Bifacial Solar Panels: Advantages and Disadvantages (500 Watt, Frameless)... * KYOKUSHO.COM

US9812590B2. Bifacial solar cell module with backside reflector. Google Patents

Publication number US9812590B2 US9812590B2 US13/660,292 US201213660292A US9812590B2 US 9812590 B2 US9812590 B2 US 9812590B2 US 201213660292 A US201213660292 A US 201213660292A US 9812590 B2 US9812590 B2 US 9812590B2 Authority US United States Prior art keywords cell module solar cell solar cells backsheet bifacial Prior art date 2012-10-25 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.) Active. expires 2035-01-07 Application number US13/660,292 Other versions US20140116495A1 ( en Inventor Sung Dug Kim Gabriela Bunea Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Maxeon Solar Pte Ltd Original Assignee SunPower Corp Priority date (The priority date 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 date listed.) 2012-10-25 Filing date 2012-10-25 Publication date 2017-11-07 2012-10-25 Application filed by SunPower Corp filed Critical SunPower Corp 2012-10-25 Priority to US13/660,292 priority Critical patent/US9812590B2/en 2012-11-20 Assigned to SUNPOWER CORPORATION reassignment SUNPOWER CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BUNEA, GABRIELA, KIM, SUNG DUG 2013-10-21 Priority to MX2015004891A priority patent/MX344461B/en 2013-10-21 Priority to JP2015539693A priority patent/JP6321666B2/en 2013-10-21 Priority to AU2013334912A priority patent/AU2013334912B2/en 2013-10-21 Priority to CN201910578345.8A priority patent/CN110277457A/en 2013-10-21 Priority to PCT/US2013/065971 priority patent/WO2014066265A1/en 2013-10-21 Priority to CN201910507315.8A priority patent/CN110246902A/en 2013-10-21 Priority to CN201380055843.5A priority patent/CN104904023A/en 2013-10-25 Priority to UY0001035102A priority patent/UY35102A/en 2013-10-25 Priority to ARP130103910A priority patent/AR093159A1/en 2014-05-01 Publication of US20140116495A1 publication Critical patent/US20140116495A1/en 2015-04-21 Priority to CL2015001015A priority patent/CL2015001015A1/en 2015-04-23 Priority to SA515360336A priority patent/SA515360336B1/en 2017-10-13 Priority to US15/783,234 priority patent/US10243087B2/en 2017-11-07 Publication of US9812590B2 publication Critical patent/US9812590B2/en 2017-11-07 Application granted granted Critical 2018-04-05 Priority to JP2018073482A priority patent/JP2018137465A/en 2019-01-29 Priority to US16/260,462 priority patent/US20190157468A1/en 2019-07-22 Priority to US29/698,989 priority patent/USD956680S1/en 2020-09-23 Priority to JP2020159043A priority patent/JP7040854B2/en 2023-01-24 Assigned to Maxeon Solar Pte. Ltd. reassignment Maxeon Solar Pte. Ltd. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SUNPOWER CORPORATION Status Active legal-status Critical Current 2035-01-07 Adjusted expiration legal-status Critical

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Classifications

H — ELECTRICITY
H01 — ELECTRIC ELEMENTS
H01L — SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
H01L31/00 — Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
H01L31/02 — Details

H — ELECTRICITY
H01 — ELECTRIC ELEMENTS
H01L — SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
H01L31/00 — Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
H01L31/04 — Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
H01L31/042 — PV modules or arrays of single PV cells
H01L31/048 — Encapsulation of modules
H01L31/049 — Protective back sheets

H — ELECTRICITY
H01 — ELECTRIC ELEMENTS
H01L — SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
H01L31/00 — Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
H01L31/04 — Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
H01L31/054 — Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
H01L31/0547 — Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection

H — ELECTRICITY
H01 — ELECTRIC ELEMENTS
H01L — SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
H01L31/00 — Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
H01L31/04 — Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
H01L31/054 — Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
H01L31/056 — Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means the light-reflecting means being of the back surface reflector [BSR] type

H — ELECTRICITY
H02 — GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02S — GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
H02S40/00 — Components or accessories in combination with PV modules, not provided for in groups H02S10/00. H02S30/00

H — ELECTRICITY
H02 — GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02S — GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
H02S40/00 — Components or accessories in combination with PV modules, not provided for in groups H02S10/00. H02S30/00
H02S40/20 — Optical components
H02S40/22 — Light-reflecting or light-concentrating means

