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GaryS1953's avatar
GaryS1953
Explorer II
Apr 07, 2018

Exterior 12 volt outlet

Hi Everyone- I want to install a 12 volt outlet on the exterior of our camper. I would like just a single port with a bracket to mount on the underside of the 5th wheel overhang, so it needs to be weatherproof. The ones I’ve found so far seem relatively low amperage. I will connect it directly to the battery and shunt with appropriate fusing. I’m going to be using it to power a 12 volt inflater for bike tires and an inflatable kayak and so on. Can anyone recommend an appropriate outlet? Thanks!

19 Replies

  • To keep it out of the weather I would consider installing it just inside the front compartment or storage compartment on curb side. Thats what I have done for a cigarette plug and some usb plugs.

    Daryll
  • The Atwood looks decent enough for intermittent use. I'd be concerned about the pressure fit cap holding against road debris or driven water while driving, time will tell.

    I thought I saw one with a screw on cap, but I'm not finding it.
  • The ciggy plugs that come on most appliances are quite poor.

    Seems the blue seas 12v receptacle design has been well copied. I'd still not ask them to pass more than 4 to 5 amps on a continuous basis.

    Try pulling out the plug after passing 5 amps for a minute. When that spring loaded nipple tip starts getting hot, and it will, think about having a backup ready to install.

    The blue seas plug is a fairly good design, and one can get 12AWG under the screws inside the plug, but might have to modify( drill out) the tailcap to allow 2 12AWG wires to exit.

    I've switched to Anderson powerpoles for all 12v connections. not as convenient and no internal fuse, but I can trust them, and not worry about horrendous voltage drop and inevitable failure.
  • GordonThree and RoyB, I found an Atwood Marine unit on Amazon that gets great reviews. Comes with 10 gage wire and connectors, a closable cover and a rear boot, as well as a mounting bracket. Perfect I think for my needs. Thanks for your suggestions.

    Dick_B - this is strictly for boondocking so no 120 connectoon. I only have a very small inverter for our TV, so I have a 12 volt inflater. Thanks for your thoughts.
  • I bought this one for our TT. It's well made with decent size wires and water tight. Link
  • Just slightly off topic but I use a small compressor to pump up our bike tires that plugs into the 120V outlet on the outside of the trailer. It's a Campbell Hausfield 4100 for around $40 at various locations. You could also use it to top off the RV tires in a pinch.
  • RoyB's avatar
    RoyB
    Explorer II
    I think your best results would be to get a BLUE SEA or WEST MARINE type matching 12VDC PLUG/SOCKET that is used in boat and marine units... ETRAILER should have something like this as well...

    I have tried other brands from autoparts stores and they always over heat on me when I try to pull 4-5AMPS DC current through them

    Using a matching 12V PLUG will give you the best results...

    Something like this from AMAZON should work just fine for you... Be sure to use at least #12 wiring or higher rating...



    Roy Ken
  • Probably something intended for a boat, motorcycle or atv?

    Have you looked at Blue Sea products?

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