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<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial>There is a XW6048 double-stack that has 11,760W PV and
gets 8200+ W Output (in our Texas heat) and creates about 60kwh per
day.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial>That 8/11-ish number is right at 70%. I am sure the early
spring will be better.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial>I also suggest that 400Ah is the minimum battery bank size
required for a proper sell-re that keeps the battery full enough to prevent
sulfation, but limits overvoltage issues in puffy cloud
conditions.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial>Good luck!</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial>Maverick</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=390543002-25082010>
<DIV dir=ltr align=left><SPAN class=359281006-08082008><FONT color=#0000ff
size=2>
<DIV align=left>
<DIV align=left><FONT size=2><FONT face=Arial><FONT color=#000000>Maverick
Brown<BR><SPAN class=500244616-20112009><FONT size=1>BSEET, NABCEP Certified
Solar PV Installer ®</FONT></SPAN></FONT></FONT></FONT></DIV>
<DIV align=left><SPAN class=093292723-19082008><FONT color=#000000 size=2
face=Arial>President & CEO</FONT></SPAN></DIV>
<DIV><FONT color=#000000 size=2 face=Arial><STRONG>Maverick Solar<SPAN
class=093292723-19082008> Enterprises, Inc.</SPAN><BR></STRONG></FONT><FONT
color=#000080 size=1 face=Arial>12010 West Highway 290, Suite 230, Austin, TX
78737<BR></FONT><FONT size=1><FONT face=Arial><FONT color=#000080><SPAN
class=125113900-26102008>Office:
512-919-4493<BR><SPAN
class=125113900-26102008>Fax:
512-607-6398<BR></SPAN></SPAN>Cell:
512-460-9825<BR>Store:<SPAN
class=359281006-08082008> </SPAN> <SPAN
class=359281006-08082008> </SPAN></FONT></FONT></FONT><A
title=blocked::http://www.mavericksolar.com/
href="blocked::http://www.mavericksolar.com/"><FONT color=#000080 size=1
face=Arial>http://www.mavericksolar.com</FONT></A><BR><FONT size=1><FONT
face=Arial><FONT color=#000080>Help: <SPAN
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</SPAN></FONT></FONT></FONT><A href="http://www.mavericksolar.net/"><FONT
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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>Travis
Creswell<BR><B>Sent:</B> Tuesday, August 24, 2010 4:11 PM<BR><B>To:</B>
'RE-wrenches'<BR><B>Subject:</B> [RE-wrenches] Net AC kW Derate Factor for
Xantrex XW inverter andXW opinions<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Greetings Esteemed
Wrenches,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">What would you recommend I use for a
total de-rate factor for a grid tied Xantrex XW system with 4.14 kW of Yingli
230 watt modules? Yingli’s are rated +/- 3% which probably means at least
-5% to be safe. Would a total of .7 be about right? Battery bank
will likely be one string of L-16’s or similar.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">I’m helping a customer calculate
annual production for his rebate. At this point it’s just an estimate as
<st1:State w:st="on"><st1:place w:st="on">Arkansas</st1:place></st1:State>
wisely bases their rebate on actual production and requires a dedicated meter
for the system. I’m using the Wiley Asset tool to adjust for shading and
azimuth. The Asset software uses .77 as a default but that’s for a
battery-less system.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Probably before I head too far down
this road what does anyone have to say about using the XW6048 for a grid tied
application? I’ve used a few XW’s off grid and have been pleased but never
grid tied one.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Best,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Travis
Creswell<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Ozark Energy
Services<o:p></o:p></SPAN></FONT></P></DIV></BODY></HTML>