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Xuba Electronics: DEAL - 280AH LiFePo4 cells. Purchase & Review

There is a 49 page thread on that subject and most of it has been covered in it.


https://diysolarforum.com/threads/f...ith-low-temp-charging-protection.2884/page-49
I just finished reading through that entire thread, hoping to find the numbers for EVE cells that I could plug into my SBMS. While an interesting thread, I didn't really see much specific to EVE cells and no useful custom BMS numbers. :p There are 31 parameters in the SBMS battery setup options and most are battery-specific depending on the needs of your battery model.

(I've typed them all out into a spreadsheet along with the descriptor from the scrolling info line to make it easier to work with them holistically).

I reached out to EVE directly but they seem unwilling to help, telling me to ask the reseller for support. I'm not sure someone at Xuba is going to know the batteries as well as EVE themselves, so this brush-off is frustrating.
 
I am sure you ran across the various opinions about stopping charging at values from 3.4 per cell versus going to 3.6 per cell.

Also the BMS is only one part of a system that charges and discharges the pack. Some have a separate charge controller and and inverter that discharges the pack. Many of the key settings are in those devices. In my case the charger and discharge controls are integrated into my inverter so that is where my critical settings are. I only use my BMS for information and turn off the balancing function.
A good starting point would be to describe your system, how it will be used and the capacity and voltage of your pack. From that context maybe people here can answer your questions. I doubt you are going to get that from the manufacturer because every application will be different.
 
I am sure you ran across the various opinions about stopping charging at values from 3.4 per cell versus going to 3.6 per cell.
I did, but on the SBMS there are two possible places where one might put this value. It's not clear if 3.4 would be relevant for both, if one should be the factory spec 3.65V, or something else entirely. (being new to this, it's not necessarily clear up-front how semantics for various things might translate/equate)

A good starting point would be to describe your system, how it will be used and the capacity and voltage of your pack. From that context maybe people here can answer your questions.
I can do that. I'll start my own thread since it's a bit off-topic for this one.
 
........it's not necessarily clear up-front how semantics for various things might translate/equate
You hit on one of the most confusing items. Starting with charging there are many terms which are used that are synomous. I will wait for your thread to respond in more detail.
 
Playing with the cells and observing that they seem to be balanced is not the same as a top balance I am clear that one cell got to 4.2 volts while in series.
@ecualibrium
I wasn't very clear and realized it too late to edit. What I intended to say was that it was not clear to me that you did an effective top balance. My conclusion is based on the fact that one cell became a runner when in series. That should not happen if an effective top balance took place.

My suggestion is that you attempt a top balance by puttting them all in parallel to
top balancing per the procedures outlined on other threads. Then try to charge them again in series, watching that one cell.
 
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@ecualibrium
I wasn't very clear and realized it too late to edit. What I intended to say was that it was not clear to me that you did an effective top balance. My conclusion is based on the fact that one cell became a runner when in series. That should not happen if an effective top balance took place.

My suggestion is that you attempt a top balance by puttting them all in series and top balancing per the procedures outlined on other threads. Then try to charge them again in series, watching that one cell.
No, I haven't done an effective top balance. For a couple of reasons. Until this morning, I don't think I fully understood my options for doing so or even the reasons, and behaviors of the chemistry.
Also, I started, but it seemed on x32 280aH cells it would take a year. Now I know better, hopefully without any casualties. Thank you for your help and input.
 
@ecualibrium
I wasn't very clear and realized it too late to edit. What I intended to say was that it was not clear to me that you did an effective top balance. My conclusion is based on the fact that one cell became a runner when in series. That should not happen if an effective top balance took place.

My suggestion is that you attempt a top balance by putting them all in series and top balancing per the procedures outlined on other threads. Then try to charge them again in series, watching that one cell.
I'm sure you meant to say put them all in parallel.
 
No, I haven't done an effective top balance. For a couple of reasons. Until this morning, I don't think I fully understood my options for doing so or even the reasons, and behaviors of the chemistry.
Also, I started, but it seemed on x32 280aH cells it would take a year. Now I know better, hopefully without any casualties. Thank you for your help and input.

What configuration do you have them in and what voltage is your battery?
 
