Our NEW GO-TO LiFePO4 vendor...09.20.21

MrM1

I'm Here, But I'm Not All There
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Ok ... I ordered "EVE" 230Ah cells on Saturday from the TX warehouse, Arrived today. Here is what I got. (so I do not hijack this thread)

How do I know they are actually "EVE" cells? There is nothing that indicates manufacture.
 
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ghostwriter66

"Here - Hold my Beer"
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From LA -work in South Texas/New Mexico region
Are the cells from the Houston warehouse available with matched IR? Looking for 64 of the 280AH+ cells.

so this may have been answered already BUT virtually all of the 64 cells we got was very close in IR .... getting matched IR is sort of like saying getting "matched wiper blades" but I understand your concern ... as for us .. after a week of blasting the 64 280Ahs we have had no problems ... we put them on a pump and literally blasted 0.75C discharge and 1C charge for about 5 days straight - sure our BMS is giving us the big middle finger salute but the batteries are doing fine ...

SOOOO the trick for DONCAN - to get a huge market here in the States is 3 things:

1. Set up the capability to mail out fo the CA warehouse directly to ppl via FEDEX or UPS.
2. Don't get greedy - keep prices where they are for as long as you can. PPL will pay "slightly" more so as NOT to have to wait 3 months for batteries that are dropped, damaged, torn up ...
3. Maintain a good supply so ppl don't have to wait. Personally I would focus on 200's and 280's .... I have my engineering reasons for not going much over 280's but that's a different topic ...

OH - and 4. You guys need to carry BusBars and 6mm studs for 200's and 280's that people can purchase separately .... Honestly the guys in Houston could probably get one of the local shops on the Southside to make a few 1000 of each for pennies ...

If DONCAN can do this right they can absolutely make a very good profit ...

Don't get greedy - seriously.... do this right and you will have lots of good customers ... you know that 200 other companies are reading this and saying "Hey we can do this" and the issue is most of them can - but it will take time for them to start up and build a reputation .. YOU have that already ....

And on behalf of my ancestral countryman - Happy 72nd Birthday China ...
 

ghostwriter66

"Here - Hold my Beer"
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From LA -work in South Texas/New Mexico region
Different brand, EVE 304Ah and CATL 302Ah, usually EVE 304Ah will reach to 320Ah, and CATL 302Ah will reach to 310Ah.

Agree - with a slight caveat -- after about 10 full DoD cycles really pushing them they will settle down to their right Ah listed specs and stay there for the next decade ... or at least thats what i have found on the first few 1000 that i have done .... LOL
 

ghostwriter66

"Here - Hold my Beer"
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From LA -work in South Texas/New Mexico region
How do I know they are actually "EVE" cells? There is nothing that indicates manufacture.

1. to answer your question about why weight is important -- Stored ENERGY within specific mediums has a specific weight .. This means that overall - and depending on manufacturer - a certain 280Ah from a certain manufacturer should weigh X .. as should the 200, etc etc ... for every battery manufacturer we use and every associated AH, my techs will randomly weigh batteries to see if they are in that range or not ... if they are LIGHT on the scale then they will come up short (I guarantee you) in the rated AH capacity .. if they are heavy - well you kinda hit the bonus round ....

Unfortunately I can't share that info because its got proprietary stuff all over it from my company -- BUT if you reach out directly to EVE or CATL or THE manufacturer and ask for that spec sheet they will email it to you (pdf) usually very quickly ...

To answer your question there are a few ways to tell if its an EVE or CATL but it involves 10's of thousands of dollars worth of equipment, 2 sheep, and a bottle of tequila. Personally I would just go with saying they are what you ordered BUT the most important thing is doing the capacity tests ...

The capacity test - (and the IR test in a small way) - will tell you what the insides look like ... you could have a battery that looks fine and has the new car smell but could have been dropped hard on its side and the plates have changed zipcodes within the container ... the battery will probably function -- like a truck with a bad fuel injector -- it will work but not the way you wish ....

slight correction - it was one sheep and one goat ....
 

curiouscarbon

Science Penguin
Joined
Jun 29, 2020
Messages
1,535
99 CATL cells on the wall.. 99 CATL cells.. 😬

thanks for sharing insights on how to approach these “medium/large” format cells (~200-300 in my head)

thanks to the multitude of advice around the forum, i finally decided to build a 4S pack with 280Ah studded cells.

cheers
 

Shale MacGregor

Solar Addict
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Sep 5, 2021
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230ah Got part of the order today. IR looking good and voltage / charge rate looking good. Doing a discharge test tonight. Will order more if they have them.
 

FlyinAndy

New Member
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Dec 13, 2019
Messages
5
Ok ... I ordered "EVE" 230Ah cells on Saturday from the TX warehouse, Arrived today. Here is what I got. (so I do not hijack this thread)

How do I know they are actually "EVE" cells? There is nothing that indicates manufacture.
Received half my order today. Same results as you. They came with welded studs! Yay! So far I'm very happy. :)

Big thanks to @ghostwriter66 for introducing us to this vendor!

Also big thanks to @Jenny Wu for great, fast customer service!
 

Jenny Wu

Docan Technology(Shenzhen) Co.,Ltd (Direct Sales)
Joined
Aug 27, 2021
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48
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China & USA
230ah Got part of the order today. IR looking good and voltage / charge rate looking good. Doing a discharge test tonight. Will order more if they have them.
The stocks for 230Ah are already sold out around 28th Sep. We expect to receive the next batch 230Ah two months later if the sea shipment goes smoothly (really hope...)
 

