Our house is on the ocean, in the Caribbean. If you are using something like SnapNRack, where a stainless bolt goes through an aluminium channel nut, use Permatex or it will seize. Other than that, I have not seen racking corrosion in eight years on the roof. Put all the clamps, bolts, nuts etc, in a bucket and spray it all with Permatex anti seize. It will be messy but very effective. You'll have fingerprints on the modules but oh, well. On Jan 28, 2016 2:16 PM, "Ray Walters" <r...@solarray.com> wrote:
> I would use a SS washer with integrated Neoprene rubber gasket. We use > them on roof work, and Unirac uses them under the lag on their roof > flashings. > [image: Image result for neoprene washers] > https://www.copperstate.com/shop/429/neoprene-washers > > Thanks, > > R.Ray Walters > CTO, Solarray, Inc > Nabcep Certified PV Installer, > Licensed Master Electrician > Solar Design Engineer303 505-8760 > > On 1/28/2016 8:25 AM, Jay wrote: > > Hi Larry > > I wasn't planning on installing anything between al and al. Just between > SS and al. So the module will still be bolted directly to the al rack > material. I'm not too worried about the grounding, and certainly not > worried enough to install lay in lugs with copper to each module. > > As lones pointed out, there are parts that would insulate the bolt. > But as the owner hasn't requested that, not going to suggest it! > > I sure didn't plan on stirring the pot like this. > Just really wanted some help on sourcing the washers > > Thanks > > Jay > Peltz power > > On Jan 28, 2016, at 6:49 AM, Starlight Solar Power Systems < > la...@starlightsolar.com> wrote: > > Hey Jay, > > I’m still trying to picture this and had a thought: If you isolate the > module from the rack electrically with these washers, and both are > grounded, and the two grounds are not at the same potential (different > length ground runs), you may be creating a path for high voltage into the > array in event of a near lightning strike. > > Also, if the washer is between the two metals, how will you isolate the > bolt that puts them together from not touching the sides of the holes? > Perhaps you need to look into non-conductive fasteners as well. > > Larry Crutcher > Starlight Solar Power Systems > > > > > On Jan 27, 2016, at 6:44 PM, Jay <jay.pe...@gmail.com> wrote: > > Ok here is the long form. > > Customers system is in Mexico, Baja. So I'm not concerned about legal > issues. > It is a custom racking design to fit his house. > Flat concrete roof,low tilt design with extra heavy duty engineering for > hurricanes. Easy access for future MX of all fasteners > Owner lives on his own island in the South Pacific. > This is his 2nd ( more?) house. > > He wants this. I've told him all of what you all and have said including > that there will need to be future mx to check bolt tightness. > > I am going to do it for him. > Thanks for all the advice on where to get look for the parts he's looking > for. > > Jay > > Peltz power. > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & > settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette:www.re-wrenches.org/etiquette.htm > > Check out or update participant bios:www.members.re-wrenches.org > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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