<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>That's why Allan and I only recommend this if a knowledgeable
tech is there to monitor it. It should only take a few minutes to
either see the batteries are just not going to wake up, or for
regular charging to take over. This is basically CPR for the
batteries. You don't ever do it normally, and you stop as soon
as: A) nothing is happening, or B) the battery voltage rises
enough for the charge controller to start doing its job again.</p>
<p>Ray<br>
</p>
<br>
<div class="moz-cite-prefix">On 2/10/18 5:03 PM, Darryl Thayer
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAHsrUiTMi=2cPPhy0ssUjrkQV5sBxnjKAs37_mhqpJFcShQbPA@mail.gmail.com">
<div dir="ltr">Is there not a concern that if the batteries are
showing such low voltage that they will not accept current, and
the voltage will rise to module voltage and put array voltage on
the output of the charge controller?</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Feb 10, 2018 at 12:24 PM, Ray <span
dir="ltr"><<a href="mailto:ray@solarray.com"
target="_blank" moz-do-not-send="true">ray@solarray.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>Allan has a good approach as long as you are there to
monitor it. The wiring is already there, you just have
jump the array positive to the controller output. ( a
little double lugging never hurt anyone....?!!.) <br>
</p>
<p>Even higher voltage arrays with MPPT can be used this
way. They will just put out close to their short
circuit current, as the batteries will pull the array
voltage way down on the IV curve. <br>
</p>
<p>Ray Walters</p>
<p>Remote Solar<br>
</p>
<div>
<div class="h5"> <br>
<div class="m_-7980142737407572821moz-cite-prefix">On
2/10/18 1:37 AM, Sindelar Solar wrote:<br>
</div>
<blockquote type="cite">
<p>Gary, you might try an old-fashioned approach:
bypass the controller to send the array straight
to the batteries until threshold voltage is
reached. More specifically, bypass one of the
controllers; assuming 48, 60 or 72 Vnom depending
on array. Let the other controller remain in
normal operation. Send the unregulated array to
bring initial battery voltage up; then the other
controller takes over and the one that was
bypassed now is reconnected. Better if the
unregulated array is the smaller of the two, I
would suspect.<br>
</p>
<p>What I'm suggesting will work with flooded
lead-acid, and likely VRLA lead-acid as well, as
long as the unregulated array is taken out of the
system before voltage exceeds bulk. It may not
work at all with these Li-I, as I have no
experience with restoring them. Daryl may well be
right about being unrestorable below a threshold
voltage; also the batteries may need an
operational BMS to take a charge. So this is
perhaps just food for thought.</p>
<p>Allan<br>
</p>
<div class="m_-7980142737407572821moz-signature">--
<br>
<div class="m_-7980142737407572821WordSection1">
<p class="MsoNormal" style="line-height:normal"><b><span>Allan
Sindelar</span></b><span><br>
</span><a
href="mailto:allan@sindelarsolar.com"
target="_blank" moz-do-not-send="true"><span>allan@sindelarsolar.com</span></a><span><br>
</span><span>NABCEP Certified PV Installation
Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder (Retired), <span>Positive Energy,
Inc<span
class="m_-7980142737407572821GramE">.</span></span><br>
<b><a href="tel:%28505%29%20780-2738"
value="+15057802738" target="_blank"
moz-do-not-send="true">505 780-2738</a>
cell</b></span><span></span></p>
<div
class="m_-7980142737407572821moz-cite-prefix">On
2/9/2018 6:16 PM, Gary Rochlin wrote:<br>
</div>
<blockquote type="cite">
<div
class="m_-7980142737407572821WordSection1">
<p class="MsoNormal">Does anyone have any
information or specifications for an older
circa 2010-2012 iCel System Lithium Ion
Battery. We are doing a repair on an
older 48V Lithium Ion system consisting of
3-6 ICel batteries wired in parallel and 1
Xantrex 6848 and 2 Xantrex Conext MPPT 60
150 Solar Charge controllers. Via a surge
from SCE system shut down and sat before
we were called in. Batteries are sitting
at 6.67V and the charge controller will
not turn on unless the batteries are at
40V since at the time they were made for
lead acid batteries. I\u2019m looking at
finding the way to charge the iCel
batteries or goose the charge controller
into thinking 40V are coming from the
batteries. I think I\u2019m making sense
