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<p class=MsoNormal><b><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:11.0pt;font-family:"Comic Sans MS";color:navy;font-weight:
bold'>Hi Peter,<o:p></o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:11.0pt;font-family:"Comic Sans MS";color:navy;font-weight:
bold'><o:p> </o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:11.0pt;font-family:"Comic Sans MS";color:navy;font-weight:
bold'>At least some AGM’s (like the Concorde) can handle very aggressive
charging rates, provided you have good temperature compensation to reduce the
possibility of a thermal runaway.<o:p></o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:11.0pt;font-family:"Comic Sans MS";color:navy;font-weight:
bold'><o:p> </o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:11.0pt;font-family:"Comic Sans MS";color:navy;font-weight:
bold'>Also the 14.6 VDC is a little higher than recommended, at least for the Concorde
brand. 14.4 VDC (2.40 V per cell) is the recommended max. BTW, Concorde has a
great Technical manual about their AGM’s; much of which applies to most
quality AGM’s. You can download it from their web site. <a
href="http://www.concordebattery.com/">www.concordebattery.com</a><o:p></o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:11.0pt;font-family:"Comic Sans MS";color:navy;font-weight:
bold'><o:p> </o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:11.0pt;font-family:"Comic Sans MS";color:navy;font-weight:
bold'>Steve<o:p></o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:11.0pt;font-family:"Comic Sans MS";color:navy;font-weight:
bold'> <o:p></o:p></span></font></b></p>
<div>
<p class=MsoNormal><strong><b><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'>Steve Bell</span></font></b></strong><font
size=2 color=navy face="Trebuchet MS"><span style='font-size:10.0pt;font-family:
"Trebuchet MS";color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><em><i><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'>Technical
Support Specialist </span></font></i></em><font size=2 color=navy
face="Trebuchet MS"><span style='font-size:10.0pt;font-family:"Trebuchet MS";
color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><strong><b><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'>SunWize
Technologies, Inc.</span></font></b></strong><font color=navy
face="Trebuchet MS"><span style='font-family:"Trebuchet MS";color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'>#1 Sun Street</span></font><font
color=navy face="Trebuchet MS"><span style='font-family:"Trebuchet MS";
color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><u1:place u2:st="on"><u1:City u2:st="on"><st1:place w:st="on"><st1:City
w:st="on"><font size=2 color=navy face="Trebuchet MS"><span style='font-size:
10.0pt;font-family:"Trebuchet MS";color:navy'>Stelle</span></font></st1:City><font
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font-family:"Trebuchet MS";color:navy'></u1:City>, <u1:State u2:st="on"><st1:State
w:st="on">IL</u1:State></st1:State> <u1:PostalCode u2:st="on"><st1:PostalCode
w:st="on">60919</u1:PostalCode></st1:PostalCode> <u1:country-region u2:st="on"><st1:country-region
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color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'>(815) 256-2222
ext. 23</span></font><font color=navy face="Trebuchet MS"><span
style='font-family:"Trebuchet MS";color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'><a
href="mailto:sbell@sunwize.com">sbell@sunwize.com</a></span></font><font
color=navy face="Trebuchet MS"><span style='font-family:"Trebuchet MS";
color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'><a
href="http://www.sunwize.com/">www.sunwize.com</a></span></font><font size=2
face="Trebuchet MS"><span style='font-size:10.0pt;font-family:"Trebuchet MS"'><o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Peter Parrish<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, September 15, 2009
9:33 AM<br>
<b><span style='font-weight:bold'>To:</span></b> '<st1:PersonName w:st="on">RE-wrenches</st1:PersonName>'<br>
<b><span style='font-weight:bold'>Subject:</span></b> [<st1:PersonName w:st="on">RE-wrenches</st1:PersonName>]
Charging AGM Batteries</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I have been told that AGM batteries can
withstand pretty aggressive charging rates, with a bulk rate being ½ of C/20.
For example a MK 8A8D, with a C/20 of 245 A-h, would start with 122 A. If this
is okay, can I still use the standard 14.6 V value for switching from Bulk to
Absorb? What about ambient temperature effects at high charge rates?</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>We have need from time to time to charge
AGMs as quickly as we can safely do so, so any information on high charge rates
would be appreciated.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>- Peter</span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br clear=all>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Peter T. Parrish, Ph.D., President<br>
<st1:State w:st="on"><st1:place w:st="on">California</st1:place></st1:State>
Solar Engineering, Inc.<br>
<st1:address w:st="on"><st1:Street w:st="on">820 Cynthia Ave.</st1:Street>, <st1:City
w:st="on">Los Angeles</st1:City>, <st1:State w:st="on">CA</st1:State> <st1:PostalCode
w:st="on">90065</st1:PostalCode></st1:address><br>
CA Lic. 854779, NABCEP TM Cert. 031806-26<br>
<a href="mailto:peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</a>
<br>
Ph 323-258-8883, <st1:City w:st="on"><st1:place w:st="on">Mobile</st1:place></st1:City>
323-839-6108, Fax 323-258-8885 </span></font><font
size=1 color=navy><span style='font-size:9.0pt;color:navy'> </span></font><o:p></o:p></p>
<p><font size=3 color=navy face="Times New Roman"><span style='font-size:12.0pt;
color:navy'> </span></font><font color=blue><span style='color:blue'> </span></font><o:p></o:p></p>
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