[RE-wrenches] Backup Mode Indicator for Whole Home Battery?

[Blair May]

Have a look at these relay combinations. Relay in a box @ www.functionaldevices.com <http://www.functionaldevices.com/>. Easy install, its what I use to let me know if the grid is connected. T 


> On Feb 27, 2025, at 10:08 PM, Corey Shalanski via RE-wrenches <re-wrenches at lists.re-wrenches.org <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
> 
> 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 <cheezemanrich at gmail.com <mailto:cheezemanrich at 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 at lists.re-wrenches.org <mailto:re-wrenches at 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

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Blair “TUMP” May
Solarwinds Northernlights east
"We must all learn to live together as brothers,
 or we all will perish as fools."
MLK





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