Support/Downloads

User Manual

User Manual: Download Manual (6.5mb PDF)


Simplified 4 Cell Assembly

Ultra simple view of a complete 4 cell battery assembly.
– Click for full resolution.


Bluetooth Mobile Apps

iPhone App: Overkill Solar Mobile App

Android App: Overkill Solar Mobile App

Brand new OFFICIAL apps now on the Google play store and Apple App store!

Old Android App:

Android_app_xiaoxiangBMS_3.1.1026.apk

Download and install the APK, Allow 3rd party apps to install.

Desktop App with password reset tool:

Overkill-Solar-bms-tools for Windows

(Download latest release package, unzip and run)

(JBD Chinese version) Desktop App:

JBDTools V2.9-20210524

(unzip and run)

Backup parameter files for desktop apps: BMS_parameter_files.zip

Hacker Tools

Communication Protocol Documentation

Arduino library: Version 2 (read/write)

Other Instruction Sheets

Detailed Instructions, 8 cell 24v battery with BMS. PDF

4 cell 12v Wiring Diagram & settings PDF

8 cell 24v Wiring Diagram & settings PDF

16 cell 48v Wiring diagram & settings PDF

Forums:

DiySolarForum.com

Reddit.com/r/OverkillSolarBMS

Educational:

https://www.mobile-solarpower.com/

DIY Solar Power with Will Prowse (youtube channel)

About Cell Balancing

Overkill Videos:

YES, these are all terrible. I’m not “a youtuber”. One thing at a time.

Read BMS parameters on an iPhone

Do bigger wires make a difference?

A tool to solder 8ga BMS wires

Tech Support, etc:

For troubleshooting help , please include a screenshot and clear photos of your battery. 9 out of 10 problems are an incorrect setting or an incorrect connection.

Support@OverkillSolar.com