[RE-wrenches] Seasonal Adjusters

[jason pozner]

We prefer pole mounts as well for ease of adjust ability, simple to brush
off, and can accommodate our 55deg winter tilt.  We like DPW as well.  If
the client or site is stuck on the roof mount we always go flush and try to
keep the array as high on the roof as we can while still giving a little
space for wind sheer.  We have seen snow build up on the back side of the
array (north) that gets shaded and begins to ice dam.  If unmaintained in
the right conditions you could get buildup and stress behind the array.  The
solution is maintenance and the right client will shovel their roof behind
the tilted modules.  We partnered on a job like Jay talked about  I attached
a pic of that job.  It works great!  We simply welded brackets along the
pole and attached to the side of the cabin.  Also attached a pic of  some
roof damage on a unmaintained roof valley. Both jobs are at about 10,500'
Irwin CO.

On Sat, Aug 15, 2009 at 7:51 PM, R. Walters <walters at taosnet.com> wrote:

>
> On Aug 15, 2009, at 6:49 PM, jay peltz wrote:
>
>  I don't have a photo, but have seen a pole mount, in the ground, run up
>> the side of the building, supported by the building by a bracket,  which can
>> mount a tracking or non tracking pole mount.
>>
>
>  jay
>>
>>
>
> We've done mounts like this before, when the roof was too sketchy to mount
> to, or an off grid system with a roof not facing close enough to south. It
> works pretty well: no penetrations or loading on the roof, still allows one
> bolt  tilt adjust,  azimuth to due south regardless of building orientation,
> etc.
> We normally would sit the pole in concrete, and then attach it with
> unistrut to the wall in a couple of spots. The unistrut would be long enough
> to catch 2 or 3 wall studs, and then attach to the pipe with  a 6" unistrut
>  clamp.
> As better roof mounting products have become available, we have been moving
> away from this method. Also, Grid tie just isn't near as critical for panel
> orientation, where as a small off-grid system in the winter really needs to
> be tilted to at least 30 deg, and within 20 deg of south to work right.
> Funny teaching us old off gridders to quit tilting, etc. with grid tie.
> Bill Brooks had some humorous examples of off grid sensibility applied in
> very ugly fashion to grid tie systems. At some point, I think NABCEP should
> consider separate certifications, as Off grid and grid tie have such
> different design requirements.
>
> Ray Walters
>
> _______________________________________________
> List sponsored by Home Power magazine
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Options & 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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090816/51159afd/attachment-0003.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: P1010014.JPG
Type: image/jpeg
Size: 923710 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090816/51159afd/attachment-0006.jpe>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: P1010011.JPG
Type: image/jpeg
Size: 916003 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090816/51159afd/attachment-0007.jpe>