That's what I've read about various batteries. For sure, AGM will discharge deeper. And for sure, getting 8 years on a set of AGM batteries at a solar site is nothing to sneeze at. And not having to go to a remote site with a jug of distilled water is not a small thing either.

bp
<part15sbs{at}gmail{dot}com>

On 2/9/2015 4:22 PM, TJ Trout wrote:
Are you positive agm outlasts flooded cell's, if proper maintenance is done?

On Mon, Feb 9, 2015 at 4:21 PM, Bill Prince <part15...@gmail.com <mailto:part15...@gmail.com>> wrote:

    You want AGM batteries.  They generally last longer, and are
    maintenance free (no water required).  They can also handle deeper
    discharge cycles than everything except lithium.

    I recently had to get some batteries ASAP, and found what I needed
    at a local Interstate battery store.  We will see how long they
    last.  We've gotten as much as 8 years on our Concorde SunXtenders
    (all AGM).

    bp
    <part15sbs{at}gmail{dot}com>

    On 2/9/2015 9:57 AM, That One Guy wrote:
    I know this horse is about as abused as a woman that doesnt
    listen well, but Im looking for a brand/model number of battery
    that would be god for sites, primarily in the winter but some
    heat in the summer that we can replace the APC external packs with.

    Id like to source them locally like NAPA, Autozone, etc rather
    than order them if possible.

    What exactly am I looking for in a battery. Most likely the sites
    that these would go to are sites we would put a generator on, so
    its not likely they would be depleted, but is a rare possibility.
    Mainly we are looking to get a longer window to get a generator
    to the site and a longer run if the generator fails or runs out
    of fuel.

    When running a battery bank is it recomended to buy all the
    batteries at the same time and replace them at the same time?

-- All parts should go together without forcing. You must remember
    that the parts you are reassembling were disassembled by you.
    Therefore, if you can't get them together again, there must be a
    reason. By all means, do not use a hammer. -- IBM maintenance
    manual, 1925



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