Hi Nicholas, 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...
Corey Shalanski On Thu, Feb 27, 2025 at 11:09 AM Richard Scott <cheezemanr...@gmail.com > wrote: > How about a relay powered by the AC grid with SPDT contact configuration. > Use normally closed contacts to close a circuit turning on a lamp or other > device powered off the backup AC power. > When the AC grid goes down, the relay de-energizes and closes the normally > closed contacts thereby turning on the indicator device. > > Richard > > On Thu, Feb 27, 2025 at 9:18 AM Nicholas Ponzio via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Dear Esteemed Wrenches, >> >> This issue arises periodically, and I'm hopeful someone in the group has >> devised a cost-effective, low-power solution. >> >> 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. >> >> Thank you in advance for your insights. >> >> Sincerely, >> Nicholas Ponzio >> Building Energy >> >
Canary Lamp.pdf
Description: Adobe PDF document
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