Even if it's a new camper I would not rule out the battery at all unless you were personally involved in its selection and observed the installation. Unless you know better they may or may not have installed a NEW, adequate battery. A trailer or 2 back the "battery" installed on the brand new trailer was one they found discarded somewhere in some back room (looked like).
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Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
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