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Eve 105 with questionable (reprinted?) QR code

Exactly there. Code checks out, that's not a problem. The problem is that the code is stickered and not etched, so I suspect a bunch of legitimate codes has been stickered to salvaged/out of spec/lower grade cells.
If they are legit peeling the sticker should have the qr code in laser right?
 
Well, they said they've asked Eve about this and they are waiting for an answer. But I'm kinda running out of patience.
Understandable.

Give it a bit more time. Try sending them an email tomorrow to just check how things are going on that front.

I would find it strange if a business that supposedly orders several containers worth over 100k € every month or so from EVE, would have to wait much longer to get an answer about suspicious cells with stickers instead of genuine laser-etched codes on them in their order.

Patience.


Technically speaking, a few hundred euros is not worth it for a business to noticeably degrade its reputation over it.

I have no horse in this game, at best maybe as a returning(or not) customer. And the fact I would like to see them do right by you.

You did not go cheap, you saved up and paid the price business asked for genuine A grade EVE cells.


I hope NKON does right by you. I was thrilled to find out there's a business in the EU that deals directly with EVE and offers Grade A cells.

Frankly, I would be disappointed if I could no longer consider them as an option.
 
I just purchased 16 of EVE 105 here in the US for $38 each with a good results after capacity test. I check the QR code and they have production of July last year if i don't recall wrong. Cells looks square no puff. Tested good.
Not sure if is ok sharing seller. I am new here in the forum. View attachment 192883View attachment 192884View attachment 192885View attachment 192886View attachment 192887View attachment 192889View attachment 192890
I'm happy for ya, really. Looking at the bolts yours are different and better looking. Mine are shorter and lack washers. I didn't give it much thought, but should have been a warning sign because they were different from the pictures. What kind of battery tester did you use?
If they are legit peeling the sticker should have the qr code in laser right?
Why should I do that? The codes are supposed to be etched and readable through the transparent window at the top of the cells, no stickers and no peeling needed. Actually removing the top of the cell would void warranty. I suspect that there are either other QRs under the sticker or the original QR has been sanded. It's not me who should do the detective works. It's seller's duty to provide warranty and handle their supply chain.
I just want the cells I paid for.
 
I'm happy for ya, really. Looking at the bolts yours are different and better looking. Mine are shorter and lack washers. I didn't give it much thought, but should have been a warning sign because they were different from the pictures. What kind of battery tester did you use?

Why should I do that? The codes are supposed to be etched and readable through the transparent window at the top of the cells, no stickers and no peeling needed. Actually removing the top of the cell would void warranty. I suspect that there are either other QRs under the sticker or the original QR has been sanded. It's not me who should do the detective works. It's seller's duty to provide warranty and handle their supply chain.
I just want the cells I paid for.
This one. https://www.aliexpress.us/item/3256...9204640.1005001458325206&gatewayAdapt=glo2usa

But I want to buy the 600W version,

 
Understandable.

Give it a bit more time. Try sending them an email tomorrow to just check how things are going on that front.

I would find it strange if a business that supposedly orders several containers worth over 100k € every month or so from EVE, would have to wait much longer to get an answer about suspicious cells with stickers instead of genuine laser-etched codes on them in their order.

Patience.


Technically speaking, a few hundred euros is not worth it for a business to noticeably degrade its reputation over it.

I have no horse in this game, at best maybe as a returning(or not) customer. And the fact I would like to see them do right by you.

You did not go cheap, you saved up and paid the price business asked for genuine A grade EVE cells.


I hope NKON does right by you. I was thrilled to find out there's a business in the EU that deals directly with EVE and offers Grade A cells.

Frankly, I would be disappointed if I could no longer consider them as an option.
It is Chinese new year..
China is closed for 2 weeks, no matter how big the order
 
It is Chinese new year..
China is closed for 2 weeks, no matter how big the order

Contrary to the impression my words may have left, I want NKON to succeed, but only NKON can make sure of that. Not me, I have no say in how they run their business, nor I'm affiliated with it.

If I were to run a business that in its entirety depends on doing a business with another business that operates in another country with a different language and culture, and do so for over a year, rest assured I would be very familiar with their language and culture and would be prepared for the cease of operation of the business in question during their national holidays.

And do so, by simply making sure there's a sufficient number of extra units in the shipment to make sure I can fulfill the part of the deal of replacing the bad or inadequate units for a decent portion of orders in the batch during the Chinese holiday period, and sort out the matter with EVE when possible.

Later, the remaining units can be redirected to orders made within the holiday timeframe.

Just my 2 cents.


Once again, I hope NKON does right by the OP.



@marksman

Just a thought,

You've probably already done this, but have you tried to assemble the battery and run a few charge cycles with your solar system, and let the BMS do its thing balancing and bringing the cells to life so to speak?
 
