US20060266352A1 - Self-ballasting solar array mount - Google Patents
Self-ballasting solar array mount Download PDFInfo
- Publication number
- US20060266352A1 US20060266352A1 US11/142,081 US14208105A US2006266352A1 US 20060266352 A1 US20060266352 A1 US 20060266352A1 US 14208105 A US14208105 A US 14208105A US 2006266352 A1 US2006266352 A1 US 2006266352A1
- Authority
- US
- United States
- Prior art keywords
- beams
- panel
- panels
- angle brackets
- rooftop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
- F24S25/61—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing to the ground or to building structures
- F24S25/617—Elements driven into the ground, e.g. anchor-piles; Foundations for supporting elements; Connectors for connecting supporting structures to the ground or to flat horizontal surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S25/10—Arrangement of stationary mountings or supports for solar heat collector modules extending in directions away from a supporting surface
- F24S25/16—Arrangement of interconnected standing structures; Standing structures having separate supporting portions for adjacent modules
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
- F24S25/63—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing modules or their peripheral frames to supporting elements
- F24S25/632—Side connectors; Base connectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S2025/01—Special support components; Methods of use
- F24S2025/02—Ballasting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S2080/01—Selection of particular materials
- F24S2080/015—Plastics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/80—Accommodating differential expansion of solar collector elements
- F24S40/85—Arrangements for protecting solar collectors against adverse weather conditions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
Definitions
- Beams 122 , 124 rest on rooftop 112 without the need for any mechanical fasteners to penetrate the roofing material of rooftop 112 or adhesives to bond to it. Instead, beams 122 , 124 are kept in contact with rooftop 112 by their ballast weight and a lesser amount of ballast weight provided by solar panels 132 , 134 .
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Photovoltaic Devices (AREA)
Abstract
A solar panel installation includes a number of solar panels supported by two or more beams that are arranged parallel to each other on the surface of a roof. Each panel is arranged across and supported by multiple ones of the beams. The combined weight of the beams at least equals the combined weight of the panels, which permits the use of panels that are lighter and easier to handle than ones whose weight forms the bulk of the ballast. For example, the beams advantageously can have about twice as much combined weight as the combined weight of the panels. Various aspects and variations are also disclosed.
Description
- The invention involves the field of roof-mounted solar panels for buildings, useful for converting sunlight into electrical or thermal energy.
- Flat building roofs are often highly desirable locations for mounting solar panels, i.e., planar devices for collecting solar energy and converting it to electrical or thermal form. Such energy conversion in solar panels can be accomplished using a variety of systems, including photovoltaic cells, liquid-heating systems, or other systems (the energy conversion method employed by the panels is not material to this invention). Flat rooftops often have large amounts of unused area with unobstructed exposure to sunlight. But it is generally considered undesirable to mount solar panels on flat roofs with any kind of hardware that requires penetration of the roofing material, e.g., screws or bolts. Accordingly, for example, U.S. Pat. No. 5,746,839 to Dinwoodie discusses a light weight, self-ballasting solar cell roofing assembly, purportedly eliminating the need for roof membrane penetrations for hold-down.
- In the roofing assembly of the Dinwoodie patent, a photovoltaic module performs the multiple functions normally provided by a roofing paver, including ballast. However, photovoltaic modules that are heavy enough to provide the ballast needed for mounting without penetrating the roofing are difficult to transport onto rooftops for installation.
- Accordingly, it would be desirable to have a way of mounting solar panels on rooftops without penetrating the roofing material with mounting hardware and without increasing the weight of the solar panels for ballast purposes to a point where they are unwieldy and difficult to install.
- A solar panel installation according to various aspects of the invention includes a number of solar panels supported by two or more beams that are arranged parallel to each other on the surface of a roof. Each panel is arranged across and supported by multiple beams. The combined weight of the beams at least equals the combined weight of the panels, which permits the use of panels that are lighter and easier to handle than ones whose weight forms the bulk of the ballast. For example, the beams advantageously can have about twice as much combined weight as the combined weight of the panels.
- The system can include a number of short angle brackets connected to one of the beams and to the panels, and a number of longer angle brackets connected to another one of the beams and to the panels. The short angle brackets connect near one edge of each panel, and the longer ones connect near an opposite edge. Preferably, a pair of each type of bracket connects to each panel. The longer angle brackets support the panels at a substantially greater height above the beams than the short angle brackets. Thus, in embodiments with such angle brackets, the panels are tilted at a desired angle from horizontal. As a result, rainwater flows off the panels more easily and increased solar energy density falls on the panel surfaces in non-equatorial latitudes.
