Is using the SMA SB 8000US out of the question? http://www.sma-america.com/en/products/solar-inverters/sunny-boy/sunny-boy-5 000us-6000us-7000us-8000us.html
On 4/19/10 3:37 PM, "Jim MacDonald" <j...@solaresystems.com> wrote: > For a straight grid-tie system@ 10 degree tilt, 180 azimuth, zero/little > shade, NYC avg 4.29 kWh/m²/day. > > Feed an SMA7000 with (3) strings of 11 Suntech STP275¹s [9.075 kWdc] > Or > Do strings of 10, so itd be 8.250 kWdc into the 7 kWac inverter. > > Strings of 11= 491.7 Voc; 386 Vmp > Strings of 10= 447 Voc; 351 Vmp > > The tradeoff would be power clipping at/around noon in the sunny months in the > 9.075 kW scenario; > Inverter sleeping late every morning and retiring early in the evenings in the > lowered voltage scenario. > > Trying to figure out which would yield more kWh at the end of the year. > > Any ideas appreciated, > thanks > > > > > Jim MacDonald > Solar Energy Systems, LLC > Brooklyn, NY 11222 > www.solarEsystems.com <http://www.solaresystems.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 > David Brearley, Senior Technical Editor SolarPro magazine NABCEP Certified PV Installer david.brear...@solarprofessional.com Direct: 541.261.6545 Fax: 541.512.0343 Visit our Web site at solarprofessional.com (Sample copy available for download at: solarprofessional.com/sample)
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