WWZMDiB Constant Current CC CV Buck Converter Module DC 6-40V to 1.2-36V 20A 300W Adjustable Step Down Voltage Regulator Power Supply Module with Short Circuit Protection Function

The WWZMDiB Constant Current Buck Converter has proven to be a good choice for my solar pond aerator application. Its constant current and constant voltage features work seamlessly, ensuring the efficient operation of the aerator. The converter's performance has been consistently good, making it a valuable component for maintaining a healthy and well-aerated pond using solar power. Highly recommended for those in need of a dependable solution for their solar-powered applications.

First one sent to me was erratic and the adjusters did not work. After a few minutes of adjusting it started smoking.Requested a replacement and the replacement works! Feels like a score when you can get questionable to poor electronic quality from you know what country. I'm happy for the price. Expect duds if u can tolerate the hassle of exchanges.

Most people won't know what synchronous rectification means but it's a good thing when it comes to switching power regulators and minimizing energy loss. This seems to work very well barely getting warm when dropping 24 volts down to a couple of volts at a higher output current than the 24 volt input current. The adjustment for current limit is very fine requiring a lot of turns on the trim pot.

Neither the CV nor the CC pots do anything at all, whatsoever. The device also gets almost dangerously hot in only a couple minutes. This thing is utter trash, in my hands. The fact that so many users have this bad experience means that, even at $9 and even though this works for some, you're gambling with your money and your time, and possibly your safety. DO NOT BUY.

I had two of them that work great for voltage adjustment, but the current isn’t there no matter what.I finally got a 3rd on and it works fine. Solar panels to pond aeration is my application.

I'm using this on a solar panel to drop the voltage from 20 volts to 13.5. I am running a power inverter without a battery so this buck converter works well for that application.

It works great for me on my solar project.

For my application it works great. Transformed 4.5v battery lights to wired with this dueweke.Could be a little more solid, it is a little scary to turn the adjustment screws. Some instructions could be nice.Hope it lasts... Ordered 2 more in case!