Forum Discussion

Ro646a's avatar
Ro646a
Explorer II
Apr 01, 2018

No AC power when connected to shore power.

I didn't realize that I originally had this posted in the wrong forum and the topic was closed. Sorry.

I have had our motorhome plugged into shore
power in my driveway, as always, but this morning I went out there and my house batteries were dead and there is no 110 volt power to any of the outlets.
I started the generator, and the batteries are charging and all the 12 volt times are working, as well as the 110 volt heat pump, but there is no power to any of the 110 volt outlets.
I have it plugged into a standard 220 volt 50 amp, grounded outlet, and I have confirmed that I have power going into the shore power cord.

Any thoughts as what I should check next?

Thanks

Thanks for the input that I did receive. So far I have already checked all the connections in my house and the outlet to the shore power connection. The problem definitely is in the motorhome.

I have checked the reset on the converter/inverter, and all the breakers. I suspect that the converter has gone bad.
Class A

16 Replies

Show More
  • tropical36's avatar
    tropical36
    Explorer
    Apr 01, 2018
    Ro646a wrote:
    I think it must be something with the transfer switch. Easter visitors arriving now so I'll have to wait until tomorrow. Thanks for the help.

    If your shore power cord has a connector on the coach end, always check that first. They are usually a twist-loc type, with a locking ring and will work loose on occasion. Remove it completely and inspect the pins for burning and such, while you're at it.
  • Ro646a's avatar
    Ro646a
    Explorer II
    Apr 01, 2018
    I think it must be something with the transfer switch. Easter visitors arriving now so I'll have to wait until tomorrow. Thanks for the help.
  • wolfe10's avatar
    wolfe10
    Explorer
    Apr 01, 2018
    If nothing on the coach works on 120 VAC (like the roof A/C) then start by checking for power IN and OUT at the ATS.

    If just the outlets or some of the outlets are not working, but some other 120 VAC stuff does work, yes, check the breaker on the inverter/charger AND/OR your GFI's.
  • MrWizard's avatar
    MrWizard
    Moderator
    Apr 01, 2018
    outlets are down circuit from the breaker box

    just a guess ? do you have a 'whole house inverter' ?

    just because the charge section is working and the batteries are receiving power does not mean everything is working
    the internal pass thru switch/relay for shore power might have failed. or circuit breakers on the inverter might be tripped

    check your inverter-charger for tripped breakers
  • DrewE's avatar
    DrewE
    Explorer II
    Apr 01, 2018
    The converter would not block 120V power from the motorhome circuits. Given that the generator works and the outlet you're plugging into is live, it pretty much has to be something with the shore power cord or transfer switch or some connections between them. If you have an EMS such as a PI unit, check it also for error codes etc.; often they're wired to only be active on the shore power but not the generator.

About Motorhome Group

38,738 PostsLatest Activity: Jul 25, 2025