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<div class=Section1>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>As the two of you stride away from this
issue with self-congratulatory back slaps and dismissive comments about nutty
clients, you might also find time to arm yourself with a modicum of facts about
current surges in motors and surge response of inverters. A 3.5 ton A/C may be
excessive, but is a 3/4 ton A/C, too? What about a swamp cooler, a whole house
fan or a 1 hp water pump? Each client (in my book) deserves well reasoned
guidance based on facts (regardless of how clients we need to provide it to).</span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>BTW, I agree 100% that we need to preach
energy efficiency and heating with gas vs. electricity.</span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>- Peter Parrish</span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font></p>
<div>
<p><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>
California Solar Engineering, Inc.<br>
820 Cynthia Ave., Los Angeles, CA 90065<br>
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885<br>
CA Lic. 854779, NABCEP Cert. 031806-26<br>
peter.parrish@calsolareng.com</span></font><font size=2 color=blue face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:blue'> </span></font></p>
</div>
<div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<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>Tom Elliot<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, August 20, 2008
2:57 PM<br>
<b><span style='font-weight:bold'>To:</span></b> RE-wrenches<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [RE-wrenches] offgrid
system question</span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thank you Jeff, for asking the obvious. I've been agog
that no one seemed to think this was a nutty situation for an off-grid home.</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>T.</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
</div>
<blockquote style='border:none;border-left:solid black 1.0pt;padding:0in 0in 0in 3.0pt;
margin-left:2.7pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- </span></font></p>
</div>
<div style='font-color:black'>
<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:jryago@netscape.com" title="jryago@netscape.com">Jeff Yago</a> </span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:re-wrenches@lists.re-wrenches.org"
title="re-wrenches@lists.re-wrenches.org">RE-wrenches</a> </span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Wednesday, August
20, 2008 10:57 AM</span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Re: [RE-wrenches]
offgrid system question</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
</div>
<div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I may be out of line here, but most of these comments have
been related to making the right program settings and startup surge current
issues. I did not read any comments that this client is nuts to try and
run a 3.5 ton air conditioner from a solar off-grid system, let alone a system
with such a very small capacity. </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I would be surprised if this small existing solar array
and batteries can keep up with the regular loads like lights, kitchen
appliances, refrigerators, and entertainment equipment, let alone also
running a central air conditioner. . </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I would not just debate the problems of surge current,
I would like to know how this little solar system is going to keep up with the
constant load of approx. 4,000 watts for the AC unit plus another 500 watts for
the air handling unit which he did not mention. With a constant drain of
4,500 watts, just how long do you think this battery bank will
last? For most locations, during peak summer days a typical AC unit
needs to run constantly 12 to 16 hours per day. </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I would be interested in hearing from others on this, but
here in the humid and hot east it is not possible to provide air conditioning
for an off-grid home unless we are just cooling one or two rooms with a low
energy Sanyo type split system in the 1/2 to 3/4 ton range. Of course if
you have enough solar modules and batteries you could run anything, but
can you afford it?</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>We do lots of off-grid systems and the first thing we tell
clients is to not even think about having air conditioning, electric hot water
heaters, or electric clothes dryers unless they have a really big bag of money.</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Jeff Yago</span></font></p>
</div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><br>
</span></font></p>
<div class=MsoNormal align=center style='text-align:center'><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>
<hr size=2 width="100%" align=center>
</span></font></div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Netscape. Just the Net You Need.</span></font></p>
</div>
<pre><font size=2 face="Courier New"><span style='font-size:10.0pt'>No virus found in this incoming message.</span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>Checked by AVG - http://www.avg.com </span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>Version: 8.0.138 / Virus Database: 270.6.6/1624 - Release Date: 8/20/2008 7:11 PM</span></font></pre>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>_______________________________________________<br>
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<pre><font size=2 face="Courier New"><span style='font-size:10.0pt'>No virus found in this outgoing message.</span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>Checked by AVG - http://www.avg.com </span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>Version: 8.0.138 / Virus Database: 270.6.6/1624 - Release Date: 8/20/2008 7:11 PM</span></font></pre></div>
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