Charlie, The installation manuals for the inverters you work with should clarify the acceptable service configurations. That¹s where I would start. (Actually, verify the service type first by having your electrician take line-to-line and line-to-neutral measurements at the service.) If you¹re talking about a 240 delta service with a 208 V high leg, you could interconnect a 3-phase central inverter that doesn¹t require a neutral connection; I believe Satcon fits this description. Or you could stack single-phase inverters line-to-line with at least one of the inverters configured such that it doesn¹t need to see the neutral. There may be a specific pin configuration that you need to set inside the inverter to enable operation without the neutral.
This John Berdner article on scaling up PV system designs appeared in the very first issue of SolarPro and includes some electrical service type diagrams that may be helpful: http://solarprofessional.com/article/?file=SP1_1_pg32_Berdner David Brearley, Senior Technical Editor SolarPro magazine NABCEP Certified PV Installer david.brear...@solarprofessional.com Direct: 541.261.6545 On 4/7/11 11:06 PM, "Aladdin Solar" <cpick...@aladdinsolar.com> wrote: > What is the best approach to interconnecting with a 208 volt 3-phase service > having a high leg? Small to medium sized PV systems. > > Charlie Pickard > Aladdin Solar > > > _______________________________________________ > 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 >
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