- The beams can consist substantially of high-density polyethylene, a relatively inexpensive and durable substance. Advantageously, the primary component of the beams can be reclaimed post-consumer high-density polyethylene, which is appealing from an environmental standpoint.
- The above summary does not include an exhaustive list of all aspects of the present invention. Indeed, the inventor contemplates that the invention includes all systems and methods that can be practiced from all suitable combinations of the various aspects summarized above, as well as those disclosed in the detailed description below and particularly pointed out in the claims. Such combinations have particular advantages not specifically recited in the above summary.
-
FIG. 1 is a partial perspective view of a solar panel installation according to various aspects of the invention. -
FIG. 2 is a side view of the system ofFIG. 1 . -
FIG. 3 is a top view of the system ofFIG. 1 . -
FIG. 4 is a side view of an angle bracket employed in the system ofFIG. 1 . - A self-ballasting solar panel mounting system according to various aspects of the present invention advantageously provides a stable base for solar panels on a rooftop while avoiding the need to penetrate the roofing material of the rooftop with mounting hardware such as bolts or screws.
FIG. 1 illustrates anexemplary system 100 in which twosolar panels beams flat roof surface 112.Rooftop 112 may sit atop a residential, commercial, industrial, or public building of any sort. -
Beams rooftop 112 without the need for any mechanical fasteners to penetrate the roofing material ofrooftop 112 or adhesives to bond to it. Instead,beams rooftop 112 by their ballast weight and a lesser amount of ballast weight provided bysolar panels - To develop more electrical power than the quantity produced by
panels beams beams - One advantageous configuration (not shown) includes multiple (e.g., a total of five) collinear pairs of beams, like
beams panels -
Exemplary beams FIG. 1 illustratesbeams panels beams panels - Each one of
beams Solar panels system 100 in contact withrooftop 112, even during a full range of ordinarily anticipated weather conditions (including expected peak wind speeds). - For clarity,
FIG. 1 illustratesoptional parapets rooftop 112. However, the ballast provided primarily bybeams system 100 securely mounted onrooftop 112 even without any wind shielding thatparapets - Beams of a solar panel mounting system of the invention can be fabricated from any suitably dense material, such as high-density polyethylene. A particularly advantageous type of high-density polyethylene for fabrication of the beams is available as compressed structural units of reclaimed post-consumer waste. For example, sections of plastic lumber such as that marketed by Polywood, Inc. of Edison, N.J. can be employed. If desired, e.g., to comply with terms of a warranty on the roof surface, pieces of thin roofing membrane can be placed between the beams and the roof surface.
- As may be better understood with reference to the side view of
FIG. 2 , the solar panels ofsystem 100 are mounted abovebeams rooftop 112. As illustrated,solar panel 134 has a tilt of about 5 degrees from horizontal, which significantly improves the amount of solar energy per unit area falling onpanel 134 under most conditions in non-equatorial latitudes. The modest amount of tilt also avoids pooling of rainwater. It is limited to avoid presenting too much area from a horizontal perspective and consequent wind loading, and to limit lift that would develop from wind passing over and under the panel if tilted more. -
Angle brackets solar panel 134 tobeams FIG. 2 ,bracket 214 has avertical portion 410 that is 17.8 cm in length. The correspondingvertical portion 210 ofbracket 212 is only 7.6 cm in length. Thus, inexemplary system 100, the lower edge ofsolar panel 134 is 21.3 cm aboverooftop 112 and the higher side is 34.9 cm aboverooftop 112. Such tilts may also be varied in situations whererooftop 112 is not entirely flat, as needed to meet the demands of the system. - Except for the difference in dimensions,
angle brackets FIG. 2 andFIG. 4 illustratevertical portion 410 andhorizontal portion 420 ofbracket 214.Vertical portion 410 includes anelongated hole 412 for mountingbracket 214 tobeam 124 at a desired vertical position with reference to a mountingscrew 234 and washer 224 (FIG. 2 ). When plastic lumber is employed for fabrication ofbeam 124,screw 234 is preferably stainless steel. Asimilar screw 232 andwasher 222 are employed for attachment ofbracket 212 tobeam 122. Removal of screws from plastic lumber can be difficult, so any needed disassembly is best done by unbolting the solar panel from the bracket, and, if necessary, cutting the heads off the screws that attach the brackets to the beams. -
Beams solar panels FIG. 2 illustrates across-section 240 of a conduit containing wiring that conveys electrical current frompanels rooftop 112 is a part. As an alternative to conduit, small junction boxes (not shown) can be mounted on the beams next to some of the brackets that support the solar panels, as needed to provide electrical connections for the panels. - Installation of
system 100 onrooftop 112 can be performed as follows. First, a worker lays out the beams in the proper positions. Then, he or she loosely bolts four brackets to the underside of the frame of a solar panel. Then the solar panel is placed over the beams with supports for the top and bottom edge of the solar panel to hold them at the proper heights. Then the worker drives screws horizontally through the brackets into the beams. Then the bolts connecting the brackets to the solar panel frame are tightened. The process of bolting the brackets to the panels and to the beams is repeated for any additional panels to be mounted on the same beams. - Preferred dimensions of
system 100 may be better understood with reference toFIG. 3 and TABLE I below.TABLE I Structural Feature Preferred Dimension Panel length (L) 157.5 cm Panel width (W) 82.6 cm Separation (S) between panels 3.8 cm Beam center spacing (C) 109 cm - Other dimensions can be employed to accommodate the desired number of panels and beams, the dimensions of the panels to be supported, and the aesthetic goals for the installation.
