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No... They often get sneaky and get someone to do it for them or join under an alias and promote the stuff pretending to be a customer or potential customer... I remember uno batteries doing this and getting flatout caught doing in on a golf cart forum.. I got banned from the facebook page for...

I financed my system in 2019 with no money down. With the incentives offered then my monthly loan payment was about the same as my electric bill averaged. Now electric has gone up considerably I was able to put air conditioning in and air condition my house all summer and still no electric bill...

Back in november (6th) I ordered 16 "90ah" cells from Global power co on aliexpress. I knew I was taking a risk but the feedback from others was mostly positive and they are a "top brand" seller. anyway the cells arrived today 2 days before the deliver by deadline. the barcode shows them as...

https://www.aliexpress.us/item/2251832870353882.html?spm=a2g0o.order_list.order_list_main.39.18ba1802EJe55m&gatewayAdapt=glo2usa&_randl_shipto=US

Define "Our" Because the recent changes made by this administration have negatively effected both my Career, My Business and just about every other aspect of my life including my hobbies like this one. For what exactly? We have no viable plan, all we have are the results from an impulsive...

ahh yes.... and some coders who later wrote firmware for "FTA" dish network emulator boxes put in "time bomb" clocks in the code eventually bricking the receiver if another update wasnt done in a specific time period to ensure dependency on them. Lots of ways to skin a cat.

The HP wide format printers I used to service had them and they were even putting rf chips in the paper cores of the rolls of media so if a customer called for service and said they were using hp media and inks they could use the rf chips to verify it. using the reader installed in the printer...

I realize this is an old thread but for those reading this, you absolutely do not need to keep these batteries warm during the winter as you should NOT be mowing or more importantly charging them . Its also a bad idea to store them fully charged during this time so keeping them on the charger...

I have well over 3000 ebay transactions now and I have only been burned once. I have bought from dead beat scammer sellers a couple times now but ebay has always refunded me. I dont know if you noticed but amazons sorting algorithm was designed to make it very difficult to sort products by price...

Accidental post

I just bought 4 of these myself.. they are selling on ebay for $300 each and have the same weight and rough demensions as many "mini" 280ah batteries. https://www.amazon.com/CEAC-Protection-LiFePO4-Battery-Off-Grid/dp/B0DP1Y5GM3?ref_=v_sp_product_dpx

I for one commend them for trying to mark their cells so people could tell what they were.... Damned if you do damned if you dont. I guess everyone wants to be able to choose to plausible deniability that their grade B stuff is grade A

That will work. and 50ah is plenty for the 480rm mower since it never draws 50amps (typically its below 30amps when mowing ) and a 50ah lifepo4 battery will give about the same runtime as a 100-125ah lead acid. I connect my charger directly to my pack and dont bother with the onboard port. I...

I bought my 3.6kw (actually 4800w with a 3.6+1.2kw output) unbranded with the wifi adapter for under $300. It came painted white and had the same manual as the rebranded versions only without their logos. being mine is for an offgrid hunting cabin I dont think I need anything bigger. In testing...

My spypoint trail cams will grab a signal from any local provider in the area to send the 100 free photos to app every month.. it also give me info like percise gps location and temp, battery life and other stats. No registering with any network provider necessary.

I added an active balancer for this and at first I had it on a switch so I could manually turn it on and off when charging.. then I added a voltage activated relay which turns it off once the pack gets below 3.37v per cell.

So what your saying is its the armed totalitarians that will form the looting mobs? I think your oversimplified stereotyping would't last you too long if the Sh#t did hit the fan... Theres a lot of folks that park themselves right in the middle in the middle between the extremists in the common...

Likely an copy and paste image taken from the 100ah version ive yet to find. or yet to be released.. Ive found this 280ah version for sale in saudi Arabia and ebay in the US ebay seller has hundreds of sales and good feedback.

So ive hooked up pwm fan speed controllers to dial the fans down a touch which dramatically reduced the noise. I also have Noctua fans on order. Something ive noticed is the left fan is a lot more powerful and higher rpm than the right fan. (I think its like 1.5amps and like 4000rpm max or...

When you buy a factory second pair of levis at a discount store do they include documentation as to why they are $12 instead of $60? All that documenting and keeping track of each failed cell costs money. They likely just get yanked off whatever test bed they fail for whatever reason and get...

it appears to be a typo thou... They are listed as 57.4lbs elsewhere in the specs and photos and with other sellers such as ebay and with that weight and rough dimensions I found many other comparable packs that size with same 280ah from many others such as SOK and goebel power. By mini I mean...

