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<div class="moz-cite-prefix">Just a small part of an answer, Mark,<br>
The C-40 has a non-adjustable two hour absorption cycle. That's
good for a system in regular off grid use, but tends to lead to
excessive water consumption in an application with intermittent
use, such as a summer cabin. Even if there's no overnight load,
the batteries stay in the gassing range for two hours (plus bulk),
leading to more water loss than is needed. A "done amps" or
"return amps" function helps overcome this.<br>
<br>
In your case, it won't be a problem with the new batteries, as
long as the setpoint is correct. My understanding is that the
proper absorption voltage, which is below the gassing voltage of
flooded batteries, may be maintained indefinitely with no adverse
effect. With Concordes it's 2.385 +/- .0015 vpc, with temperature
compensation.<br>
Allan<br>
<br>
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<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a href="mailto:Allan@positiveenergysolar.com"><font
color="#000099" face="Times New Roman, Times, serif"><u>Allan@positiveenergysolar.com</u></font></a></small><font
face="Times New Roman, Times, serif"><br>
<span style="font-size: 10pt;">NABCEP Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b><br>
3209 Richards Lane (note new address)<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/"
target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></font>
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<span style="font-size: 10pt;"><br>
</span> </div>
On 10/11/2012 1:45 PM, Mark Dickson wrote:<br>
</div>
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<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial;color:navy">Sorry
not to hijack, but. . <o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial;color:navy">I am
sort of in the same situation. . .<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial;color:navy">I am
replacing a worn out battery bank (24
off-brand T-105s in six strings of 4) with
nice new set of AGMs (3 strings of
4). It has a solar array and Whisperer 200
turbine charging the bank and
no generator. Customer says the old
batteries which are pretty worn, were
always boiling and losing water. I tested
all the cells with a hydrometer
on my last visit and found no obviously dead
cells but all of them seemed week
with some visual sulfation. I am thinking
the bad batteries are
most likely the culprit, but I would like
some ideas on what and how to test
both the C40 and Whisper controller to make
sure they were not causing the
overcharging. Any ideas on what tests to
perform? <o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<div>
<p class="MsoNormal"><font color="navy"
face="Comic Sans MS" size="2"><span
style="font-size:10.0pt;font-family:"Comic
Sans MS";color:navy">Best regards,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy"
face="Comic Sans MS" size="2"><span
style="font-size:10.0pt;font-family:"Comic
Sans MS";color:navy"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><st1:personname w:st="on"><font
color="navy" face="Comic Sans MS" size="2"><span
style="font-size:10.0pt;font-family:"Comic
Sans MS"; color:navy">Mark Dickson</span></font></st1:personname><font
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style="font-size:10.0pt;font-family:"Comic
Sans MS";
color:navy">,</span></font><font
color="navy" face="Times New Roman" size="3"><span
style="font-size:12.0pt;font-family:"Times
New Roman";color:navy"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy"
face="ArialMT" size="2"><span
style="font-size:
10.0pt;font-family:ArialMT;color:navy">NABCEP
Certified Solar PV Installer
™<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy"
face="Comic Sans MS" size="2"><span
style="font-size:10.0pt;font-family:"Comic
Sans MS";color:navy">Oasis Montana
Inc.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy"
face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial;color:navy"><img
id="_x0000_i1026"
src="cid:part3.01060703.00050408@positiveenergysolar.com"
height="59" width="64"></span></font><st1:personname
w:st="on"><b><font face="Arial" size="1"><span
style="font-size:8.0pt;font-family:Arial;font-weight:
bold">Mark Dickson</span></font></b></st1:personname><b><font
face="Arial" size="1"><span
style="font-size:8.0pt;font-family:Arial;font-weight:bold">,
Certified Solar PV Installer</span></font></b><b><font
color="navy" face="Arial" size="1"><span
style="font-size:8.0pt;font-family:Arial;color:navy;
font-weight:bold"><o:p></o:p></span></font></b></p>
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face="Arial" size="2"><span
style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
</div>
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<p class="MsoNormal"><b><font color="black"
face="Tahoma" size="2"><span
style="font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold">From:</span></font></b><font
color="black" face="Tahoma" size="2"><span
style="font-size:10.0pt;font-family:Tahoma;
color:windowtext">
<a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>]
<b><span style="font-weight:
bold">On Behalf Of </span></b>Allan
Sindelar<br>
<b><span style="font-weight:bold">Sent:</span></b>
Thursday, October 11, 2012
