Hello all I am under a time line so I do not have time to review until later. But I have tried a few times and I can not ever get a grid tied inverter to sync with a generator. I have been successful with bimodal (Battery based)inverters in a varied ways. (Apollo, Outback, Xantrex)
A word of caution, a generator in parallel with an inverter can give strange voltage spikes. This is the same as with inverters for mortor drives (never try this with a modified sine wave, and the voltage spikes may be why some people have reported damage to generator boards) . Darryl --- On Tue, 3/2/10, Jason Szumlanski <ja...@fafcosolar.com> wrote: > From: Jason Szumlanski <ja...@fafcosolar.com> > Subject: Re: [RE-wrenches] Generators and Grid-tie Systems > To: re-wrenches@lists.re-wrenches.org > Date: Tuesday, March 2, 2010, 1:22 PM > While inverters are supposed to work > this way, and do so very well on > the grid, have any inverters been formally TESTED with > various > generators to confirm the theory? > > Anecdotes and theories are not enough. Until there are > TESTS and > guarantees from inverter manufacturers that expensive > generator control > boards will not be damaged, I would err on the side of > caution. Get a > waiver from your customer if they insist you connect on the > load side of > the generator transfer switch. I doubt you will get an > independent P.E. > to sign off on it and take the liability. I could be wrong, > but........ > why risk it? > > Jason Szumlanski > Fafco Solar > http://fafcosolar.com > > -----Original Message----- > > > All, > > If the grid-tie inverter is operating under UL1741 (and > therefore > IEEE1547), > then the inverter has to cease output within 1 second of > the voltage > going > over 10% of the base voltage. So in the case where > the generator is > outputting and the load is less than the inverter output, > the voltage > will > rise and the inverter will cease to ouput. The > voltage will then drop, > the > inverter will reconnect, and the cycle will repeat > itself. That assumes > the > generator's waveform is clean enough for the inverter to > connect to in > the > first place. James Worden from Solectria Renewables > covered this > briefly in > a SolarPro article: > http://solarprofessional.com/article/?file=SP2_5_pg16_QandA_2. > > - Mike > -- > Michael Kelly > Project Manager / Project Engineer > NABCEP Certified Solar PV Installer ? > > SolarFlair Energy, Inc. > 11 Mayhew Street > Framingham, MA 01702 > Direct Mobile: 617-899-9840 > Main Phone: 508-293-4293 > Main Fax: 508-293-4003 > m...@solarflair.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
