PWM DC Motor Speed Controller, DC 10-55V / Rated 40A, LED Display Stepless DC Motor Speed Controller with Adjustable Potentiometer and Forward-Brake-Reverse Switch

Works good, i using it for a trolling motor,

We have purchased three different DC controllers for this project. The first two were from China and rated at 30 amps. They both got very hot and failed at 10 amps. We subseuently purchased this controller, which was more sophisticated and had nice remote controls and a speed or percent power indicator. This one is rated at 40 amps, whereas our application required 12 amps, so we intended to run it at about 30% or rated output. At 12 amps, this one also got hot but didnot burn out. We reduced the running amperage to 10 amps and the device did not reach a failure temperature level. We will build this unit into our product but reduce the rating to maximum of 15 amps rather than the published 40 amps. The controls and indicator are very well done.

The product died right away, despite being rated for 60A. Wrong. Carefully attached the unit to a small 12V power supply and a small motor (max draw 5A at stall). Double-checked all polarities before final connection. Turned on the main switch, then the potentiometer, and -- zilch. Nothing. Nada. Checking the unit with a multimeter, it is clear that the switches all work, but something on the board is hosed. My schedule is now kaput. I really want my money back, or a working unit. Disappointed.

First one failed within a week. Returned it for a replacement and second one is working great after 3 months of daily use. Switching frequency seems to be around 20kHz, at least that's what my meter is picking up. The display does not display voltage. I believe it is displaying duty cycle, or percent of output capability. I attempted to solve that mystery but my meter that reads duty cycle is at work and I can't ever seem to remember to bring it home. The pot is a somewhat sensitive, I wish it had a 10 turn pot. I will likely be adding one soon. The lack of a cooling fan was troublesome, in hot conditions it does tend to warm up quickly but has not shut down to overheating, I just zip tied a 12v computer fan to the top, problem solved. If you're working with low circuit resistance, or you need exact power output, similar to a bench top power supply, you may have issues using this. Let me explain: It is not able to adjust between percentages and has no individual volt/amp limiting adjustments. I am attempting to adjust to a certain wattage but have to settle for slightly above or below desired, then wait for the circuit to warm up as I am only able to set it to 19% or 20%, not 19.5% or 19.3% which would be more desirable. I subtracted one star for the first one failing but it was really no trouble getting it replaced. It has worked well for my use, just a few minor tweaks and it will be ideal for my use.

I’m not one to write a review unless something is actually really special and worth my time. StructoMax Meets that criteria. You will not find a better electrical box, I don’t care how much you spend. And how low their boxes are priced is outrageously low for what you get. I bought a 12x16x8 and I’m blown away with the quality and craftsmanship of this box. Wayyyyy beyond what I imagined I would get and I didn’t have low expectations. It’s heavy, actually heavy with .175mm thick steel and a great powder coating. The door has a good gasket and when it closes the fitment is solid. I’m ordering another one just to have before people realize how great these are and the demand goes up as well as the prices. StructoMax, you made a fan here out of an over the top OCD perfectionist. Well done.

Simple forward and reverse motor control. I found the rocker switch was not suitable for my needs so changed to two separate momentary push button switches. I didn’t use the ‘turns digital readout’ as it’s not got a ‘retained’ memory, it goes to zero if switched on or off. So I didn’t know where I was in rotation terms.

I was really impressed with this item! It came with connectors and a couple little extras. After about 10 mins of setup, not only did it look slick, but, it functions EXACTLY as described! Just what I needed for my highbanker pump! For anyone here doing the a similar project: - (x1) Harmnee Controller - (x1) Prospector's Dream Bac-Pac series highbanker. - (x1) 2,000 gph bilge pump - (x1) 12v 20ah Dakota Lithium battery - Misc. roll of 16ga wire. I've run it in the bath tub for over an hour, at all different speeds. Haven't had a single hiccup! Taking it to the woods in two days for real world testing but, I imagine everything will be great!

Product worked perfectly running a 46lb trolling motor intermittently. The problem arose when trying to use it continuously. The trolling motor draws 48 amps at full power which was verified using a shunt. The relay unsoldered itself after approx 20 minutes at 48 amps. The controller was mounted in fresh air with no fan. Maybe if it was fan cooled it could handle the full 60 amps.

These are so much cheaper than expected and works just like the expensive ones.

Works well on the electric troll motor.