Like solid state relays they typically fail closed... typically contacts of any type dont stick and weld themselves to nothing so it only makes sense they would typically stick on. If the failure was catastrophic ive seen the circuit open back up but ive seen most mosfets stick closed.

just want to clear up this misconception. I keep seeing people in this thread talking about being afraid to go with 50ah or 60ah cells because they wont be enough. This in reality completely depends on if 1c or 2c cells are being used. the actual amp draw while mowing depends on what model...

Ive read they auction them.. as for a % matching I doubt your going to find any true consistency to why and how they compare to grade A they can fail for multiple resons some of which may not even effect performance, especially in solar low c applications.

Hes building a golf cart pack. Most commercial golf cart packs are 175a or more continuous discharge and are 105ah or less.. a 105ah pack is normally good for 30-40miles. the performance carts sometimes need more with the 500-600amp controllers and high torque motors. many use the 300/600amp...

Well it seems this thread has gone more in the direction of a uart based solution but for reference I was able to get this to work.. I removed the relay and soldered it remotley with wires to open and close the contacts at the desired voltage

well its states I have a 30 day return window and I purchased with 12 month financing with my amazon card for that reason... I'm also a vine member for Amazon and I know how they value reviews and press. Theres only 2 left at that price at this point.

almost fully charged..

Curious/ whats the weight difference between a legit 304 cell and a 280? do you know?

Nothing has shipped yet but a label has been created for 1 61lb /27kg package... hopefully there are 3 more as well.

I have built a couple packs now for golf carts and decided to buy a broken rm480e which needed a controller after getting it working I found the 4 year old batteries barely have enough charge to get through my 1/2acre lawn... So I ordered 3- fiat 5 cell lithium ion packs for $99 each from the...

Pretty sure that 24lbs was actually supposed to be 24 KG

Its working good for me.

Keep in mind the ambient air temp isnt necessarily what the internals of the battery would be... For example if temps were below 32 degrees consistently for a few days the battery migh stay below freezing temp wise for a bit longer even after the temp comes up.. The same works in reverse. I...

Well if your in upstate NY your in my neck of the woods (north Tonawanda/ Buffalo ) so its strange that fedex isnt showing you the weight. we should get them about the same time.

I just want to point out that I agree while paying with another means is ideal, I have a brewery and a few years ago I found the manufacturer that makes the equipment thats rebranded and sold in the US at a 300% markup... anyway I did in fact pay them with a bank transfer (partial payment...

I went from 6 -6volt golf cart batteries wired for 12v to a single 230ah diy battery from docan and for the first time I can even reliably run my coffee maker without draining my battery bank. even th 280ah battery will be much more usable capacity than you had with the golf cart batteries. If...

Then it hasn't shipped yet mine said same until this morning. My friend works at FedEx and he checked for me and even thought it said "left shippers facility" FedEx dd not have it yet.

Just my thoughts here but not letting the battery charge till 50 degrees is likely because the manufacturer is not confident that the center of the cells is above freezing until the area where the temp probes are located is at and maintains 50 degrees.. when you heat a piece of meat in an oven...

I did this once... then found out they dont ship anything they send you a fake tracking number I was kinda my own fault because the pricing was completely unrealistic even for aliexpress pricing. I made an impulse buy and realized this afterwards. I got my money back and then did my homework...

The illusion of freedom...

There is one drawback of the parallel wiring.. And that is the reduction of capable current from the pack available to the load which can still cause a chain reaction of the bms all shutting down. If the load is never high enough to trip the remaining bms overcurrent protection then this doesnt...

I understand they are not mechanical relays but they are both forms of electric relays/switches. (there are no contacts or moving parts in a solid state relay either) As a field engineer I can think of a particular board in a particular machine ive been servicing for years that has a tendency...

I bought mine unbranded from aliexpress for about $275 and its labeled as a "victor"-NM-ECO-LV-3.6K I have been playing around with it for a couple weeks and as I dont have my new cabin moved to my property yet Ive been unable to really use but ive been trying to get it to talk to my jk version...

I got into a bit of heated discussion about this myself as I would agree with you but I was shown data and articles at the time that stated both are technically a form of lithium ion battery. maybe those articles were wrong? I dont know

well I was comparing the 150a version the US seller had to this one...

Big Battery recently broke up with their manufacturer (Battery EVO) The specs big battery were using seem to be inflated from the actual manufacturers specs on the same batteries they also sell under thier own brand... They even recommend and sell the wrong voltage charger (58.8v) to go with...

so I have a 48v lithium powerd cart with a 360w 42v panel as a roof... im currently using one of those cheap green MPT-7210a units and it works but when theres even the slightest shadow or a bird flies overhead it resets back to zero and takes a bit to get back to charging.. just looking for...

