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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#000000" vlink="#000000"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Todd,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Yep, I did catch that this morning.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dave<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> RE-wrenches [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>toddcory@finestplanet.com<br><b>Sent:</b> Monday, December 15, 2014 12:09 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] RE; SW4024's were off grid, now on grid AC2 Controls?<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p style='margin:0in;margin-bottom:.0001pt'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>also, ac1 is grid and ac2 is gen.<o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt;word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt;word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>todd<o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt;word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt;word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt;word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.25in;margin-left:0in;word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><br><br>On Monday, December 15, 2014 8:03am, "Ray Walters" <<a href="mailto:ray@solarray.com">ray@solarray.com</a>> said:<o:p></o:p></span></p><div><div><div><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>What you want is already programmed into the inverter. It's called Low Battery Transfer mode (LBX), its just a program setting on the inverter. You select this mode in Menu 9, and then its actual battery voltage settings are in Menu 16.<br>It will not sell back in this mode, but fromHome Power Magazine's Guerrilla Solar movement of the 90s, all you have to do to sell back: "Don't ask, Don't Tell, just press Sell".<o:p></o:p></span></p><p class=moz-signature style='margin:0in;margin-bottom:.0001pt'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>R.Ray Walters CTO, Solarray, Inc Nabcep Certified PV Installer, Licensed Master Electrician Solar Design Engineer 303 505-8760<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>On 12/15/2014 8:09 AM, Daniel Young wrote:<o:p></o:p></span></p></div></div></div><div id=SafeStyles1418663301><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Arial","sans-serif";color:#1F497D'>The way I would do this if using outback (really what I’m familiar with) is to set up the aux relay on the inverter to trigger an AC relay that connected the grid to the inverters ac input using the “load shed” function. It would trigger the relay when the batteries reached a set voltage (user programmable in the outback), then disconnect the grid at higher set voltage. Ex: activate relay at 46V, then de-activate relay at 50V (48V system). All you are basically doing is activating a charging source instead of severing a load to help the battery state of charge. Not sure how the trace handles AC1 and AC2, so maybe you’d need a second relay to make sure the generator input is always off when the grid input is active.</span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif";color:#1F497D'> </span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Not sure if the trace has this functionality. Hope this applies, or helps get you down the right path.</span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif";color:#1F497D'> </span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><div><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif";color:#1F497D'>With Regards,</span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif";color:#1F497D'> </span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Daniel Young, </span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif";color:#1F497D'>NABCEP Certified PV Installation Professional<sup>TM</sup>: Cert #031508-90</span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif";color:#1F497D'>NABCEP Certified Solar Heating Installer<sup>TM</sup>: Cert #SH031409-13</span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='word-wrap: break-word'><strong><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></strong><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> RE-wrenches [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org"><u><span style='color:blue'>mailto:re-wrenches-bounces@lists.re-wrenches.org</span></u></a>] <strong><span style='font-family:"Tahoma","sans-serif"'>On Behalf Of </span></strong>Dave<br><strong><span style='font-family:"Tahoma","sans-serif"'>Sent:</span></strong> Sunday, December 14, 2014 8:10 PM<br><strong><span style='font-family:"Tahoma","sans-serif"'>To:</span></strong> 'RE-wrenches'<br><strong><span style='font-family:"Tahoma","sans-serif"'>Subject:</span></strong> [RE-wrenches] RE; SW4024's were off grid, now on grid AC2 Controls?</span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div></div><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>Here is a request for advice from one of my old off grid customers who has recently brought in the grid to lessen his dependence on the generator. He is NOT selling back to the grid.<o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>The main question I have is this: Can we program the Trace SW4024 so that that it will charge the batteries with Grid Power (AC2) when a low voltage setting is reached?<o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><< "<em><span style='font-family:"Arial","sans-serif"'>I have two SW4024 inverters. They are set up to each handle about 1/2 of the loads in the house.</span></em><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> </span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>Our system is setup so we are either on Grid power, or battery power. </span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>The choice is controlled by a manual transfer switch.</span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> </span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>AC1 on both inverters is backup generator which is controlled by Inverter #1 when battery voltage reaches preset levels.</span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> </span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>AC2 on both inverters is AC from the grid and is currently controlled by circuit breakers. The circuit breakers are normally in the off position and the batteries are charged by the sun. Typically if we want to charge the batteries a bit with grid power we turn on the circuit breakers and the batteries are charged through both inverters by utility power.</span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> </span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>What I would like to be able to do is set the inverter, probably inverter #1 for consistency, to allow grid charging at a set battery voltage and then cut off the grid when it reaches an upper voltage. My thought is something along the lines of, if the batteries reach 40% of full charge Grid is started and allowed to charge batteries until they reach 80% charge.</span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> </span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>I would like to continue as things are at present with the inverter triggering the back-up generator if needed. Again my thought is at 35% of Full charge Generator is started and is then shut off at 80% of full charge.</span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> </span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>My goal is to use PV juice as much as possible with first backup being Grid and second backup being Generator. This should allow us to go away and hopefully run the house on PV but have two backups if needed"</span></em><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>. >><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>I would appreciate advice from anyone with experience with a system like this.<o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:10.5pt;font-family:Consolas'>Best,</span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:10.5pt;font-family:Consolas'>Dave</span><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>David Palumbo<o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>Independent Power LLC<o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>462 Solar Way Drive<o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>Hyde Park, VT 05655<o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>802-888-7194<o:p></o:p></span></p><p class=MsoNormal style='word-wrap: break-word'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><div class=MsoNormal align=center style='text-align:center'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><hr size=1 width="100%" noshade style='color:#A0A0A0' align=center></span></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>No virus found in this message.<br>Checked by AVG - <a href="http://www.avg.com"><u><span style='color:blue'>www.avg.com</span></u></a><br>Version: 2012.0.2249 / Virus Database: 4235/8239 - Release Date: 12/15/14<span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:.25in'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p style='margin:0in;margin-bottom:.0001pt'><span style='font-size:18.0pt;font-family:"Arial","sans-serif"'>_______________________________________________ List sponsored by Redwood Alliance List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org"><u><span style='color:blue'>RE-wrenches@lists.re-wrenches.org</span></u></a> Change listserver email address & settings: <a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org"><u><span style='color:blue'>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</span></u></a> List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html"><u><span style='color:blue'>http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</span></u></a> List rules & etiquette: <a href="http://www.re-wrenches.org/etiquette.htm"><u><span style='color:blue'>www.re-wrenches.org/etiquette.htm</span></u></a> Check out or update participant bios: <a href="http://www.members.re-wrenches.org"><u><span style='color:blue'>www.members.re-wrenches.org</span></u></a> <o:p></o:p></span></p></blockquote></div><p class=MsoNormal><br><br><br>Sent from Finest Planet WebMail.<o:p></o:p></p></div></body></html>