to do on an upcoming video.
Yes, do LiFePO4 cells degrade faster the more cycles they've gone through? That's a big factor to consider in terms of whether or not 80% used cells are worth it.
Thanks for reviewing those cells partner. I was considering them and would be pretty disappointed.. Thanks for saving us the grief, good sir.
Wills analysis of the batteries he examines is excellent. The bad part is that we'll never get the price he did because they jack them up after they realize Will made a post on their battery.
Good luck with AliExpress return. I don't buy from there, anymore, because there are more bad sellers than good. Sadly the good sellers suffer from the sellers that try to make a quick short term buck. You are doing a great job exposing the crap from the good stuff and showing what's behind the curtains.
Thank You Will for performing such a good service for everyone.
Given the amount of time that has passed since LFP went into use in various applications, it is of course no surprise to see used cells come onto the market. While there will be a certain amount of "Sheister's" out there misrepresenting the products, we will also see more reputable dealers in Used Cells who actually performance / capacity test and match cells up.
Is there any way to come up with a list of Reputable Used Cell vendors ?
Hopefully your continued Forensic Research will also get around to checking out the Discount ShunBin battery packs as well.
My experience with AliExpress refunds is that if you provide solid evidence they will judge in your favour. If the product is still usable I ask for a discount. If it’s not usable then I ask for a full refund without having to send the item back. I’ve never been disappointed.
My disputes concerned much lower value products though.
I’m curious how this case will work out.
I've had a different experience recently with Ali express. I was sold something that electrically did not match there advert and I had also contacted them prior to shipping and had the messages where the supplier lied and they still sided with there supplier. I did get a small refund but that won't be much use to me when the item fails
Conservator and Djbart thanks for sharing you AE experience.
djbart78 Hi,
Just curious. Did you add screen prints of the messages to the dispute?
Yea put everything in the first time, then they asked if I had anything else. I actually contacted a rep and explained it all and said what else can I tell you? There advert was incorrect and they actually lied to my specific question. There response was that if I didn’t have any more information then they wouldn’t look into any further. I contacted them again and the next rep listened and said he understood the situation and these instances has happened before, he would escalate it and get back to me. The next day they just processed my £20 refund on a £250 purchase and that was that. I’m in the process of claiming off my credit card company. I even emailed them after and said hold on I never agreed to the partial refund for all the stated reasons and never even got a reply to that
I think my issue was more down to a lack of understanding, in that the product was advertised to work on 50/60Hz and I asked the specific question is it both 50 and 60Hz. They answered yes but when it was delivered it was quite clearly 50Hz only. While this will work at 60Hz where I live, I have had numerous products that either fail to work or burn out within a month or 2 due to the frequency difference when running a motor. So while the unit potentially will work, it could fail within a month and I would be then out of pocket. I explained all this and said I wasn’t looking to keep the unit, quite happy to return it if they paid the shipping as it was not as advertised or spoken about. If they had told me it was 50Hz only I wouldn’t have purchased it
I looked at these just yesterday off one of your links and it said 80% telling me they were used. I have been watching a lot of your video's for the past year and I have noticed that when you first post it the price is lower than a day or two later so I figure they are watching your post and up the price after they figured out that you recommend something. So now I am checking your video's to times a day. for the batteries.
That SinoUSA may be the Hong Kong transshipping point used by the CALB distributor as well.
I was reading the CALB 8x100AH description. They said there that they ship the batteries through Hong Kong, then to a US port, and only _then_ via UPS etc.
I am looking for interlocking harness for my prismatic cells they are white in color. Will Prowse you have taught me a lot about solar and LiFePO4 batteries in the past year and I THANK YOU big time. I've gone solar when camping even though power is
onsite. Fellow campers are very interested about my set up, I tell them to go to your UA-cam channel.
That is awesome!!! Thank you 😊 yeah a nice harness would be great to keep cells orderly. Good idea
im in way over my head on this but I watch your vids and sometime I would like to do a solar install on my rv, great vids thank you for your work you do have a great day
Thanks for testing all these products and showing them to us.
Will, even though I have never meet you I still love yo...what you do!
You seem to be onto everything lithium! Fortunately for me, it just so happens that I'm building a sprinter van motor home...and I need a battery system for it.......A big one or as much capacity as will fit in the van.....I was thinking a 24 volt as most of my appliances are 24 volt and 500-600 watts of solar plus alternator and shore power charging @ 24volt...
I am an electronics tech from an early age but lithium tech I have yet to catch up on but am on the way thanks to all your wonderful vids, thank you....
