Talked to dealer-- 13.2 normal output of converter unhooked from batt. Also felt 12.5-12.7 was normal reading while charging very discharged batt. Used diagnostic conductance charger at work to charge batt., charged for two hours and then failed batt. I checked tow vehicle, putting out about 14.2 volts at trailer connector. Regardless, if the fridge on 12v, refer fan, and other parasitic draws are on batt while towing, a weak battery may never keep up. Think I'm going to get new batt., use a battery tender with batt. unhooked when not in use, and if converter ends up not cutting it(i.e. charging upkeep) I will look into upgrading it. Take care, Scott
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