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

[Corey Shalanski]

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
> 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> 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
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20250227/a3b904b4/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Canary Lamp.pdf
Type: application/pdf
Size: 10925 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20250227/a3b904b4/attachment.pdf>