How do you deal with the rain gutters?
Drake Chamberlin
Media & Communication Action Project
https://m-cap.org/
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On 2024-02-08 16:46, Sky Sims via RE-wrenches wrote:
I've designed and installed several thousand cantilevered arrays over the last three decades and never had a single issue. Unfortunately, code changes have taken a turn for the worse in most jurisdictions and oftentimes disallow cantilevering.
Sky Sims
Https://EcologicalSystems.org
732-462-3858
On Jan 19, 2024, at 3:09 PM, Christopher Warfel via RE-wrenches
<re-wrenches@lists.re-wrenches.org> wrote:
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 [1] app for IOS for the shading analysis.
William
Miller Solar
17395 Oak Road, Atascadero, CA 93422
805-438-5600
www.millersolar.com [2]
CA Lic. 773985
From: RE-wrenches [mailto:re-wrenches-boun...@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.chamber...@redwoodalliance.org
Subject: [RE-wrenches] Fwd: Re: Cantilevered array
Here is a larger snip of the situation.
<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@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.
<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
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<cwarfel.vcf> _______________________________________________
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Links:
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[1]
https://apps.apple.com/us/app/sun-seeker-tracker-surveyor/id330247123
[2] http://www.millersolar.com/
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