MrM1

I'm Here, But I'm Not All There
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N. Central FL
to answer your question about why weight is important ...
Thank you for taking the time to respond. Good info. As to weight, not really sure what they should weigh or if the ranges I am seeing are wildly hi and low ... or about right.

New LFP 230ah cells.JPG
 

BobFlyer

New Member
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Aug 25, 2021
Messages
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50 days? I hope you're right. I'm at 101 days and still asking for tracking information and where my stuff is. I'm in Ohio. Since you're in Cali I would expect you'll get your stuff about a week faster since it doesn't have to ship ground across the USA. Good luck.
I have a order in also with Amy Wan at Luyuan for 8 cells 105ah, ordered on 9/7/2021 with a guesstimate of arrival 50-60 days with a supplied tracking number. So far no info returned on tracking number, guess this will start to show up when they clear customs? Ordering, communication with Amy Wan was good and very prompt. Just waiting game now to see when they arrive. This was thru Alibaba and Paypal transaction.
 

Jenny Wu

Docan Technology(Shenzhen) Co.,Ltd (Direct Sales)
Joined
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Messages
48
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China & USA
I have a order in also with Amy Wan at Luyuan for 8 cells 105ah, ordered on 9/7/2021 with a guesstimate of arrival 50-60 days with a supplied tracking number. So far no info returned on tracking number, guess this will start to show up when they clear customs? Ordering, communication with Amy Wan was good and very prompt. Just waiting game now to see when they arrive. This was thru Alibaba and Paypal transaction.
Hi @BobFlyer , I also heard some good reviews about them. We can also thru Alibaba order and Paypal transaction. Usually we will also provide another two options: Paypal directly and wire transfer. We have 280Ah and low stocks for CALB100Ah in US warehouse, and expect to receive 304Ah about one month later. Also more other cells are on the way. Hope this reply won't bother you. :)
 

BobFlyer

New Member
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Aug 25, 2021
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Jenny:
Forgive me for my comment, I did not realize exactly the main topic of this thread. My mistake.
 

ghostwriter66

"Here - Hold my Beer"
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From LA -work in South Texas/New Mexico region
50 days? I hope you're right. I'm at 101 days and still asking for tracking information and where my stuff is. I'm in Ohio. Since you're in Cali I would expect you'll get your stuff about a week faster since it doesn't have to ship ground across the USA. Good luck.

Did you ever get your batteries .... In all my days of doig this the longest i have hit is right at 72 ... At 75 days I would be canceling the order with my CC company ... AND if you still don't have any tracking info AND you still want to keep the order then ask them for THEIR tracking info -- it should show at this point which boat its on and where that boat is ... BUT honestly 111 days - EJECT EJECT EJECT ... JUST to be fair -- right now the PORT of LAX has 514,322 containers waiting to be off loaded ... we have had some pipeline stuff sitting in the port for almost a month waiting to get in to get it unloaded .... THATS why I think if DONCAN can figure out how to stay ahead of the inventory they will do great ... but its ppl like me that will go in and buy 64 or 128 at a time that kills them .. and you ... sorry
 
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K8MEJ

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It's more complicated than that. I had requested UPS domestic shipment rather than Fedex Ground because Fedex is the absolute worst delivery company in the USA. The cargo ship offloaded the cargo about 6 weeks ago. It took about 5 business days for the boxes to get through customs and picked up by UPS. UPS delivered one box (2 cells) and recalled the other 3 boxes. There was a warehouse fire in California and UPS recalled the packages to inspect them. Worse yet, UPS shipped the packages back to California, back to Ohio, back to California, back to Ohio (!!), then back to California. The logistics company then re-shipped via Fedex and they've been sitting for almost two weeks waiting for Fedex Ground to even pick them up.

I can't get any answers from the supplier or logistics company as to why UPS recalled their packages or why they switched to Fedex. UPS is pretty strict about haz-mat labeling and declaring what's in the packages. I can only assume that the logistics company in China wasn't totally above board with UPS or intentionally lied about the package contents. But I can't be sure.

Now that camping season is mostly over, and what is left doesn't require me to run my air conditioner 24x7, I don't need the additional battery capacity so I've been waiting. The seller is great to deal with, but her choice of logistics company sucks. Since I have two of the eight cells I ordered, if I ask my CC company to cancel, then it turns in to a mess for the seller and me, especially if the other six cells get delivered after I cancel.

As a small business owner myself, I hate to do this to the seller because I know it'll hurt them. And since the extra battery capacity isn't needed right now, I've chosen to be extra patient. All that said, I did give the seller notice that if the cells aren't picked up by COB Tuesday then I'm going to go to my CC company and start that process. I've sent an email to Jenny Wu asking if she has eight EVE 280Ah cells in stock in Houston. If not, then I might as well wait. However, despite my threat to cancel on Tuesday, I will at least give her time to see my message. I think it's a holiday in China all week.

Ugh
 

TomC4306

Solar Enthusiast
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Mar 2, 2021
Messages
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picked up by UPS. UPS delivered one box (2 cells) and recalled the other 3 boxes. There was a warehouse fire in California and UPS recalled the packages to inspect them. Worse yet, UPS shipped the packages back to California, back to Ohio, back to California, back to Ohio (!!), then back to California.

And tell us why FedEx is the worst.
 
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