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BATTERY SELLERS - THE GOOD, BAD, UGLY -- or Jenny (DOCAN) so far so good ...

Here is the CAD drawing showing where the QR code is, and the terminal shape.
www.gobelpower.com

REPT 3.2V 280Ah LiFePO4 Battery Cell

REPT 3.2V 280Ah LiFePO4 Battery Cell REPT 280Ah LiFePO4 Battery Cell CAD Drawing with Dimensions and Main Parameters The Rept 280Ah battery is a high-capacity battery designed for various applications that require long-lasting power. With its advanced technology and large 280 ampere-hour (Ah)...
www.gobelpower.com www.gobelpower.com

1666752455946.png
 
The cells you have are NOT REPT, they have square terminals.

I don't think anyone cares about grade B or what not, the issue is Docan is doing this trickery and putting a fake QR code on the side.

https://www.reddit.com/r/LiFePO4battery/comments/pujggt

real QR code is always supposed to be next to the Battery Vent.

Looks like EVE putting B on the QR code has messed up Docan Supply, I don't get why they are doing this, Current Connected and EEL both sell grade B EVE cells and show the B on it, they at-least are honest about it. People would get over it, but I suppose some can not accept this bruise to the ego and have to do other things to deceive.
 
Chris@18650Batterystore said:
If those are REPT 280's, the large QR code is marked up and they can't weld over it so they replace the entire black insulator on top covering up the original large QR code and only show the small QR code on the side. Those are Grade B and not only that but they took the effort to deceive it :ROFLMAO: Sounds like a great company!
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I don’t think they are being deceptive. They never said they were grade A.. everything I read said grade B cells are perfectly fine for solar storage and that almost everyone buying cells are buying grade B unless they get them from Amy Luyuan (who possibly sells grade A) or directly from the manufacturers.. I got a quote from Luyuan for cells that are supposed to be grade A, they were $1000 more than what I paid for 19 of these cells..
 
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I thought cheap 4-life ordered CATL. on his post #294 so I do not know why REPT is brought up.
"Ordered 19 CATL 280ah cells from Amy (Docan). Cost me $2450 total. I’ll let yas know when they arrive"
 
Alkaline said:
The cells you have are NOT REPT, they have square terminals.

I don't think anyone cares about grade B or what not, the issue is Docan is doing this trickery and putting a fake QR code on the side.

https://www.reddit.com/r/LiFePO4battery/comments/pujggt

real QR code is always supposed to be next to the Battery Vent.

Looks like EVE putting B on the QR code has messed up Docan Supply, I don't get why they are doing this, Current Connected and EEL both sell grade B EVE cells and show the B on it, they at-least are honest about it. People would get over it, but I suppose some can not accept this bruise to the ego and have to do other things to deceive.
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Whether or not there is a B on the original QR code from the manufacturer or the manufacturer removes the original QR code and then the seller has to cover up the scratched QR code so the cells look good or whatever reason is irrelevant to me. I’d rather them cover up the scratched off QR code for looks. It would be different and a problem if the seller said they were grade A EV quality cells and then covered up the original scratched off QR code in an attempt to pass them off as EV grade A..
 
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Chris@18650Batterystore said:
There are no EV version or "top grade only" or A++ version, these are all just made up terms to confuse you. It's A or B.
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I agree with the sentiment of your comment, but not the details of your 'grade A or B' terminology.

Here is a short paper that lists many of the certification tests for EV grade battery cells. It was written in 2020 to compare the Chinese GB/T standards with standards from other countries. The test standards are always subject to change, so it might be slightly out of date.

If you read the paper, there is not any mention of Grade A or Grade B. Those are not official standards that someone can test. Those terms are marketing schmoo.

So if a merchant is telling you that their batteries are 'Grade A', what they are telling you is that they failed to pass the certification test that they were trying to meet. Otherwise, they would tell you what official certification the cells have.

Theoretically, the cells need to pass UN38.3 before they can be transported internationally by air or sea, but who knows what is really being done.
 
This is Amy Docans response to covering up/removing the original QR code


Yes, CATL brand they don't supply their batteries for retailers, they only directly supply to the big company. So we have to hidend and remove the big QR code in the center.We use another company to purchase this batteries from the factory, the corner small code also original QR code from CATL factory.

