Forum Discussion

KeTuanis's avatar
KeTuanis
Explorer
Apr 08, 2019

BATTERIE/CHARGING ISSUES

Hi guys, I left my trailer plugged into the car tow package overnight(7 prong) and I woke up to dead batteries, both trailer and car.

Even though my trailer was plugged into the 30amp station at the rv park.

Will the inverter not charge the batteries if I leave my trailer plugged in the car?

Help!
  • wgriswold's avatar
    wgriswold
    Explorer
    Apr 08, 2019
    wnjj wrote:
    Boomerweps wrote:
    KeTuanis wrote:
    Thank you for your reply. Very helpful. I will check those right away.

    And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?


    I just look at the clock on the microwave.
  • wnjj's avatar
    wnjj
    Explorer II
    Apr 08, 2019
    Boomerweps wrote:
    KeTuanis wrote:
    Thank you for your reply. Very helpful. I will check those right away.

    And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?

    Previous poster meant to check an Alternating Current only device to check your shore power. That could be your Air Conditioning.

    Correct. Plug in a lamp, cell phone charger, use the microwave if you have one or even the air conditioner if you'd like ;). Some folks make the mistake that because the lights are on and the fridge runs that the shore power is good.
  • Boomerweps's avatar
    Boomerweps
    Explorer
    Apr 08, 2019
    KeTuanis wrote:
    Thank you for your reply. Very helpful. I will check those right away.

    And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?

    Previous poster meant to check an Alternating Current only device to check your shore power. That could be your Air Conditioning.
  • KeTuanis's avatar
    KeTuanis
    Explorer
    Apr 08, 2019
    Thank you for your reply. Very helpful. I will check those right away.

    And to clarify, the only reason to run the AC is to make sure I am getting a good feed from the RV electrical station, right?
  • wnjj's avatar
    wnjj
    Explorer II
    Apr 08, 2019
    Yes, the converter (not inverter) should charge the on-board trailer batteries and in your case without an isolater to the tow vehicle it should charge the vehicle battery too.

    Make sure of the following:

    1. AC power is on inside the trailer (e.g. check a 120V receptacle).
    2. The breaker for the converter is not tripped. Turn them all off and back on the be sure.
    3. The fuses on the converter aren't blown from a previous overload or reversed battery install.

    If you have access to a voltmeter, check that the voltage on the battery rises from 12.x to 13.x or more when you plug in shore power. If it doesn't change when you plug in, the converter isn't powered or working.

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