Re: [RE-wrenches] Wireless relays

[Kirk Herander via RE-wrenches]

Hi Jason,

https://www.iohvaccontrols.com/category/wireless-solutions.html

I used the IO-WRP model, with a range of about 1/4 mi. to remotely
disconnect a GTI whenever the backup genny starts. The next model down,
without antenna, has a range of about 100 ft.
The IO-WRP was better suited to my app. I am going from the basement of the
main house where the system / gen ATS is to a barn about 150' away where
the array is mounted.

These units are actually designed for hvac to be controlled remotely by
T-stats or whatever. But basically if any of the 3 send channels have 24vac
applied on the base unit, the corresponding receive channel on the
satellite unit will output 24vac. So that signal in my case is holding a
contactor closed to keep the GTI connected to grid AC unless the generator
starts.

What's nice about these RF units is that if the 24vac power is lost on
either for any reason, connection will be lost and the action at the remote
unit will be aborted. pretty failsafe by nature, at least for what I'm
doing.

I purchased it online from supplyhouse.com - no local distributor stocked
them.

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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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
> ___
> List sponsored by Redwood Alliance
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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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[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 for load shedding?

[Glenn Burt]

This company seems to have many wireless relay options, although you will have 
to use a contactor actuated by the receiver relay, but looks like they could do 
what you are looking for.I don't have first hand experience with this company, 
but wireless control is pretty much ubiquitous these days.
http://relaypros.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=NCD&Category_Code=Wireless&gclid=CjwKCAjwopTYBRAzEiwAnU4kb2mPYyZIMxBdIyVhNALpPn_0aqcdwOHzrvgEDQncJgMFOt6nkkCI5xoCfLcQAvD_BwE


GlennSent from my 'smart' phone so please excuse spelling and typographical 
errors.
-- Original message--From: Eric YoungrenDate: Wed, May 23, 2018 3:28 
PMTo: RE-wrenches;Cc: Subject:[RE-wrenches] wireless relays for load shedding?
Howdy Wrenches,
I'm working on a generator powered mini-grid for an island fishing resort in 
Alaska. They have 3 XW6048 inverter/chargers to charge batteries while the 
diesel runs and power the loads from the batteries when the diesel shuts down.  

They have several high power heating loads not typically seen in battery-based 
off-grid electrical systems. Two 4kW hot tub heaters and six 1kW infrared space 
heaters.  We have the 46 kW generator run-times set so that the infrared 
heaters are (in theory) powered only while the generator is running, but the 
hot tubs are thermostatically controlled and cycle on and off every 4-5 hours 
or so.  
I want to make it so that these big heating loads can never be powered from the 
batteries, and will only come on while the generator is running.  The current 
plan is to use the Auxillary output 12V terminals from one of the XWs to 
control power relays to switch the hot tub circuits, based on battery voltage 
triggers. One of those hot tub circuits is fed from the main panel right next 
to the inverters so that is easy enough.  But the other hot tub is fed from a 
sub-panel located in a different building around 200 feet away from the 
inverters. Pulling a pair of wires to control the second relay at that 
sub-panel is not practical.  So, I'm looking for wireless options that could 
control a power relay for the hot tub circuit in the remote sub-panel. Ideally, 
the control signal would come from the same AUX terminal so both hot tubs will 
not receive power when the battery voltage is below 50 volts or so, which would 
indicate that the generator is not running.  
I would also like to put the infrared heaters on a similar control system so 
that we are not dependent on people remembering to switch off the heaters 
before the generator shuts down.  
Has any of you done this kind of thing?  Any suggestions on equipment or best 
practices?  THANKS!
Eric Youngren
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Re: [RE-wrenches] wireless relays for load shedding?

[Darryl Thayer]

Hello, sorry if this is not valuable, but I used a "Wink" device a few
years ago to control a Wink switch, to switch to control a relay to control
a backup heat source if the temperature got to low.  Sorry I do not
remember a lot more.

