UPG 250 amp hour agm batteries

full_mosey wrote:

westend wrote:

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There is little information to prove that AGM batteries will last any longer than FLA batteries in a very dynamic situation like an RV, where current draws are high relative to the capacities involved. Most of the anecdotal information I've read points to the FLA, larger plate batteries, like GC2 or larger deep cycle batteries garnering the longevity crown.
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To be fair, running a fridge is not exactly a dynamic situation re comparing AGM to FLA. It is simply another low Amp draw that accumulates AHs over a long period. This is exactly the usage that gives a deep cycle FLA a decided advantage.

AGM does have the advantage whenever dynamic includes high wattage inverter draws. That is, draws that cause the deep cycle FLAs to sag and precludes desired use of the bank by the RVer.

Each RVer needs to choose the battery type that fits their style.

HTH;
John

Agreed about the style. I was using dynamic in the context of the charging/depletion schedule and not in overall amount of draw. If a user had AGM batteries and enough so that the depletion would be less than 80% SOC, the longevity title might go to the AGM's. From my limited experience with AGM, I'm seeing that they are more similar to FLA in use and charging than I first believed.

FWIW, my little dorm fridge operates at almost exactly 80w.