I'm confused; the LED strip is already 12vdc, as is the wiring in your trailer. Why use a 120vac-12vdc power supply? That means you can only use the strip with generator or hookups. When I installed my awning strip LEDs, one of the main points was to use them without genset/hookups. I installed the strip on the roller, and plug in a wire that then runs down the awning arm/leg. From there, it drops under the MH where I ran a short 12vdc line and a plug; out of sight and out of mind. Again, just curious as to why the 120vac power supply?