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TLLOYD's avatar
TLLOYD
Explorer
Jun 09, 2018

How to check inverter

I have a Xantrex Pro XM1800 inverter on my 2016 RV. After the just over a year of FINALLY getting all of the issues fixed during the first year and a half with the help of Thor I have since ran into an issue with the inverter.

I have two 6 volt batteries both showing above 6.5 volts. I have checked the volts to the inverter and it is above 13 volts.

When I turn the inverter on it just flashes on the panel. Sometimes 13.5, sometimes OL and the inverter itself located in the rear outside cabinet "clicks" like a heartbeat. I guess like it wants to come on but doesn't. The lights in the RV dim in and out also and the refrigerator does the same. I have noticed the inverter itself gets hot to the touch.

I turn everything off (lights and refrigerator) and it still does the same thing.

I can check the load in as the power cables from the batteries are exposed where they hook up to the inverter. I read to check the load out, but can't figure out how to do this.

I basically have to run the generator when traveling to keep the refrigerator cold until I hook up to shore power.
  • Voltage alone does not indicate battery health. How old are they? Can you disconnect all loads and see what happens?

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