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<font face="Helvetica, Arial, sans-serif">I think that the 230s
required positive grounding, so you can't swap out the inverter
for a TL unit. These two circuits in parallel will be fine for
your MPPT, you'll have essentially the same voltages but slightly
higher current in your new second string. <br>
<br>
DKC<br>
<br>
</font>
<div class="moz-cite-prefix">On 2013/7/12 19:27, August Goers wrote:<br>
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<p class="MsoNormal">Hi Wrenches,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I have a client with a small system
consisting of 6 SunPower 230s and a SMA SB 3000. Anyway, he
wants to add another 6 modules but the closest we can get from
SunPower these days is a 245. The new six modules would go on
a second string. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Do you think that the slight difference in
tracking voltage and current will be significant enough to
justify the cost of adding or swapping the inverter? Here is
the info for the modules:</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">SunPower 230 WHT</p>
<p class="MsoNormal">Vmpp 41.0 V</p>
<p class="MsoNormal">Impp 5.61 A</p>
<p class="MsoNormal">Voc 48.7 V</p>
<p class="MsoNormal">Isc 5.99 A</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">SunPower 245NE WHT</p>
<p class="MsoNormal">Vmpp 40.5 V</p>
<p class="MsoNormal">Impp 6.05 A</p>
<p class="MsoNormal">Voc 48.8 V</p>
<p class="MsoNormal">Isc 6.43 A</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I imagine that the tracker in the Sunny Boy
will be a little off and perhaps the result will be that both
strings will be running a few percent lower than they are
capable of?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Best, August</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><b><span
style="font-size:9.0pt;font-family:"Century
Gothic","sans-serif"">August Goers</span></b></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Century
Gothic","sans-serif"">Luminalt Energy
Corporation</span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Century
Gothic","sans-serif"">o: 415.641.4000</span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Century
Gothic","sans-serif"">m: 415.559.1525</span></p>
<p class="MsoNormal"> </p>
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