[RE-wrenches] Looking for remote controlled contactors

[Kirk Herander]

You are correct on this.

The failure of any control hardware, IO's / relays / contactor logic
along the way from generator sense to PV contactor should result in the
coupled grid-tie PV inverter disconnected. Which means the contactor at the
PV inverter should be energized "closed" (so PV AC connected normally open)
under normal operation (genny off, PV on).

Wired as such, It can be done with off the shelf components, and remotely
by adding some controlbyweb.com controllers.


On Tue, Oct 11, 2022 at 7:49 PM Jason Szumlanski via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> I'm not a fan of this strategy because it is not failsafe. Contactors
> fail. When the coil fails to open the contactor, you will have the PV AC
> coupled with the generator If he normally closed contactor is used in this
> manner.
>
> I think the question needs to be the converse: How do you turn the PV on
> remotely only when the generator is not running.
>
> Jason Szumlanski
> Florida Solar Design Group
>
>
>
>
>
> On Tue, Oct 11, 2022, 2:45 PM Maverick Brown via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> I’ll usually use  a 60 amp contactor with 240Vac coil.
>>
>> The generator powers the coil and opens the Normally Closed contacts
>> disconnecting the grid tie inverter.
>>
>> Maverick Brown
>> Off-Grid Solar Commander since 2006
>> *Maverick Solar Enterprises, Inc.*
>> * • Solar Commander Remote Power*
>>
>> * • SunFlow Systems Cathodic Protection *maverick at mavericksolar.com
>> 512-460-9825
>>
>>
>> On Oct 11, 2022, at 11:26 AM, Kirk Herander via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>> Hi,
>> I’m looking for suggestions on a remote control 60 amp contactor. It can
>> either be true wireless or send a signal down an AC power line to open /
>> close contact at the other end.
>>
>> I’m trying to figure out a non-wired way to turn an AC coupled inverter
>> off when the generator is running, as advised by outback and others.
>>
>> All suggestions welcome thank you.
>> --
>>
>> *Kirk Herander / **kirkh at vermont.solar <kirkh at vermont.solar>*
>>
>> *Owner|Principal, VT Solar, LLC*
>>
>> *Celebrating our 31st Anniversary 1991-2022!!*
>>
>> *www.vermont.solar*
>> <https://nam02.safelinks.protection.outlook.com/?url=www.vermontsolarnow.com&data=02%7C01%7C%7C9f0330d75a244870112408d685311841%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636842843233477645&sdata=0NjyuKeQbEK6245SNnk8X4XnP9Q%2B%2BqtvcALkdDghvk4%3D&reserved=0>
>>
>> dba Vermont Solar Engineering
>>
>> 802.863.1202
>> _______________________________________________
>>
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-- 

*Kirk Herander / **kirkh at vermont.solar <kirkh at vermont.solar>*

*Owner|Principal, VT Solar, LLC*

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

*www.vermont.solar*
<https://nam02.safelinks.protection.outlook.com/?url=www.vermontsolarnow.com&data=02%7C01%7C%7C9f0330d75a244870112408d685311841%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636842843233477645&sdata=0NjyuKeQbEK6245SNnk8X4XnP9Q%2B%2BqtvcALkdDghvk4%3D&reserved=0>

dba Vermont Solar Engineering

802.863.1202
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