<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>We have a couple of off-grid systems (not SolArk) where we put a Dwyer current sensing relay on the output from the generator, energizing a Gigavac, DC relay that opens the combined PV output circuit and it works well.<o:p></o:p></p><p class=MsoNormal>Not exactly what you are looking for, but the principal would be the same.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-Glenn<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org> <b>On Behalf Of </b>Dave Tedeyan<br><b>Sent:</b> Monday, May 03, 2021 10:27 AM<br><b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b>Subject:</b> [RE-wrenches] Generator and AC coupling on a Sol-Ark<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hi All, <o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>I am planning on using a Sol-Ark for the first time for adding battery backup to an existing system. It is Enphase, so clearly it will be AC coupled, and there is a whole house generator. When I talked to Sol-Ark about it, they recommended putting the generator on a time of use schedule to not allow it to come on during the day so that we don't run into the issue of the solar backfeeding the generator.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I was wondering though if anyone has just used a contactor to cut out the solar when the generator turns on? Something like Outback's GS-AC-Gen-Kit, although in this case I will need something rated for just over 30A. This seems like a better way to allow the generator to run at any time it is needed, especially if it is a gloomy, snowy, winter day.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Cheers, <o:p></o:p></p></div><div><p class=MsoNormal>Dave<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><div><div><div><p class=MsoNormal><b><span style='color:#888888'>Dave Tedeyan, PE</span></b><span style='color:#888888'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:#888888'><img width=200 height=50 style='width:2.0833in;height:.525in' id="_x0000_i1025" src="http://sungineersolar.com/wp-content/uploads/2019/08/Sungineer-Logo-1.png" alt="Sungineer Solar"></span><span style='color:#888888'><o:p></o:p></span></p><div><p class=MsoNormal><span style='color:#888888'>1653 Slaterville Road, Ithaca, NY 14850<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:#888888'>Cell: 607-288-2898<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:#888888'><a href="http://www.sungineersolar.com/" target="_blank"><span style='color:#1155CC'>www.sungineersolar.com</span></a><o:p></o:p></span></p></div></div></div></div></div></div></div></div></body></html>