H — ELECTRICITY
H01 — ELECTRIC ELEMENTS
H01L — SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
H01L31/00 — Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
H01L31/04 — Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
H01L31/042 — PV modules or arrays of single PV cells

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
Y02E10/50 — Photovoltaic [PV] energy
Y02E10/52 — PV systems with concentrators

Abstract

A bifacial solar cell module includes solar cells that are protected by front side packaging components and backside packaging components. The front side packaging components include a transparent top cover on a front portion of the solar cell module. The backside packaging components have a transparent portion that allows light coming from a back portion of the solar cell module to reach the solar cells, and a reflective portion that reflects light coming from the front portion of the solar cell module. The transparent and reflective portions may be integrated with a backsheet, e.g., by printing colored pigments on the backsheet. The reflective portion may also be on a reflective component that is separate from the backsheet. In that case, the reflective component may be placed over a clear backsheet before or after packaging.

Description

Embodiments of the subject matter described herein relate generally to solar cells. particularly, embodiments of the subject matter relate to solar cell modules.

Solar cells are well known devices for converting solar radiation to electrical energy. A solar cell has a front side that faces the sun during normal operation to collect solar radiation and a backside opposite the front side. Solar radiation impinging on the solar cell creates electrons and holes that migrate to diffusion regions, thereby creating voltage differentials between the diffusion regions. Metal contacts are formed to corresponding diffusion regions to allow an external electrical circuit, e.g., a load, to be connected to and be powered by the solar cell.

Solar cells may be serially connected and packaged together to form a solar cell module. The packaging provides environmental protection for the solar cells, and may include a top cover on the front side, an encapsulant that encapsulates the solar cells, and a backsheet that provides insulation on the backside. Embodiments of the present invention pertain to a backsheet and other backside packaging components that allow for increased solar radiation collection.

In one embodiment, a bifacial solar cell module includes solar cells that are protected by front side packaging components and backside packaging components. The front side packaging components include a transparent top cover on a front portion of the solar cell module. The backside packaging components have a transparent portion that allows light coming from a back portion of the solar cell module to reach the solar cells, and a reflective portion that reflects light coming from the front portion of the solar cell module. The transparent and reflective portions may be integrated with a backsheet, e.g., by printing colored pigments on the backsheet. The reflective portion may also be on a reflective component that is separate from the backsheet. In that case, the reflective component may be placed over a clear backsheet before or after packaging.

These and other features of the present invention will be readily apparent to persons of ordinary skill in the art upon reading the entirety of this disclosure, which includes the accompanying drawings and claims.

A more complete understanding of the subject matter may be derived by referring to the detailed description and claims when considered in conjunction with the following figures, wherein like reference numbers refer to similar elements throughout the figures. The drawings are not to scale.

FIGS. 2-4 are cross-sectional views schematically illustrating a method for making a bifacial solar cell module in accordance with an embodiment of the present invention.

FIG. 5 schematically shows an arrangement of solar cells in a bifacial solar cell module in accordance with an embodiment of the present invention.

FIG. 6 schematically shows a cross section of a bifacial solar cell module in accordance with an embodiment of the present invention.

FIG. 7 schematically shows another cross section of a bifacial solar cell module in accordance with an embodiment of the present invention.

FIG. 9 schematically shows a backsheet that is overlaid on solar cells on a back portion of a bifacial solar cell module in accordance with an embodiment of the present invention.

FIG. 10 schematically shows a backsheet in accordance with another embodiment of the present invention.

FIG. 11 schematically shows a backsheet that is overlaid on solar cells on a back portion of a bifacial solar cell module in accordance with an embodiment of the present invention.

FIG. 12 schematically shows a reflective component that is separate from a backsheet on a back portion of a bifacial solar cell module in accordance with an embodiment of the present invention.

FIG. 13 schematically shows a reflective component that is separate from a backsheet on a back portion of a bifacial solar cell module in accordance with another embodiment of the present invention.

In the present disclosure, numerous specific details are provided, such as examples of components, materials, and methods, to provide a thorough understanding of embodiments of the invention. Persons of ordinary skill in the art will recognize, however, that the invention can be practiced without one or more of the specific details. In other instances, well-known details are not shown or described to avoid obscuring aspects of the invention.

