Back feeding 110V system from 750 watt inverter

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  • Mrgolfer0
    Junior Member
    • Apr 2015
    • 8

    #1

    Back feeding 110V system from 750 watt inverter

    On my trailer I've 2 solar panels (235w each) for charging 2-12 volt batteries. I am hooking a small inverter to the batteries, and wonder if I can back feed into the 110v receptacle system without disconnecting the 12 volt solar breaker? There is not an active external 110v hookup.

    Thank you
  • Naptown
    Solar Fanatic
    • Feb 2011
    • 6880

    #2
    I don't see a problem with that as long as you don't plug into shore power at the same time. make the connection isolated and foolproof.
    NABCEP certified Technical Sales Professional

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    • Mrgolfer0
      Junior Member
      • Apr 2015
      • 8

      #3
      Back feeding 110V system from 750 watt inverter

      Thanks Rich, you confirmed what I was thinking. Jay

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      • SunEagle
        Super Moderator
        • Oct 2012
        • 15162

        #4
        It would be safer if you just used a properly size wire extension cord from the inverter to whatever you want to run at 110volts.

        Anytime you back feed a panel through a receptacle, unless all other sources of power are disambled you run the risk of putting too many amps on the circuit wire.

        What is the normal power source for that 110volt receptacle and can it be physically isolated?

        Comment

        • Mrgolfer0
          Junior Member
          • Apr 2015
          • 8

          #5
          Back feeding 110V system from 750 watt inverter

          Originally posted by SunEagle
          It would be safer if you just used a properly size wire extension cord from the inverter to whatever you want to run at 110volts.

          Anytime you back feed a panel through a receptacle, unless all other sources of power are disambled you run the risk of putting too many amps on the circuit wire.

          What is the normal power source for that 110volt receptacle and can it be physically isolated?
          Thanks for the info.

          Good point on extension cord. The inverter is small, 750 watts or 7 amps on a 20 amp 110v circuit. Nothing biggie just looking to charge electronic equipment (couple of amps) and being a little more convenient from a receptacle than extension cord for the lady of the trailer.

          Comment

          • Tony123
            Junior Member
            • Aug 2013
            • 11

            #6
            I have done the same on my camper. you will want to disconnect the campers battery charger otherwise it will try to recharge the batteries with the batteries used for the inverter (same batteries). I also installed a grounding rod and connected my inverter/ charge controller to it. If your camper is like mine it uses the ground from the source it is plugged into. Also instead of back feeding into a receptacle just use the main camper cord and plug it into the inverter.

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