LiFePo4 legit offer?

[Jordan]

Wonder, did you get those batteries finally ????

[stekicar]

Errrr, bank "handle" fee is actually a racket you have to pay to the banksters, so they can stay rich ...

[Paul Land]

"Legit" was more related to battery specification, not if company is legit or not. Transaction is secured by Alibaba and in case that delivered goods are not per agreement they get involved in dispute. I talked to Alibaba representative and he explained the process of dispute pretty well. As for the warranty, it is same in US per my experience, it is just a sales pitch. I asked them about warranty and they say that they will guide me on how to test the battery and if bad they will ship new one(s) for free.
Offers I got were pretty similar, within $100, shipping included.
As for the discharge rate it can peak at 2C but they state 1C continuous. Capacity was rated for 0.2C as per battery specification. My concern was mostly about internal resistance which is stated at 0.1 to 0.2 miliOhms. Doesn't this sound too low for LiFePo4 batteries? I was expecting something like 0.4-0.5 miliOhms.
Here is the quote detail:
Battery Quote.png
Second offer states that batteries are grade B from CATL and they have 0.8miliOhms internal resistance for this batch. Previous batch had 0.4miliOhms.
As long as all batteries in pack are within certain range for IR I think it will be ok for my application. My theoretical max amperage is 350Amp.

Oh my GOD! that $30.00 is Trumps tariff deff, a deal killed. Its not the Chinese crap its the tariff!!

[stekicar]

Well, I do not know for Costa Rica. You will have to check with their customs. You can also check with sellers on Alibaba. They can check through their shippers.

[vincent1984]

How about shipping them to Costa Rica? Is this free of duty for Solar Panel as the article below is saying?

https://usgshipping.com/shipping-to-central-and-south-america/shipping-to-central-america/shipping-to-costa-rica-from-us

I know Costa Rica is after the renovable energy but not sure if there is local manufacture or we must have to export it from the US or China?

[stekicar]

And price includes shipping, any custom fees, doo to door.

[Ampster]

You might want to check your math.

Thanks for the tip. . The price per kWhr is even better at $185. per kWhr.
240x3.2x48 equals 36,684

$6830 divided by 36.864 equals $185.27. per kWhr.
My assumption used a nominal voltage of 3.2 volts per cell or a pack voltage of 51.2 volts

[stekicar]

240Ah times 3 for batteries in parallel times voltage

https://convert-formula.com/ah-wh

[J.P.M.]

Wow! That is $212 per kWhr. (240x3.2x48=32kwhr)
I understand why you want to give this a chance.
Those look similar to CALB cells. If they are the same or similar I believe the case needs to be insulated. Easy enough to do at that price. I have been using modules from Nissan Leafs and my last ten cost me more per kWhr than that. I even priced Tesla modules whic were $250 per kWhr. Do you have any detailed specs?

You might want to check your math.

[stekicar]

Yes I do. See attached. I asked them to send me technical specification for batteries. I also asked to send me battery test results. And they were responsive.They hid nothing for what I asked. The only thing they refused to talk about is who their customers are. They even declined to tell me if they sell more to individuals or companies which I understand. I also asked for permission to send 4 batteries to some youtube blogger and that he will do the test and they agreed to it. All of them.

[Ampster]

Wow! That is $212 per kWhr. (240x3.2x48=32kwhr)
I understand why you want to give this a chance.
Those look similar to CALB cells. If they are the same or similar I believe the case needs to be insulated. Easy enough to do at that price. I have been using modules from Nissan Leafs and my last ten cost me more per kWhr than that. I even priced Tesla modules whic were $250 per kWhr. Do you have any detailed specs?

[stekicar]

"Legit" was more related to battery specification, not if company is legit or not. Transaction is secured by Alibaba and in case that delivered goods are not per agreement they get involved in dispute. I talked to Alibaba representative and he explained the process of dispute pretty well. As for the warranty, it is same in US per my experience, it is just a sales pitch. I asked them about warranty and they say that they will guide me on how to test the battery and if bad they will ship new one(s) for free.
Offers I got were pretty similar, within $100, shipping included.
As for the discharge rate it can peak at 2C but they state 1C continuous. Capacity was rated for 0.2C as per battery specification. My concern was mostly about internal resistance which is stated at 0.1 to 0.2 miliOhms. Doesn't this sound too low for LiFePo4 batteries? I was expecting something like 0.4-0.5 miliOhms.
Here is the quote detail:
Battery Quote.png
Second offer states that batteries are grade B from CATL and they have 0.8miliOhms internal resistance for this batch. Previous batch had 0.4miliOhms.
As long as all batteries in pack are within certain range for IR I think it will be ok for my application. My theoretical max amperage is 350Amp.

[BoloMKXXVIII]

Discharge rates have less to do with quality and more to do with chemistry. For motive application one would want a high discharge rate. For stationary applications discharge rate is less important..

Yes, my experience with lifepo4 is more "motive" in nature.

[Ampster]

Is it just me or do they both seem to have a low C rating for discharge? I may be wrong but I always thought that was one indicator of quality. ........Are you saving much over going with lifepo4 batteries sold in the US? What is the warranty and what is their reputation in honoring that warranty. If a cell must be replaced, do you have to pay for shipping the old cell back and the new cell to you? I am curious.

Discharge rates have less to do with quality and more to do with chemistry. For motive application one would want a high discharge rate. For stationary applications discharge rate is less important.

I agree with your second point. A good distributor can significantly derisk a transaction..

[Ampster]

I emphasize the word " some "......

Precisely. And that is why I specifically didn't use "most" or "many". The majority have purchased from US based distributors with a greater certainty. When I converted a VW to electric I found a local distributor that had good prices and allowed me to pick up the cells and save freight.