I would grab a voltmeter and verify if you have power to the 7 pin and the battery is being charged while connected to shore power. My next guess is within the converter you may have a blown fuse for protection against reversed polarity, aka connecting up the battery backwards.
Good way to run your battery down and make your neighbors unhappy with you - remember lights out after 10PM
__________________ Roy and Carolyn
I claim Horse Creek Country in Southern Ill - Momabear is from North Texas
We live in King George VA RETIRED DOD DOAF DON CONTRACTOR Electronics Tech 42YRS
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Maybe I'm sheltered, but I'm just seeing this for the first time at CG this year.... (hooking up your running lights in the evening). Out of an entire CG, two units side-by-side ran their running lights every night.