This battery you can test the capacity, if they are not high quality , they can not test out over 280Ah. My customer tested the capacity is 299Ah.Only Grade A battery can get higher capacity than battery specification.

Thank you very much
Amy Zheng
 
Chris@18650Batterystore said:
There is no EV Grade A and normal Grade A. Either the cells are suitable for manufacturers to build packs with or they are not. A or B.
Click to expand...

I’d say there should be only one grade A and that’s EV grade A. Any cell that doesn’t meet strict EV grade requirements should then be considered B. Just because cells are grade B doesn’t mean a battery pack cannot be made from them for solar storage.[/QUOTE]
 
Chris@18650Batterystore said:
If the Docan sales was honest and transparent with you, then you got the Grade B you paid for. If she played innocent and danced around the issue throwing these other terms at you then you've been swindled. Surely she didn't mess up vocabulary on where to send your USD.
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I never asked if the cells were grade A or B because from what I read it’s useless to ask that.. however I did ask if the cells were new and she said yes and it appears as if they are. It also appears that they have full capacity. Will know more tomorrow. However her latest response to me said that only Grade A cells can pull full capacity.
 
Cheap 4-life said:
I’d say there should be only one grade A and that’s EV grade A. Any cell that doesn’t meet strict EV grade requirements should then be considered B. Just because cells are grade B doesn’t mean a battery pack cannot be made from them for solar storage.
Click to expand...
[/QUOTE]

No one is arguing this, what is at issue is the lengths these sellers go to deceive buyers. It would be far better for them to leave the original QR code that is marred up and simply put a sticker over it then to go out of there way to put a fake QR code on the side.

Another company onier is now re-lasering cells even though there cells tested properly, Again would have been better to say these are grade B testing to capacity then to go to these lenghts to trick people.
 
Alkaline said:
how you guys keep giving Docan a pass I never understand. CATL making a separate QR code on the side after marring up the original? Really?:poop:
Click to expand...

She doesn’t say CATL mars up the original QR code. She said Docan does that. She also doesn’t say CATL makes a separate QR code. She says the other QR code is also the original. I take that as it’s the same numbers. She doesn’t say if CATL or Docan adds the new QR code
 
Your quote
“No one is arguing this, what is at issue is the lengths these sellers go to deceive buyers. It would be far better for them to leave the original QR code that is marred up and simply put a sticker over it then to go out of there way to put a fake QR code on the side.

Another company onier is now re-lasering cells even though there cells tested properly, Again would have been better to say these are grade B testing to capacity then to go to these lenghts to trick people.
[/QUOTE]”

I here ya and kinda agree.. however is it all done to really trick people? I agree it all doesn’t need to be done.. from the way she/Amy describes it, Docan themselves remove the original QR code. Seems to me that they can’t keep the original QR code on the cells for some reason after buying them from CATL? The reason is most likely an agreement with CATL to remove the original QR code because the cells didn’t pass the tests for EV packs..
 
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Chris@18650Batterystore said:
However her latest response to me said that only Grade A cells can pull full capacity.
Cell capacity is one small piece of the puzzle for a component that is designed to work in sync with 4, 8, 16+ counterparts for 10+ years.. The vast majority of Grade B cells can indeed pull full capacity.
Click to expand...
Yes I agree. so to me that means that Docan considers any cell grade A that can pull full capacity.. so that is most likely why they remove or cover up the original QR code,, to make the cells still seem like grade A even though though they are most likely grade B. Grade B because they didn’t meet CATLs strict EV requirements..
I think what Docan is saying is that if the batteries supply full capacity then why can’t they be considered grade A.. Even if they were not good enough to pass CATL test for EVs.. I think Docan is also saying that to be considered grade B the cells would not supply full capacity.. so Docans criteria for grade A for solar storage cells is simply if the cells pull full capacity.. TBH for solar storage, supplying full capacity is basically all that matters. As long as there isn’t any runners that can’t be balanced out, then for solar storage Docans grade A (actually grade B from CATL) are fine with me and I suspect fine for most solar storage applications.

