Re: [RE-wrenches] Plastic washers

Hi Jason, It's part of why I asked because I'm not sure the best material. I always thought of Epdm as pretty soft? If you have a supplier let us know Jay > On Jan 28, 2016, at 5:00 AM, Jason Szumlanski > wrote: > > If you are going to do it, have you

Re: [RE-wrenches] Plastic washers

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

Re: [RE-wrenches] Plastic washers

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 result for neoprene washers https://www.copperstate.com/shop/429/neoprene-washers Thanks, R.Ray Walters CTO, Solarray, Inc Nabcep

Re: [RE-wrenches] Plastic washers

We just had that same concern, but once you torque the connection down there was no noticeable movement. As someone else mentioned the plastics can be tough to hold up to UV, temperature, compression, and thermal cycling. Once that hard plastic cracks and falls out, you definitely will have

[RE-wrenches] Net 30 Terms scam to be aware of...

Wrenches, Quick heads up...I got a email ,supposedly from Ferris University in Michigan, wanting to purchase 70 Morningstar charge controllers on net 30 terms. I quick call to the actual procurement officer ended the deal as it was a hoax. I decided to take it a bit further and ask for references

Re: [RE-wrenches] Plastic washers

You can buy sheets and cut or stamp to size. http://www.mscdirect.com/industrialtools/epdm-rubber-sheet.html I'm sure there are pre-cut EPDM washers out there. EPDM is routinely bonded to washers and screw flanges for fastening brackets and metal roofing material, so I don't see why it would be

[RE-wrenches] Battery Box Construction

Hi All; We're looking to improve our battery box construction, and are considering using 1/8" think polypropylene sheeting. I've used small premade boxes before, but this will be for a HUP install, and we would want to build the box around the batteries after. Does anyone have experience/

Re: [RE-wrenches] Battery Box Construction

Ray, As an option for the plywood box with the 10 mil poly lining. You can do two layers of the poly liner and also protect it with two lengths of 1 x 3 wood strapping on the floor of the box to support the heavy batteries and protect the poly liner. I have done this for years with no problems.

Re: [RE-wrenches] Plastic washers

Yea its tough. I’m trying to make sure I do it right ( whatever that is at this point) and what the customer wants. I”ll check to see if this meets with his approval. Might be the way to go. Thanks for the update as to it being tight. I”m guessing here, but I can hear him say “ yes but that

Re: [RE-wrenches] Plastic washers

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

Re: [RE-wrenches] Plastic washers

t; >>>> www.re-wrenches.org/etiquette.htm > >>>> > >>>> Check out or update participant bios: > >>>> www.members.re-wrenches.org > >>>> > >>>> > >>>> ___ > >

Re: [RE-wrenches] Plastic washers

Chris, As only the threads of all SS bolts need anti-seize, there's a much neater method. Anti-seize is available in a solid twist-to-extend tube that is neat and easy to use. One light swipe across the make threads of each bolt - doesn't take much to prevent galling.

Re: [RE-wrenches] Battery Box Construction

Ray, Just a couple of weeks ago we installed a 24V HUP set in an existing installation. We had an existing plywood battery box made of Baltic Birch (the 9-ply 12mm thick plywood typically used for cabinet drawer carcases) with a liner made of 40(?)-mil pond liner

[RE-wrenches] 1000V rated 6AWG wire

Hello Friends! I am looking for 1000v rated #6awg wire suitable for running in conduit from roof top combiner down to the inverterwhat are others using for this application? Ideally I would love to find some THHN or THWN-2 but with 1000v ratingany suggestions, sources? Application is from

Re: [RE-wrenches] 1000V rated 6AWG wire

The cheapest solution I have been able to find for this over the past 12 months has been PV wire. The other problem you might find is 1000V listed components to transition from PV wire to other types of wire. Matt On Thu, January 28, 2016 7:48 am, Kirpal Khalsa wrote: > Hello Friends! > I am

Re: [RE-wrenches] Plastic washers

My hesitation to that is the compressibility of the neoprene. One of the things I like about nylon or similar hard plastics is they don’t compress so you do get a ridged structure. jay peltz power > On Jan 28, 2016, at 10:15 AM, Ray Walters wrote: > > I would use a SS

Re: [RE-wrenches] fusing requirement for 4 strings run to a Inverter with 2 MPPT's

While Brian T.  is correct that fusing is not required for string-to-string overcurrent protection with two strings into two channels, there is another reason to require fusing. Transformerless inverters like Fronius Primo have no transformer to provide AC-DC isolation, so a ground fault can allow

Re: [RE-wrenches] Plastic washers

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

Re: [RE-wrenches] Plastic washers

If you are going to do it, have you considered EPDM washers instead of plastic? Just a thought... I still wouldn't do it unless expressly endorsed by the manufacturer and/or engineer, but EPDM seems like a better option for longevity. ​Jason​ On Wed, Jan 27, 2016 at 8:44 PM, Jay

Re: [RE-wrenches] 1000V rated 6AWG wire

Hi Kirpal, Southwire makes 1000v rated USE up to 500MCM. Might want to oversize your conduit. Lotsa lube. Pat On Thu, Jan 28, 2016 at 7:48 AM, Kirpal Khalsa wrote: > Hello Friends! > I am looking for 1000v rated #6awg wire suitable for running in conduit > from roof top