FIG. 1 shows a bifacial solar cell module 100 in accordance with an embodiment of the present invention. The bifacial solar cell module 100 is a so-called “terrestrial solar cell module” in that it is designed for use in stationary applications, such as on rooftops or by photovoltaic power plants. In the example of FIG. 1. the bifacial solar cell module 100 includes an array of interconnected solar cells 101. Only some of the solar cells 101 are labeled in FIG. 1 for clarity of illustration. In the example of FIG. 1. the solar cells 101 comprise backside contact solar cells. In a backside contact solar cell, all diffusion regions and metal contacts coupled to the diffusion regions are formed on the backside of the solar cell. That is, both the P-type and N-type diffusion regions and metal contacts coupled to them are on the backside of the solar cell. Embodiments of the present invention are especially advantageous when employed with backside contact solar cells, as they allow for collection of solar radiation from the backside that would otherwise be wasted. In other embodiments, the solar cells 101 may also be front side contact solar cells or other types of solar cells.

Visible in FIG. 1 are the front sides of the solar cells 101. The front sides of the solar cells 101 are also referred to as the “sun side” because they face towards the sun during normal operation. The backsides of the solar cells 101 are opposite the front sides. A frame 102 provides mechanical support for the solar cells 101. The front portion 103 of the bifacial solar cell module 100 is on the same side as the front sides of the solar cells 101 and is visible in FIG. 1. The back portion 104 of the bifacial solar cell module 100 is under the front portion 103. The back portion 104 of the bifacial solar cell module 100 is on the same side as the backsides of the solar cells 101. The bifacial solar cell module 100 is “bifacial” in that it allows for collection of solar radiation coming from the front portion 103 and the back portion 104.

FIGS. 2-4 are cross-sectional views schematically illustrating a method of making a bifacial solar cell module 100 in accordance with an embodiment of the present invention.

FIG. 2 is an exploded view showing the components of the bifacial solar cell module 100 in accordance with an embodiment of the present invention. The bifacial solar cell module 100 may comprise a transparent top cover 251, sheets of encapsulant 252, the solar cells 101, interconnects 254, and a backsheet 253. The backsheet 253 may be any single layer or multiple layers of materials that provide environmental protection to other components of the solar cell module 100. For example, fluoropolymer, polyvinylidene fluoride, polytetrafluoroethylene, polypropylene, polyphenylene sulfide, polyester, polycarbonate, or polyphenylene oxide may be used as a single layer or as part of multiple layers of backsheet. The encapsulant 252 on the front portion 103 is labeled as “252-1” and the encapsulant 252 on the back portion 104 is labeled as “252-2.” The transparent top cover 251 and the front side encapsulant 252-1 serve as front side packaging components, and the encapsulant 252-2 and the backsheet 253 serve as backside packaging components. In the example of FIG. 2. the transparent top cover 251 is the outermost front side packaging component and the backsheet 253 is the outermost backside packaging component.

The transparent top cover 251 and the encapsulant 252 comprise optically transparent materials. The transparent top cover 251, which is the topmost layer on the front portion 103, protects the solar cells 101 from the environment. The bifacial solar cell module 100 is installed in the field such that the transparent top cover 251 faces the sun during normal operation. The front sides of the solar cells 101 face towards the sun by way of the transparent top cover 101. In the example of FIG. 2. the transparent top cover 201 comprises glass (e.g., 3.2 mm thick, soda lime glass).

The encapsulant 252 is configured to protectively encapsulate the solar cells 101. In one embodiment, the encapsulant 252 comprises a high resistivity material configured to prevent solar cell polarization by preventing electrical charge from leaking from the front sides of the solar cells 101 to other portions of the bifacial solar cell module 100. In one embodiment, the encapsulant 252 presents a high resistance path to electrical charges to prevent charge leakage from the front sides of the solar cells 101 to the frame 102 or other portions of the bifacial solar cell module 100 by way of the transparent top cover 251. In the example of FIG. 2. sheets of high resistivity encapsulant 252 are placed on the front sides and backsides of the solar cells 101. In some embodiments, a sheet of high resistivity encapsulant 252 is only on the front sides of the solar cells 101. In those embodiments, the sheet of encapsulant on the backsides of the solar cells 101 is not a high resistivity encapsulant, such as poly-ethyl-vinyl acetate (“EVA”), for example.

