[RE-wrenches] Fwd: Re: Cantilevered array

Fri Jan 19 12:06:52 PST 2024

I've done a fair amount of roof mounted solar structural compliance, and 
I would say that the cantilevered design looks like a disaster waiting 
to happen. You could not use conventional solar racking products.  Chris

On 1/13/2024 12:42 PM, William Miller via RE-wrenches wrote:
>
> Drake
>
> My earlier reply may have been a bit facetious.  What I meant by it 
> was that big-box solar contractors can be lazy when it comes to solar 
> design.  They will rely totally on satellite imagery and not check the 
> design on the ground.  This is how you get solar proposed for shaded 
> areas, where skylights and roof vents are located, or overhanging thin 
> air.  This may be what is happening in the image you shared.
>
> What is unique here is someone actually specified overhanging panels.  
> Looking more closely at the image, a roof outline is shown but it is 
> not clear that the outline is actually situated over a building.  It 
> almost looks like there is landscaped area inside the outline.
>
> The solution of course is to get on out there, measure the roof and 
> any obstructions and analyze the shading.  I use the Sun Seeker 
> <https://apps.apple.com/us/app/sun-seeker-tracker-surveyor/id330247123> 
> app for IOS for the shading analysis.
>
> William
>
> Miller Solar
>
> 17395 Oak Road, Atascadero, CA 93422
>
> 805-438-5600
>
> www.millersolar.com <http://www.millersolar.com/>
>
> CA Lic. 773985
>
> *From:*RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] 
> *On Behalf Of *Drake Chamberlin via RE-wrenches
> *Sent:* Saturday, January 13, 2024 8:47 AM
> *To:* RE-wrenches
> *Cc:* drake.chamberlin at redwoodalliance.org
> *Subject:* [RE-wrenches] Fwd: Re: Cantilevered array
>
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>
> Here is a larger snip of the situation.
>
> mailbox:///C:/Users/Chris%20Warfel/AppData/Roaming/Thunderbird/Profiles/lgcjo68n.default-release/Mail/Local%20Folders/WRENCHES?number=4062&header=quotebody&part=1.1.2&filename=image001.png
>
> Label says overhang from upper roof.
>
> /Drake Chamberlin/
>
> /Athens Electric LLC/
>
> /Ohio Electrical Contractor’s License 44810/
>
> /NABCEP Certified PV Installation Professional/
>
> ---
>
> On 2024-01-12 07:29, Jason Szumlanski wrote:
>
>     Are you sure that's what you're looking at? To me, that looks like
>     there was an addition made to the house, and maybe it's a
>     multi-pitch roof. That lower part might be a covered wrap-around
>     porch.
>
>
>     Jason Szumlanski
>
>     Principal Solar Designer | Florida Solar Design Group
>     NABCEP Certified Solar Professional (PVIP)
>     Florida State Certified Solar Contractor CVC56956
>
>     On Thu, Jan 11, 2024 at 5:59 PM Drake Chamberlin via RE-wrenches
>     <re-wrenches at lists.re-wrenches.org> wrote:
>
>         I was given a drawing, produced by a very large solar company,
>         showing the array cantilevered over the edge of the roof by
>         several feet.
>
>         mailbox:///C:/Users/Chris%20Warfel/AppData/Roaming/Thunderbird/Profiles/lgcjo68n.default-release/Mail/Local%20Folders/WRENCHES?number=4062&header=quotebody&part=1.1.3&filename=image002.png
>
>         Notice how the array hangs out over the lawn for several feet.
>         Is there anyway that this is a legitimate way to mount modules?
>
>         Thanks,
>
>         Drake
>
>         /Drake Chamberlin/
>
>         /Athens Electric LLC/
>
>         /Ohio Electrical Contractor's License 44810/
>
>         /NABCEP Certified PV Installation Professional/
>
>         -- 
>
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-- 
             Christopher Warfel
                      ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                                 401-466-8978
<http://entech-engineering.com>

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