- No one embodiment disclosed herein is essential to the practice of another unless indicated as such. Indeed, the invention, as supported by the disclosure above and in the originally filed claims, includes all systems and methods that can be practiced from all suitable combinations of the various aspects disclosed, and all suitable combinations of the exemplary elements listed. Such combinations have particular advantages, including advantages not specifically recited herein.
- Alterations and permutations of the preferred embodiments and methods will become apparent to those skilled in the art upon a reading of the specification and a study of the drawings. For example, three parallel beams can be employed instead of two in situations where lighter beams are desired for easier carrying or the solar panels are particularly wide. It can then be useful to use three beams instead of two. Such a configuration can maintain the desired ballast distribution, where the combined beam weight is at least as great as the combined weight of the panels they support.
- Accordingly, none of the disclosure of the preferred embodiments and methods defines or constrains the invention. Rather, the issued claims variously define the invention. Each variation of the invention is limited only by the recited limitations of its respective claim, and equivalents thereof, without limitation by other terms not present in the claim. For example, claims that do not call for any exact number of elements in a plurality, or any particular dimensions of such elements, are not limited to the specific dimensions and dual-beam configuration of
exemplary system 100. - In addition, aspects of the invention are particularly pointed out below using terminology that the inventor regards as having its broadest reasonable interpretation; the more specific interpretations of 35 U.S.C. § 112(6) are only intended in those instances where the terms “means” or “steps” are actually recited. The words “comprising,” “including,” and “having” are intended as open-ended terminology, with the same meaning as if the phrase “at least” were appended after each instance thereof. A clause using the term “whereby” merely states the result of the limitations in any claim in which it may appear and does not set forth an additional limitation therein. The conjunction “or” between alternative elements means “and/or,” and thus does not imply that the elements are mutually exclusive unless context or a specific statement indicates otherwise.
Claims (21)
1. An apparatus comprising:
(a) a plurality of beams arranged parallel to each other on the surface of a roof; and
(b) a plurality of solar panels, with each panel being arranged across and supported by multiple ones of the beams;
(c) wherein the combined weight of the beams at least equals the combined weight of the panels.
2. The apparatus of claim 1 wherein the beams have about twice as much combined weight as the combined weight of the panels.
3. The apparatus of claim 2 wherein the beams consist substantially of high-density polyethylene.
4. The apparatus of claim 3 wherein the beams consist primarily of reclaimed post-consumer high-density polyethylene.
5. The apparatus of claim 2 wherein the plurality of beams consists of two beams.
6. The apparatus of claim 5 wherein both beams are of like dimensions.
7. The apparatus of claim 6 further comprising:
(a) a plurality of first angle brackets connected to a first one of the beams and to the panels near a first edge of each panel; and
(b) a plurality of second angle brackets connected to the second one of the beams and to the panels near a second edge of each panel opposite the panel's first edge;
(c) wherein, for each panel, the first and second angle brackets support the panel at substantially different heights, such that the panel is significantly tilted from horizontal with respect to the surface of the roof.
8. The apparatus of claim 7 wherein a pair of first angle brackets and a pair of second angle brackets connects to each panel.
9. The apparatus of claim 7 wherein the second height is several times greater than the first height.
10. The apparatus of claim 9 wherein both beams are fabricated primarily of reclaimed post-consumer high-density polyethylene.
