I do not plug our Monty into shore power for storage. I use a Battery Tender Plus and have not had a problem in 8 years. They keep the battery charged but does not overcharge like a regular battery charged can do. They are available at Walmart or parts store and have a light system so a quick glance lets you know what is going on.
Francis and Linda
2016 3582 RL
2009 Freightliner M2106 Cummins 8.3
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