The interconnects 254 may comprise a metal for electrically interconnecting the solar cells 101. In the example of FIG. 2. the solar cells 101 comprise serially-connected backside contact solar cells, and the interconnects 254 electrically connect to corresponding P-type and N-type diffusion regions on the backsides of the solar cells 101. In one embodiment, interconnect shields (e.g., see FIG. 7. shield 256) are placed on the interconnects 254 on the sun side to visually block the interconnects 254 when viewed from the front portion 103 and/or to provide a reflective surface to scatter, i.e., reflect at multiple angles, light coming from the front portion 103. Interconnect shields for solar cell applications are also disclosed in commonly-assigned U.S. Pat. No. 7,390,961, which is incorporated herein by reference in its entirety.

The backsides of the solar cells 101 face the backsheet 253. In one embodiment, the backsheet 253 comprises Tedlar/Polyester/EVA (“TPE”). The backsheet 253 may also comprise Tedlar/Polyester/Tedlar (“TPT”) or a multi-layer backsheet comprising a fluoropolymer, to name some examples. The backsheet 253 is on the back portion 104. As will be more apparent below, the backsheet 253 may comprise a backsheet printed with a reflective surface to reflect light that would otherwise escape towards the back portion 104.

In one embodiment, the transparent top cover 251, the encapsulant 252-1 on the front side, the solar cells 101 electrically connected by the interconnects 254, the encapsulant 252-2 on the backside, and the backsheet 253 are formed together to create a protective package. This is illustrated in FIG. 3. where the aforementioned components are formed together in a stacking order as shown in FIG. 2. particularly, the solar cells 101 are placed between the encapsulants 252-1 and 252-2, the backsheet 253 is placed under the encapsulant 252-2, and the transparent top cover 251 is placed over the encapsulant 252-1. The just mentioned components are then pressed and heated together by vacuum lamination, for example. The lamination process melts together the sheet of encapsulant 252-1 and the sheet of encapsulant 252-2 to encapsulate the solar cells 101. In FIG. 3. the encapsulant 252-1 and the encapsulant 252-2 are simply labeled as “252” to indicate that that they have been melted together.

FIG. 4 shows the protective package of FIG. 3 mounted on the frame 102. Being encapsulated in the encapsulant 252, the solar cells 101 are electrically isolated from the frame 102.

FIG. 5 schematically shows an arrangement of the solar cells 101 in the bifacial solar cell module 100 in accordance with an embodiment of the present invention. Only some of the solar cells 101 are shown for clarity of illustration. In the example of FIG. 5. the solar cells 101 are arranged in rectangular fashion in rows and columns. The solar cells 101 may be electrically connected in series by the interconnects 254 along a column. A column of solar cells 101 may be serially connected to an adjacent column of solar cells 101 at the ends of the columns (not shown). Of course, the solar cells 101 may also be interconnected by row.

Each solar cell 101 may be spaced apart from an adjacent solar cell 101 by about 2 mm on each side. As will be more apparent below, the space between solar cells 101 where there is no interconnect 254 may be covered by a reflective surface that is on the backsheet 253 (or other backside packaging component). For example, the space generally bounded by dotted lines 258 may have a corresponding reflective portion on the backsheet 253. The reflective portion may cover the area between sides of adjacent solar cells 101 (e.g., see sides 259) and the “diamond” area formed by four adjacent solar cells 101 (e.g., see diamond area 260).

FIG. 6 schematically shows a cross section of the bifacial solar cell module 100 in accordance with an embodiment of the present invention. FIG. 6 is taken from along a row of solar cells 101, where the sides are not connected by interconnects 254 (e.g., see section A-A of FIG. 5 ). In the example of FIG. 6. the solar cells 101 along a column are connected by interconnects 254 going into the page of the figure.