I think they would have done a lot better if they would have marked the non automotive grade cells with an "S" or something to indicate "Solar/Storage" grade cells. instead of "B" which weve been conditioned to see as flawed or inferior for our needs. (of course if you are in the camp that...

Once all the reactors, and just as important all the cooling facilities for the spent rods fail it truly wont matter. Theres actually a documentary about this.. why am I the only one who apparently saw and read about this? I hope I didnt just spoil somebody's life goal here? Its cool though...

Depends on where you live The steel enclosure I bought for $99 + 90 shipping in January is now like $650 I just took look on ebay here in the states and now instead of cheap Chinese enclosures im seeing rebranded expensive chinese enclosures shipping from the UK for 950...

This should have never happend even with bad cells, unfortunately something else was to blame here (bad wiring or bms) If it were me I would not warranty this (Sorry, just being honest) defective cells dont just all fail at once on the same cycle and they would never go below the minimum voltage...

exactly why I bought 4

I misunderstood. Thought he had 8 cells. I also looked hard at this bms...

And aliexpress is alibabas retail site... They are owned and managed by the same company. Theres nothing wrong with any of them if used correctly. Unfortunately when it comes to buying batteries they can all be good or bad depending on how much research you do or dont do about the vendor selling...

fair enough points... gives me more to consider.

Most likely yes, I agree. but some state otherwise to quote this company https://earthxbatteries.com/lithium-battery-series-parallel-operation-2/ "Maximum Safe Operating Limits When two batteries are put in parallel the continuous discharge amp rating and charge amp rating is typically...

So I'm just sharing a quoted post from a golf cart forum I belong to because i feel its relevant here. I was previously unaware of these differences between AGM and FLA. "AGM batteries in series have a similar problem to lithium when charging them, regardless of the charging profile. AGM do...

I agree, thats basically my understanding of it as well. From what ive been reading it seems though that the idea that so many already own non automotive grade cells they bought under the premise that they were A grade has struck such a nerve some folks are claiming blasfimy and you would think...

I would agree if that weight was correct and not the 57.4lbs stated everywhere else.

Came across this on the jag35 website... NEW YORK residents: On 3/2/2023 New York passed a law banning the sale of lithium-ion batteries for mobility devices that are not certified to UL 2271, and the assembly and reconditioning with cells removed from used batteries for commercial sale within...

The fallout from the big ones would make life extremely difficult for the whole globe according to what ive read.

Like ampster I have an agreement to get whatever I dump onto the grid back later at no cost but the $18 connection fee... Heres the catch. I HAVE to be on the grid and am forced to pay that $18 a month as being off grid is not allowed in the City I live in. So this is seen as advantage for some...

My 4 agm batteries still tested and worked fine even though they were 4 years old. I sold them for $50 to a guy who wanted them for a scooter. I could tell by the time I was finishing up my lawn though that they were nearing the point of needing a charge. The issue with the ryobie is it would...

It does help smear the legitimacy of the decent sellers on ali though... and that certainly helps justify future or past decisions in ones mind to pay more and buy elsewhere regardless of needs or cost. Its the same type of oversimplification strategy I see being used more and more justifying...

Just mowed my lawn which is just under 1/2 acre with 244ft of fence line... i used less than 20% of the 64ah batter pack somehow. Maybe its because its all flat land IDK but there was a huge difference in the strength of the mower blade as before when I mowed in certain low spots where the grass...

I believe this is one of the reasons stated for taking control of countries like Greenland and Ukraine for their rare earth minerals. (I do not agree this is the way) I know we've had US Troops in areas of Africa to protect our interests there and control the local politics like we've done in...

I bought one as well.. the diy solution I made works well but I like that the display on this unit shuts off to consume less power. and its a more self contained solution than my current setup. once this video went out the price of these skyrocketed on ebay so I bought mine on aliexpress but I...

The more and more I read and watch on this the more I believe theres no real consistency to any of this and so many variables ..

They were these packs wired in series but I got them at b hookup.... I cut the last cel off from the series but left it in the pack for compression reasons.... ends up being a 48v pack for under $500 shipped...

Any animal is subject to this disease if they eat a certian organ protien from the same specis animal like thats found in the brain... Sounds sci fi but its not. it originally started with cows somehow being fed ground up cow which included some brain matter.. there was a tribe of people that...

I see what I think are 2 bluetooth modules which means there may be 2 bms modules. I also see 2 bms heatsinks. . I see cell c4 is connected incorrectly but I assume because your started disecting the pack.. I will stand by my statement that if any component failed here to bring all those cells...

The bulk of extra wires on the #7 cell in an 8 cell pack is correct with this bms..

