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Purchasing 32- Eve 304 ah cells or 32- CATL 302 ah cells which one is best advice needed

CATL does not sell to anyone outside of OEMs, all CATL that you in the market is grey unauthorized, more than likely out of decommissioned vehicles. We have contacted them, the minimum require quantities would be in the millions.

EVE only recently started selling to smaller companies.

We are currently getting financing ready, however, I must make sure you are aware. As much as we would like to assist in this group buy effort, We are NOT going to be able to match the price of Overseas sellers. Expect US pricing of stock to be 1.75x. This is due to the following.

Back to price:

1) The cost of importing the minimum quantity with tariff taxes, brokers, sea freight and hazmat will be $126.44/cell that is buying 1728 quantities.
2) Additional servicing would need to be done such as adding laser welded studs (this will be done in the U.S. to ensure quality)
3) The landed cost will be about $135.00 and you can expect them to retail for about $200.00/pc

So you can see in the end it will be about $800.00 before shipping for a set of 4, however, it will be real genuine LF280K or LF304. As you can see, it is possible to acquire them for less through Alibaba, however, Alibaba comes with some risks and many months of waiting. If purchased in The U.S. you would have recourse for issues and support.
I had considered importing some myself, and yes, $200 to $250 was the range where you could turn a profit.
 
Just thought I would share some of the test date Amy sent me for my EVE 304 ah cells. This is the test data from EVE on 8 of my 32- new grade A 304 AH EVE cells the rest of the cells looks just like these so I am very pleased with tested ah results of each cell from EVE. Now if I can get close to these numbers with my ah test I will be a happy camper. Does everything look ok with these numbers for the new 304 ah cells to you guys.
Code Details
r_2.gif
NoCodeCapacity(Ah)OCV1(V)Ri1(mohm)OCV2(V)Ri2(mohm)OCV3(V)Ri3(mohm)
1​
04QCB73712200JB6M​
321.7872​
2.790​
0.16​
2.775​
0.16​
3.298​
0.15​
2​
04QCB73712300JB6M​
321.0270​
2.790​
0.16​
2.774​
0.16​
3.298​
0.15​
3​
04QCB73712300JB6M​
321.1494​
2.790​
0.16​
2.776​
0.16​
3.298​
0.15​
4​
04QCB73712300JB6M​
321.1622​
2.791​
0.16​
2.777​
0.16​
3.298​
0.15​
5​
04QCB73712200JB6M​
321.7238​
2.795​
0.15​
2.781​
0.15​
3.298​
0.15​
6​
04QCB73712200JB6M​
321.7448​
2.790​
0.16​
2.776​
0.16​
3.298​
0.15​
7​
04QCB73712300JB6M​
321.8252​
2.795​
0.16​
2.781​
0.16​
3.298​
0.15​
8​
04QCB73712300JB6M​
321.6727​
2.795​
0.15​
2.785​
0.16​
3.298​
0.15​
Heya Hotrod.
My EVE LF304 cells arrived today from Basen. Thankfully no obvious damage on first inspection!
Firstly, thanks for sharing the Code reference details as I was a little concerned as I unpacked my cells earlier this evening as I did notice a slight inconsistency with the QR Codes for all but one of the cells.

15qty of my cells match the 04QCB7371000J but do not reference any LF304 element as such. Perhaps we just need to confirm the "Specification Code" which are apparently the values after the CB. I have attached an apparent LF208
1qty of my cells has a totally different reference. 04QCB7372000J and also clearly shows a LF304 and 972Wh

I will start the top balancing tomorrow and then on the weekend a full charge so I can confirm what capacities I have actually been sent.

Cheers
 

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Heya Hotrod.
My EVE LF304 cells arrived today from Basen. Thankfully no obvious damage on first inspection!
Firstly, thanks for sharing the Code reference details as I was a little concerned as I unpacked my cells earlier this evening as I did notice a slight inconsistency with the QR Codes for all but one of the cells.

15qty of my cells match the 04QCB7371000J but do not reference any LF304 element as such. Perhaps we just need to confirm the "Specification Code" which are apparently the values after the CB. I have attached an apparent LF208
1qty of my cells has a totally different reference. 04QCB7372000J and also clearly shows a LF304 and 972Wh

I will start the top balancing tomorrow and then on the weekend a full charge so I can confirm what capacities I have actually been sent.

Cheers
Both QR codes have an "A" date which would be 2020. I just interpreted and explained the date code confusion in another thread. It is obvious that EVE is cutting and pasting portions of their product sheet and mixing things from various battery versions. Did you get the spreadsheet for your cells? If they included the header of the spreadsheet, it would show the date they received them. Just like with my LF280s theoretically made in 2020 and sold in 2021, it seems to be the case with the LF304 as well.
 
