<div dir="ltr">If you are doing it on the AC side, a Generac transfer switch has the capability and is designed to do this. It's easy to rig an interface as I discussed privately with Bill.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Nov 29, 2019 at 1:29 AM Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com">jerrysgarage01@gmail.com</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="ltr"><div>Wrenches</div><div>Need to be careful here to use something that has the interrupt KVA rating required to prevent an arc in the event of an under load opening with the switch proper AIC rating 10,000 or more, last thing I think you want is to have that kind of liability on products that are not designed for that type of use. But thats just me.</div><div>NABCEP PV Inspector</div><div>California Solar contractor</div><div>Jerry<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 25, 2019 at 8:52 PM Bill Hennessy <<a href="mailto:bill@berkssolar.com" target="_blank">bill@berkssolar.com</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><div style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:16px"><div><div dir="ltr">hi folks--</div><div dir="ltr"><br></div><div dir="ltr">We're installing a grid-tied, battery backup system on a farm where the service entrance is on a pole in the yard. At the single-phase, 240v, service entrance, there are two main breaker subpanels--one going to the house and one to the barn. The buildings are each about 100 feet away from the pole in opposite directions. The PV/battery system is located in the barn. When utility power is lost and the battery backup kicks in, we are looking for a way to bypass the house subpanel at the pole so it won't backfeed the grid. <br></div><div dir="ltr"><br></div><div dir="ltr">When the grid drops out, we need to tie the backup power coming from the barn to the line going to the house. We're thinking an automatic transfer switch installed at the pole will do the job, but the transfer switches seem to have built in delays to work with starting a generator. <span><span>The switch does not have to be service entrance rated.</span></span><br></div><div dir="ltr"><br></div><div dir="ltr">It looks like the Asco 300 series has time delay adjustments, but it is pricey and has a seven-week lead time. (Thank-you PG&E)<br></div><div dir="ltr"><br></div><div dir="ltr"><span>The battery backup system will switch over in milliseconds and we were
hoping to find something similar for the transfer operation at the pole. </span>We're looking for something simple--hopefully a basic transfer switch that will quickly switch and drop out when grid power is restored.</div><div dir="ltr"><br></div><div dir="ltr">Would appreciate any thoughts or suggestions. <br></div><div dir="ltr"><br></div><div dir="ltr"> regards, bill</div><div><br></div><div><div>Bill Hennessy<br>Berks Solar, LLC<br>371 Centennial Rd<br>Mertztown, PA 19539<br><br>o 610 682 4300<br>c 484 560 4666<br>NABCEP certified installer<br>PA contractor #44411<br><a href="http://www.berkssolar.com" target="_blank">www.berkssolar.com</a></div></div></div></div></div>_______________________________________________<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div dir="ltr"><font color="#666666">Chris Mason</font></div><div dir="ltr"><div><span style="font-size:13px"><font color="#666666">Solar systems designer</font></span></div><div><span style="font-size:13px"><font color="#666666">Generac Generators Industrial technician</font></span></div><div><font color="#666666"><br></font></div><div><font color="#666666">Comet Systems Ltd DBA Comet Solar<br>Anguilla Cell 264.235.5670</font></div><div>WhatsApp <span style="color:rgb(102,102,102)">264.235.5670</span></div><div><font color="#666666">Skype: netconcepts</font></div><div><font color="#666666"><a href="http://www.cometenergysystems.com/" target="_blank">www.cometsolar.com</a></font></div></div></div></div>