<p dir="ltr">Wrenches<br>
My best solution is connect the pv unstream of the tranfer switch, if that is not an option install a contactor in the pv AC side output and connect that upstream of the genny, you can also connect the supply power to the genny side. Either way you look at dont let the PV and genny play together.<br>
Jerry</p>
<div class="gmail_quote">On Feb 5, 2016 8:33 AM, "Daniel Tittmann" <<a href="mailto:daniel@greenwired.com">daniel@greenwired.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Esteemed colleagues-<div><br></div><div>We are finding more and more clients with existing utility back up generators that are wanting grid inter tied solar systems. Many of these clients are not willing to go the extra mile to interface the solar system with the back up gen. I am wondering if any of you out there have found simple fail safe solutions for preventing generator back feed when relays and switch gear are difficult or impossible to implement. </div><div><br></div><div> I have been thinking perhaps a large enough diode on the gen output could do it, but then what happens to the grid tied inverter when there is no where for the power to go?</div><div><br></div><div>I know this is vague, but I am searching the hive to see if there is a better way to make these customers happy and make the sale.</div><div><br></div><div>Thanks</div><div>Daniel</div><div><br><div><br clear="all"><div><div><div dir="ltr">Daniel Tittmann <div>CTO</div><div>Greenwired</div><div><a href="http://www.greenwired.com" target="_blank">www.greenwired.com</a></div><div><a href="mailto:daniel@greenwired.com" target="_blank">daniel@greenwired.com</a></div><div><a href="tel:707-923-2001" value="+17079232001" target="_blank">707-923-2001</a> (office)</div><div><a href="tel:707-206-5088" value="+17072065088" target="_blank">707-206-5088</a> (Cell)</div></div></div></div>
</div></div></div>
<br>_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" rel="noreferrer" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" rel="noreferrer" target="_blank">www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" rel="noreferrer" target="_blank">www.members.re-wrenches.org</a><br>
<br>
<br></blockquote></div>