On Wed, May 23, 2018 at 2:28 PM, Eric Youngren 
wrote:

> Howdy Wrenches,
>
> I'm working on a generator powered mini-grid for an island fishing resort
> in Alaska. They have 3 XW6048 inverter/chargers to charge batteries while
> the diesel runs and power the loads from the batteries when the diesel
> shuts down.
>
> They have several high power heating loads not typically seen in
> battery-based off-grid electrical systems. Two 4kW hot tub heaters and six
> 1kW infrared space heaters.  We have the 46 kW generator run-times set so
> that the infrared heaters are (in theory) powered only while the generator
> is running, but the hot tubs are thermostatically controlled and cycle on
> and off every 4-5 hours or so.
>
> I want to make it so that these big heating loads can never be powered
> from the batteries, and will only come on while the generator is running.
> The current plan is to use the Auxillary output 12V terminals from one of
> the XWs to control power relays to switch the hot tub circuits, based on
> battery voltage triggers. One of those hot tub circuits is fed from the
> main panel right next to the inverters so that is easy enough.  But the
> other hot tub is fed from a sub-panel located in a different building
> around 200 feet away from the inverters. Pulling a pair of wires to
> control the second relay at that sub-panel is not practical.  So, I'm
> looking for wireless options that could control a power relay for the hot
> tub circuit in the remote sub-panel. Ideally, the control signal would come
> from the same AUX terminal so both hot tubs will not receive power when the
> battery voltage is below 50 volts or so, which would indicate that the
> generator is not running.
>
> I would also like to put the infrared heaters on a similar control system
> so that we are not dependent on people remembering to switch off the
> heaters before the generator shuts down.
>
> Has any of you done this kind of thing?  Any suggestions on equipment or
> best practices?  THANKS!
>
> Eric Youngren
>
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Re: [RE-wrenches] wireless relays for load shedding?

[Steven Lawrence]

Phoenix contact makes a bunch of wireless radios and relays that can
communicate discrete signals as well as standard communications.  I've used
it for a minimum export relay with SCE and telemetry for SCE.  It's simple
to install and use.  If you're going wireless, make sure you have line of
sight though.
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Re: [RE-wrenches] wireless relays for load shedding?

[Dave Angelini Offgrid Solar]

You would be separating the heater load from the hot tub jets right? If
you do not then the jets will not run unless the power is on?
Seems like a problem if someone wants to use the tub when the gen set is
off.  --Dave


> Wireless - I have no clue but - Simplest thing that comes to mind is
> spring wound timers on the infrared lamps & clock timers.
>
> Spring wound timers come in lots of “length of time options”
>
> Could the hot tubs have a “Use schedule” to coincide with the clock
> settings?
>
>
>
> 
>
> Dana Orzel  Great Solar Works, Inc.
>
> C - 208.721.7003   d...@solarwork.com
>
> Idaho Contractor - # 028765 Idaho PV # 028374
>
> NABCEP # 051112-136   www.solarwork.biz
> <http://www.solarwork.biz>
>
> "Responsible Technologies for Responsible People since 1988"
>
> P Please consider the environment before printing this email.
>
>
>
>
>
> From: RE-wrenches  On Behalf Of
> Eric Youngren
> Sent: Wednesday, May 23, 2018 1:28 PM
> To: RE-wrenches 
> Subject: [RE-wrenches] wireless relays for load shedding?
>
>
>
> Howdy Wrenches,
>
>
>
> I'm working on a generator powered mini-grid for an island fishing resort
> in Alaska. They have 3 XW6048 inverter/chargers to charge batteries while
> the diesel runs and power the loads from the batteries when the diesel
> shuts down.
>
>
>
> They have several high power heating loads not typically seen in
> battery-based off-grid electrical systems. Two 4kW hot tub heaters and six
> 1kW infrared space heaters.  We have the 46 kW generator run-times set so
> that the infrared heaters are (in theory) powered only while the generator
> is running, but the hot tubs are thermostatically controlled and cycle on
> and off every 4-5 hours or so.
>
>
>
> I want to make it so that these big heating loads can never be powered
> from the batteries, and will only come on while the generator is running.
> The current plan is to use the Auxillary output 12V terminals from one of
> the XWs to control power relays to switch the hot tub circuits, based on
> battery voltage triggers. One of those hot tub circuits is fed from the
> main panel right next to the inverters so that is easy enough.  But the
> other hot tub is fed from a sub-panel located in a different building
> around 200 feet away from the inverters. Pulling a pair of wires to
> control the second relay at that sub-panel is not practical.  So, I'm
> looking for wireless options that could control a power relay for the hot
> tub circuit in the remote sub-panel. Ideally, the control signal would
> come from the same AUX terminal so both hot tubs will not receive power
> when the battery voltage is below 50 volts or so, which would indicate
> that the generator is not running.
>
>
>
> I would also like to put the infrared heaters on a similar control system
> so that we are not dependent on people remembering to switch off the
> heaters before the generator shuts down.
>
>
>
> Has any of you done this kind of thing?  Any suggestions on equipment or
> best practices?  THANKS!
>
>
>
> Eric Youngren
>
> ___
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Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail  offgridso...@sti.net
text 209 813 0060

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Re: [RE-wrenches] wireless relays for load shedding?

