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Try to stick to a starting battery high current capability and deep cycle battery for house if you can afford 2 banks. I installed AGM's 5 yrs ago and swear by them. Only concern is charging them. Improper charging will reduce their life as most batteries, more forgiving than the old gel cells. They have a higher acceptance level for quicker charging than wet cells and can take the discharge cycles better. Remember the deeper the cycles the less cycles there will be. AGM's were originally designed for military durability in aircraft. Nice to have them for reliability in the boat.
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Cal 9.2 #19 SilverSwan
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