What happens when the contactor fails? I don't trust a NC contactor that is supposed to open on 240Vac coil voltage from the generator. It's not a failsafe solution.
Jason On Tue, May 4, 2021, 3:15 PM Drake <drake.chamber...@redwoodalliance.org> wrote: > P.S. The contactor method is even mentioned somewhere in the Outback > literature. I've been using it for years. It is very simple and requires no > complex equipment. It will not interfere with rapid shutdown. 40 A, 240 V > contactors with 240 V coils are readily available and not terribly > expensive. The 240 V output of the generator circuit provides the signal. > > At 10:02 AM 5/4/2021, you wrote: > > Get a contactor with a 240 VAC coil. Connect the coil wire wires to the > 240 V output circuit of the generator, so when the generator comes on, the > contactor opens. Run the current from the AC coupled Enphase inverters > through the contacts from common to N/C. > > --- > > > > On 2021-05-03 10:26, Dave Tedeyan wrote: > > Hi All, > > I am planning on using a Sol-Ark for the first time for adding battery > backup to an existing system. It is Enphase, so clearly it will be AC > coupled, and there is a whole house generator. When I talked to Sol-Ark > about it, they recommended putting the generator on a time of use schedule > to not allow it to come on during the day so that we don't run into the > issue of the solar backfeeding the generator. > > I was wondering though if anyone has just used a contactor to cut out the > solar when the generator turns on? Something like Outback's GS-AC-Gen-Kit, > although in this case I will need something rated for just over 30A. This > seems like a better way to allow the generator to run at any time it is > needed, especially if it is a gloomy, snowy, winter day. > > Cheers, > Dave > > -- > > *Dave Tedeyan, PE * [image: Sungineer Solar] > 1653 Slaterville Road, Ithaca, NY 14850 > Cell: 607-288-2898 > www.sungineersolar.com > > _______________________________________________ > 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 > > > > _______________________________________________ > 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 > > _______________________________________________ > 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 > >
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