We run into this a lot in the Caribbean. Our general rule is that it depends on the load. If it is a constant commercial load and the PV is about half of the load, no issue. But for residential and where PV exceeds the lowest load, we prefer to be on the utility side of the ATS or use a contactor on the PV combiner held in by the utility power.
On Tue, Oct 28, 2014 at 10:48 AM, Corey Shalanski < cshalan...@joule-energy.com> wrote: > Wrenches, > > We frequently encounter residences with backup generators. The question > that arises: how should the PV system be interconnected? > > I have searched the archives and found some good information about this > subject, but nothing definitive. I have fallen into the habit of broadly > proclaiming that the PV system *must* be interconnected on the "utility" > side of the transfer switch - in order to prevent backfeeding into the > generator and thereby eliminate unintentional equipment damage. Is this > concern justified? If so, should this be an absolute rule or would it > depend on the generator make/model? > > Thanks for any insights. > > -- > Corey Shalanski > Joule Energy > New Orleans, LA > > _______________________________________________ > List sponsored by Redwood Alliance > > 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 > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > -- Chris Mason NABCEP Certified Solar PV Installer™ Solar Design Engineer Generac Generators Industrial technician www.cometsolar.com <http://www.cometenergysystems.com> 264.235.5670 869.662.5670 Skype: netconcepts
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