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  1. #1
    Big Traveler
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    UBS ports, 12v or 110?

    I know, I could take it apart and figure it out, but I'm not at the trailer and wanted to get a quick answer. Are the USB ports on a 351M powered by 12V or 110? IE, do they have power when not connected to shore power/generator?

    Thank you!

  2. #2
    Big Traveler
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    Looks like it's 12V, but still not 100% sure. The reason I'm asking, I put an IP camera in the bedroom and am looking for an "always on" source of power that's available with/without a generator running. So if the USB ports power off 12V they will work for what I need, if not, well, I'll have to keep looking.

    https://www.granddesignrv.com/owner-...s/detail/47271

  3. #3
    Site Sponsor Richter's Avatar
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    Maybe I’m missing something, but could you hook something up to the USB with shore power hooked up, ensure that it is working, then unhook the shore power, so that you only have battery? If it still works, then it’s hooked to 12V.
    Tom and Janice (known as Tom in PGH on the “other” forum)

    First came the 18' Comfort bumper-pull, was great for 20 years.
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  4. #4
    Big Traveler
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    Nope, you're not missing anything, it's just raining and I don't feel like going out to the rig, pulling the shore power, and testing it. Figured someone might know, and, if so, it might be helpful to others looking for an always on source of USB power.

  5. #5
    Site Team WhittleBurner's Avatar
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    Do you have a volt meter that would tell you.
    Marcy & Gary
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  6. #6
    Big Traveler
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    Quote Originally Posted by WhittleBurner View Post
    Do you have a volt meter that would tell you.
    Yeah, I do. Honestly though, probably easier to just shut down the shore power and see what happens. My rig has the gas/electric fridge, which, as I understand it, means no inverter. So if it stays on with shore power disconnected and genny off, well, there's my answer. It's just raining cats and dogs right now and I figured maybe someone already investigated and knew the answer.

  7. #7
    Site Sponsor
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    we boondock all the time. The USBs are hot in the kitchen and bedroom above the pillows. Seems they are direct 12V ports with the USB chip to reduce voltage and current.

    Reflection 150 295RL
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  8. #8
    Big Traveler boyscout's Avatar
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    Quote Originally Posted by Overtaxed View Post
    I put an IP camera in the bedroom
    Hmmmm.
    Mark - 2018 Solitude 310GK - 2017 F-350 diesel SRW short box - Pullrite Superglide hitch

  9. #9
    Site Sponsor Cahriad's Avatar
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    Mine are all 12v. When I needed 12v for my Cpap I tied into the line supplying the USB ports above the bed.
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  10. #10
    Setting Up Camp chadskidmore's Avatar
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    On my 2020 349M they are all fed from the 12V supply. I am sure that they are turned off however if the main battery switch is turned off.
    2020 Momentum 349M
    2016 Ram 3500 SRW with AISIN tranny

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