ArthurEld
Solar Wizard
Are you going to capacity test the assembled battery?
Are you going to capacity test the assembled battery?
do you have a link to "Amy Way @ Luyuan " that some one cand find their online store easy?Not in any serious way. Because I'm full of fuckwithery, I'll probably deliberately run it down to near empty as a pseudo-cap test.
The battery will perform as good as the weakest cell, so I'm pretty confident that I'll get at least 300Ah out of it as my typical usage will be about 10A.
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.
Message her and find out.so what does contacting her directly do for you? I just added 16 cells to an order on the web page and it was 111.00 cdn per cell plus 500 in shipping.
Message her and find out.
When I contacted her on order #1, she gave me pricing less than on the website. I also got a slight discount for being a forum member. Also, any issues were explained to me, such as going to the size BMS I wanted versus what was listed on the sight.
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.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.
32 cells in theItchy itchy finger!!!!!
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?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.
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 really have no idea. It seems most cells initially deteriorate fairly quickly and then smooth out to a lower rate.
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.
Sorry, I mean you. In one of the early posts in this thread you mentioned you were on 24v in response to a question.Are you talking to anyone specific?