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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:"Calibri","sans-serif";color:#1F497D'>Dan, I think it is Gree that has a PV direct mini-split heat pump for both heating and air conditioning. It may have run on two 250 watt modules. When in non-PV mode, I believe the AC is rectified to DC and run through an inverter. And there are now a few others as well….possibly Fujitsu.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Bill Dorsett<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Manhattan, KS<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><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>Dan Fink<br><b>Sent:</b> Wednesday, March 09, 2016 8:07 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] PV-direct air heating?<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>I have an interesting question I haven't run into before, using existing equipment, some in place, some just waiting for an install.<o:p></o:p></p><div><p class=MsoNormal>Has anyone here ever done an MPPT PV-direct install to DC air heaters? <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Advanced Energy used to have a PV-direct MPPT water heating controller, but the residential division of their company no longer exists. We are looking at 1200-1500 watts of PV.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>How would one program a Midnite Classic (for example) to most efficiently connect PV to DC heating elements without a battery bank/diversion load setup, whether for water or air?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>This one's new to me; I've never tried PV direct heating before.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks in advance for any input.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><div><div><div><div><div><div><div><div><div><div><div><p class=MsoNormal><span style='font-size:9.5pt'>Dan Fink</span><o:p></o:p></p><div><p class=MsoNormal><span style='font-size:9.5pt'>Adjunct Professor of Solar Energy Technology, Ecotech Institute<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'>IREC Certified Instructor™ for: <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'>~ PV Installation Professional<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'>~ Small Wind Installer<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'>Executive Director, Buckville Energy<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'>NABCEP Registered Continuing Education Providers™<br><a href="tel:970.672.4342" target="_blank"><span style='color:#1155CC'>970.672.4342</span></a><o:p></o:p></span></p></div><p class=MsoNormal><br> <o:p></o:p></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></body></html>