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I tried to balance the cells and it didn't turn up good, as I've previously stated. The charging current didn't go to zero. I tried charging individually, but only got to do it for two cells and one settled well below 3.600V. Bummer.

Also, I don't know what is under that sticker: a recycled cell? a lower spec cell? an out of spec cell?
 
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I tried to balance the cells and it didn't turn up good, as I've previously stated. The charging current didn't go to zero. I tried charging individually, but only got to do it for two cells and one settled well below 3.600V. Bummer.
Do you have a shunt installed in your system?

Maybe you could do a few charge-discharge cycles to try balancing the cells further and get a sense of just how much capacity are you getting out of the battery on each cycle and observe if the cells are improving.

Also, I don't know what is under that sticker: a recycled cell? a lower spec cell? an out of spec cell?
That's something probably only EVE could shed some light on with certainty.
 
Contrary to the impression my words may have left, I want NKON to succeed, but only NKON can make sure of that. Not me, I have no say in how they run their business, nor I'm affiliated with it.

If I were to run a business that in its entirety depends on doing a business with another business that operates in another country with a different language and culture, and do so for over a year, rest assured I would be very familiar with their language and culture and would be prepared for the cease of operation of the business in question during their national holidays.

And do so, by simply making sure there's a sufficient number of extra units in the shipment to make sure I can fulfill the part of the deal of replacing the bad or inadequate units for a decent portion of orders in the batch during the Chinese holiday period, and sort out the matter with EVE when possible.

Later, the remaining units can be redirected to orders made within the holiday timeframe.

Just my 2 cents.


Once again, I hope NKON does right by the OP.



@marksman

Just a thought,

You've probably already done this, but have you tried to assemble the battery and run a few charge cycles with your solar system, and let the BMS do its thing balancing and bringing the cells to life so to speak?
Didn't get the impression that you wanted nkon to fail, just stated a rather obvious thing..
It is Chinese new year, good luck in getting any answers from china during that period ;)
 
And I've got an email. Basically it says that Eve confirms that sometimes the etching is not clear and then they print the QR on a sticker and put it over the etched QR and these stickered cells are no different than the others.
I've asked for written permission to peel the stickers without voiding warrranty and see if there is any trace of an identical QR over there. If there is not, I call bulls**t and invoke warranty. If there is, well, Eve is kinda sketchy.
 
And I've got an email. Basically it says that Eve confirms that sometimes the etching is not clear and then they print the QR on a sticker and put it over the etched QR and these stickered cells are no different than the others.
I've asked for written permission to peel the stickers without voiding warrranty and see if there is any trace of an identical QR over there. If there is not, I call bulls**t and invoke warranty. If there is, well, Eve is kinda sketchy.
did NKON forward the official EVE email ?
 
This is sounded like some fairy tale the company is making up, you should look under the qr code. I have not seen this before and why hasn't this come up on any other cells before. Most of these companies with real grade A also give you a test report like 18650batterystore and sunfunkits, did you get it with your cells?
 
No, I did not. However, after I started my email exchange with them, I got a large excel file, with 5000+ entries, which contain voltages and capacities for each cell in the shipment. Found mine there, towards the end of the list, 4000 hundred-ish, with voltage matching my measurements as they arrived. I've scribbled the values on the top of each, and after getting the Excel it was a surprise to see they matched.

did NKON forward the official EVE email ?
No, I only got a quote of a few lines out of it.
 
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however that doesn't explain the top balance symptoms OP described
I'm currently trying to balance individually. On the 3.362 V cell it managed to charge to 3.638 V, end current was 0.01 A, I called it a win. I have 4 more to go, these came to rest at 3.512 V. The other 4 came to rest at 3.575 - 3.590V after individually balancing, almost the same as the good batch (3.580-3.600).
 
Cells are holding the charge pretty good and balanced after 2 hours of finish charging


11.jpg
 
The saga continues. My communication with Nkon has apparently gone cold, it's more than a day since I've proposed to check if there is a trace of the same QR on the cells, under the stickers, and no reply.

In parallel I've contacted Eve to find out whether the stickered code is something they usually do or am I looking at a sketchy cell. I provided a picture and asked for their opinion. This trail has gone cold, apparently they passed my email address to a middleman, who promised me a good deal on Eve batteries. I asked them the same question: is the stickered cell an original Eve? Got an automatic reply stating they will get back to me in two days.

I'm not sure whether I'm going to pursue this matter forward. Sure, I can file a complaint with the European Consumer Center and show them the email exchange with Nkon, and maybe get some compensation. Money can't buy trust and I wish this thread didn't exist, I do not want harm done to anybody but I felt cheated when I discovered the stickers.
 

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