We both have iPhones, Kindles ,and several other portable electronic items that can be charged via a 5vdc USB cable. Since we dry camp a lot, we found that there wasn't always time during generator hours to charge our stuff. (Murphy's law says that the iPhone needs a charge after generator hours.)
So I hunted around and found a nifty UBS charging port that is designed to be panel mounted and runs off 12vdc. It's made by Blue Sea which is one of the most respected names in marine electrical hardware. It comes with a waterproof cap as it is designed to be installed on the exposed dash panel of boats with open cockpits so you could install it on the outside of an RV with no problems.
Here's the unit and one source for it:
http://www.ebay.com/itm/Blue-Sea-Dua...-/150833744974
I found a blank area on the front of the entertainment center next to the Jensen radio/DVD unit, drilled the hole and tapped into the hot and ground lines feeding the Jensen. I also added a toggle switch on the +12vdc side so that I can turn the unit off when not in use. It draws current continuously, even when not in use, so I did not want it pulling juice if not needed.
Blue Sea also makes a 12vdc accessory socket which can be used for chargers and such that use a regular cigarette lighter adapter plug. This would be a good item to also install alongside the USB charger socket. I already had a pair of Sea Choice sockets installed so I didn't get the Blue Sea one for this application.
http://www.ebay.com/itm/Blue-Sea-Sys...-/140750366860
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