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Fulltime50,
Whether or not a special AGM battery charger is needed, is debatable. I've read that they aren't needed, yet some say they are. To be safe, I wired a disconnect for when storing the RV, and keep the AGM batteries on a maintainer that is made specifically for AGM batteries.
I replaced the two 12-volt flooded lead-acid coach batteries with two 12-volt deep cycle, AGM (Batteries plus Bulbs). They are not cheap but they maintain their charge quite well compared to the original batteries, even when new. I have used the AGM batteries without charging them, and when I stopped using them they were at 12.6 volts. Several minutes later (after not having been charged) they were up to 12.8 volts.
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