In one embodiment, the backsheet 253 has a reflective portion 253-1 and transparent portions 253-2. The reflective portion 253-1 provides a reflective surface for scattering light and the transparent portions 253-2 are clear to allow light to readily pass through. In operation, light coming from the front portion 103 may pass through the transparent top cover 251, the encapsulant 252, and onto the front sides of the solar cells 101 (see arrows 301). Light coming from the front portion 103 but passes between the solar cells 101 is reflected by the reflective portion 253-1 (see arrow 302) towards the front portion 103. Some of the reflected light, which would otherwise be wasted, eventually enters the front sides of the solar cells 101 (see arrow 302). Light coming from the back portion 104 enters through the transparent portions 253-2 (see arrows 303) and may eventually enter the backsides or front sides of the solar cells 101. The reflective/transparent design of the backsheet 253, or other backside packaging component employing such design, thus allows for increased solar radiation collection.

In one embodiment, the reflective portion 253-1 has an average reflectance of at least 30%, preferably 50%, more preferably 70% in all wavelengths between 400 nm and 1200 nm. For example, the reflective portion 253-1 may comprise white pigments (e.g., titanium dioxide, barium sulfate, and mixtures thereof). The reflective portion 253-1 may also comprise other materials, such as ultra violet (UV) stabilizers and/or heat stabilizers. Other suitable colors for the reflective portion 253-1 may include black, red, green, or other color for cosmetic purpose. In general, the material and color of the reflective portion 253-1 may be selected for optimum light scattering for a particular solar cell module. For example, even though silver may be an excellent reflector, a reflective portion 253-1 made of silver may not scatter enough light to be efficient because most of the reflected light may simply reflect straight out of the solar cell module. In that case, when using silver or other highly reflective material, the reflective portion 253-1 may be textured for optimum light scattering.

Reflective materials may be printed directly on a clear, i.e., completely transparent, backsheet 253. The printed portion forms the reflective portion 253-1 and portions where the reflective material is not printed form the transparent portions 253-2.

FIG. 7 schematically shows another cross section of the bifacial solar cell module 100 in accordance with an embodiment of the present invention. FIG. 7 is taken from along a column of solar cells 101 where there are interconnects 254 (e.g., see section B-B of FIG. 5 ). In the example of FIG. 7. a reflective interconnect shield 256 is placed towards the sun side to reflect light that would otherwise hit the front side of a corresponding interconnect 254. The reflective interconnect shield 256 may have the same properties and characteristics as the reflective portion 253-1 of the backsheet 253. In operation, light coming from the front portion 103 passes through the transparent top cover 251, the encapsulant 252, and onto the front sides of the solar cells 101 (see arrows 311). Light coming from the front portion 103 but passes between solar cells 101 is reflected by the interconnect shield 304 (see arrow 312) towards the front portion 103. Some of the reflected light, which would otherwise be wasted, eventually enters the front sides of the solar cells 101 (see arrow 312). Light coming from the back portion 104 enters through the transparent portions 253-2 (see arrows 313) and may eventually enter the backsides or front sides of the solar cells 101.

FIG. 8 shows the backsheet 253 in accordance with an embodiment of the present invention. In the example of FIG. 8. the reflective portion 253-1 is configured to cover space between solar cells 101 along only one dimension (e.g., between columns of solar cells 101) where there is no interconnect 254 between the solar cells 101. For example, the reflective portion 253-1 may be configured to cover from 80% to 300% (e.g., for alignment tolerance in manufacturing) of the space between sides of the solar cells 101, and diamond areas formed by four adjacent solar cells 101. The transparent portions 253-2 allow light to freely pass through the backsheet 253 and onto the solar cells 101. The transparent portions 253-2 may have an average optical transmission of at least 50%, preferably 70%, more preferably 90% in all wavelengths between 400 nm and 1200 nm.

FIG. 9 schematically illustrates the backsheet 253 overlaid on the solar cells 101 on the back portion 104 of the bifacial solar cell module 100 in accordance with an embodiment of the present invention. The example of FIG. 9 shows the bifacial solar cell module 100 as seen from the back portion 104. The backsheet 253 is placed over the solar cells 101 (only some are labeled in FIG. 9 ) and are formed together by, for example, vacuum lamination. Some of the interconnects 254 connecting the solar cells 101 are labeled in FIG. 9 for reference purposes. The backsides of the solar cells 101 show through the transparent portions 253-2, while the space between adjacent columns of solar cells 101 are covered by the reflective portion 253-1.

