Gravity only acts downward. The modules are rated to 113 PSF which is
with the module laying flat. If the module is at an angle, it can take
more downward force.
For instance if it is at 70 degree tilt, It could take a downward force
of 113 PSF / cos 70 or 330 PSF.
Its possibly reasonable to assume that the snow might not slide off, but
the total snow load is not going to act perpendicular to a tilted module.
If the AHJ wants to argue the point, ask him what the snow load
requirements are against a surface of a wall. A vertical surface would
only see wind loading, not snow loading.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 4/26/2015 2:32 PM, Dana wrote:
Nice rack!
However if the panels are not rated for more the 100-113 PSF, the
design is still not acceptable if the AHJ wants 420 PSF right?
Q – What is the stoutest PV module out there?
----------------------------------------------------------------------------
Dana Orzel
Great Solar Works, Inc - NABCEP # 051112-136
E - [email protected] - Web - solarwork.com
O - 970.626.5253 C - 208.721.7003
"Responsible Technologies for Responsible People since 1988"
*P*Please consider the environment before printing this email.
*From:*RE-wrenches [mailto:[email protected]]
*On Behalf Of *Jonathan Hill
*Sent:* Saturday, April 25, 2015 5:33 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Extreme snow load ground mount?
Lars-
What Bill said. Done it several times without incident.
Jonathan Hill, senior solar applications engineer
530-559-3781
[email protected] <mailto:[email protected]>
On Apr 25, 2015, at 12:48 PM, Dana <[email protected]
<mailto:[email protected]>> wrote:
What is the highest PV module snow rating? 113 PSF is the highest
I have seen I here in CO & ID 100 is the highest required .
__________________________________________________________
*Dana Orzel*
Great Solar Works, Inc - *NABCEP # 051112-136*
[email protected] <mailto:[email protected]> -www.solarwork.com
<http://www.solarwork.com/>
*O*- 970.626.5253 *F*- 970.626.4140 c*-*208.721.7003
*_"Responsible Technologies for Responsible People since 1988_**_" _*
*From:*RE-wrenches
[mailto:[email protected]]*On Behalf
Of*[email protected] <mailto:[email protected]>
*Sent:*Saturday, April 25, 2015 1:41 PM
*To:*RE-wrenches
*Subject:*Re: [RE-wrenches] Extreme snow load ground mount?
Would this work for you?
http://willpowerelectric.blogspot.com/p/h2e-is-harsh-to-extreme-solution.html
Bruce Fiero-RMI
<image002.jpg>
*Willpower Electric LLC*
4115 S Pacific Hwy
Medford, OR 97501-9103
*Phone:*541-535-3965
*Fax:*541-512-0061
*Email:*[email protected] <mailto:[email protected]>
*Web:*www.willpower-electric.com <http://www.willpower-electric.com/>
Oregon Electrical Contractor C681
CCB 191852
DUNS 191470363
NABCEP Certified PV
Trade Ally of Energy Trust of Oregon
Oregon Solar Tax Credit Certified Technician
*"I'd put my money on the sun and solar energy. What a source of
power! I hope we don't have to wait until oil and coal run out
before we tackle that." T. Edison, 1931*
-------- Original Message --------
Subject: Re: [RE-wrenches] Extreme snow load ground mount?
From: "frenergy" <[email protected] <mailto:[email protected]>>
Date: Fri, January 16, 2015 9:17 pm
To: "RE-wrenches" <[email protected]
<mailto:[email protected]>>
Lars,
Yes, the only way you can even consider an install like
this is a pole mount, with a steep tilt in the winter to shed
most of the snow. It would help to know if the place will be
used in the winter or summer and how big of an array in KW or
Sq Ft. Customer would have to understand that you cannot
guarantee it...there are some combinations of
wind-snow-temp-moisture that make snow cling to anything. If
this is permitted, start dropping off cookies to an engineer.
Bill
Where the Sierra meets the Cascades
----- Original Message -----
*From:*Lars Ortegren <mailto:[email protected]>
*To:*[email protected]
<mailto:[email protected]>
*Sent:*Thursday, January 15, 2015 11:30 AM
*Subject:*[RE-wrenches] Extreme snow load ground mount?
Wrenches,
I have a fun one for you. We have a couple of potential
clients who live in the high Sierra with a 420 LB design
snow load. After hunting around, not even a three rail
system comes close with any module I can find, so now I'm
looking for a pole top that will dump the snow, and still
handle 120 mph winds. Any ideas? I would just say sorry,
no solar for you,but like many of you I love a challenge.
--
*/Lars Örtegren/ President/*
California Solar Electric Company
<http://www.californiasolarco.com/>
PO Box 480/149 E.Main St
Grass Valley, CA 95945
Phone : (530)274-3671 Fax: (530)274-7518
*/California C-10 Electrical Contractor #779624/*
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