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Batteries, again, sorry
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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