My question is what cells would be good to produce 24v at as much capacity as practical for the space I have available....the space is not something you need to worry about....I need good reliable cells from a good reliable seller and a good BMS for them.
Thanks for your time and your videos and its good that you're ripping apart all these Chinese batteries for us to see inside!! Something we all need to see before we buy.....! Your the Battery vigilantly and this will single handily lift that standards of Chinese lithium batteries for us all!!
@@MotorizedBicycleRace Hey thanks for that. I'm in Australia and freight may be prohibitive. Also Lithiums in Australia are over the top price wise. Also I like the idea of cells as I can buy a few and build them up over time.
@@des2610 remarkable isn't it, Australia with all that lithium, space for huge buildings, sun for solar and no giga-battery factory to make affordable Li-batteries for Australia. Instead its all shipped overseas.
@@telocity Such is the dictates of the elite for the NWO....
I was looking at an ad for grade A aluminum cased cells on Aliexpress and the pictures of the terminals showed really scratched grade B looking cells. The pictures!! It makes me wonder. The language of the ad was very convicing for A grade.
My wife and I we pay 5 dollars per month on electricity bill. 1kwh costs about 0.11. You can also teach people how to not waste electricity. One trick I use is the fact that I have painted all my walls in white colour to better reflect the light. This way I can use 2 to 10 watt led bulbs among other tricks.
Another great video Will! Keep them coming as my knowledge is very limited with these cells and solar hookups. I am am EEE but technology blew me by and in the process of building an off grid shed as a prototype for something larger
The first cell did not had the same state of charge based on initial voltage measurement. If you have top balanced the cells before the test they may have been quite equal.
My A123 cells had the model number removed (easier as it was just paint so cleaned with alcohol) and I think they purchased the cells to recycle or destroy (not resell) and so they remove the original identification markings so they do not get in trouble for reselling them. If this are CATL then they do have similar policy with A123 and do not sell direct just to large system integrator's like EV makers not for resale to public. They may be quality rejects for some reason and maybe a bit old stock but should be fine.
Since it takes forever to cycle them thousands of time to see how they will degrade a good indication of quality is to measure (calculate) the internal DC resistance. To do that you just put a known small load say 10A measure the voltage of the cells at the terminals then switch a large load say 110A and measure the voltage again then subtract those two voltages and say you get 50mV then you will have 0.05V / (110A-10A) = 0.5mOhm and that will be a fairly good result. Another type of cell that has the same capacity and double the internal DC resistance will heat more internally when used and most likely will last less.
And about the connectors on those cells they originally are spot welded so the re-seller tap drills them so they can accept bolts for easier DIY use.
I really enjoy these videos. I hope you keep them coming. Very educational. I'm wanting to go solar and or wind. I'm learning a ton from you.
Those cells new look like they are almost half the size for almost the same capacity as the CALB180ah I bought just recently. Even though I missed out its Nice to see that densities are increasing because LifePo is still the safest chemistry but weight is always going to be important to vehicle users.
measured capacitance is with less amperage at longer time ,,100 houers chischarge maybe ? . also try to measure capacity only that 3 best cells together and that weaker alone
Good work and always enjoying the Your demos and slow learning the repetition is a good thing oh thank you very much will
i got a battery 100ah from ali express one year ago and im still happy with it
I'm so glad we have your help. You're very important to us, Thx.
Just went to the Renogy site - went to buy a $899 battery, added the $99 battery monitor. Put “WillProwse” in the discount box, got $10, which is 1% not 10% as advertised... love your work Will, could be an honest mistake on Renogys part. Perhaps you want to reconfirm the discount available...? Thanks
Interesting observation you made on the senders name (Jack May). The owner of Alibaba/Aliexpress is Jack Ma. I wonder if they are one and the same person?. Although I cannot imagine the owner of Alibaba and reputably the 33 richest man in the world, living in Hawthorne California. (nice place i am sure it is).
Happy Holidays in your new home, Will. Keep the great videos happening in the new year. Thanks
HI WILL, I get so much fun from watching our vids. I do have a small battery to run some ham radios, but nothing big, Thinking on that, you should get your Ham Radio licenses , it is not hard and then you could help us out with first hand info on emergency systems for the typical radio rig at about 100 watts out. Thanks Dave, W4GSM
These cells still will work just fine with active balancer in place. Of course only 80% of the original capacity but hey they are used aren't they? I know for sure because i built for years cell pack from recycle batteries with way less capacity than these LFP type and they are usable for 2 years on each pack that i built (recycle = throw away). Sure they are not LFP but they all are lithium aren't they?
