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.

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

How To Wire It Up (Click Here For A PDF Manual)

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

How to wire it up (click here for a PDF manual)

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

How To Wire It Up (Click Here For A PDF Manual)

REC BMS: Advanced User BMS w/ Communication

It is expensive, but it can do everything. I do not recommend this BMS for beginners. But if you are building the best of the best battery, look no further:
​
  • Programmable to work with 5s through 16s LiFePO4 Battery Packs
  • Compatible with Li-PO, LiFePO4, LiFeYPO4, LiCoO2, LiMnNiCo and LiMnO4 Lithium-Ion chemistry
  • Compatible with Wakespeed WS500
  • 0.1 – 5.0 V measuring range, 1 mV resolution, 2mv accuracy
  • Up to 8 digital temperature sensors
  • Shunt current measurement, can utilize a separate shunt, or “piggy-back” an existing system shunt such as the Victron SmartShunt or equivalent
  • SOC and SOH calculation
  • Internal passive battery balancer with 4.1 Ω power resistor
  • Single cell internal resistance measurement
  • Single cell – under/over voltage protection
  • Up to 3 temperature sensors
  • ISO16315, ISO10133, EN61558-1, EN61558-2 and EN50498 compliant


Click Here to Purchase