No, I haven't done an effective top balance. For a couple of reasons. Until this morning, I don't think I fully understood my options for doing so or even the reasons, and behaviors of the chemistry.
The behavior of the chemistry especially when one cell is at a different state of charge is one of the most important reasons to do some form of balancing as you found out.
Also, I started, but it seemed on x32 280aH cells it would take a year.
There are some workarounds to make that quicker depending on the equipment that you have. There are a lot of good threads on the subject.
 
The specification sheet for the EVE cell is in Recources.
I'm not sure which of the overlapping conversations you were responding to, but if you were responding to mine, I already have the spec sheet for the EVE 280Ah cells but it only had 2 or 3 of the over 30 adjustable parameters in an SBMS. I go into detail in this separate thread.
 
I am trying to order these batteries from Xuba and am having difficulties in making payment...I completed the appeal so hopefully it will work!
 
I put in my order 4/28, hit holiday shipped 5/6, and still waiting for movement on tracking, last was 5/7 leaving distro center and that's it. I got a fedex label, but that's it, contacted them for more info.
 
update to above, strangely enough FedEx finally updated and it's in my local fedex distro center now, hopefully it'll come in the next couple of days
 
Is there anybody who has received their batteries from Amy that has any documentation that came with the shipment that has is a "Material Safety Data Sheet" My shipping agent requires this document before collecting the shipment.

Has anybody arranged their shipping agent to collect directly from Amy/Xuba electricals ? I'm trying to order 100 + cells but they cant give me an address where I can send my agent to to actually pick up the batteries.
 
Is there a way to get a sticky thread on how to get your CC account approved with alibaba? A step by step process. Amy msg me and said its a problem, and she sent my recommendations to them............but .....I dont think they care. Paypal has made things too easy. I'm more than willing to pay a bit more to use. No idea why they pulled it.
Did you send in the copy of your CC and DL yet ?
 
I did some searching and either I missed it or it wasn't mentioned yet. Those that have victron Battery Monitors, what are you using as your settings ?

I have :

Charged Voltage: 13.8
Discharge Floor 20%
Tail Current 4%
Charged Detection Time 3 minutes
Peukert 1.05
Charge Efficiency Factor 98%
Current Threshold 0.10a
Time to Go 3 minutes
 
Is there a way to get a sticky thread on how to get your CC account approved with alibaba? A step by step process. Amy msg me and said its a problem, and she sent my recommendations to them............but .....I dont think they care. Paypal has made things too easy. I'm more than willing to pay a bit more to use. No idea why they pulled it.

So things may have changed in your case - but I just ordered some more batteries from XUBA last week and paid with zero issues ... I do know the first time I did it both via CC and bank transfer - it got stopped by MY BANK and I had to call them and let them know that I was really me and that I was trying to send money to Amy ... a few minutes later they asked me to try again and it went through ... I see zero reasons on the China side of the house that they would NOT accept your payment UNLESS somehow you/they got the BANK address (routing/acct) number wrong ... but as for Credit Card -- i think none of us are having issues ... WITH that said -- talk to @Craig (american) and he is in literally daily contact with Amy and Xuba .. he is sort of establishing himself as the stateside rep (wrong terminology) but if anyone can help you he can ...
 
So things may have changed in your case - but I just ordered some more batteries from XUBA last week and paid with zero issues ... I do know the first time I did it both via CC and bank transfer - it got stopped by MY BANK and I had to call them and let them know that I was really me and that I was trying to send money to Amy ... a few minutes later they asked me to try again and it went through ... I see zero reasons on the China side of the house that they would NOT accept your payment UNLESS somehow you/they got the BANK address (routing/acct) number wrong ... but as for Credit Card -- i think none of us are having issues ... WITH that said -- talk to @Craig (american) and he is in literally daily contact with Amy and Xuba .. he is sort of establishing himself as the stateside rep (wrong terminology) but if anyone can help you he can ...
Yes I actually talk to these guys often just to be clear though I am not dealing with xuba its another company who deals in EVE cells. They are very responsive though. I have never had any issues with my paypal debit card other than it has a $3000.00 day limit so often times we need to arrange for multiple payments. which works fine.
 
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