Extremely easy to install and use. The app is okay. There are actually 2 apps that I found. I like the long cord to allow for installation where I need it for a better signal.
This device works great to interface wirelessly with the Renogy or similar ML2240 clones out there. The app is ok, could be better, but it does work giving you access to the device and the ability to modify and monitor the MPPT controller.
I don't always get out to my boat but this ties to a monitor that I have there and can now check on my batteries and charging when I am not there. It's great
This is a nice addition to the Renogy solar system at a reasonable price. It allows monitoring or configuring of the charging system via your smartphone or tablet. It's easy to use, you just open it and specify the desired bluetooth device. My only real complaint is that you have to specify it each time you exit the app.
I love having the Bt-1 module! I would like to see a better description of what each of the parameters mean. I have it set for Li battery, randomly it will switch to “user” and drop my pre set numbers. Since my other controllers are set to 13.8 float and storage voltage, the default 14.4v seems too high……not sure I need to be worried about that? I’m using 1 Battleborn 100 ah battery.