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<DIV><FONT size=2 face=Arial>I have a crazy...I mean <EM>creative</EM> customer
who wants a BB system so that he can run off-grid during peak and partial-peak
rate hours: 1 to 7pm is peak, 7 to 9pm is partial from PG&E. He got this
great idea from a tech at a reputable power optimizer manufacturer, whom I will
not name here, who said, "you've got the batteries just sitting there;
why not put them to work?"</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Initially he wanted his PV to operate while the sun
is shining and the grid is down...and his batteries to supply power when the sun
<EM>and</EM> grid is down. But now he wants his back-up system to do it all.
We've touched on all the obvious points: </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>- Peak buying is also peak selling</FONT></DIV>
<DIV><FONT size=2 face=Arial>- Physics and efficiency losses determine that the
energy he "saves" will never equal the energy he can put back into his
system.</FONT></DIV>
<DIV><FONT size=2 face=Arial>- Decreased battery life due to increased
cycling</FONT></DIV>
<DIV><FONT size=2 face=Arial>- Costs for batts and special inverters versus
generator</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>What is the <U>definitive</U> argument against BB
in general and this "peak shaving" idea in particular?</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Thanks pros.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Eric</FONT></DIV>
<DIV><FONT size=2 face=Arial>SunHarvest</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV>----- Original Message ----- </DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=toddcory@finestplanet.com
href="mailto:toddcory@finestplanet.com">toddcory@finestplanet.com</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> Friday, April 26, 2013 11:57
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] Battery
Back-up and Grid Tie</DIV>
<DIV><BR></DIV><FONT size=3 face=arial>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px">our
power outages generally come from bad weather too... and of course when the
weather is bad the pv does next to nothing. so for emergency backup, i
recommend a generator.</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"> </P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px">todd</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"> </P>
<P
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<P
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<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"> </P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"> </P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px">On
Friday, April 26, 2013 10:33am, "Bill Turberville" <<A
href="mailto:billturb@ece-llc.com">billturb@ece-llc.com</A>>
said:<BR><BR></P>
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<P
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class=MsoNormal><SPAN style="COLOR: #1f497d">Not very often, and usually for
no more than an hour or two, although it has been down as long as 5 days,
either during tornado season, or ice taking down power lines. What these
people are looking for is Just In Case a big event happens. They do not
want to have all those panels just sitting there.</SPAN></P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal><SPAN style="COLOR: #1f497d"></SPAN></P>
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<DIV
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<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal><STRONG><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">From:</SPAN></STRONG><SPAN
style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt"> <A
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</A>
[mailto:<A
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</A>]
<STRONG>On Behalf Of </STRONG>Jay Peltz<BR><STRONG>Sent:</STRONG> Friday,
April 26, 2013 12:25 PM<BR><STRONG>To:</STRONG>
RE-wrenches<BR><STRONG>Subject:</STRONG> Re: [RE-wrenches] Battery Back-up and
Grid Tie</SPAN></P></DIV></DIV>
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style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal> </P>
<DIV>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal>Hi bill</P></DIV>
<DIV>
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class=MsoNormal> </P></DIV>
<DIV>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal>Just how often is your grid down?</P></DIV>
<DIV>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal> </P></DIV>
<DIV>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal>Jay</P></DIV>
<DIV>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal>Peltz power<BR><BR>Sent from my iPhone</P></DIV>
<DIV>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px 0px 12pt; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal><BR>On Apr 26, 2013, at 10:01 AM, Bill Turberville <<A
href="mailto:billturb@ece-llc.com">billturb@ece-llc.com</A>>
wrote:</P></DIV>
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<DIV>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal>I live in a TVA area where there is a Feed In Tariff.
Everything that is generated by the PV array feeds into the grid through a
Generation Meter that ties-in ahead of the house meter. I have started
getting calls from customers who hate having a solar array that does not
generate when the grid is down but the sun is shining, but who also want to
get the $.12 premium when the grid is connected. We have lots of
systems with SMA Sunnyboy inverters, but more with Enphase
micro-inverters. Rather than trying to reinvent the wheel, what you
found to be the best solution for this type of installation?</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal> </P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal>W.C. (Bill) Turberville P.E.</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal>President</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal> </P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal>ECE Solar</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal>Electrical Contracting Enterprises LLC</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal>3080 Stage Post Road Suite 107</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal>Bartlett, TN 38133</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal> </P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal>901-348-9230 ext 101 phone</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal>901-348-2192 fax</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal>901-289-6346 cell</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal><A
href="mailto:billturb@ece-llc.com">billturb@ece-llc.com</A></P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal> </P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; TEXT-AUTOSPACE: ; PADDING-TOP: 0px"
class=MsoNormal>NABCEP Certified PV Installation Professional 032611-320</P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal> </P>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
class=MsoNormal> </P></DIV></BLOCKQUOTE>
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<DIV>
<P
style="PADDING-BOTTOM: 0px; MARGIN: 0px 0px 12pt; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px"
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