LiFePo4 legit offer?

[BoloMKXXVIII]

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. Does not matter if you plan on actually using the full discharge rate. I am curious about the cost when you add up the cost of the cells, BMS, shipping, etc. 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.

[Mike90250]

........there is a lot of Lithium battery purchasing knowledge on that forum. Some have been successful buying from China.

I emphasize the word " some ".

"Good Luck Mr Phelps. ... .As always, should you or any of your I.M. Force be caught or killed, the Secretary will disavow any knowledge of your actions."

[Ampster]

......
Which offer looks more legit?

I am married to a Chinese woman and she doesn't trust any manufacturers in China unless one of her friends can verify for her. Unless you have a foolproof method of verifying the actual quality of the cells there will always be some risk. I would be especially careful about cells with higher voltages because that is when the dendrites grow the fastest. Check out diyelectriccar.com because there is a lot of Lithium battery purchasing knowledge on that forum. Some have been successful buying from China.

[stekicar]

They take care of everything. Door to door delivery.

[Mike90250]

Alibaba - unless you know the import & duty fees system well, it's a gamble. Overseas shipments of expensive electronics, unless either store promises how to walk you thru customs.

[stekicar]

I started looking for LiFePo4 battery cells on Alibaba.com. I got couple of offers and I just need help figuring out how legit they are.
Both offers are same in price, $125 for 240Ah cells. I talked to these sales persons and everything I asked they answered in timely manner and I did not get any feeling that they try to hide something. First offer is from rj-lithium.com. They state that their 240Ah battery (at 0.2C discharge rate) has 0.1-0.2 mOhms of internal resistance and they are grade A battery cells, manufactured by them. Second company is QH technology and they also offered 240Ah battery (at 0.2C discharge rate) but with internal resistance "around" 0.8 mOhms. They also stated that they get these cells from CATL as grade B cell because their voltages are "a little bit higher" than 3.2V, something like 3.23 to even 3.4V.
I have two 48V inverters, 3kW and 12kW. I pull no more than 220amps. At least, that's what my monitoring system tells me. I plan to purchase 48 cells and connect them in 3p16s and run BMS on them. Also, I use Victron SmartSolar chargers for my 12kW solar panel system.
My understanding is that all cells should be with close internal resistance among themselves so cells can discharge evenly.
Also, I am assuming that these cells are actually 200Ah cell for 0.3C discharge rate.
Second offer includes copper connectors and insulation. First one, "just batteries". Both company stated that they will match batteries for order: "Max capacity difference less than 0.5Ah. Max voltage difference less than 10mv." but I am more concerned if they match batteries for internal resistance.
Which offer looks more legit?