<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><meta http-equiv="Content-Type" content="text/html charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Have a look at these relay combinations. Relay in a box @ <a href="http://www.functionaldevices.com/" class="">www.functionaldevices.com</a>. Easy install, its what I use to let me know if the grid is connected. T <div class=""><div class=""><br class=""></div><div class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Feb 27, 2025, at 10:08 PM, Corey Shalanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" class="">re-wrenches@lists.re-wrenches.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">Hi Nicholas,</div><div class=""><br class=""></div><div class="">Related to Richard's suggestion, please see the attached diagram. This was posted previously to the message board (back in the early 2010s?)—but, for the life of me, I cannot track down the original message in the archives...</div><div class=""><br class=""></div><div class="">Corey Shalanski</div><div class=""><br class=""></div><br class=""><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Feb 27, 2025 at 11:09 AM Richard Scott <<a href="mailto:cheezemanrich@gmail.com" target="_blank" class="">cheezemanrich@gmail.com</a>> wrote:</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr" class=""><div class="">How about a relay powered by the AC grid with SPDT contact configuration. </div><div class="">Use normally closed contacts to close a circuit turning on a lamp or other device powered off the backup AC power.</div><div class="">When the AC grid goes down, the relay de-energizes and closes the normally closed contacts thereby turning on the indicator device.</div><div class=""><br class=""></div><div class="">Richard</div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Feb 27, 2025 at 9:18 AM Nicholas Ponzio via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" class="">re-wrenches@lists.re-wrenches.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr" class=""><div dir="ltr" class=""><div class="">Dear Esteemed Wrenches,</div><div class=""><br class=""></div><div class="">This issue arises periodically, and I'm hopeful someone in the group has devised a cost-effective, low-power solution.</div><div class=""><br class=""></div><div class="">For a whole-home backup system, how can we best alert homeowners that they are operating on battery power? These homeowners do not use smartphones and won't receive push notifications. Is there a simple solution to activate a single light or audible alarm exclusively when the grid is down? This particular instance involves a FranklinWH system, but the same challenge applies to any battery with a whole-home backup and "instant-on" transfer switch. </div><div class=""><br class=""></div><div class="">Thank you in advance for your insights.</div><div class=""><br class=""></div><div class="">Sincerely,</div><div class="">Nicholas Ponzio </div><div class="">Building Energy</div></div></div></blockquote></div>
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