[Eric Youngren]

That would be great but it’s too late now.  When all this was originally
built and wired it was 24/7 generator power. So everything is fed from one
main panel at the generator building.

Plus, the loads are on an ATS that is external to the inverters.  When the
generator is running it feeds the loads directly (and charges the battery),
there are no pass-through loads on the inverter output.



On Wed, May 23, 2018 at 12:16 PM William Miller 
wrote:

> Eric:
>
> Any reason not putting these loads on a gen-fed panel?
>
> William
>
> > On May 23, 2018, at 12:28 PM, Eric Youngren 
> wrote:
> >
> > Howdy Wrenches,
> >
> > I'm working on a generator powered mini-grid for an island fishing
> resort in Alaska. They have 3 XW6048 inverter/chargers to charge batteries
> while the diesel runs and power the loads from the batteries when the
> diesel shuts down.
> >
> > They have several high power heating loads not typically seen in
> battery-based off-grid electrical systems. Two 4kW hot tub heaters and six
> 1kW infrared space heaters.  We have the 46 kW generator run-times set so
> that the infrared heaters are (in theory) powered only while the generator
> is running, but the hot tubs are thermostatically controlled and cycle on
> and off every 4-5 hours or so.
> >
> > I want to make it so that these big heating loads can never be powered
> from the batteries, and will only come on while the generator is running.
> The current plan is to use the Auxillary output 12V terminals from one of
> the XWs to control power relays to switch the hot tub circuits, based on
> battery voltage triggers. One of those hot tub circuits is fed from the
> main panel right next to the inverters so that is easy enough.  But the
> other hot tub is fed from a sub-panel located in a different building
> around 200 feet away from the inverters. Pulling a pair of wires to control
> the second relay at that sub-panel is not practical.  So, I'm looking for
> wireless options that could control a power relay for the hot tub circuit
> in the remote sub-panel. Ideally, the control signal would come from the
> same AUX terminal so both hot tubs will not receive power when the battery
> voltage is below 50 volts or so, which would indicate that the generator is
> not running.
> >
> > I would also like to put the infrared heaters on a similar control
> system so that we are not dependent on people remembering to switch off the
> heaters before the generator shuts down.
> >
> > Has any of you done this kind of thing?  Any suggestions on equipment or
> best practices?  THANKS!
> >
> > Eric Youngren
> > ___
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Re: [RE-wrenches] wireless relays for load shedding?

[Dana]

Wireless - I have no clue but - Simplest thing that comes to mind is spring 
wound timers on the infrared lamps & clock timers.

Spring wound timers come in lots of “length of time options”

Could the hot tubs have a “Use schedule” to coincide with the clock settings?

 



Dana Orzel  Great Solar Works, Inc. 

C - 208.721.7003   d...@solarwork.com

Idaho Contractor - # 028765 Idaho PV # 028374

NABCEP # 051112-136   www.solarwork.biz 
<http://www.solarwork.biz> 

"Responsible Technologies for Responsible People since 1988"  

P Please consider the environment before printing this email.

 

 

From: RE-wrenches  On Behalf Of Eric 
Youngren
Sent: Wednesday, May 23, 2018 1:28 PM
To: RE-wrenches 
Subject: [RE-wrenches] wireless relays for load shedding?

 

Howdy Wrenches,

 

I'm working on a generator powered mini-grid for an island fishing resort in 
Alaska. They have 3 XW6048 inverter/chargers to charge batteries while the 
diesel runs and power the loads from the batteries when the diesel shuts down.  

 

They have several high power heating loads not typically seen in battery-based 
off-grid electrical systems. Two 4kW hot tub heaters and six 1kW infrared space 
heaters.  We have the 46 kW generator run-times set so that the infrared 
heaters are (in theory) powered only while the generator is running, but the 
hot tubs are thermostatically controlled and cycle on and off every 4-5 hours 
or so.  

