I spent time earlier this week modifying an old ATX style PC power supply for use in my teardrop.

It will be used when we are connected to shore power and outputs 14amps at 12Volts. This is more then enough to handle our 12 volt lights and the radio. The wires wrapped around the supply will be routed to the Power Supply ON/OFF switch on the Power Control Panel.
Making my 12 Volt Power Supply