My trailer has sit since the first week of January. Today I plugged it in to get ready for a trip next Monday. I noticed the converter is humming. Is this normal? I've noticed it before when campi...
The converter is always on when powered with 120V. If it sees a discharged battery and is a multistage charger, it will output the most current it can. After charging for many hours and the batteries are completely charged, the converter will lower it's output and, if a multistage charger, will revert to a float voltage and current.
For more focused advice, you can tell us what converter and how many batteries of what type you have.
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