In other embodiments, the reflective portion 253-1 may also cover the space between two dimensions, such as between columns and rows of solar cells 101. An example of this embodiment is shown in the backsheet 253A of FIG. 10. where the reflective portion 253-1 covers the space between solar cells 101 in both the vertical and horizontal dimensions. The reflective portion 253-1 surrounds each solar cell 101 in this embodiment. As before, the transparent portions 253-2 expose the backsides of the solar cells 101, allowing light coming from the back portion 104 to pass through. The reflective portion 253-1 also covers the space between the frame and adjacent solar cells 101 along two dimensions.

FIG. 11 schematically illustrates the backsheet 253A of FIG. 10 overlaid on the solar cells 101 on the back portion 104 of the bifacial solar cell module 100 in accordance with an embodiment of the present invention. The example of FIG. 11 shows the bifacial solar cell module 100 as seen from the back portion 104. The backsheet 253A is placed over the solar cells 101 (only some are labeled in FIG. 11 ) and are formed together by, for example, vacuum lamination. The backsides of the solar cells 101 show through the transparent portions 253-2, while the space between adjacent solar cells 101 and the space between solar cells 101 and the frame are covered by the reflective portion 253-1.

Integrating the reflective portion 253-1 with the backsheet 253 simplifies the manufacture of the bifacial solar cell module 100; the backsheet 253 already comes with the reflective and transparent portions. However, it is not necessary to integrate the reflective portion 253-1 with the backsheet 253. For example, a clear backsheet with no reflective portion may also be used. In that case, after creating the protective package, a separate white (or other colored) tape or other reflective component may be attached on the clear backsheet. An example of this embodiment is schematically illustrated in FIG. 12. where the transparent cover 251, the solar cells 101 encapsulated in the encapsulant 252, and the backsheet 371 are packaged together by, for example, vacuum lamination. The backsheet 371 comprises a completely clear backsheet that exposes the backsides of the solar cells 101 to receive light coming from the back portion of the bifacial solar cell module 100. A reflective component 372 with characteristics and pattern similar to the reflective portion 253-1 may be applied on the backsheet 371 after lamination. For example, the reflective component 372 may comprise white colored tape that is attached to the backsheet 371.

The reflective component 372 may also be placed between the clear backsheet 372 and the encapsulant 252-2 before packaging as shown in FIG. 13. The transparent cover 251, the encapsulants 252-1 and 252-2, the solar cells 101, the reflective material 372, and the backsheet 371 are thereafter formed together to create the protective package, e.g., by vacuum lamination.

Bifacial solar cell modules and methods for manufacturing same have been disclosed. While specific embodiments of the present invention have been provided, it is to be understood that these embodiments are for illustration purposes and not limiting. Many additional embodiments will be apparent to persons of ordinary skill in the art reading this disclosure.

Claims ( 9 )

a backsheet on a back portion of the bifacial solar cell module, the backsheet having transparent portions that expose backsides of the plurality of solar cells as viewed from the back portion and that allow light coming from the back portion of the bifacial solar cell module to enter through the transparent portions, the backsheet having an integrated reflective portion that reflects light coming from the front portion of the bifacial solar cell module, the backsheet being an outermost packaging component on the back portion of the bifacial solar cell module,

wherein the integrated reflective portion is continuous and the transparent portions are formed coplanar with the integrated reflective portion and within spaces defined by the integrated reflective portion.

The bifacial solar cell module of claim 1 wherein the plurality of solar cells comprises backside contact solar cells.

The bifacial solar cell module of claim 1 wherein the integrated reflective portion covers space between two adjacent solar cells only along one edge of the solar cells.

The bifacial solar cell module of claim 1 further comprising a frame providing mechanical support to the transparent top cover, the encapsulant, and the backsheet.

The bifacial solar cell module of claim 4 wherein the integrated reflective portion covers space between the frame and adjacent solar cells along two different edges of the solar cells.

The bifacial solar cell module of claim 1 wherein the integrated reflective portion covers space between two adjacent solar cells along two different edges of the two adjacent solar cells.

The bifacial solar cell module of claim 1 wherein the integrated reflective portion comprises white pigment on the backsheet.

The bifacial solar cell module of claim 1 wherein the integrated reflective portion covers a diamond area formed by four adjacent solar cells.

The bifacial solar cell module of claim 1. wherein the integrated reflective portion comprises a reflective material that is textured for light scattering.

