User manual: Click here to download the manual (PDF)
3D model: click and drag to rotate, or download the STEP file.
BMS For 8 cell, 24v volt Lithium-iron-phosphate DIY batteries.
100 amp continuous charge or discharge current.
Low Temperature Charging cutoff at -1c.
The Apps allow you to monitor SOC (state of charge), Current, Voltage, cell balance, temperature, and more.
This unit has a connection for a remote shutoff switch. Useful for storage or security.
Bluetooth Module is included, Balance wires are included, USB module is an additional purchase.
Final assembly, testing and calibration is done in Naples, Florida. Units with 8 gauge wires and/or crimped lugs are assembled in Naples, FL. The BMS is manufactured in China.
Example of a complete 8 cell battery with BMS:
To view or change Parameters, there are 3 ways to connect to the BMS.
1. Bluetooth module to IOS app. IOS app is on the Apple app store. Overkill Solar Mobile App
2. Bluetooth module to free Android app. (download this version, don’t get it from the play store)
3. USB module to PC/desktop application. This application is free
A great resource for general DIY power education is www.Mobile-Solarpower.com
FYI for experimenters: The BMS communicates with a 5v TTL UART at 9600 baud. It is directly compatible with Arduinos, etc.
We have written a new Arduino library for the BMSs, now available on the downloads page. The beta version allows you to read all the monitoring parameters and switch charge and discharge on/off. Future releases will have full read/write capability. A python library is also in the works.