Couldn't you power a relay from the incoming utility, so it closes on loss of utility?
On Thu, Aug 9, 2012 at 11:18 AM, Allan Sindelar < al...@positiveenergysolar.com> wrote: > Wrenches, > For a grid-tied-with-backup system that is still in the design stage, we > have a customer request for a signal to let them know when an outage occurs > and they are running on backup power, so that they may turn off unnecessary > loads and "go into backup consciousness". The problem is that the entire > home would be on backup, with the GTWB system tied into a meter and main > disconnect location away from the home, rather than the more typical main > panel/subpanel approach at the home. Any relay-based alarm based on loss of > grid AC would not likely trigger, as the switchover is too quick. Any ideas > for simple solutions, please? > Allan > -- > *Allan Sindelar* > *al...@positiveenergysolar.com* <al...@positiveenergysolar.com> > NABCEP Certified Photovoltaic Installer > NABCEP Certified Technical Sales Professional > New Mexico EE98J Journeyman Electrician > Founder and Chief Technology Officer > *Positive Energy, Inc.* > 3209 Richards Lane (note new address) > Santa Fe, New Mexico 87507 > *505 424-1112* > *www.positiveenergysolar.com* <http://www.positiveenergysolar.com/>**** > > ***************** > * > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > -- Chris Mason President, Comet Systems Ltd www.cometenergysystems.com Cell: 264.235.5670 Skype: netconcepts
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