So they cover up the scratched off QR codes because for solar storage application the cells pull full capacity and therefore are still considered grade A to Doncan.. I paid only $105 per cell so obviously these are not EV grade cells, they are solar storage grade..
 
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Cheap 4-life said:
I paid only $105 per cell so obviously these are not EV grade cells, they are solar storage grade..
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If that's total cost with fees and shipped to your door, that's fantastic! In fact, I'll build another battery or two at that price! If not, then I guess you paid more than $105. :unsure:
 
Yeah cheapest I see is 105 + shipping + sales tax + ali transaction fee = closer to $135/cell, which is why buying direct from Houston warehouse would make more sense as its only $60.00 more for a 4 pack.

That being said I am not doing DIY as I believe its cheaper to buy retail batts (for my needs).
 
Wet1 said:
If that's total cost with fees and shipped to your door, that's fantastic! In fact, I'll build another battery or two at that price! If not, then I guess you paid more than $105. :unsure:
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Total was $2450 for 19 cells. $128 each cell. $105 before fees etc. buying from local warehouse wasn't an option. They didn’t have any in the states. Wasn’t going to be any for a while from what Amy said. Also it was I think $650 for 4 cells ($162 each) and I needed 19 so not in multiples of 4.. All in for 17kwh, bms, spring compression, laminated flexible busbars it was $2750ish.. it costs over $3k for only 10kwh of the cheapest server rack.. although I understand many reasons for not DIYing
 
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Glad I found this thread about the catl280 side QR code. I have 8 of those exact cells on order from Docan but there was a delay in shipping. I was offered the EVE 280k instead for the same price, but turned them down because of all the negatives I've read about the eve280k having low capacity and arriving bloated. I am more concerned with them being used or refurbished somehow, with the new black covers and QR code, if that makes sense. Does anyone have an opinion on which is the bigger risk, these CATL 280 with non factory QR code or the EVE280k that seem to be mostly swollen and fall short on capacity? I was still leaning toward the CATL, as I've read almost all positive accounts, but now I am wondering if I made the right choice.
 
If you want certainty, you'll have to pay the price and get EV grade. Otherwise its a toss up either way.
 
Chris30559 said:
Glad I found this thread about the catl280 side QR code. I have 8 of those exact cells on order from Docan but there was a delay in shipping. I was offered the EVE 280k instead for the same price, but turned them down because of all the negatives I've read about the eve280k having low capacity and arriving bloated. I am more concerned with them being used or refurbished somehow, with the new black covers and QR code, if that makes sense. Does anyone have an opinion on which is the bigger risk, these CATL 280 with non factory QR code or the EVE280k that seem to be mostly swollen and fall short on capacity? I was still leaning toward the CATL, as I've read almost all positive accounts, but now I am wondering if I made the right choice.
Click to expand...
My opinion, Used or refurbished I highly doubt.. just new cells that were not good enough for CATL or EVE to use for EVs. Still good enough for solar storage.
 
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Chris30559 said:
Glad I found this thread about the catl280 side QR code. I have 8 of those exact cells on order from Docan but there was a delay in shipping. I was offered the EVE 280k instead for the same price, but turned them down because of all the negatives I've read about the eve280k having low capacity and arriving bloated. I am more concerned with them being used or refurbished somehow, with the new black covers and QR code, if that makes sense. Does anyone have an opinion on which is the bigger risk, these CATL 280 with non factory QR code or the EVE280k that seem to be mostly swollen and fall short on capacity? I was still leaning toward the CATL, as I've read almost all positive accounts, but now I am wondering if I made the right choice.
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I am one of those who receive "bloated LF280K" and i can tell you that they don't have low capacity and soo far they work perfect.
 
Alkaline said:
post your test results both WH and AH Its always good to get as much data as we can.
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Growatt 5000es Sharing what I learn from this forum

List of items i use for my instalation -Inverter Growatt 5000es from Signature Solar -Autotransformer Growatt (prepurchase 1 month ago from signature, still waiting for it). -16 Cells LF280k from Doncan -Riden RD6024w with 1000 watts psu (have a special port for charge lithium battery, it have...
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