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<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=078470419-11122012>The Sundanzers can be converted for AC use at the
factory for a nominal cost, and they claim it affects efficiency very
little.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><SPAN class=078470419-11122012><!-- Converted from text/plain format -->
<P><FONT color=#0000ff size=2 face=Arial>Chris Daum<BR>Oasis Montana
Inc.<BR>406-777-4309<BR>406-777-0830 fax<BR><A
href="http://www.oasismontana.com">www.oasismontana.com</A><SPAN
class=078470419-11122012> </SPAN><BR><SPAN
class=078470419-11122012></SPAN> </FONT></P></SPAN></DIV><BR>
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<FONT size=2 face=Tahoma><B>From:</B> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>Larry
Crutcher,Starlight Solar Power Systems<BR><B>Sent:</B> Tuesday, December 11,
2012 11:56 AM<BR><B>To:</B> RE-wrenches<BR><B>Subject:</B> [RE-wrenches] DC, or
not DC, Dat is Da question (Two Load Questions)<BR></FONT><BR></DIV>
<DIV></DIV>Why would one specify DC voltage appliances or lighting for off grid
systems today when we have sub-buck-a-Watt PV solar power? If you have
space, you can make the added power that conventional AC appliances draw for
very low cost. It could even be argued that the cost for DC items, wiring,
distribution gear and labor will cost much more than simply adding more PV solar
and staying all AC.
<DIV>
<DIV><BR></DIV>
<DIV>I don't like wasting resources and I understand old school thinking when PV
modules were very expensive, but with high efficiency AC appliances and low cost
inverters and PV modules, does it still make any sense? Shine some light on my
thinking.
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<DIV><BR class=Apple-interchange-newline>Larry Crutcher</DIV>
<DIV>Starlight Solar Power Systems</DIV></DIV></SPAN></SPAN>
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<DIV>
<DIV>On Dec 10, 2012, at 9:12 PM, Allan Sindelar wrote:</DIV><BR
class=Apple-interchange-newline>
<DIV bgcolor="#FFFFFF" text="#000000">Wrenches,<BR>We still try to encourage
prospective off grid customers to do a full load analysis as an initial step in
the system design process. To the point:<BR><BR>1) What is a good watt-hours/day
figure to use for a typical, modern, new, carefully chosen, fairly large
conventional AC chest freezer, if kept in a heated indoor location? Assume 65
degrees and seldom opened.<BR><BR>I will encourage that the freezer be located
in a shaded, protected outdoor location, in order to greatly reduce winter
energy consumption, but I need a good base figure to work with. <BR><BR>The
proposed system will most likely be 48Vnom, so a Sundanzer or similar DC freezer
is out.<BR><BR>2) Same question for a ceiling fan, for general slow circulation
of winter heat. The <A href="http://energystar.gov">energystar.gov</A> list
gives relative cfm efficiency but not wattages. Is 55W still a good figure to
use as a default?<BR><BR><BR>I have attached a condensed <A
href="http://energystar.gov">energystar.gov</A> list for the freezers, but
wonder what other off grid Wrenches typically use. Also, I'm not sure that
Wrenches posts allow attachments, so this may not appear with my
message.<BR><BR>Thank you,<BR>Allan<BR>
<DIV class=moz-signature>-- <BR><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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