<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>I’m sorry to hijack this thread, but I just had a similar question about metallurgic compatibility of S-5 clamps. Their brochure says that they are completely compatible, and refers you to the website for details, but I am unable to find any there. Any comments on how I can assure my client would be appreciated.<o:p></o:p></span></p><div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><span style='font-size:12.0pt;color:#1F497D'>Jason Szumlanski<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><span style='color:#1F497D'>Fafco Solar<o:p></o:p></span></p></div><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Gary Willett<br><b>Sent:</b> Tuesday, July 12, 2011 6:24 PM<br><b>To:</b> RE-wrenches@lists.re-wrenches.org<br><b>Subject:</b> [RE-wrenches] Aluminum Module Frame To Galvanized Uni-Strut<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Fellow Wrenches:<br><br>I am involved in the commissioning of a 300kw parking structure PV system and have a concern about possible galvanic action between the aluminum module frames and the stainless steel uni-strut.<br><br>The installation contractor attached the PV modules using a WEEB-like stainless steel top-mounted clamp (to pierce the top of the PV frame). A stainless steel bolt connects the clamp to the channel nut. The bottom of the PV module is resting on the galvanized uni-strut.<br><br>Should there also be a WEEB-WMC assembly between the PV module and the uni-strut?<br><br>Anyone have any experience where direct contact of these dissimilar metals became an issue over time?<o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'>-- <br><br><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'><span style='font-size:10.0pt'>Regards,<br><br><br>Gary Willett, PE<br>Icarus Solar Services LLC<br>NABCEP Certified Solar PV Installer<br><a href="mailto:Gary@IcarusSolarServices.com">Gary@IcarusSolarServices.com</a></span><o:p></o:p></p></div></div></body></html>