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
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1,000 Amp Max Terminal Block$79.95 – $159.90 -
4s BMS 120a LifePo4 with 24″ 8ga Wires$158.54 -
Industrial LiFePo4 Cell – 100ah 3.2v – 200 Amp Discharge Rating$128.14