24V to 12V 5A 60W Converter, Step Down Transformer, DC 24V to 12V Step Down Converter DC to DC Converter Voltage Reducer Regulator Buck Waterproof (Accept DC 15~40 V Inputs)

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Was a cheap buy..never worked..didnt bother to return

I put it inside my wall in a Levi ton Structured Media cabinet with a mirror on a hidden hinge covering the opening. It provides power to my cable modem, three (remote} router pod thingies, two 8-channel Ethernet switches, the smart controller for my Navien Tankless Water Heater, my caseta hub, and the gateway for my Ecowitt weather station. That normally totals less than 4 amperes. I chose a 10 amp converter to have a large guard and I chose this one because it doesn't have a bulky, attached, heat sink. It has been running fine for a month. The cabinet also includes two 48V NVRs with spinning hard disks, with the power supply is outside the cabinet. I have a thermometer inside the cabinet that says the air is 94°F even though that in the room is just 74°F. I used an infrared thermometer to check the temperature of this converter: 104°F.

Tried using other 36V to usb 5V converters to charge iPhones. None work with iPhones. iPhone stops charging within a minute so I bought this 12V adapter so I can use common 12 volt car usb adapters that plug into cigarette sockets that work with iPhones. Now I can charge iPhones directly from ebike batteries. Works great!

Works great for powering two 12V fans from a 48V battery system. I was a little surprised by a small spark when connecting it up, it must have a fairly significant input capacitor. In anycase, the fans eat 0.4A @ 12V and the converter doesn't even get warm. I wound up putting a small inline resistor on the input to make the solid state switch driving it happy.