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@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@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 *maver...@mavericksolar.com >> 512-460-9825 >> >> >> On Oct 11, 2022, at 11:26 AM, Kirk Herander via RE-wrenches < >> re-wrenches@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@vermont.solar <kirkh@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 >> _______________________________________________ >> >> _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > -- *Kirk Herander / **kirkh@vermont.solar <kirkh@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
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
