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<DIV>Alan,</DIV>
<DIV> </DIV>
<DIV> It seems like a full load analysis is
a requirement for off-grid. If you're simply encouraging a customer to do
a load analysis you may as well hand them a tail and hope they find the
donkey. Granted it's easy to slide on it as it represents a great deal of
time and most customers don't really "get it". It's the most difficult part of
off-grid.</DIV>
<DIV> </DIV>
<DIV> Fairly large?.....Hmmm, 20-25 CF? I
would figure 1.7 KWhr/day. With a freezer being a constant load and winter
having less solar, of course your idea of having the freezer outside would
help. Though you're having to cool more in the summer, there is more
solar to do so.</DIV>
<DIV> </DIV>
<DIV> Will a DC-to-DC converter run a DC
freezer? </DIV>
<DIV> </DIV>
<DIV> Yes, I think 55 watts is a good
number for the "typical" 48", slow-med speed AC ceiling fan. They
certainly have their place but there goes another 1.3 KWhrs/day as people tend
to leave them on all the time.</DIV>
<DIV> </DIV>
<DIV>Bill</DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=allan@positiveenergysolar.com
href="mailto:allan@positiveenergysolar.com">Allan Sindelar</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, December 10, 2012 8:12
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [RE-wrenches] Two Load
Questions</DIV>
<DIV><BR></DIV>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 energystar.gov 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 energystar.gov 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
face="Times New Roman, Times, serif"
color=#000099><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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