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On 9/3/2011 7:57 PM, Darryl Thayer wrote:
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<div style="RIGHT: auto"><span style="RIGHT: auto">I have had
one experiance with equalizers, the batteries be came very
unequal. (over time of course)<var id="yui-ie-cursor"></var><br
style="RIGHT: auto" class="yui-cursor">
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<b><span style="FONT-WEIGHT: bold">From:</span></b> R Ray
Walters <a class="moz-txt-link-rfc2396E" href="mailto:ray@solarray.com"><ray@solarray.com></a><br>
<b><span style="FONT-WEIGHT: bold">To:</span></b>
RE-wrenches <a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a><br>
<b><span style="FONT-WEIGHT: bold">Sent:</span></b>
Saturday, September 3, 2011 5:55 PM<br>
<b><span style="FONT-WEIGHT: bold">Subject:</span></b> Re:
[RE-wrenches] unique battery bank design question<br>
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Systems I tried years ago with Vanner equalizers, still
ended up being unequal. I pulled them all years ago. It
seems to be about as much a problem as not balancing your
battery cables so each battery string has the same wire
resistance,<br>
I know that you couldn't imagine a few amps on 12" of 2/0
making a difference, but after 5 years the battery damage is
very consistent and identifiable.<br>
The only load I would consider tapping would be metering, or
maybe a low milliamp relay. I wouldn't go over 100 mA, and
even then I bet you would see some long term imbalance. I've
seen imbalances due to some batteries just being closer to
a cold outside wall.<br>
<br>
R. Walters<br>
<a moz-do-not-send="true" href="mailto:ray@solarray.com"
ymailto="mailto:ray@solarray.com">ray@solarray.com</a><br>
Solar Engineer<br>
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<br>
<br>
Has anyone that has used battery balancers checked the individual
battery voltages or SG during charge and/or discharge to<br>
see how well the balancers worked ??<br>
<br>
Could it be that the batteries themselves were just not quite the
same age at the start ??<br>
<br>
I would think that a decent balancer system that makes things share
should work pretty well. Maybe the balancer<br>
itself does a bit of unbalaced charge/discharge ?<br>
<br>
boB<br>
<br>
<br>
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