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

Gazoo said:
Yeah, I agree. I also decided to use some red thread locker on the studs. Was going to use blue but I don't want to worry about the nut turning the stud when I tighten it. Also I got my hardware from Amazon.



I bought 20mm grub screws. Plenty long enough for me.
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You confuse me now. Wasn't it you [maybe I am wrong probably] that said to put some sort of oxide protector on the bolts? And now you say locktite?
I maybe have the wrong person though soooo, apologies ahead of time Gazoo. :)
 
theo886 said:
I highly recommend using stud and locknut no matter what, you ensure you have full thread engagement. You want as much as you can get with these small aluminum threads. Still need to be careful to not tighten too much.
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Speaking as someone who has stripped the threads in his cells, this gets a BIG PLUS ONE from me. :)
 
ghostwriter66 said:
C'mon man ... lightly sand?? ... so we get our batteries ... unpack them ... hit the terminals for a second with a grinding brush on a dewalt cordless drill .... then dip a rag in some gas (yeah we seem to have allot of that available just laying around - LOL), wipe off the terminal -- throw on some homemade copper busbars from plumbing cooper pipes we get at HD - and call it a day -- and it all works perfect .... I actually was starting - or trying - to follow a previous thread of the best cleaner to use on the terminals and on like page 300 i was like - WTH !! -- some of these guys are drinking waaaaaay to much soy milk ... and figured gas would work fine ...
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I'm going to use some industrial/scientific grade 99.5% isopropyl alcohol I have plenty of (thanks, covid). Makes great hand sanitizer mixed with aloe gel, and a few drops of vitamin E oil, but have to order it by the gallon. Yes, my wife works in a lab.
 
SherylinRM said:
You confuse me now. Wasn't it you [maybe I am wrong probably] that said to put some sort of oxide protector on the bolts? And now you say locktite?
I maybe have the wrong person though soooo, apologies ahead of time Gazoo. :)
Click to expand...
My build will be stationary in my apartment so I really don't need to use anything to prevent oxidation. The reason I am using red Loctite is so the stud (grub screw) won't turn when I tighten the nut.

I think you got some great suggestion to prevent oxidation for your build. No need to apologize... :)
 
Gazoo said:
My build will be stationary in my apartment so I really don't need to use anything to prevent oxidation. The reason I am using red Loctite is so the stud (grub screw) won't turn when I tighten the nut.

I think you got some great suggestion to prevent oxidation for your build. No need to apologize... :)
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I did and yes thanks.
Ok I mixed you up with someone else. Sorry about that. :)
 
@Steve_S

With regards to the busbars supplied with the xuba 280Ah cells, i believe they are rated for 300A. In my 24V system they are only going to see a working maximum of 125A continuous(250A peak for a few seconds surge loads) but day to day, much lower values that this. I know we are meant to derate the busbar values for margin of safety, hence folks doubling up, but what is the opinion on the single supplied busbar to handle 125A?
I wouldn't think this should be an issue. Anyone care to put me right?
 
cinergi said:
How big are they? The ones I got are 2mm by 15mm which is like 110 amps
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Yes, mine are the same. Where did you manage to get the spec details showing 110A?
It surprises me, for a 280Ah cell that can discharge 1C , that the single busbar sold, would only be rated for 110A
I thought i had read previously on this forum that they were rated for 300A, but that it would be wise to derate them for a safety margin!
Obviously i would have liked this confirmed, but now you have thrown my assumptions into question. :cry:
Thanks for the feedback.
 
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I believe that in the 280AH xuba cells, the effective thread hole depth is 6mm. The supplied busbars are a tad under 2mm thick. The threaded portion on the M6 screws is 10mm. Thus two busbars can be utilised perfectly with the existing screws. If attaching a balance lead, this can be done by drilling an appropriate hole in the two busbars(prior to placement i might add) and addition of another screw, specifically to hold the BMS/balance lead. This allows for full thread utilisation by the existing screws. Would it be worthwhile adding a dot of loctite at the busbar expansion slot to bond the screw to the busbars/terminal, after being treated by noalox?
 
I hate to do this to you guys as you seem nice. BUT....
DC runs hotter than AC.
So I double up my busbars anyhow. :)
EDIT: That pdf chart was for 60hz AC. :)
 
Update to delivery time (sea shipping to USA):
Ordered from Xuba 2020-09-24
Amy sent me photographs 2020-09-28 (and said they were shipped that day)
Amy sent me tracking information 2020-10-05
Fedex says they are out for delivery today! 2020-10-29

FYI, I ordered 16 cells (280AH) and it was USD 1670.72 including shipping (plus whatever the Alibaba credit card fee was, I forget)
 

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Just John said:
Update to delivery time (sea shipping to USA):
Ordered from Xuba 2020-09-24
Amy sent me photographs 2020-09-28 (and said they were shipped that day)
Amy sent me tracking information 2020-10-05
Fedex says they are out for delivery today! 2020-10-29

FYI, I ordered 16 cells (280AH) and it was USD 1670.72 including shipping (plus whatever the Alibaba credit card fee was, I forget)
Click to expand...
Happy days :)
{Does the happy dance for John] :)
Feels pretty good doesn't it. :)
 
Okay, first post to this forum ever, hopefully I'm not hijacking this post.

