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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;line-height:115%;color:black'>I downloaded the spec sheets on the DC generator, it’s either LP or natural gas. Also it’s regulated to 26 volts or 52 volts, so it’s about useless to charge batteries in an off grid system, unless you just need to feed power to the battery bank.<o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;line-height:115%;color:black'>Bob Ellison<o:p></o:p></span></font></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><b><font size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;font-weight:bold'>From:</span></font></b><font size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:bold'>On Behalf Of </span></b>Ray Walters<br><b><span style='font-weight:bold'>Sent:</span></b> Friday, October 21, 2011 7:41 PM<br><b><span style='font-weight:bold'>To:</span></b> RE-wrenches<br><b><span style='font-weight:bold'>Subject:</span></b> Re: [RE-wrenches] Three-phase off-grid<o:p></o:p></span></font></p></div></div><p class=MsoNormal><font size=2 color=black face=Calibri><span style='font-size:11.0pt;line-height:115%'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 color=black face=Calibri><span style='font-size:11.0pt;line-height:115%'>HI Allan;<br><br>I haven't tried the large Exeltech inverters, but I could see some advantages to having a separate charging system, and keeping the inverters supplying stable power. Everytime a generator coughs or switches from one source to another, it seems to cause trouble. The generator could be sized smaller, since it wouldn't need any surge capability. It would always run the same charger, and the inverters would always run the same loads. I'd at least take another look at it for my next large project, but cost might be a limiting factor.<br>Here's a Cummins diesel DC generator, just to think about: <a href="http://www.cumminspowerproducts.com/DCgensets/Other/10000500.pdf">http://www.cumminspowerproducts.com/DCgensets/Other/10000500.pdf</a><br><br>Ray<br><br>On 10/21/2011 4:56 PM, Gary Willett wrote: <o:p></o:p></span></font></p><p class=MsoNormal style='margin-bottom:12.0pt'><font size=4 color=black face=Calibri><span style='font-size:13.5pt;line-height:115%'>Alan: Thanks for setting me straight about 3-phasing the Outback Radian - I was not aware they are limited to parallel single phase applications.</span></font><o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=2 color=black face=Calibri><span style='font-size:11.0pt'>Regards,<br><br>Gary Willett</span><o:p></o:p></font></p></div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br>On 10/21/2011 15:29, Allan Sindelar wrote: <o:p></o:p></span></font></p><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Gary,<br>I was surprised by this information, as I had presumed that both units were for single-phase only. So I checked.<br><br>Mary Raub in tech support at Outback told me that the Radian works only in 120/240 single-phase, although they are stackable in parallel.<br><br>Someone in Schneider tech support told me that the XW can be used in three-phase, up to six units (36 kW). Setup instructions are in Appendix D of the XW installation guide, found online at <a href="http://www.global-download.schneider-electric.com/85257849002EB8CB/all/5CC689CC3CB7FD10852578BF005EA759/$File/xw-hybrid-inverter-charger_installation-guide%28975-0239-01-01_rev-e%29.pdf">http://www.global-download.schneider-electric.com/85257849002EB8CB/all/5CC689CC3CB7FD10852578BF005EA759/$File/xw-hybrid-inverter-charger_installation-guide%28975-0239-01-01_rev-e%29.pdf</a>.<br><br>Thanks, Allan<br> <o:p></o:p></span></font></p><div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><b><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif";font-weight:bold'>Allan Sindelar</span></font></b><font size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br></span></font><font size=2 face="Times New Roman"><span style='font-size:10.0pt;font-family:"Times New Roman","serif"'><a href="mailto:Allan@positiveenergysolar.com"><font color="#000099"><span style='color:#000099'>Allan@positiveenergysolar.com</span></font></a></span></font><font size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br></span></font><font size=2 face="Times New Roman"><span style='font-size:10.0pt;font-family:"Times New Roman","serif"'>NABCEP Certified Photovoltaic Installer<br>NABCEP Certified Technical Sales Professional<br>New Mexico EE98J Journeyman Electrician<br><b><span style='font-weight:bold'>Positive Energy, Inc.</span></b><br>3201 Calle Marie<br>Santa Fe, New Mexico 87507<br><b><span style='font-weight:bold'>505 424-1112</span></b><br><a href="http://www.positiveenergysolar.com/" target="_blank">www.positiveenergysolar.com</a></span></font><font size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></font></p></div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br>On 10/21/2011 2:01 PM, Gary Willett wrote: <o:p></o:p></span></font></p><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=4 color=black face="Times New Roman"><span style='font-size:13.5pt;font-family:"Times New Roman","serif"'>Allan:<br>Also, you might consider using six to nine Schneider/Xantrex XW6048 inverters, or six to nine Outback Radian GS8048 inverters, in a 3-phase configuration, with a common battery bank.<br>Also, Schneider/Xantrex has an 80A 600V charge controller that may be advantageous depending on the distance from the PV arrays to the inverters.</span></font><font size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></font></p><div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=2 color=black face=Calibri><span style='font-size:11.0pt'>Regards,<br>Gary Willett, PE<br>Icarus-Engineering LLC<o:p></o:p></span></font></p><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=2 color=black face=Calibri><span style='font-size:11.0pt'>Icarus Solar Services LLC<o:p></o:p></span></font></p></div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br>On 10/21/2011 10:17, Allan Sindelar wrote: <o:p></o:p></span></font></p><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Wrenches,<br>We have been asked for a design for an off-grid system to reduce generator runtime for a mountain resort. Initial projections (consumption measurement results not yet available) suggest 15-20 kW of PV and around 30 kW of inverter capacity. However, the generators and existing wiring are three-phase 120/208.<br><br>My assumption is that our only options are a set of six Sunny Islands, or 9-12 Outback GVFX3648s. Are there any other options or approaches that I'm missing?<br><br>Thank you, Allan<o:p></o:p></span></font></p><div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>-- <br><b><span style='font-weight:bold'>Allan Sindelar</span></b><br></span></font><font size=2 face="Times New Roman"><span style='font-size:10.0pt;font-family:"Times New Roman","serif"'><a href="mailto:Allan@positiveenergysolar.com"><font color="#000099"><span style='color:#000099'>Allan@positiveenergysolar.com</span></font></a></span></font><font size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br></span></font><font size=2 face="Times New Roman"><span style='font-size:10.0pt;font-family:"Times New Roman","serif"'>NABCEP Certified Photovoltaic Installer<br>NABCEP Certified Technical Sales Professional<br>New Mexico EE98J Journeyman Electrician<br><b><span style='font-weight:bold'>Positive Energy, Inc.</span></b><br>3201 Calle Marie<br>Santa Fe, New Mexico 87507<br><b><span style='font-weight:bold'>505 424-1112</span></b><br><a href="http://www.positiveenergysolar.com/" target="_blank">www.positiveenergysolar.com</a></span></font><font size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></font></p><p class=MsoNormal style='margin-right:722.25pt'><font size=2 color=black face=Calibri><span style='font-size:11.0pt;line-height:115%'><o:p> </o:p></span></font></p></div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br><br><o:p></o:p></span></font></p><pre><font size=2 color=black face="Courier New"><span 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