LiFePO4 Battery Management Systems (BMS)

 If you want to know how to build your own battery, check out this page: Click Here
If you need raw LiFePO4 Cells: Click Here
​(I make a commission for purchases made through the links below)

Overkill Solar 12v 4S 120A BMS w/ Low temp Charging Protection!!

I have been testing BMS for over a  year and many of them failed/were hard or impossible to program/heated up excessively etc. 

Then I found this BMS. It is used in medical devices and it's top quality. I tested the low temp charging protection, over current protection and voltage cut offs and it passed all of my tests.

What you need to know when using it:
  1. 1. Overkill Solar hosts the most recent app versions on the downloads page. Android users need to download the .apk file and allow 3rd party apps to install. 

    2. The standard 10ga wires get hot under constant load, so overkill solar offers it customized with 8ga wires, or with no wires in case you want to solder them yourself.
And that's pretty much it. You will love it. It connects to the bluetooth instantly and its easy to program how you wish. 

Click here to buy from Overkill Solar (American distributor with customer support)

​​And below is the APK file (to install on your android device) so you can program the low temp cut off settings:

Version 2 firmware:

android_app_xiaoxiangbms_3.1.1015.apk
File Size: 5808 kb
File Type: apk
Download File

Overkill Solar 24V 8S 100A BMS w/ low temp charging protection

Same BMS as above, but in an 8S 24V configuration! We have been waiting ages for this, and it is finally available.

Click here to purchase now

Overkill Solar 48V 16S 100A BMS W/low temp charging Protection

Finally here! Use this BMS to build a powerful 48V system.

Max output of 4,800W!! (48V X 100A) This BMS can handle a serious amount of power.

Click Here to purchase now

Low Quality and Cheap Daly BMS (No Low Temp cut off, but easy to install)

These work great as a bms, but your charging sources need a low temp cut off.

This is still my go-to BMS for quick projects. I don't care for data logging or changing settings on my BMS, so the Daly works great. I am running them in parallel in my shed at the moment without an issue. Very simple and works well!

Some people do have problems with them. The new "smart" version seems to die easily. I would stick to the overkill BMS above. 

To activate a daly BMS, you must short out the P- and B- terminals. That will "wake it up". 

​Click Here for a 12v, 100A Daly BMS

Click here for a 12V, 250A Daly BMS

Click Here for a 24v, 80-100A Daly BMS

Click Here for 48v, 80-200A Daly BMS