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.
Performs as advertised, bluetooth and app work fine. Not sure how much I actually need it, as the controller in my camper is easy to see & I probably won't look at the phone app all that much.
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.