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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>I have 2 Array Tech trackers at my house in a narrow N-S canyon.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>From comparisons I have done with a fixed tilt VS Wattsun arrays I determined repeatedly that a 32% yearly average gain was achieved, esp. in winter months. [6 \u2013 250 watt modules on each]<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>That said \u2013 with today\u2019s cost of modules, more modules are less expensive if you have the footprint to set them. I did not have the room for ground or roof mount or for 3 poles and 2 pole mounted trackers fit the bill.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>Another issue that the trackers resolved, was our county has reflection ordinances & the trackers alleviated this issue!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>Single axis VS dual axis?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>I have dual axis trackers and to be able to park the tracker at the end of the day in full vertical mode reduces the snow pile up overnight in the winter. In the summer when we get a lot of wind gusts at night being able to park the tracker at night in flat [tabletop] mode is desirable.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>Location, location, location; Trackers work in snow country probably better than non-snow country due to their additional benefits. I have installed the large Wattsun trackers as locked in single axis to reduce the potential damage from wind on some sites.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>The new Wattsun controllers initially were not the easiest item to program but they have worked flawlessly, I give them 2 thumbs up.<o:p></o:p></span></p><div style='mso-element:para-border-div;border:none;border-bottom:solid windowtext 1.5pt;padding:0in 0in 1.0pt 0in'><p class=MsoNormal style='border:none;padding:0in'><span style='font-family:"Century Gothic",sans-serif;color:#002060'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-family:"Century Gothic",sans-serif;color:#002060'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>Dana Orzel Great Solar Works, Inc. <o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>C - 208.721.7003 dana@solarwork.com<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>Idaho Contractor - # 028765 Idaho PV # 028374<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>NABCEP # 051112-136 <a href="http://www.solarwork.com"><span style='color:blue'>www.solarwork.com</span></a><o:p></o:p></span></p><p class=MsoNormal><u><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'>"Responsible Technologies for Responsible People since 1988" </span></u><u><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'><o:p></o:p></span></u></p><p class=MsoNormal style='background:white'><b><span style='font-size:18.0pt;font-family:Webdings;color:green'>P</span></b><span style='font-family:"Helvetica",sans-serif;color:navy'> </span><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:green'>Please consider the environment before printing this email.</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic",sans-serif;color:black'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org> <b>On Behalf Of </b>Dave Angelini Offgrid Solar<br><b>Sent:</b> Monday, December 02, 2019 9:41 AM<br><b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b>Subject:</b> Re: [RE-wrenches] non-sensor based tracker controller<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p style='margin-left:.5in'>Mac, which mode is being confused elevation or azimuth. What have you replaced and what does Jeff Grulic say of Wattsun?<o:p></o:p></p><p style='margin-left:.5in'>The photo sensor I like is the single axis. There really is little need to use the dual axis for offgrid, in my opinion.<o:p></o:p></p><pre style='margin-left:.5in'><strong><span style='font-family:"Courier New"'>Dave Angelini Offgrid Solar<o:p></o:p></span></strong></pre><pre style='margin-left:.5in'><strong><span style='font-family:"Courier New"'>"we go where powerlines don't"<o:p></o:p></span></strong></pre><pre style='margin-left:.5in'><strong><span style='font-family:"Courier New"'><a href="http://members.sti.net/offgridsolar/" target="_blank">http://members.sti.net/offgridsolar/</a><o:p></o:p></span></strong></pre><pre style='margin-left:.5in'><strong><span style='font-family:"Courier New"'>e-mail <a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a><o:p></o:p></span></strong></pre><pre style='margin-left:.5in'><strong><span style='font-family:"Courier New"'>text 209 813 0060</span></strong><o:p></o:p></pre><p style='margin-left:.5in'>On Mon, 2 Dec 2019 07:28:29 -0700, Mac Lewis <<a href="mailto:maclewis1@gmail.com">maclewis1@gmail.com</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #1010FF 1.5pt;padding:0in 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal style='margin-left:.5in'>Hi Wrenches, <o:p></o:p></p><div><p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'>Does anyone know of a non-sensor based tracker controller that can work with a variety of tracker motors?<o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'>We don't do trackers much but we have a WattSun DuraTrak controller that has never worked well, we've tried all sorts of tweaks. Its a tougher location that a lot because there are high snowy peaks that confuse the tracker I guess.<o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'>It seems like something would be out there that would just use the sun position equation instead of sensors that can be confused.<o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'>Thanks for your input<br clear=all><o:p></o:p></p><div><p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p></div><p class=MsoNormal style='margin-left:.5in'>-- <o:p></o:p></p><div><div><p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Times New Roman",serif;color:#305A78'> </span><o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;margin-left:.5in'>Mac Lewis<o:p></o:p></p><p style='margin-left:.5in'><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#305A78'>"Yo solo sé que no sé nada." </span><b><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#686868'>-Sócrates</span></b><o:p></o:p></p></div></div></div></blockquote><div><p class=MsoNormal style='margin-left:.5in'>-- <o:p></o:p></p><pre style='margin-left:.5in'> <o:p></o:p></pre><pre style='margin-left:.5in'> <o:p></o:p></pre></div></div></body></html>