Both QR codes have an "A" date which would be 2020. I just interpreted and explained the date code confusion in another thread. It is obvious that EVE is cutting and pasting portions of their product sheet and mixing things from various battery versions. Did you get the spreadsheet for your cells? If they included the header of the spreadsheet, it would show the date they received them. Just like with my LF280s theoretically made in 2020 and sold in 2021, it seems to be the case with the LF304 as well.
Sorry, no didnt get any spreadsheet or anything remotely like it. I asked for the lf304 spec sheet and thats what i have uploaded into the resources section of this forum. It doesn't go into the qr code schema like other eve documents do.

Basen responded to my query around the inconsistency of qr codes (1qty with the lf304 shown) and said they were different batches and totally normal and expected.
 
I have mentioned in a previous post about how horrible their documentation is. For instance, I found your LF304 upload and right in the beginning it says, "2.2 Model:LF280N."

Huh....
 
Heya Hotrod.
My EVE LF304 cells arrived today from Basen. Thankfully no obvious damage on first inspection!
Firstly, thanks for sharing the Code reference details as I was a little concerned as I unpacked my cells earlier this evening as I did notice a slight inconsistency with the QR Codes for all but one of the cells.

15qty of my cells match the 04QCB7371000J but do not reference any LF304 element as such. Perhaps we just need to confirm the "Specification Code" which are apparently the values after the CB. I have attached an apparent LF208
1qty of my cells has a totally different reference. 04QCB7372000J and also clearly shows a LF304 and 972Wh

I will start the top balancing tomorrow and then on the weekend a full charge so I can confirm what capacities I have actually been sent.

Cheers
Man I'm glad you have received your cells From Shenzhen Basen and they arrived in good shape. My QR codes are very similar to the ones you have posted, 04QCB73712300JB6M-------. The 32 Eve 304 ah cells I ordered are coming from Amy with Shenzhen Luyuan She has been super helpful on every question I have ask her through this whole process. She has also sent me the test data from Eve on every cell that I have coming with each batteries QR code number and information attached. According to the paper work from Eve's test results the lowest ah capacity cell was at 320.6724 ah and the highest ah capacity was 322.3868 ah. So If I get close to these numbers with my test results I will be a happy camper for sure. I started talking to Amy about the new 304 ah cells on 7/09/2021 and then actually placed My order for these cells on 7/14/2021, It looks like my cells are on the ship docked at the port in Los Angeles getting ready to be unloaded, so hopefully I will see some movement on my UPS tracking number before to much longer.
 
Man I'm glad you have received your cells From Shenzhen Basen and they arrived in good shape. My QR codes are very similar to the ones you have posted, 04QCB73712300JB6M-------. The 32 Eve 304 ah cells I ordered are coming from Amy with Shenzhen Luyuan She has been super helpful on every question I have ask her through this whole process. She has also sent me the test data from Eve on every cell that I have coming with each batteries QR code number and information attached. According to the paper work from Eve's test results the lowest ah capacity cell was at 320.6724 ah and the highest ah capacity was 322.3868 ah. So If I get close to these numbers with my test results I will be a happy camper for sure. I started talking to Amy about the new 304 ah cells on 7/09/2021 and then actually placed My order for these cells on 7/14/2021, It looks like my cells are on the ship docked at the port in Los Angeles getting ready to be unloaded, so hopefully I will see some movement on my UPS tracking number before to much longer.
Glad to hear things are going well for you on the order. I am not familiar with those cells. Are you set up to do load testing?

Aside from the model and mfg plant being different, those are 2021 batteries va. 2020 batteries. B6M on yours is a 2021 date code.

best wishes
 
Glad to hear things are going well for you on the order. I am not familiar with those cells. Are you set up to do load testing?

Aside from the model and mfg plant being different, those are 2021 batteries va. 2020 batteries. B6M on yours is a 2021 date code.

best wishes
I've got a I-charger X12 I'm wanting to use I know it will take for ever but that's all I've got right now. I've also been looking at a

EBC-A40L​

EBC-A40L high current lithium battery iron lithium ternary power battery capacity tester charge and discharge 40A​

but it will only charge or discharge 1 cell at a time. But I do like how you can view the test data on a computer. Do you have a better suggestion on what I can use without breaking the bank. I'm leaning very hard towards the Batrium WatchMon Core with the CellMate-k9 for my bms for these batteries
 
I've got a I-charger X12 I'm wanting to use I know it will take for ever but that's all I've got right now. I've also been looking at a

EBC-A40L​

EBC-A40L high current lithium battery iron lithium ternary power battery capacity tester charge and discharge 40A​

but it will only charge or discharge 1 cell at a time. But I do like how you can view the test data on a computer. Do you have a better suggestion on what I can use without breaking the bank. I'm leaning very hard towards the Batrium WatchMon Core with the CellMate-k9 for my bms for these batteries
If you can get it for a reasonable price, I would highly recommend it. Not only will it make short work of capacity testing, but you can save the data files and compare cell degradation in a year or two. No problems with full 40 amp charge and discharge rates.
 
