Skip Gundlach wrote:
> I suspect that this has already been discussed, but since I don't have
> access to the archives, I beg your indulgence...
>
> We have new, L16H batteries in our 880AH house bank, flooded cell. In
> a perfect world to make them last longest, I know that they'd never be
> allowed to drop below 100% capacity - but then, what's the point of
> having a battery?
>
> I also know that running them down to 20% on a regular basis will make
> for a short life span.
>
> So, the question (well, maybe two) is:
>
> What is the recommended, real-world cycle? That is, how low do you
> take your flooded batteries on a regular basis? Related, is there a
> readily available source for information on the numbers of cycles to a
> given percentage of discharge in a battery life span? I.e., 500
> cycles to 50% and back to 100% but only 100 cycles to 20% and up to
> 75%, or the like (recognizing that these numbers have no relation to
> any battery made)?
>
> Second, what do those of you with flooded cells, not connected to the
> shore power all the time (that is, full-time cruisers or rarely
> connected to the utility-based power cord) have as a practice? What
> charge regime, and how, do you observe? Never below X%, seldom above
> Y%/Always more than Y% of capacity?
>
> We have a variety of charging sources and differing loads which makes
> for days when we may see close to 50%, and days when it never leaves
> "full" - and since we can't "force" "full" reasonably, we want to make
> sure we're not unreasonably asking for our batteries performance.
>
> Knowledgeable assistance appreciated, and your practice, whether
> empirical or just "is" would also be appreciated.
>
> Thanks.
>
> L8R
>
> Skip (Gundlach) and crew, lying Lucaya, over (what else??) wifi among
> the 14 available open sites we can see
>
> Morgan 461 #2 St. Thomas USVI
> SV Flying Pig KI4MPC
> See our galleries at www.justpickone.org/skip/gallery !
> Follow us at http://groups.yahoo.com/group/TheFlyingPigLog
> and/or http://groups.google.com/group/flyingpiglog
>
> "And then again, when you sit at the helm of your little ship on a
> clear
> night, and gaze at the countless stars overhead, and realize that you
> are
> quite alone on a wide, wide sea, it is apt to occur to you that in the
> general scheme of things you are merely an insignificant speck on the
> surface of the ocean; and are not nearly so important or as
> self-sufficient
> as you thought you were. Which is an exceedingly wholesome thought,
> and one
> that may effect a permanent change in your deportment that will be
> greatly
> appreciated by your friends."- James S. Pitkin
>
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>
Try exploring the Victron Energy web site
(http://www.victronenergy.com/); they have a wide range of excellent
battery chargers, batteries, etc., for sale, and have PDF documents that
you can download about them. In particular, look at:
http://www.victronenergy.com/upload/documents/Datasheet%20-%20Batteries%20-%20rev%2002%20-%20EN.pdf
which is the data sheet for their batteries.
--
---------------------------------------
Jim Maynard Salem, Oregon, USA
"Ignorance is the Mother of Adventure!"
-- Hagar the Horrible
---------------------------------------
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