I am migrating toward LFP now for their advantage. They cost more initially for sure but i know for sure i do not have to rebuild my pack for years to come.
I never do the video of my system because i know very few will do due to the time, complexity and effort to build such pack of 1s100p and have to do that 14 times for the 14s100p. But boy oh boy i sure learn and know a whole bunch when i have to do that vs buying new on everything.
Well i am migrating toward the LFP type of battery. My main motive is I like the 15 years lifespan and still 80% of capacity after that. Hell i still got 2 years of use with recycle laptop battery which guesstimate 40-60% left capacity so LFP is a no brainer choice. Really with the initial cost they are a bargain in compare with the other type of lithium cell.
Don't fall for the simplicity and easiness of ready to go solar server rack. I get more bang for. my bucks if i buy new LFP at any grade and a case kit with bms and all accessories and assemble myself. Can you beat under $2000 for 16 LFP's battery with 300AH in a case with bms and active balancer? that is what i found out during my research. That popular EG4 brand is selling about $1300 for just 100AH with no active balancing 48V system that is. Thanks but NO thanks i build my own and I can fix easily if something goes wrong later.
Don't always believe what you see on Utube. Do your own homework to determine fact from not fact!!!!!
If you have solar panels charging, then would one cycle be one day? Would the battery last 2000 days? I don't know. Can someone explain please.
I think Internal resistance can tell you alot about used cells. My BMS can calculate it for each cell. Other way is to measure it with a special instrument. Costs app. 40$ and you can "measure cell health". And no more gussing.
I have a meter for testing ir. Just lazy. But yeah, would show a difference for sure
Hi Will. Thanks for another great video. I am learning so much from your channel. Guess what I got for Christmas... yep I got your book "
Mobile Solar Power Made Easy!"
Aliexpress does have a good return policy and will have the seller and buyer negotiate the return process while they monitoring the conversation. I have had an issue before and ended up being able to keep the item with getting money back.
For a household or auto solar system, a slight difference in capacity is negligible. But for a high drain ev conversion system, that cell matching is vital. Open up some more stuff!
Thanks Will for these video's, in the end youre video's will clean the market and we learn so much
This is just-in-time information to me! I've been searching through AliExpress for a while. I know I can buy 2.5kWh (2.2 usable) 48V from pylontech and i am wondering how difficult it is to beat their price with DIY-parts. Grade B, yes, this is also an option but not fair when comparing with pylontech from the near-y dealer. Will, thanks for information, You make a very good job!
Hi @DIY Solar Power with Will Prowse! How did Aliexpress responded to the refund request?
Catching up on past videos, I wouldnt be surprised if Will had an old house on a lot filled with all these test cells and solar on roof selling power to the grid. The WPower company.
jack ma is probably a synonym for jack ma (Founder of aliexpress). Sino is another word for China.
A few question. Have you tested CATL cells, 50A, 110Ah or 320Ah on aliexpress?
Also do you use Yellow Fiberglass Sheet beetween the cells? or how do you isolate them?
Remember everyone, give Will a thumbs up on his videos, so that he gets paid by UA-cam.
Also don't skip ads! If you watch more of the ad, he gets even more. Instead read and reply to comments while it plays! 5 secs left! C-ya
As per other commenting here, could you do a video on what to look for when buying online, whether aliexpress or others.
Maybe show us some screens or make a list of what to look for specifically (grade, capacities, case size, type.etc.
Why?
Well, links come and go, the merchandise may not always be what is specified if the link is aged, etc
Love this kind of thing. Please keep it up. Let us know the good deals,!!!
I’d guess that most sellers of commodity goods on Alibaba are like many on Amazon and EBay - they do drop shipments. You order something from them, but they don’t have inventory - they turn around and place the order with the supplier who then sends it to you. BTW, Sino means “of or relating to relating to China”.
Great video makes me feel like I can build my first one now THANKS Will.
VERY informative and useful video....no wasted time or words! THANK YOU!
The question I have is about operating temperature... What is optium? Would 50 degrees 24/7 be good, if so using geothermal for heating cooling would be an easy thing to do.....Bill Rogers
What BMS would i need for 24v 120Ah lifepo4 (8 cells)? I have 3000W hybrid inverter charger.