Bethlehem steel did use basic oxygen furnaces later..

That is true when we are talking about lithium batteries with thier own bms wired in series baecause when one battery reches full charge the bms shuts off continuity to prevent over charging and then all the charging to the other batteries is stopped. lead acid chargers work differently as well...

Yeah golf cart controllers are more than just a pwm device.. and i never said anything about any cults. Its really the OPs decision to decide if paying double for a premade option is worth his time. my guess though is the reason hes here is he already decided he wants to research building his or...

I went with aliexpress 90ah lifepo cells fo my last 16s build... works great but im building a 72v pack now made of bmw/fiat packs (64ah samsumg nmc cells) I put the 16s lifepo pack in my ryobi riding mower..

Thanks, I have been looking and purchased a handful of different types of cells and used ev packs for projects like golf carts and a decent amount of the EV packs are built with multiple cells in parallel. I dont see myself even using 200amps but the ability to more easily move and carry 2...

So more recently he seems to believe the compression matters now... I agree he is learning and I totally respect that as we all learn as we go and make mistakes. But hes quick to form and share opinons based on incorrect assumptions like the series he did bashing the JBD 300amp relay bms that...

I never said I believe them myself but the truth is usually less sensational and somewhere in the middle.

you will likely beat me to implementing mine..

According to pics on the 18650 store theres both round like pictured here and the hexagon cells out there..

I use that one and have had good luck with it. (I did buy mine from aliexpress for $44 though and I bought the 12-16s version) Keep in mind these are only intended to be plugged in temprarily to either top balance or bottom balance when something like this occurs. You can leave the wires all...

THIS has been the experience Ive found with a lot of things including some of the equipment I worked on over the years..

whats the weight? you have to copy tracking and past in google or go to fedex tracking site for the weight.

I believe what hes saying is they are not the top grade cells which would be automotive grade they are often built for... anything else would be B grade or lower regardless of semantics and terminology used. There is no enforced standardized grading system in most things that are graded by...

This is not encouraging.

Heres a link to the 500a /240amp continous bms and meter I purchased. I dont have it yet as the the tracking shows it just hit the states. https://www.aliexpress.us/item/2251832828161546.html?spm=a2g0o.order_list.0.0.64021802S4ERqz&gatewayAdapt=glo2usa&_randl_shipto=US I did consider a relay...

They are actually rated as 275 wh cells (86ah) Im only 10 minutes away from the Ontario boarder too... likely its a tarriff thing or some shipping restriction in Canada. I should emphasise I havent done a capacity test on these yet. I have them trickle top balancing now till my bms arrives...

Thanks everyone. Im not worried about different packs but more the reasons why it would make more sense to make 2 packs instead of 1 larger capacity pack since all the cells are supposedly grade a and matched in performance. As far as I can tell many of the prebuilt batteries sold as well as ev...

no tracking her either. not supposed to arrive till may 27-28

these are for a golf cart... im looking at 16 pcs of 105ah cells for 746 shipped from a "Top brand" rated seller... Docan doesnt appear to have USA stock of 105ah cells but if I bought thier smaller 100ah cells id be looking at $1144 ... thats more like a $400 difference unless im missing...

batteryhookup has the new style cells here cheap.. https://batteryhookup.com/products/4-new-eve-3-2v-280ah-lk280k-lifepo4-prismatic

Can you share what those advantages might be? The only ones I can think of are redundancy if a bms fails (but also doubling the chances of having a failed bms) and being able to monitor the attributes of each cell Right now I have the large single steel enclosure and the $130 jk bms with the...

So you ordered yours before Brucey? I think there was only 8or 9 left after I placed my order friday night. im hoping for more tracking info to reflect 4 shipments honestly because if they ship 1 battery it wont help me with my 24v system. 61lbs for one is encouraging... not so much if its for...

How the hell are are you going to buy a chinese made product without dealing with china in some way?

My guess is because a bms designed for 6 to 21 cells is more flexible... Most of the bms I have seen can be used for a range of cells successfully.. The 300amp JBD im running in my golf cart is good for 7-20s and I run 16 this way with no issues. If I choose to up the voltage of my pack in my...

I bought a 500a bms on ali but buts only rated for 240amps continuous... honestly I was also looking for something with a higher output as its going in a golf cart im building but in the end I discovered the 240a is plenty for my application.

What gets me is some go through all this effort and $$ buying the premium cells an then not even taking the time to compress them properly in the installation cutting the lifespan short anyway...

Ive read that bmw and volkswagon use prismatics but mainly assumed they were used in some of the many electric vehicles sold outside of the north american market... Shame on me I guess for not being the condoscending all knowing one here..