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<p>I second that. <br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 5/6/21 10:33 AM, Dave Angelini
Offgrid Solar wrote:<br>
</div>
<blockquote type="cite"
cite="mid:aa189c8c14b31d9265382598f3a3887e@127.0.0.1">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<p>I would not do any of this for an offgrid client. It is against
the rule of less is more. The whole design is flawed in my
opinion.</p>
<div>
<pre> </pre>
<pre><strong><span style="font-size: small;">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" target="_blank" moz-do-not-send="true">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" moz-do-not-send="true">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
</div>
<p>On Tue, 4 May 2021 19:24:13 -0400, Dave Tedeyan
<a class="moz-txt-link-rfc2396E" href="mailto:dave@sungineersolar.com"><dave@sungineersolar.com></a> wrote:</p>
<blockquote type="cite" style="padding-left:5px;
border-left:#1010ff 2px solid; margin-left:5px; width:100%"><!-- html ignored --><!-- head ignored --><!-- meta ignored -->
<div dir="auto">I suppose the question here is - which is the
worse failure mode?
<div dir="auto">A. Solar turning off until an electrician can
fix it.</div>
<div dir="auto">OR</div>
<div dir="auto">B. Not knowing the contactor failed until it
does not open when the generator turns on and running the
risk that the solar backfeeds the generator and breaks it.</div>
<div dir="auto"> </div>
<div dir="auto">For off-grid maybe A would be more of a
concern. But for grid tied, I would think option B would be
worse.</div>
<div dir="auto"> </div>
<div dir="auto">Does anyone have a fail safe method of doing
this?</div>
<div dir="auto"> </div>
<div dir="auto">Cheers,</div>
<div dir="auto">Dave</div>
</div>
<br>
<div class="gmail_quote">
<div class="gmail_attr" dir="ltr">On Tue, May 4, 2021, 4:41 PM
Chris Schaefer <<a href="mailto:chris@solarandwindfx.com"
moz-do-not-send="true">chris@solarandwindfx.com</a>>
wrote:</div>
<blockquote class="gmail_quote" style="margin: 0 0 0 .8ex;
border-left: 1px #ccc solid; padding-left: 1ex;">
<div dir="ltr">Jason,
<div> </div>
<div>A valid concern which is why I always wire them as
powered open so if there is a failure it would
transition closed or not open.</div>
<div> </div>
<div>Christopher</div>
</div>
<br>
<div class="gmail_quote">
<div class="gmail_attr" dir="ltr">On Tue, May 4, 2021 at
4:15 PM Jason Szumlanski <<a
href="mailto:jason@floridasolardesigngroup.com"
moz-do-not-send="true">jason@floridasolardesigngroup.com</a>>
wrote:</div>
<blockquote class="gmail_quote" style="margin: 0px 0px 0px
0.8ex; border-left: 1px solid #cccccc; padding-left:
1ex;">
<div dir="auto">
<div>What happens when the contactor fails? I don't
trust a NC contactor that is supposed to open on
240Vac coil voltage from the generator. It's not a
failsafe solution.
<div dir="auto"> </div>
<div dir="auto">Jason</div>
<div dir="auto"> </div>
<br>
<br>
<div class="gmail_quote">
<div class="gmail_attr" dir="ltr">On Tue, May 4,
2021, 3:15 PM Drake <<a
href="mailto:drake.chamberlin@redwoodalliance.org"
moz-do-not-send="true">drake.chamberlin@redwoodalliance.org</a>>
wrote:</div>
<blockquote class="gmail_quote" style="margin: 0px
0px 0px 0.8ex; border-left: 1px solid #cccccc;
padding-left: 1ex;">
<div>P.S. The contactor method is even mentioned
somewhere in the Outback literature. I've been
using it for years. It is very simple and
requires no complex equipment. It will not
interfere with rapid shutdown. 40 A, 240 V
contactors with 240 V coils are readily
available and not terribly expensive. The 240
V output of the generator circuit provides the
signal. <br>
<br>
At 10:02 AM 5/4/2021, you wrote:<br>
<blockquote type="cite"
style="padding-left:5px; border-left:#1010ff
2px solid; margin-left:5px; width:100%">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. <br>
<br>
---<br>
<br>
<br>
<br>
On 2021-05-03 10:26, Dave Tedeyan wrote:<br>
<blockquote type="cite"
style="padding-left:5px;
border-left:#1010ff 2px solid;
margin-left:5px; width:100%">Hi All, <br>
<br>
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.<br>
<br>
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.<br>
<br>
Cheers, <br>
Dave<br>
<br>
-- <br>
<strong>Dave Tedeyan, PE<br>
</strong> <img alt="Sungineer Solar"
moz-do-not-send="true" width="200"
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1653 Slaterville Road, Ithaca, NY 14850<br>
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-- <br>
<div dir="ltr">
<div dir="ltr">
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<div dir="ltr">
<div dir="ltr">
<p style="text-align: center;"><span
style="font-size: 10pt; color: #1f497d;"><span
style="font-family: Arial, sans-serif;">Chris
Schaefer's<br>
</span></span><a style="font-size: 12.8px;"
href="http:www.solarandwindfx.com"
moz-do-not-send="true"><img style="color:
#1f497d; font-family: Arial,sans-serif;
font-size: 10pt;"
src="cid:part36.1D4A8018.FB831CCC@solarray.com"
alt="" class="" width="200" height="40"></a><br>
<em><span style="font-family:
Arial,sans-serif; color: #1f497d;"><span
style="font-size: 9pt;">Tel/Fax
585-229-2083 or Cell 585-748-1870 </span><span
style="font-size: 12px;"><br>
</span></span></em><em style="font-size:
12.8px;"><span style="font-size: 10pt;"><span
style="color: #1f497d;"><span
style="font-family: Arial,
sans-serif;">5115 South Hill Road ~
Canandaigua New York 14424<br>
</span></span></span></em><em
style="font-size: 12.8px;"><span
style="font-size: 10pt; font-family:
Arial,sans-serif; color: #1f497d;"><a
href="http://www.solarandwindfx.com"
moz-do-not-send="true"><span
style="color: blue;">www.solarandwindfx.com</span></a>
~ E-mail: <span style="color: blue;"><a
href="mailto:chris@solarandwindfx.com"
moz-do-not-send="true">chris@solarandwindfx.com</a></span></span></em></p>
<p style="text-align: center;"><em><span
style="font-size: 10pt; font-family:
Arial,sans-serif; color: #1f497d;"><img
src="cid:part36.1D4A8018.FB831CCC@solarray.com"
alt="" class="" width="200" height="56"><br>
</span></em></p>
<p style="text-align: center;"><span
style="font-size: 10pt; font-family:
Arial,sans-serif; color: black;">Thomas
Jefferson, the author of our great
Constitution, once said, "democracy" will
cease to exist when you take away from those
who are willing to work and give to those
who would not."</span><span
style="font-size: 10pt; font-family:
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