2nd Buy from Amy Wan/Luyuan

[E. Cho]

so what does contacting her directly do for you? I just added 16 cells to a order on the web page and it was 111.00 cdn per cell plus 500 in shipping.

The instructions that I read on the Luyuan Alibaba website EXPLICITLY ask that you ignore the Alibaba shipping estimate AND that you CONTACT HER DIRECTLY by messaging for a more accurate shipping estimate.

For my location, the Alibaba shipping estimate was nearly 4x higher than the fee calculated by the shipping company that she uses when she gave them exact details. I used the cart to get a rough estimate to organize the items for her, but in the end, the cart was not used, she replied via messaging with specific (different) amounts for most items including shipping and then she created an Alibaba invoice. The cart ended up never being used and I deleted it after I made payment via credit card, which went through immediately and cleanly.

I would guess, that given how good she has been with my order, that if you went through and used the Alibaba cart, she might try to contact you anyway to let you know of adjusted pricing? Not sure what would happen if you ignored her messaging other than you could over pay?

 

[Steve_S]

ALWAYS get Direct Quotes from ANY Vendor on Ali Baba/Express !
The listed prices in the product pages get revised more often than the pages do.
Shipping & Handling is ALWAYS a GUESStimate with the automated system, it is Never Accurate... ALI* is NOT Amazon or EBay.
Also talking with a rep, can Save you Money because if you buy more of the smaller bits & pieces (BMS, wires etc) they can usually "Bundle" that into the rest of the order and save on S&H. That can add up REALLY FAST TOO !

 

[740GLE]

Itchy itchy finger!!!!!

 

[S Davis]

Itchy itchy finger!!!!!

32 cells in the

 

[JJJJ]

Saving up for the next purchase. Looking to update to the battery cases, update my Overkill to JK BMS and likely add in a batch of 280s.

 

[xcentric]

In case it's relevant for the UK market, had a very interesting chat with Amy for 15kWh of batteries and cases and BMS - very helpful and amenable on chat. However, the total cost to my door is about £350-400 less than I can buy a prebuilt battery from Fogstar, also delivered, with the advantage of UK warranty. To me, that makes it a marginal choice - it is cheaper, but not by much, and I'd have to learn how to build it (not too hard, but a mistake is costly), and take time to do it. Decided it's currently not worth the hassle. YMMV. I do appreciate £400 is 8 solar panels though!

 

[740GLE]

For me warranty is kinda pointless as shipping would stop me from doing anything further. I’d much rather try and fix it on my own.

A cheap JK BMS is pretty much the only thing that could fail (other than a lose terminal that I’d blame myself). So $70-$90 for an 8s is a steal even if I have to replace it again.

 

[J_Iu]

DANG! 70A is suhwheeeeet...

I'm using the 70A to charge from the ~33% as received SoC and then discharge. Takes just under 8 hours to fully cycle a cell, and it's totally hands-free. To keep that one cycling, once discharged, it's onto the 30A charger for 3 hours to get exactly 90Ah in them.

Results have been wicked consistent.

305.6 - 30A to 2.5V
306.1 - this one is likely a little higher due to the two separate discharges (70A to 2.5V followed by 30A to 2.5V) with an extended rest in between.
305.7 - 70A to 2.5V, hold 2.5V and taper current to 30A

Confidence is up, so I'll be starting a cycle before bed. I'll be able to test two cells per day. Looks like I'll be testng all of them...

From your capacity test results, the 280ah was actually testing 306ah and I want to ask, will the 306ah capacity remain till the battery lifespan start dropping?
I was told that if you purchase Grade A 125ah cell for example and the actual testing capacity from the test gives 130ah, it will certainly fall back to 125ah after the few months of usage. I don't know how true it was.

 

[sunshine_eggo]

From your capacity test results, the 280ah was actually testing 306ah and I want to ask, will the 306ah capacity remain till the battery lifespan start dropping?
I was told that if you purchase Grade A 125ah cell for example and the actual testing capacity from the test gives 130ah, it will certainly fall back to 125ah after the few months of usage. I don't know how true it was.

I really have no idea. It seems most cells initially deteriorate fairly quickly and then smooth out to a lower rate.

 

[J_Iu]

I really have no idea. It seems most cells initially deteriorate fairly quickly and then smooth out to a lower rate.

From your experience, do you think your actual testing 306ah capacity gotten from the 280ah you purchased will remain till the battery lifespan start dropping?
I think people that have used similar products for some times now should be able to tell if the capacity has dropped to the original capacity or not.
Amy should have knowledge about it too.

 

[robbob2112]

Question - Why are you on 24v verse 48v that it seems most everyone else uses? Doesn't really matter from a cells and capacity standpoint, just how they are assembled.

 

[sunshine_eggo]

Question - Why are you on 24v verse 48v that it seems most everyone else uses? Doesn't really matter from a cells and capacity standpoint, just how they are assembled.

Are you talking to anyone specific?

 

[robbob2112]

Are you talking to anyone specific?

Sorry, I mean you. In one of the early posts in this thread you mentioned you were on 24v in response to a question.

 

[sunshine_eggo]

This is a little side project for my home office and for limited house backup. 24V/3kW AiO cheaply acquired.

My off-grid system is 48V.