Hi, knuckle-busters~<div><br></div><div>That's interesting information in the other thread about the actual solar throughput to grid with the Xantrex XW architecture. </div><div><br></div><div>May I now poll the group to learn what percentage throughput is likely if the inverter stack is instead an AC coupled blend of SMA SunnyBoy/SunnyIsland hardware?</div>
<div><br></div><div>Survey says...</div><div><br clear="all">Mick Abraham, Proprietor<br><a href="http://www.abrahamsolar.com">www.abrahamsolar.com</a><br><br>Voice: 970-731-4675<br>
<br><br><div class="gmail_quote">On Tue, Aug 24, 2010 at 8:40 PM, Maverick Brown [Maverick Solar] <span dir="ltr"><<a href="mailto:maverick@mavericksolar.com">maverick@mavericksolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div lang="EN-US" link="blue" vlink="purple">
<div dir="ltr" align="left"><span><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><font color="#0000ff" size="2" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><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><font color="#0000ff" size="2" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><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><font color="#0000ff" size="2" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2" face="Arial">Good luck!</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2" face="Arial">Maverick</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2">
<div align="left">
<div align="left"><font size="2"><font face="Arial"><font color="#000000">Maverick
Brown<br><span><font size="1">BSEET, NABCEP Certified
Solar PV Installer ®</font></span></font></font></font></div>
<div align="left"><span><font color="#000000" size="2" face="Arial">President & CEO</font></span></div>
<div><font color="#000000" size="2" face="Arial"><strong>Maverick Solar<span> 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>Office:
512-919-4493<br><span>Fax:
512-607-6398<br></span></span>Cell:
512-460-9825<br>Store:<span> </span> <span> </span></font></font></font><a title="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>
</span></font></font></font><a href="http://www.mavericksolar.net/" target="_blank"><font color="#000080" size="1" face="Arial">http://www.mavericksolar.net</font></a><span><br><font color="#000080" size="1" face="Arial">Corporate:
</font><a href="http://www.mavericksolarenterprises.com/" target="_blank"><font color="#000080" size="1" face="Arial">http://www.mavericksolarenterprises.com</font></a></span></div></div></font></span></div></span></div>
<br>
<div dir="ltr" lang="en-us" align="left">
<hr>
<font size="2" face="Tahoma"><b>From:</b> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>
[mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <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><div class="h5">
<div></div>
<div>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-family:Arial;font-size:10pt">Greetings Esteemed
Wrenches,</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-family:Arial;font-size:10pt"> </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.</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-family:Arial;font-size:10pt"> </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
Arkansas
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.</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-family:Arial;font-size:10pt"> </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.</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-family:Arial;font-size:10pt"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-family:Arial;font-size:10pt">Best,</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-family:Arial;font-size:10pt"> </span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-family:Arial;font-size:10pt">Travis
Creswell</span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span style="font-family:Arial;font-size:10pt">Ozark Energy
Services</span></font></p></div></div></div></div>
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