HI nICK If it fits I like the ,1,2,3, approach, I have only used Outback for this, and it is for Bimodal systems. 1 is the grid, if it fails, 2 the outback picks up the priority loads, When the batteries voltage collapses the generator starts and the ATS picks up the priority laods. This is not as elequent as it is possible to be but it is simple and seems to work for the person that has infrequent outages. For short outages the Outbacks carry it all, for longer outages the generator picks up. and every thing is operating in its comfort zone and no back feed exists. If I want to change the batteries from the generator I use the DT kluge circuit, (step down transformer, rectifier, charge controller) Daryl
--- On Mon, 2/15/10, Nick Soleil <nicksoleilso...@yahoo.com> wrote: > From: Nick Soleil <nicksoleilso...@yahoo.com> > Subject: Re: [RE-wrenches] anti islanding? > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > Date: Monday, February 15, 2010, 9:27 AM > I have a couple of > projects coming up, which will require additional work > to prevent connecting to a Generac Guardian's ATS > panels. Do the same concerns still exist regarding > back-feeding an inverter to a generator panel? Can the > inverter damage the generator? I know this was the > cases, at least theoretically. Should I continue to be > concerned? > Nick Soleil > Project Manager > Advanced Alternative Energy Solutions, LLC > PO Box 657 > Petaluma, CA 94953 > Cell: 707-321-2937 > Office: 707-789-9537 > Fax: 707-769-9037 > > From: Darryl Thayer > <daryl_so...@yahoo.com> > To: > RE-wrenches <re-wrenches@lists.re-wrenches.org> > Sent: Sat, > February 13, 2010 5:51:33 PM > Subject: Re: > [RE-wrenches] anti islanding? > > > Hi August > I felt I was a little to cryptic in my answer, so here is a > longer answer. > > > The inverter always tries to increase the frequency if it > is connected to a grid, it could never speed up all those > billions of tons of rotating equipment, so the frequency > stays the same. If two inverters see themselves they > will both try to increase the frequency, they will succeed > and if the frequency is greater than the 60.5 HZ the > inverter shuts off. If there is a load that can > stabilize frequency such as a synchronous motor they will > either speed up the motor or they will not be able and the > motor will slow down. Either way the frequency changes > and the inverter shuts down for frequency out of > specification which is <60.5 or >59.3 else the > inverter shuts down. > > The inverter also looks at a voltage, and to sell power it > wants to raise voltage, necessary to put power into the > grid. Unless the load exactly > matches the inverter power the voltage will rise or fall > if the load is to large and it will fall out of voltage > specification shutting the inverter down. > > One Last feature, the inverter is voltage commutated, and > it looks for voltage to add its power to. if you had purely > a resistive load, both inverters would wait for the voltage > from the other inverter, and nothing would get done. > > > > > Think of it this way, for the system to last for 10 > seconds, the speed of this strange device (synchronus motor) > cannot change speed more than 0.5% per 10 second and it > would coast for 30 minutes before stopping, and this motor > would have to be doing no work. > > --- On Sat, 2/13/10, August Goers <aug...@luminalt.com> > wrote: > > > From: August Goers <aug...@luminalt.com> > > Subject: [RE-wrenches] anti islanding? > > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > > Date: Saturday, February 13, 2010, 10:29 AM > > Hi Wrenches, > > > > Does anyone know where I can go to read about general > > information on how grid tied inver anti islanding > works? I'd > > like to be able to describe this in better detail to > our > > tech-savvy clients. > > > > Thanks, > > > > August > > > > > > August Goers > > > > Luminalt Energy Corporation > > O: 415.564.7652 > > M: 415.559.1525 > > F: 650.244.9167 > > www.luminalt.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 > > > > > > > > > _______________________________________________ > 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 > > > > > > > -----Inline Attachment Follows----- > > _______________________________________________ > 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 > > _______________________________________________ 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