I really, really appreciate your vids on the ali express / cheap chinese batteries
Thanks for your videos. I actually bought a GTK pack for my golf cart from Ali Express and have been battling with the manufacturer ever since. Battling even to the point that the company Foxelion created a fake SMS/text message to use as evidence in the dispute so Ali Express would deny my dispute. Now the BMS keeps tripping when I give the cart some throttle, making it unusable. Your videos inspired me to open it up and seek to change the BMS, but I did not find quite what I was expecting when I opened the case. Instead of 16 cells like what is in your video, there appear to be 48 individual cells each measuring approx 3/8" x 5.5" x 7". The BMS is JBD-HP28SA and the pack is supposed to be 100AH 48V Lifepo4. At this point, and being a newbie to lifepo4 I am hesitant to dig in any farther. I am hoping to get your opinion on this pack design and any advice that you can provide. I would be comfortable swapping out the BMS as there are just 2 soldered connections and 2 plugs, but is there any good way for me to test to see if that is the problem before I do so? Would it be worthwhile to buy an upgraded BMS to replace this one? and if so, will the balancing wire plugin be the same?
it's tricky to pick reliable sellers on aliexpress.
sort them by credit or sell performance before you click BUY button.
Yes and the other thing is... the specs / quanities / what you will actually get, are hard to figure out, due to the translation...
Thanks Will, I recently moved from 18650 power wall to lifepo4. Searched videos on you tube and attracted by your videos and subscribed. I need a help. This video is 4 years old and your knowledge might have build up a lot now.
Please help me to read the capacity of lifepo4 batteries. Which meter I need to buy? All the meters I have tell me the voltage.
Also if you have find a good seller for blue colour lifepo4 now please direct me to buy. Thanks.
So if all these Blue wrapped prismatic cells are used... It makes me wonder where all these batteries were in installed originally and how they are able to get so many second hand batteries of the same size and design?
They do sell them used, but not all of the time. When I made this video I was not aware but the new ones on AliExpress will be labeled as "new"
How bout a members only video section tht gets to see the review a week before Joe UA-camr sees it ? Then we could buy the cells before they jump up in price.
More cells more cells!!!Great Video Will!!!
Is there a way to buy prismatic cells that are made in America? What about directly buying the cells that Tesla uses?
Prismatic cells have the advantage of being far simpler to assemble. I'd like to find a good local manufacturer/supplier
just love these tear down videos.. keep em coming !
Thx. Keep us posted on the dispute with aliexpress. I am interested in this experience as I have never had to use it thus far.
I've already commented on these cells that have been reviewed. Now I want to change the subject just for a minute and ask you a question 🤔 besides being much harder to steal due to their size 😮 What about saltwater batteries ❓ can the homeowner build them for themselves 🤓
I have 6 - 100 wt panels and want to have enough power to run a fridge. Aside from that I want to be able to use a toaster oven and charge laptops/phones and maybe a induction cook top, of course not all at the same time but it's for an RV. I also want to run a small AC unit at night on hot evenings. So what I'm asking you is, how big of a battery bank do you think I might need to power my RV. Using my 6 panels.
I'm terrified to make a big order from Aliexpress. I need 96V that can deliver sustained 200A, burst up to 400A....and I'm just not confident there won't be some kind of sneaky trickery going on with an order that size.
same
Thanks for all the good info.
Merry Christmas!
Jack mayi is probably Jack Ma the guy who founded alibaba :P
Yep- Alibaba is meant for business-to-business transactions and large quantity sales while AliExpress is their sub-company more aimed toward individual retail sales.
How do you charge them can you show?
How long do they last what type of light bulb. Say I want to have some ELD lights on through the night. Hope I'm clear. Thank you
Merry Christmas, Will!
Don't batteries depleted to 80% deplete much faster from 80->64% (the next 20% drop in capacity) than they did originally from 100->80? The charts I see show capacity falling like a rock after a cell is already down to 80%. So these would be good for a 100 cycles or less.
So, what is the optimal storage device for very frequent charge/discharge cycles? Is there a point at which you would want to string multiple storage systems together so that each can perform optimally?
What is the calculus for the degradation done by a very deep charge and discharge cycle under controlled temperature conditions versus an equivalent amount of energy versus several shallower cycles in lithium iron phosphate cell?
When the capacity of the cell is down to 80 percent , is the efficiency affected, or will they charge with 80 percent of the original charge capacity?
Hi WIll - i dont think that 120ah are degraded 150ah cells - the dimensions dont match up. The 150ah cells are 6mm taller
Good presentation. Have a safe and Merry Christmas.
Great Video, some blogger use balancer modules, some not. Could you explain when would you use balancers?
I know it's a little off topic, but I wonder how these would fare on an intermittent 400A load for engine starting and topping up at 150A off an alternator. There are some bigger BMSs out there that should take the loads pretty easily.