LIFEPO4 Battery discussion thread

DTBA said:
Took a chance on this https://www.bobshop.co.za/sunnew-sn...fepo4-wall-mount-inverter-battery/p/636132856
View attachment 1920051View attachment 1920052View attachment 1920053View attachment 1920054
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Was hoping for a pacebms but no luck.
Click to expand...
Soo its reading .10v higher on the battery bank then any of the other bank. Also its pulling the lowest amps charging and discharging .

I Don't have multimeter good enough or DC amp meter to say if the bms is out.

It has the longest cables in the bank but when charging it always have higher voltage same discharging,

Also amps is lowest while charging and discharging.

I would have said its the small silicone cable inside but even at idle the BMS is showing 0.10v more then the full bank.

Might be a good idea to replace the BMS with a JK and the cables inside as well.





If I had multimeter good enough then I could double check it.


Some day if I have installed more batteries ill take this one out.



For now stay away from it.
 
DTBA said:
Soo its reading .10v higher on the battery bank then any of the other bank. Also its pulling the lowest amps charging and discharging .

I Don't have multimeter good enough or DC amp meter to say if the bms is out.

It has the longest cables in the bank but when charging it always have higher voltage same discharging,

Also amps is lowest while charging and discharging.

I would have said its the small silicone cable inside but even at idle the BMS is showing 0.10v more then the full bank.

Might be a good idea to replace the BMS with a JK and the cables inside as well.





If I had multimeter good enough then I could double check it.


Some day if I have installed more batteries ill take this one out.



For now stay away from it.
Click to expand...
I guess you never get 2 battery's with identical internal resistance. I'm not concerned about this, they should all even out in the end. Also, crimps and lugs make a huge difference as shown in Will's latest videos.
 
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