I just replaced the two Harris batteries that failed. According to the sticker on the side of the batteries, they were made in 4/14. I replaced them with AGM batteries from Batteries Plus Bulbs for $319 each. After reading this thread, it is possible that the converter in our 2015 27K Windsport isn't designed to maintain the batteries? I wonder what specific convertor anyone has used to replace the one that came in their Thor RV?
According to the RV manual, the converter is designed to provide battery maintenance once the batteries have reached a fully charged state.
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