<div dir="auto">There is a company called Savant, I’ve seen their individual Smart breakers installed in sqd Panels - they are individual smart breakers. A single pole breaker would actually take up two slots one for the OCPD itself, and one for the sp relay. Don’t know exactly how it operates, but I know you don’t have to buy an entire smart panel for it to work.</div><div dir="auto"><br></div><div dir="auto">As discussed on this forum, also, there are also RF transmitter/ receivers, which can do what you ask. Used them to disconnect an inverter from a common AC bus when the gennie turns on.</div><div dir="auto"><br clear="all"><br clear="all"><div dir="auto"><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><p></p><p class="MsoNormal" style="font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt;color:rgb(0,0,0)"><a name="SignatureSanitizer__MailAutoSig" style="font-size:10pt;font-family:Arial"><b style="font-family:Arial"><img width="96" height="72" src="https://ci3.googleusercontent.com/mail-sig/AIorK4zIGox3hmaGW8StlnANQvRdXBrTEgpee6ZmV_8h-pfWcEl7lwlqfhSqd2PgPh89cgzwpzfUzuuIGxKE" style="font-family: Arial;"><br></b></a></p><p class="MsoNormal" style="font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt;color:rgb(0,0,0)"><a name="SignatureSanitizer__MailAutoSig" style="font-size:10pt;font-family:Arial"><b style="font-family:Arial">Kirk Herander / </b></a><b style="font-size:10pt;font-family:Arial"><a href="mailto:kirkh@vermont.solar" title="Send an email to kirkh@vermont.solar; Send an email to kirkh@vermont.solar" style="font-family:Arial;color:blue" target="_blank">kirkh@vermont.solar</a></b></p><p class="MsoNormal" style="font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt;color:rgb(0,0,0)"><span style="font-size:10pt;font-family:Arial"><b style="font-family:Arial">Owner|Principal, VT Solar, LLC</b></span></p><p class="MsoNormal" style="font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt;color:rgb(0,0,0)"><span style="font-size:10pt;font-family:Arial"><b style="font-family:Arial"><i style="font-family:Arial">Celebrating our 34<sup style="font-family:Arial">st</sup> Anniversary 1991-2025!!</i></b></span></p><p class="MsoNormal" style="font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt;color:rgb(0,0,0)"><span style="font-size:10pt;font-family:Arial">dba Vermont Solar Engineering</span><br></p><p class="MsoNormal" style="font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt;color:rgb(0,0,0)"><span style="font-size:10pt;font-family:Arial">802.559.1225</span></p></div></div></div></div><div><br></div><div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Fri, Aug 22, 2025 at 8:21 PM Chris Sparadeo 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-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="auto">Hi Chris,</div><div dir="auto"><br></div><div dir="auto">I’m wondering if a load management device like this could be helpful? However, it does not discern between grid presence and island mode, so it might not fit the bill. </div><div dir="auto"><br></div><div dir="auto"><div><a href="https://www.getstepwise.com/product?gad_source=1&gad_campaignid=22363404421&gclid=Cj0KCQjwqqDFBhDhARIsAIHTlkub687mJZYb6g0nIR33X1eA2FVY3bMc_zBxMr44IEl5a7QenVljhUgaArKeEALw_wcB" target="_blank">https://www.getstepwise.com/product?gad_source=1&gad_campaignid=22363404421&gclid=Cj0KCQjwqqDFBhDhARIsAIHTlkub687mJZYb6g0nIR33X1eA2FVY3bMc_zBxMr44IEl5a7QenVljhUgaArKeEALw_wcB</a></div><br></div><div dir="auto">Quick caveat that shedding an HVAC unit potentially mid cycle is not ideal for the health of that unit…but neither is an overload and subsequent power failure. </div><div dir="auto"><br></div><div dir="auto">I do know that Lumin Smart sells remote CTs for grid detection. Might be worth a call to them to see if this fairly inexpensive product can pair with a remote contactor to open the HVAC circuit. </div><div dir="auto"><br></div><div dir="auto">Best of luck! </div><div dir="auto"><br></div><div dir="auto">-Chris </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Aug 22, 2025 at 3:54 PM Christopher Warfel 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-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">We installed a 4kW Outback multimode system about 8 years ago. An <br>
electrician came in afterwards and installed 3 heat pumps on the battery <br>
backed up power panels. The Outback inverter disconnected on load every <br>
time there was a power outage. The electrician really messed up and is <br>
long gone. Also found out did not pull a permit. But I digress. We <br>
managed to move two of the heat pump circuit breakers to the utility <br>
panel, so no longer on the battery backed up power panels. The third <br>
heat pump is the problem as it is located in an apartment building <br>
remote from the main house. The whole apartment subpanel, including the <br>
heat pump load is interconnected to the "main" battery backed up power <br>
panel in the home.<br>
<br>
A master electrician and I are considering how to shed the apartment <br>
heat pump in a power outage. We cannot easily run a separate circuit to <br>
the apartment building to pick up this load. We have considered a smart <br>
panel, but the cost seems high for one circuit. Does anyone know of a <br>
power line product of RF product or similar that could operate this <br>
breaker when the main service panel loses power? I have been <br>
unsuccessful over months of sporadic research.<br>
<br>
Thanks in advance.<br>
<br>
<br>
Chris<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
-- Christopher Warfel, PE ENTECH Engineering, Inc. PO Box 871, Block <br>
Island, RI 02807 (401) 447-5773<br>
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