 

I want to make it so that these big heating loads can never be powered from the 
batteries, and will only come on while the generator is running.  The current 
plan is to use the Auxillary output 12V terminals from one of the XWs to 
control power relays to switch the hot tub circuits, based on battery voltage 
triggers. One of those hot tub circuits is fed from the main panel right next 
to the inverters so that is easy enough.  But the other hot tub is fed from a 
sub-panel located in a different building around 200 feet away from the 
inverters. Pulling a pair of wires to control the second relay at that 
sub-panel is not practical.  So, I'm looking for wireless options that could 
control a power relay for the hot tub circuit in the remote sub-panel. Ideally, 
the control signal would come from the same AUX terminal so both hot tubs will 
not receive power when the battery voltage is below 50 volts or so, which would 
indicate that the generator is not running.  

 

I would also like to put the infrared heaters on a similar control system so 
that we are not dependent on people remembering to switch off the heaters 
before the generator shuts down.  

 

Has any of you done this kind of thing?  Any suggestions on equipment or best 
practices?  THANKS!

 

Eric Youngren

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Re: [RE-wrenches] wireless relays for load shedding?

[William Miller]

Eric:

Any reason not putting these loads on a gen-fed panel?

William

> On May 23, 2018, at 12:28 PM, Eric Youngren  wrote:
> 
> Howdy Wrenches,
> 
> I'm working on a generator powered mini-grid for an island fishing resort in 
> Alaska. They have 3 XW6048 inverter/chargers to charge batteries while the 
> diesel runs and power the loads from the batteries when the diesel shuts 
> down.  
> 
> They have several high power heating loads not typically seen in 
> battery-based off-grid electrical systems. Two 4kW hot tub heaters and six 
> 1kW infrared space heaters.  We have the 46 kW generator run-times set so 
> that the infrared heaters are (in theory) powered only while the generator is 
> running, but the hot tubs are thermostatically controlled and cycle on and 
> off every 4-5 hours or so.  
> 
> I want to make it so that these big heating loads can never be powered from 
> the batteries, and will only come on while the generator is running.  The 
> current plan is to use the Auxillary output 12V terminals from one of the XWs 
> to control power relays to switch the hot tub circuits, based on battery 
> voltage triggers. One of those hot tub circuits is fed from the main panel 
> right next to the inverters so that is easy enough.  But the other hot tub is 
> fed from a sub-panel located in a different building around 200 feet away 
> from the inverters. Pulling a pair of wires to control the second relay at 
> that sub-panel is not practical.  So, I'm looking for wireless options that 
> could control a power relay for the hot tub circuit in the remote sub-panel. 
> Ideally, the control signal would come from the same AUX terminal so both hot 
> tubs will not receive power when the battery voltage is below 50 volts or so, 
> which would indicate that the generator is not running.  
> 
> I would also like to put the infrared heaters on a similar control system so 
> that we are not dependent on people remembering to switch off the heaters 
> before the generator shuts down.  
> 
> Has any of you done this kind of thing?  Any suggestions on equipment or best 
> practices?  THANKS!
> 
> Eric Youngren
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[RE-wrenches] wireless relays for load shedding?

[Eric Youngren]

Howdy Wrenches,

I'm working on a generator powered mini-grid for an island fishing resort
in Alaska. They have 3 XW6048 inverter/chargers to charge batteries while
the diesel runs and power the loads from the batteries when the diesel
shuts down.

They have several high power heating loads not typically seen in
battery-based off-grid electrical systems. Two 4kW hot tub heaters and six
1kW infrared space heaters.  We have the 46 kW generator run-times set so
that the infrared heaters are (in theory) powered only while the generator
is running, but the hot tubs are thermostatically controlled and cycle on
and off every 4-5 hours or so.

I want to make it so that these big heating loads can never be powered from
the batteries, and will only come on while the generator is running.  The
current plan is to use the Auxillary output 12V terminals from one of the
XWs to control power relays to switch the hot tub circuits, based on
battery voltage triggers. One of those hot tub circuits is fed from the
main panel right next to the inverters so that is easy enough.  But the
other hot tub is fed from a sub-panel located in a different building
around 200 feet away from the inverters. Pulling a pair of wires to
control the second relay at that sub-panel is not practical.  So, I'm
looking for wireless options that could control a power relay for the hot
tub circuit in the remote sub-panel. Ideally, the control signal would come
from the same AUX terminal so both hot tubs will not receive power when the
battery voltage is below 50 volts or so, which would indicate that the
generator is not running.

I would also like to put the infrared heaters on a similar control system
so that we are not dependent on people remembering to switch off the
heaters before the generator shuts down.

Has any of you done this kind of thing?  Any suggestions on equipment or
best practices?  THANKS!

Eric Youngren
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