QSMOTOR E-Bike QSYKZ7280J Controller 42V-72V 80A 1000-2000w Square Wave Brushless Motor Controller for Electric Tricycle

Cheap crap. You get what you pay for. Can't even connect to the app. My phone shows the Bluetooth device. But the app can't find it.. Half baked technology here!

Compre 5 de estas cajas reguladoras llegaron perfectamente bien y funcionaron excelenteSolo pienso que deberían agregarle un manual de instalación o quizás tener en internet videos de cómo programar por BluetoothExacto esto lo recomiendo 100%

This is just what I needed and it works great and would like to have another one for on hand. Please put these back on Amazon

So I paired one of these controllers with a QS 205 V1 motor on an Ebike. The nice thing about this beefy controller, is that you can buy it and program it down to a lower power battery or motor, then when you want to get faster, you can up the juice.This controller has a bluetooth module with a really useful app where you can set your parameters. The app is called "emotor" and you can find a youtube video explaining how all the functions work. Useful features are, setting how much power the controller draws, setting low volt cut off at whatever level you want, speed limiter (for when a friend tries it), a speedo gauge, an odometer, and a remote wheel lock.I use (3) 6s lipos hooked up in series to create a 16 amp hour pack at 75.5v fully charged (18s times 4.2). Batteries I have are rated for 10c continuous, but realistically the voltage sag is best countered when using 4c continuous. So 16x4=64 amps. Because I don't need full speed, I set my normal amp draw at 75%. This gives me a top speed of around 37mph on a very heavy steel frame bobber bike. I also get around 18 miles on that 16 ah pack.The controller hooks up very easy to the QS motor. I quickly got the wheel onto my bike (with 150mm dropouts, even though QS says only for 135mm) and got the few wires plugged in. All connections have matching connectors/colors so hooking up is easy. You basically just have to hook up a hall sensor plug and power lines from the controller to motor, then you have a cut-off switch plug into controller, a 3 speed switch into controller, then an ignition/throttle unit that also plugs into the controller then. Turn the key and you're off.This unit does seem to be slightly lacking in pedal assist options. I hooked up a non torque type pedal assist sensor, and as is typical, you get full boost when you start to turn the pedals. This is a flaw of all non torque PAS devices, but it would have been nice to see some adjustability options for PAS in this controllers menu. So far so good. I will update this review if I have either of my two controllers burn out (seems very unlikely), I am happy so far.