1:23 PM<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>
Re: [<st1:personname w:st="on">RE-wrenches</st1:personname>]
Old School 12V Independent System?</span></font><font
color="black" face="Times New Roman"
size="3"><span style="font-size:12.0pt;
font-family:"Times New
Roman";color:windowtext"><o:p></o:p></span></font></p>
</div>
<p class="MsoNormal"><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<div>
<p class="MsoNormal"><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt">Bill,<br>
Give her sealed batteries for this
application. We like Concorde SunXtender,
both because the few sets that have been
in operation off grid have shown
exceptional life (we have one series pair
of PVX-2580Ts going into its 13th
year still in good shape) and are
available in sizes that easily replace
standard flooded sizes. Contact me off
list for a good distributor referral.<br>
<br>
If indeed they have "abused the batteries
to death" then the
batteries are indeed dead. I'd suggest
that you sell her replacement sealed
batteries. They'll arrive charged. Thus
during daytime you can use the array
itself and the full batteries to test the
C-40, and set proper regulation
voltage at the same time. Save the
customer a second service call, make you a
decent sale, worth the trip.<br>
<br>
Just my $.02001 <br>
Allan<br>
<o:p></o:p></span></font></p>
<div>
<p class="MsoNormal"><b><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt;font-weight:bold">Allan
Sindelar</span></font></b><br>
<font size="2"><span
style="font-size:10.0pt"><a
moz-do-not-send="true"
href="mailto:Allan@positiveenergysolar.com"><font
color="#000099"><span
style="color:#000099">Allan@positiveenergysolar.com</span></font></a></span></font><br>
<font size="2"><span
style="font-size:10.0pt">NABCEP
Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales
Professional<br>
<st1:state w:st="on"><st1:place
w:st="on">New Mexico</st1:place></st1:state>
EE98J Journeyman Electrician<br>
Founder and Chief Technology Officer<br>
<b><span style="font-weight:bold">Positive
Energy, Inc.</span></b><br>
<st1:street w:st="on"><st1:address
w:st="on">3209 Richards Lane</st1:address></st1:street>
(note new address)<br>
<st1:place w:st="on"><st1:city w:st="on">Santa
Fe</st1:city>, <st1:state w:st="on">New
Mexico</st1:state> <st1:postalcode
w:st="on">87507</st1:postalcode></st1:place><br>
<b><span style="font-weight:bold">505
424-1112</span></b><br>
<a moz-do-not-send="true"
href="http://www.positiveenergysolar.com/"
target="_blank">www.positiveenergysolar.com</a><u1:p></u1:p></span></font>
<o:p></o:p></p>
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mso-margin-bottom-alt:auto"><font
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u2:st="on"><st1:city u2:st="on"></st1:city><st1:state
u2:st="on"></st1:state><st1:postalcode
u2:st="on"></st1:postalcode></st1:place><span
style="font-size:11.0pt"><o:p> </o:p></span></font></p>
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style="font-size:11.0pt"><o:p> </o:p></span></font></p>
</div>
<p class="MsoNormal"><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt">On 10/11/2012
1:07 PM, William Dorsett wrote:<o:p></o:p></span></font></p>
</div>
<blockquote
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<p class="MsoNormal"><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt">A client has an
old school 12VDC remote cabin,
(SunDanzer fridge, Sureflo pump, 12VDC
lights and fans) which she visits
perhaps every three months. It isn’t her
interest to clean terminals,
much less run the generator through one of
her two days of country quiet to
equalize the battery bank. The consequence
is that she (and guests who borrowed
the cabin) have abused the batteries to
death. The first suggestion will be a
maintenance agreement…yes. First I need to
test the Trace C-40 charge
control and would appreciate suggestions
on choosing a portable 0-16V variable
voltage power supply to check its function
and set points etc. It should be as
easy as a couple batteries in series,
multimeter and a potentiometer. Thanks
for your thoughts.<o:p></o:p></span></font><u1:p></u1:p></p>
<p class="MsoNormal"><u1:p><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt"> <o:p></o:p></span></font></u1:p></p>
<p class="MsoNormal"><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt">Bill Dorsett<o:p></o:p></span></font><u1:p></u1:p></p>
<p class="MsoNormal"><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt">Sunwrights<o:p></o:p></span></font><u1:p></u1:p></p>
<p class="MsoNormal"><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt">1715 <st1:city
w:st="on"><st1:place w:st="on">Leavenworth</st1:place></st1:city><o:p></o:p></span></font><u1:p></u1:p></p>
<p class="MsoNormal"><st1:place w:st="on"><st1:city
w:st="on"><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt">Manhattan</span></font></st1:city>,
<st1:state w:st="on">KS</st1:state></st1:place><u1:p></u1:p><o:p></o:p></p>
<p class="MsoNormal"><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt">785/539-1956
Home/Office<o:p></o:p></span></font><u1:p></u1:p></p>
<p class="MsoNormal"><u1:p><font color="black"
face="Calibri" size="2"><span
style="font-size:11.0pt"> <o:p></o:p></span></font></u1:p></p>
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<br>
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