<div dir="ltr">You are correct on this. <div><br></div><div>The failure of any control hardware, IO's / relays / contactor logic along the way from generator sense to PV contactor should result in the coupled grid-tie PV inverter disconnected. Which means the contactor at the PV inverter should be energized "closed" (so PV AC connected normally open) under normal operation (genny off, PV on).</div><div><br></div><div>Wired as such, It can be done with off the shelf components, and remotely by adding some <a href="http://controlbyweb.com">controlbyweb.com</a> controllers.</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Oct 11, 2022 at 7:49 PM Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">I'm not a fan of this strategy because it is not failsafe. Contactors fail. When the coil fails to open the contactor, you will have the PV AC coupled with the generator If he normally closed contactor is used in this manner.<div dir="auto"><br></div><div dir="auto">I think the question needs to be the converse: How do you turn the PV on remotely only when the generator is not running.</div><div dir="auto"><br></div><div dir="auto">Jason Szumlanski</div><div dir="auto">Florida Solar Design Group <br><div dir="auto"><br></div><div dir="auto"><br><div dir="auto"><br></div><div dir="auto"><br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Tue, Oct 11, 2022, 2:45 PM Maverick Brown via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">I’ll usually use  a 60 amp contactor with 240Vac coil. <div><br></div><div>The generator powers the coil and opens the Normally Closed contacts disconnecting the grid tie inverter. <br><br><div dir="ltr"><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px"><div>Maverick Brown<br>Off-Grid Solar Commander since 2006<br><b>Maverick Solar Enterprises, Inc.</b></div><div><b> • Solar Commander Remote Power</b></div><div><b> • SunFlow Systems Cathodic Protection <br></b><a href="mailto:maverick@mavericksolar.com" rel="noreferrer" target="_blank">maverick@mavericksolar.com</a><br>512-460-9825</div><div><br></div></div></div><div dir="ltr"><br><blockquote type="cite">On Oct 11, 2022, at 11:26 AM, Kirk Herander via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">Hi,<div dir="auto">I’m looking for suggestions on a remote control 60 amp contactor. It can either be true wireless or send a signal down an AC power line to open / close contact at the other end.</div><div dir="auto"><br></div><div dir="auto">I’m trying to figure out a non-wired way to turn an AC coupled inverter off when the generator is running, as advised by outback and others.</div><div dir="auto"><br></div><div dir="auto">All suggestions welcome thank you.</div>-- <br><div dir="ltr"><div dir="ltr"><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><a name="m_9144401569978060968_m_-1335977791020699789_SignatureSanitizer__MailAutoSig" rel="noreferrer"><b>Kirk Herander / </b></a><b><a href="mailto:kirkh@vermont.solar" title="Send an email to kirkh@vermont.solar; Send an email to kirkh@vermont.solar" style="color:blue" rel="noreferrer" target="_blank">kirkh@vermont.solar</a></b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><b>Owner|Principal, VT Solar, LLC</b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><b><i>Celebrating our 31^st Anniversary 1991-2022!!</i></b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><a href="https://nam02.safelinks.protection.outlook.com/?url=www.vermontsolarnow.com&data=02%7C01%7C%7C9f0330d75a244870112408d685311841%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636842843233477645&sdata=0NjyuKeQbEK6245SNnk8X4XnP9Q%2B%2BqtvcALkdDghvk4%3D&reserved=0" title="Click to open in a new window or tab
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><a name="SignatureSanitizer__MailAutoSig"><b>Kirk Herander / </b></a><b><a href="mailto:kirkh@vermont.solar" title="Send an email to kirkh@vermont.solar; Send an email to kirkh@vermont.solar" style="color:blue" target="_blank">kirkh@vermont.solar</a></b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><b>Owner|Principal, VT Solar, LLC</b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><b><i>Celebrating our 31^st Anniversary 1991-2022!!</i></b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><a href="https://nam02.safelinks.protection.outlook.com/?url=www.vermontsolarnow.com&data=02%7C01%7C%7C9f0330d75a244870112408d685311841%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636842843233477645&sdata=0NjyuKeQbEK6245SNnk8X4XnP9Q%2B%2BqtvcALkdDghvk4%3D&reserved=0" title="Click to open in a new window or tab
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