<div dir="ltr">Dave,<div><br></div><div>My initial background comes from the Industrial Controls world w/ a strong military influence. Given that the generator probably has some kind of transfer switch, chances are that the transfer switch has a dry contact in which can be used to power a relay. I normally use ASCO transfer switches in this manner along with an Allen-Bradley contactor, P/N 400DP50ND3. This has a 120vac coil, 4 poles with a rating of 50 amps. Hope this helps.</div><div><br></div><div>Christopher</div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, May 4, 2021 at 10:44 AM <<a href="mailto:drake.chamberlin@redwoodalliance.org">drake.chamberlin@redwoodalliance.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 style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<div id="gmail-m_-5704456248598502072signature">Get a contactor with a 240 VAC coil. Connect the coil wire wires to the 240 V output circuit of the generator, so when the generator comes on, the contactor opens. Run the current from the AC coupled Enphase inverters through the contacts from common to N/C. </div>
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<p id="gmail-m_-5704456248598502072reply-intro">On 2021-05-03 10:26, Dave Tedeyan wrote:</p>
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<div dir="ltr">Hi All,
<div><br>
<div>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.</div>
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<div>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.</div>
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<div>Cheers, </div>
<div>Dave<br>
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<div dir="ltr" style="color:rgb(136,136,136)"><strong>Dave Tedeyan, PE</strong></div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><p style="text-align:center"><span style="font-size:10pt;color:rgb(31,73,125)"><font face="Arial, sans-serif">Chris Schaefer\u2019s<br></font></span><a href="http:www.solarandwindfx.com" style="font-size:12.8px" target="_blank"><img src="http://www.solarandwindfx.com/wp-content/uploads/2015/01/Solar-Wind-FX-Logo.png" width="200" height="40" style="color: rgb(31, 73, 125); font-family: Arial, sans-serif; font-size: 10pt;"></a><br><i><span style="font-family:Arial,sans-serif;color:rgb(31,73,125)"><span style="font-size:9pt">Tel/Fax
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