I have a system with Enphase inverters that has a 1/2" cable crossing 8-10ft above the array. I used the Enphase inverters specifically for isolating that shading, but have seen no noticeable impact on production from the modules being shaded.<br clear="all">
<br>Dana<br><br>Dana Brandt<br>Ecotech Energy Systems, LLC<br><a href="http://www.ecotechenergy.com">www.ecotechenergy.com</a><br><a href="mailto:dana@ecotechenergy.com">dana@ecotechenergy.com</a><br>360.510.0433<br>
<br><br><div class="gmail_quote">On Mon, Oct 11, 2010 at 8:17 PM, Nick Soleil <span dir="ltr"><<a href="mailto:nicksoleilsolar@yahoo.com">nicksoleilsolar@yahoo.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;">I have some anecdotal experience that may be valuable. I just recently installed a system under a set of 3 power and 3 phone wires located about 20' above the array. The system was installed with Enphase micro-inverters, so I could clearly see the effect of the wires on the shaded modules. I just checked todays production, and the modules with wire shadows on them were producing 18-21% less per module than the modules without the shadows. <br>
At another site with just one 1/2" phone wire located 3' above a module, that module is producing 2-3% less when shaded. <br><div> </div>Nick Soleil<br>Project Manager<br>Advanced Alternative Energy Solutions, LLC<br>
PO Box 657<br>Petaluma, CA 94953<br>Cell: 707-321-2937<br>Office: 707-789-9537<br>Fax:
707-769-9037<div><br></div><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1">
<b><span style="font-weight: bold;">From:</span></b> Eric Thomas <<a href="mailto:solarepiphany@gmail.com" target="_blank">solarepiphany@gmail.com</a>><div class="im"><br><b><span style="font-weight: bold;">To:</span></b> <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br>
</div><b><span style="font-weight: bold;">Sent:</span></b> Mon, October 11, 2010 12:28:33 PM<div class="im"><br><b><span style="font-weight: bold;">Subject:</span></b> [RE-wrenches] Power line shading<br></div></font><div>
<div></div><div class="h5"><br>
<p>Hey there,</p>
<p>We have a string inverter system installation coming up that has a power line suspended over the roof. The line is diagonal to the roof and about 20' above the surface. It will be very challenging to configure the strings to mitigate shading. Does anyone have experience with the effects on producion from the thin shadow cast by the powerline? </p>
<p>Thanks</p>
<p>Eric Thomas <br>
Solar Epiphany LLC<br>
Seattle<br>
(206)919-3014</p>
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