Wish I could justify the costs. Between a PS and the load tester, that is a few bucks for something that might not be used again. I have way too many one use and even some no use ever tools.
 
If you can get it for a reasonable price, I would highly recommend it. Not only will it make short work of capacity testing, but you can save the data files and compare cell degradation in a year or two. No problems with full 40 amp charge and discharge rates.
I thought they were about 160.00 on ali express but what I didn't realize they add 100.00 for shipping and now that I'm trying to find 1 looks like it will cost around 260 to 270 to get one. So I may have to stick to my X12 I-Charger for now.
 
I got the $70 PS pretty much everyone has bought and the $50 tester. I have other tools used in the testing like the DVM, but I bought the PS and tester specific to this battery purchase. And frankly, if I hadn't been lead to believe I was getting old crappy cells, I likely wouldn't have bought either item. When I got my Lishens, I didn't test them, I assumed they were good. I didn't know you should discharge and charge them from time to time, so I will be doing my older Lishens after I do the EVEs.
 
I got the $70 PS pretty much everyone has bought and the $50 tester. I have other tools used in the testing like the DVM, but I bought the PS and tester specific to this battery purchase. And frankly, if I hadn't been lead to believe I was getting old crappy cells, I likely wouldn't have bought either item. When I got my Lishens, I didn't test them, I assumed they were good. I didn't know you should discharge and charge them from time to time, so I will be doing my older Lishens after I do the EVEs.
Which PS and tester did you purchase
 
My first (4) capacity test results are in.
All (so far) exceed the 304Ah rating.
#1 311.11Ah (12h34m) [180W loadtester]
#2 309.64Ah (13h08m) [180W loadtester]
#3 321.29Ah (20h25m) [icharger x8]
#4 in progress
#5 317.5Ah (20h09m) [icharger x8]

I am using what seems very similar to that 2nd URL @Stepandwolf has shared. I have also been using my junsi icharger x8's to capacity test as well as charge the individual cells as well as previously the paralleled pack.

I'm not overly happy with the 180W load tester as it definitely has a voltage reading misalignment. Will eventually repeat each cell with the alternative and see how they differ.
 

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I thought they were about 160.00 on ali express but what I didn't realize they add 100.00 for shipping and now that I'm trying to find 1 looks like it will cost around 260 to 270 to get one. So I may have to stick to my X12 I-Charger for now.

It won't charge, but handy for either 40 amp cell, or 26 amps for 12v battery packs.

You could also get a Kunkin KP-184 which has remote voltage sense (i.e. accurate voltage reading from the battery), however the Kunkin is a royal pain to set up due to the display. Both are good quality.


And yes, I paid $176 (including shipping) for the EBC-A40L, but they jacked up both price and shipping as soon as I received it.

 
My first (4) capacity test results are in.
All (so far) exceed the 304Ah rating.
#1 311.11Ah (12h34m) [180W loadtester]
#2 309.64Ah (13h08m) [180W loadtester]
#3 321.29Ah (20h25m) [icharger x8]
#4 in progress
#5 317.5Ah (20h09m) [icharger x8]

I am using what seems very similar to that 2nd URL @Stepandwolf has shared. I have also been using my junsi icharger x8's to capacity test as well as charge the individual cells as well as previously the paralleled pack.

I'm not overly happy with the 180W load tester as it definitely has a voltage reading misalignment. Will eventually repeat each cell with the alternative and see how they differ.
I had the same issue and to compensate, I had to change my low voltage cutoff to 2.2V vs. 2.5V.

Surprised the range of results you got, quite a spread from 309 to 321. Is that because of changing testers, or do you think that swing is corrrect? I know I just finished my 4th EVE LF280 and so far they are all 286-288.

Oops...I misspoke, I had just finished my 5th cell, still all 286-288. Last cell was 287.1.
 
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Looks like the difference is because of two different testers. The X8 looks to be reporting higher results and is probably the most accurate.
 
Do any of you guys use the Batrium WatchMon Core with the CellMate K9's The K9's are for up to 16s batteries and looks like you can string several in a row for more than 1 48 volt battery. From what I can find out they do not have a program yet for the Batrium to be able to talk to or control my 12KW Growatt inverter. So how would the batrium disconnect the charge or discharge to the battery from my inverter if the inverter goes off the deep end and doesn't control the charge or discharge. I know the batrium does not have the battery currant from the ground wire go through the unit. Would I need to install a 48v Continuous Duty Relay / Solenoid Switch and let the Batrium disconnect it if something goes wrong. Is this the best way to do this or is there a better way.
 
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