I'm new to lifepo4. I've got x4 280ah cells from the same manufacturer as mentioned in this post; genfangbattery.com/products_en.html
I discovered the manufacturer via the QR codes, however the codes do not take me to any specific product information, just the website.

I have gathered supplies for combining my cells into a single 12v battery, but am doing more research on them before I actually hook them up or start using them.

I have a few bits of confusion I thought someone could help with;

- Does having a properly programmed MPPT charge controller negate the need for a BMS? If not, why? I haven't read anything about this so far one way or another.

- Also, I can't find battery specs on the manufacturer's website (listed above) as a guide for how these batteries should specifically be programmed. The videos and pages I've read through so far says to get exact specs from the manufacturer for programming. Since these are the same as what others on this post have purchased, are the specs you have applicable to my cells?

- Do cells need any spacing from one another; is it better to pack them tightly or to give them space from one another? I haven't been able to find any info on this either. Most of the images I see they are tightly packed shoulder to shoulder but I wasn't sure if there might be temperature-related benefits to spacing them apart in their housing.

Thanks :)
 
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Pincones said:
Okay, first post to this forum ever, hopefully I'm not hijacking this post.

I'm new to lifepo4. I've got x4 280ah cells from the same manufacturer as mentioned in this post; genfangbattery.com/products_en.html
I discovered the manufacturer via the QR codes, however the codes do not take me to any specific product information, just the website.

I have gathered supplies for combining my cells into a single 12v battery, but am doing more research on them before I actually hook them up or start using them.

I have a few bits of confusion I thought someone could help with;

- Does having a properly programmed MPPT charge controller negate the need for a BMS? If not, why? I haven't read anything about this so far one way or another.

- Also, I can't find battery specs on the manufacturer's website (listed above) as a guide for how these batteries should specifically be programmed. The videos and pages I've read through so far says to get exact specs from the manufacturer for programming. Since these are the same as what others on this post have purchased, are the specs you have applicable to my cells?

Thanks :)
Click to expand...

BMS is there to keep the batteries from discharging to low or charging too much ... MPPT is there to charge the batteries ... totally different things ...

going to say - that generally - all the specs are virtually the same or close to it if you get the same type/size/weight battery as the specs that you can find ... honestly its to the point where i actually believe that there is only one old Chinese man making all these batteries in his garage and everyone is buying them and changing up the QR codes ...
 
ghostwriter66 said:
Totally away from my batteries and notes ... for a 280ah 3.2 EVE what size terminal bolts and locknuts do it need? I thought it was M8 but not sure ,,, Completely brain dead - work with tooo many batteries ...
Click to expand...
From the Eve Spec Sheet it says
Remark: The pole is a double aluminum pole structure. The internal screw with size M6 is used in the
poles.
Click to expand...
 
Just John said:
Update to delivery time (sea shipping to USA):
Ordered from Xuba 2020-09-24
Amy sent me photographs 2020-09-28 (and said they were shipped that day)
Amy sent me tracking information 2020-10-05
Fedex says they are out for delivery today! 2020-10-29

FYI, I ordered 16 cells (280AH) and it was USD 1670.72 including shipping (plus whatever the Alibaba credit card fee was, I forget)
Click to expand...
Man around 13 kilowatts for 2 grand if you run 24 volts with two overkill solar BMS's. or 11,000$ for battleborns plus the fun of the build. These are good times
 
Pincones said:
- Do cells need any spacing from one another; is it better to pack them tightly or to give them space from one another? I haven't been able to find any info on this either. Most of the images I see they are tightly packed shoulder to shoulder but I wasn't sure if there might be temperature-related benefits to spacing them apart in their housing.

Thanks :)
Click to expand...
Welcome. :)
Not sure if these will help or hinder.
But it has been discussed here.
https://diysolarforum.com/threads/threaded-rod-cell-strapping-and-assembly.10519/

https://diysolarforum.com/threads/e...e-clamped-tight-or-spaced-for-expansion.7892/

Personally I think it has been done to death. Mostly just tighten them up when depleted and leave them alone afterwards.
I hope this helps. :)
 
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