11. A method for mounting solar panels on a rooftop, comprising:
(a) placing on a rooftop a plurality of beam sections, parallel to each other; and
(b) mounting a plurality of solar panels on the beam sections, with each panel being arranged across and supported by multiple ones of the beam sections;
(c) wherein the combined weight of the beam sections at least equals the combined weight of the panels.
12. The method of claim 11 wherein the beam sections placed on the rooftop have about twice as much combined weight as the combined weight of the panels mounted thereon.
13. The method of claim 12 wherein the beam sections consist substantially of high-density polyethylene.
14. The method of claim 13 wherein the beams consist primarily of reclaimed post-consumer high-density polyethylene.
15. The method of claim 12 wherein placing the beam sections on the rooftop comprises placing two beams on the rooftop parallel to each other.
16. The method of claim 15 wherein both of the beam sections are of like dimensions.
17. The method of claim 14 further comprising, for each panel:
(a) connecting one or more first angle brackets to a first one of the beam sections;
(b) connecting one or more second angle brackets to the second one of the beam sections; and
(c) mounting the panel on the beam sections by connecting it to the first angle brackets near one of its edges and to the second angle brackets near an opposite one of its edges;
(d) wherein connecting the panel to the first and second angle brackets comprises mounting the panel such that its opposing edges connected to the angle brackets are at substantially different heights, such that the panel is significantly tilted from horizontal with respect to the surface of the roof.
18. The method of claim 17 wherein part (c) is performed after parts (a) and (b).
19. The method of claim 17 wherein parts (a) and (b) comprise connecting a pair of first angle brackets and a pair of second angle brackets to the panel.
20. A solar panel installation on a rooftop comprising:
(a) a plurality of solar panels; and
(b) mounting means, having at least as much combined weight as the combined weight of the solar panels, for supporting the solar panels on the rooftop under gale-force wind loading without substantial movement or reliance on penetrating mechanical attachment to the rooftop.
21. The solar panel installation of claim 20 wherein the solar panels are arranged in separate rows on the rooftop, supported by separate arrangements of the mounting means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/142,081 US20060266352A1 (en) | 2005-05-31 | 2005-05-31 | Self-ballasting solar array mount |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/142,081 US20060266352A1 (en) | 2005-05-31 | 2005-05-31 | Self-ballasting solar array mount |
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US20060266352A1 true US20060266352A1 (en) | 2006-11-30 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/142,081 Abandoned US20060266352A1 (en) | 2005-05-31 | 2005-05-31 | Self-ballasting solar array mount |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2933432A1 (en) * | 2008-07-01 | 2010-01-08 | Borgne Philippe Le | Flat solar panels installing method for horizontal roof of building, involves arranging panels one beside other so that roof is partially covered and panels arranged in side by side manner, share one support, and fixing panels with supports |
US20100212714A1 (en) * | 2009-02-20 | 2010-08-26 | Elie Rothschild | Modular solar racking system |
GB2483487A (en) * | 2010-09-09 | 2012-03-14 | Cel F Solar Systems Ltd | A solar panel mounting anchor adapted for a flat roof |
US20120137602A1 (en) * | 2009-05-15 | 2012-06-07 | F&F Vermogens Gbr | Holding and fastening device |
US8276330B2 (en) | 2008-12-12 | 2012-10-02 | Applied Energy Technologies | Modular solar panel racking system |
JP2014037701A (en) * | 2012-08-14 | 2014-02-27 | Nippon Steel & Sumitomo Metal | Solar cell panel support frame and photovoltaic power generation system |
US9057544B2 (en) | 2009-02-20 | 2015-06-16 | Elie Rothschild | Solar panel mounting system |
JP2015155624A (en) * | 2014-02-21 | 2015-08-27 | 株式会社ハイパーウェブ | Solar panel installing frame and installation method thereof |
US9267712B1 (en) * | 2011-03-01 | 2016-02-23 | Jonathan Port | Strap mount for solar panels |
USD752508S1 (en) * | 2014-11-10 | 2016-03-29 | Paul Bleck | Rooftop solar parapet |
WO2018071332A1 (en) * | 2016-10-10 | 2018-04-19 | Alion Energy, Inc. | Systems and methods for dual tilt, ballasted photovoltaic module racking |
US10270384B2 (en) | 2016-10-10 | 2019-04-23 | Alion Energy, Inc. | Systems and methods for dual tilt, ballasted photovoltaic module racking |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2933432A1 (en) * | 2008-07-01 | 2010-01-08 | Borgne Philippe Le | Flat solar panels installing method for horizontal roof of building, involves arranging panels one beside other so that roof is partially covered and panels arranged in side by side manner, share one support, and fixing panels with supports |
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