[RE-wrenches] Wireless relays

[Jason Szumlanski via RE-wrenches]

Recently there was a discussion about remotely controlled contactors to
shed PV during generator operation I believe. I have a little bit of a
different need for remote relays. I need to remotely disconnect air
conditioning 24 volt control circuits using the dry contacts in the Enphase
smart controller. In other words, I want to shed air conditioning loads
when the system goes off grid and selectively turn them back on using the
logic in the smart controller. So what I would need is something that
detects a disconnection of the dry contacts and then sends a wireless
signal to disconnect the 24 volt control circuit at the remote location in
the house.

Normally I would just hardwire this, but it is not an option in this case.
Does anyone know of an elegant and cost effective way to accomplish this?

Jason Szumlanski
Florida Solar Design Group
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Re: [RE-wrenches] Wireless relays

[Kirk Herander via RE-wrenches]

Jason, I just successfully hooked up a a remote 915mhz RF circuit to
accomplish GTI disconnect in a AC coupled system when the backup generator
starts.
I think this is the discussion you are referring to. I’m on the road right
now but will post details including the source of the send/receive units
when I get back to a computer. It’s been working for over two weeks now
with no problems whatsoever.

On Mon, Nov 7, 2022 at 9:34 AM Jason Szumlanski via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Recently there was a discussion about remotely controlled contactors to
> shed PV during generator operation I believe. I have a little bit of a
> different need for remote relays. I need to remotely disconnect air
> conditioning 24 volt control circuits using the dry contacts in the Enphase
> smart controller. In other words, I want to shed air conditioning loads
> when the system goes off grid and selectively turn them back on using the
> logic in the smart controller. So what I would need is something that
> detects a disconnection of the dry contacts and then sends a wireless
> signal to disconnect the 24 volt control circuit at the remote location in
> the house.
>
> Normally I would just hardwire this, but it is not an option in this case.
> Does anyone know of an elegant and cost effective way to accomplish this?
>
> Jason Szumlanski
> Florida Solar Design Group
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> --

*Kirk Herander / **kirkh@vermont.solar *

*Owner|Principal, VT Solar, LLC*

*Celebrating our 31st Anniversary 1991-2022!!*

*www.vermont.solar*


dba Vermont Solar Engineering

802.863.1202
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