here. </p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;color:#0070c0">Blue
Sky Energy </span></b></p>
<p class="MsoNormal"><span
style="color:#0070c0"><a
href="mailto:mtnrider@verizon.net"
target="_blank" moz-do-not-send="true"><span
style="color:#0070c0;text-decoration:none">g.rochlin@</span></a><a
href="http://blue-sky-energy.com"
target="_blank" moz-do-not-send="true">blue-sky-energy.com</a></span></p>
</div>
<pre>______________________________<wbr>_________________
List sponsored by Redwood Alliance
List Address: <a class="m_-7980142737407572821moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" moz-do-not-send="true">RE-wrenches@lists.re-wrenches.<wbr>org</a>
Change listserver email address & settings:
<a class="m_-7980142737407572821moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank" moz-do-not-send="true">http://lists.re-wrenches.org/<wbr>options.cgi/re-wrenches-re-<wbr>wrenches.org</a>
List-Archive: <a class="m_-7980142737407572821moz-txt-link-freetext" href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank" moz-do-not-send="true">http://www.mail-archive.com/<wbr>re-wrenches@lists.re-wrenches.<wbr>org/maillist.html</a>
List rules & etiquette:
<a class="m_-7980142737407572821moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm" target="_blank" moz-do-not-send="true">www.re-wrenches.org/etiquette.<wbr>htm</a>
Check out or update participant bios:
<a class="m_-7980142737407572821moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org" target="_blank" moz-do-not-send="true">www.members.re-wrenches.org</a></pre>
</blockquote>
<p class="MsoNormal"><br>
</p>
</div>
</div>
<br>
<fieldset
class="m_-7980142737407572821mimeAttachmentHeader"></fieldset>
<br>
<pre>______________________________<wbr>_________________
List sponsored by Redwood Alliance
List Address: <a class="m_-7980142737407572821moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" moz-do-not-send="true">RE-wrenches@lists.re-wrenches.<wbr>org</a>
Change listserver email address & settings:
<a class="m_-7980142737407572821moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank" moz-do-not-send="true">http://lists.re-wrenches.org/<wbr>options.cgi/re-wrenches-re-<wbr>wrenches.org</a>
List-Archive: <a class="m_-7980142737407572821moz-txt-link-freetext" href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank" moz-do-not-send="true">http://www.mail-archive.com/<wbr>re-wrenches@lists.re-wrenches.<wbr>org/maillist.html</a>
List rules & etiquette:
<a class="m_-7980142737407572821moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm" target="_blank" moz-do-not-send="true">www.re-wrenches.org/etiquette.<wbr>htm</a>
Check out or update participant bios:
<a class="m_-7980142737407572821moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org" target="_blank" moz-do-not-send="true">www.members.re-wrenches.org</a>
</pre>
</blockquote>
<br>
</div>
</div>
</div>
<br>
______________________________<wbr>_________________<br>
List sponsored by Redwood Alliance<br>
<br>
List Address: <a
href="mailto:RE-wrenches@lists.re-wrenches.org"
moz-do-not-send="true">RE-wrenches@lists.re-wrenches.<wbr>org</a><br>
<br>
Change listserver email address & settings:<br>
<a
href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://lists.re-wrenches.org/<wbr>options.cgi/re-wrenches-re-<wbr>wrenches.org</a><br>
<br>
List-Archive: <a
href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://www.mail-archive.com/<wbr>re-wrenches@lists.re-wrenches.<wbr>org/maillist.html</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm"
rel="noreferrer" target="_blank" moz-do-not-send="true">www.re-wrenches.org/etiquette.<wbr>htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org"
rel="noreferrer" target="_blank" moz-do-not-send="true">www.members.re-wrenches.org</a><br>
<br>
<br>
</blockquote>
</div>
<br>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
List sponsored by Redwood Alliance
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Change listserver email address & settings:
<a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
List-Archive: <a class="moz-txt-link-freetext" href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a>
List rules & etiquette:
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a>
Check out or update participant bios:
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a>
</pre>
</blockquote>
<br>
</body>
</html>