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<font face="Verdana">SMA absolutely operates solely on Batt SOC. In
fact, the Germans pride themselves on their "superior" SOC management,
and have convinced some battery manufacturers to extend the battery
warranty based on this "superior" SOC management.<br>
<br>
</font>
<pre class="moz-signature" cols="72">See Ya!
Marv
Enphase Energy
707 763-4784 x7016</pre>
<br>
<br>
Darryl Thayer wrote:
<blockquote cite="mid:455070.1550.qm@web51903.mail.re2.yahoo.com"
type="cite">
<pre wrap="">I agree absolutly. But Outback and Apollo are the only systems that monitor and control on SOC. Apollo can operate a relay, and Outback can change settings using the FMDC. I think both systems with a few tweeks are the better way to handel AGM.
DARRYL
--- On Sat, 9/19/09, Hugh <a class="moz-txt-link-rfc2396E" href="mailto:hugh@scoraigwind.co.uk"><hugh@scoraigwind.co.uk></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">From: Hugh <a class="moz-txt-link-rfc2396E" href="mailto:hugh@scoraigwind.co.uk"><hugh@scoraigwind.co.uk></a>
Subject: Re: [RE-wrenches] Charging AGM Batteries
To: "RE-wrenches" <a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a>
Date: Saturday, September 19, 2009, 4:21 AM
It seems to me that you really need
to have a controller that monitors the state of charge in
order to do a good job of recharging sealed batteries.
If they are low then you can push the voltage up but if they
are in an intermediate indeterminate state as with most
small renewable energy systems then you don't know what to
do. Playing safe can mean that the battery does not get a
proper charge (I am told).
</pre>
<blockquote type="cite">
<pre wrap="">The chargers typically found in our industry deliver
</pre>
</blockquote>
<pre wrap="">the same "bulk" charge amperage from initiation of the
recharge all the way to when the absorption voltage is
reached. So...if you set that for a high value the same high
rate would be present not only when the battery is highly
depleted but also when the battery is approaching 80% state
of charge. That seems scary to me.
-- Hugh Piggott
Scoraig Wind Electric
Scotland
<a class="moz-txt-link-freetext" href="http://www.scoraigwind.co.uk">http://www.scoraigwind.co.uk</a>
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