Hi Nik,
This is an interesting one. What is going on along the bottom edge of the modules? Is that corrosion or lichen or bird poop remnants? The racking and sides of the modules look fine. I suppose moisture might be collecting along the bottom module lip and something is happening to the black anodizing there. It looks like you have a piece of rubber separating the brass S5 clamp from the L-foot? The only thing that I can think of that might be dielectric related might be making sure there is a good bond between the module frame, racking, and roof but that doesn't really seem to be the issue here. Looks like a nice building! Best, August *August Goers* Luminalt Energy Corporation o: 415.641.4000 m: 415.559.1525 *From:* [email protected] [mailto: [email protected]] *On Behalf Of *Nik Ponzio, Building Energy *Sent:* Monday, September 16, 2013 2:10 PM *To:* RE-wrenches *Subject:* [RE-wrenches] copper roof Dear Wrenches, We installed a PV system on a copper roof several years ago. We used brass S5!-U clamps on standing seam and aluminum racking. We are now noticing some discoloration at the drip-line below the modules. See photos here: https://picasaweb.google.com/109634809794570027207/CopperRoof?authuser=0&authkey=Gv1sRgCMv8n6rCl8e8Sw&feat=directlink There is also a fair amount of discoloration from bird droppings but that doesn't seem to be the cause of the spots under the modules. Does any know what's happening here, whether to be concerned about corrosion, and how to prevent this in the future? -- Nicholas Ponzio Building Energy 1570 South Brownell Road Williston, VT 05495 802-859-3384 ext.15 (office) 802-318-4783 (cell) http://www.BuildingEnergyVT.com
_______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Change email address & 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
