Features:

  • This version Includes a Bluetooth communication module.
  • BMS For 4 cell, 12v volt Lithium-iron-phosphate DIY batteries
  • 120 amp continuous charge or discharge current
  • Low Temperature Charging cutoff at -1c
  • Fully programmable with IOS app, Android app, or Desktop app
Great customer service/BMS works

BMS is working so far. Some observations. I had some issues at first with the Android App but was able to resolve. First, make sure your GPS is enabled on your phone. For some reason my phone would not recognize the BMS in the app with Bluetooth with my GPS turned off. Second, when charging the batteries the BMS will not show instantly the state of battery charge and amps being delivered. It make take 10 second or so to get an update via Bluetooth. When no current is going in our out of the batteries the BMS updates nearly real time. The seller Overkill Solar has great customer service and will respond very quickly to your questions. He also has some YouTube videos on upgrading the 10g wire to 8g. So far I am happy with this purchase and expect to do additional business with this seller.

Best DIY BMS I have found

This is the best DIY BMS for 4s (12v) LiFePo4 battery management system I have found. The manufacture, and pre-soldered leads make it versatile and easy to install. I find the bluetooth connection, app, setting and information gained by using it exceptionally valuable. In my case, I replaced a different brand (non-bluetooth) BMS that failed due to over discharge (even though rated for 100 Amps and only under a 60 Amp load). The cells were slightly imbalanced and this BMS re-balanced them and the battery is functioning perfectly. I heartily recommend this BMS for you 12v LiFeP04 battery build.

Working well so far.

Finally received batteries and hooked up last night and everything working well so far with light load. Latest Android app (v3.1) from github gives lots of good info on state of cells and history.

Overkill Solar Rocks

Great job on packaging. It came with a diagram on how to connect it and a cool drink thing. Iā€™m very excited to connect it all up. Great experience with Overkill Solar!

This BMS performs flawlessly

I purchased (4) of these from " Overkill Solar "for the 4 - 280 ah LifeP04 batteries I put together, I use them in a motorhome for the inverter/charger which can require 400 - 450 amp draw. They have worked flawlessly, the Bluetooth modual makes it easy to program and to view the state on all 4 batteries. Shipping was prompt and very good instructions were included. I can recommend" Overkill Solar " without question! šŸ‘

Heavy duty and easy

Appeared to be better built with heavier cable and components than other units I've seen. Bluetooth app worked immediately.

Best customer service

Excellent product!! But what is even better than a great product is the BEST customer service I have gotten for anything I have bought. Thank you

Excellent

Finally getting the full potential out of my battery.

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