<div dir="ltr"><div>Hi Nicholas,</div><div><br></div><div>Related to Richard's suggestion, please see the attached diagram. This was posted previously to the message board (back in the early 2010s?)\u2014but, for the life of me, I cannot track down the original message in the archives...</div><div><br></div><div>Corey Shalanski</div><div><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Feb 27, 2025 at 11:09\u202fAM Richard Scott <<a href="mailto:cheezemanrich@gmail.com" target="_blank">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"><div>How about a relay powered by the AC grid with SPDT contact configuration. </div><div>Use normally closed contacts to close a circuit turning on a lamp or other device powered off the backup AC power.</div><div>When the AC grid goes down, the relay de-energizes and closes the normally closed contacts thereby turning on the indicator device.</div><div><br></div><div>Richard</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Feb 27, 2025 at 9:18\u202fAM Nicholas Ponzio 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;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div>Dear Esteemed Wrenches,</div><div><br></div><div>This issue arises periodically, and I'm hopeful someone in the group has devised a cost-effective, low-power solution.</div><div><br></div><div>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><br></div><div>Thank you in advance for your insights.</div><div><br></div><div>Sincerely,</div><div>Nicholas Ponzio </div><div>Building Energy</div></div></div></blockquote></div>
</blockquote></div></div>