Review on Efficient XINCOL 15A 180W Truck Car Power Supply: DC 24V to 12V Buck Converter with Full Protections, Memory Line & Inline Fuse by Bryan White

First, the wires are very short for work. 5 inches. Assuming you're going to integrate it into some sort of battery system that doesn't offer a lot of workspace without soldering your own wires. Mine initially worked and showed 12.5V output, but when I went to check everything with the inverter, the LED went out and the voltage dropped to 0. The fans are still running. I checked all the cable connections and the tester said they were fine, but I basically spent $50 on them. I would recommend going the other way.