That "Robot Check" one is the same as the two I have. It worked for a while then it fried the battery meter on the trolling motor, blew a capacitor. then the motor still worked through the PWM but there was no variable speed on the PWM. I had it wired correctly. Could it be too much amps? These PWMs say 60amp max, but some say 40amp and my 86lb thrust motor is 48amp......