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<TITLE>Re: [RE-wrenches] overfeed 7kW gridtie inverter or drop a mod per string?</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Is using the SMA SB 8000US out of the question?<BR>
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<a href="http://www.sma-america.com/en/products/solar-inverters/sunny-boy/sunny-boy-5000us-6000us-7000us-8000us.html">http://www.sma-america.com/en/products/solar-inverters/sunny-boy/sunny-boy-5000us-6000us-7000us-8000us.html</a><BR>
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On 4/19/10 3:37 PM, "Jim MacDonald" <<a href="jmac@solaresystems.com">jmac@solaresystems.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>For a straight grid-tie system@ 10 degree tilt, 180 azimuth, zero/little shade, NYC avg 4.29 kWh/m</SPAN><SPAN STYLE='font-size:12pt'>”/day.<BR>
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Feed an SMA7000 with (3) strings of 11 Suntech STP275’s [9.075 kWdc]<BR>
Or<BR>
Do strings of 10, so itd be 8.250 kWdc into the 7 kWac inverter.<BR>
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Strings of 11= 491.7 Voc; 386 Vmp<BR>
Strings of 10= 447 Voc; 351 Vmp <BR>
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The tradeoff would be power clipping at/around noon in the sunny months in the 9.075 kW scenario;<BR>
Inverter sleeping late every morning and retiring early in the evenings in the lowered voltage scenario.<BR>
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Trying to figure out which would yield more kWh at the end of the year.<BR>
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Any ideas appreciated,<BR>
thanks<BR>
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</SPAN></FONT><FONT COLOR="#002060"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10pt'><B>Jim MacDonald<BR>
</B>Solar Energy Systems, LLC<BR>
Brooklyn, NY 11222<BR>
</SPAN></FONT></FONT></FONT><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10pt'><FONT COLOR="#0000FF">www.solarEsystems.com</FONT><FONT COLOR="#1F497D"> <<a href="http://www.solaresystems.com/">http://www.solaresystems.com/</a>> <BR>
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