I have two AGM batteries for the coach. They were purchased at Batteries plus Bulbs about three years ago. When the coach is being stored, I maintain them with an AGM specific charger with the USE/STORE switch set to store and the batteries' grounds disconnected.
The chassis battery is about two years old and is a flooded lead acid battery that is maintenance free.
When the USE/STORE switch in set to USE, and when the engine is running, all batteries are being charged. When shore power or the generator is running, all batteries are being charged.
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