US13/660,292 2012-10-25 2012-10-25 Bifacial solar cell module with backside reflector Active 2035-01-07 US9812590B2 ( en )

Priority Applications (17)

Application Number Priority Date Filing Date Title

US13/660,292 US9812590B2 ( en )	2012-10-25	2012-10-25	Bifacial solar cell module with backside reflector
CN201380055843.5A CN104904023A ( en )	2012-10-25	2013-10-21	Bifacial solar cell module with backside reflector
JP2015539693A JP6321666B2 ( en )	2012-10-25	2013-10-21	Double-sided solar cell module with back reflector
AU2013334912A AU2013334912B2 ( en )	2012-10-25	2013-10-21	Bifacial solar cell module with backside reflector
MX2015004891A MX344461B ( en )	2012-10-25	2013-10-21	Bifacial solar cell module with backside reflector.
CN201910578345.8A CN110277457A ( en )	2012-10-25	2013-10-21	Double-sided solar battery component with back reflector
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CN201910507315.8A CN110246902A ( en )	2012-10-25	2013-10-21	Double-sided solar battery component with back reflector
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ARP130103910A AR093159A1 ( en )	2012-10-25	2013-10-25	BIFACIAL SOLAR CELLS MODULE WITH BACK REFLECTOR
CL2015001015A CL2015001015A1 ( en )	2012-10-25	2015-04-21	Bifacial solar cell module with rear side reflector
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US16/260,462 US20190157468A1 ( en )	2012-10-25	2019-01-29	Bifacial solar cell module with backside reflector
US29/698,989 USD956680S1 ( en )	2012-10-25	2019-07-22	Solar cell module
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US11489488B2 ( en )	2018-04-13	2022-11-01	Nextracker Llc	Light management systems for optimizing performance of bifacial solar module
WO2019232233A1 ( en )	2018-05-30	2019-12-05	Flex Ltd.	Bifacial solar module
US20210408316A1 ( en )	2020-06-26	2021-12-30	Taka Solar Corporation	Solar cell systems and methods of making the same
US20210407739A1 ( en )	2020-06-26	2021-12-30	Taka Solar Corporation	Solar cell systems and methods of making the same
US11495414B2 ( en )	2020-06-26	2022-11-08	Taka Solar Corporation	Solar cell systems and methods of making the same
US11495415B2 ( en )	2020-06-26	2022-11-08	Taka Solar Corporation	Solar cell systems and methods of making the same

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Bifacial Solar Panels: Advantages and Disadvantages (500 Watt, Frameless)

Are the new bifacial solar panels about to eclipse traditional solar panels?

Many people argue that they might. But they also wonder, how do these differnt types of solar panels work? Do the advantages of bifacial solar panels overcome their disadvantages? And, what’s the difference in frameless and watt rating?

Researchers are constantly improving monofacial solar panels so that they can increase the amount of energy absorbed without increasing the size of the panel. Incremental advances have been made in this department but there’s only so much energy that can be produced from the same-sized package.

Utilizing both sides of the solar panel could be the solution.

Understanding how solar panels work and specifically how bifacial solar panels can enhance the performance can help you decide when purchasing a solar energy system to install.

This guide explains what you need to know.

How Do Solar Panels Work? (Solar Panels Definition)

Solar energy systems are generally manufactured from multiple wafer-thin layers of silicon cells connected together by electrical wiring.

They are then encased in a metal frame to form a panel with a glass or plexiglass front face that has a specific anti-reflective coating on it.

These individual panels are then connected together to form arrays and installed on rooftops or in sizable outdoor spaces so they can be angled toward the sun to maximize solar absorption.

During daylight hours, the solar cells, which are also known as photovoltaic cells, absorb and convert sunlight, commonly referred to as electromagnetic radiation.

into electrical energy by the use of an inverter.

An inverter is required to transform the direct current (DC) electricity produced by the solar cells in your panels into usable alternating current (AC) electricity suitable for household use.

Excess electricity that is not immediately consumed is then stored in a battery storage system.

The number of panels in the arrays will depend on the energy requirements of the premises, and sometimes the space available for installation.

The national average of the panels required to supply sufficient electricity to cater to all a household’s needs is between 17-21 panels, but not all rooftops can accommodate that quantity due to limited space.

The size of standard solar panel for residential properties is 5.4 feet by 3.25 feet, and weigh about 40 pounds each. When there are up to 21 of them arranged in an array a considerable amount of space would be needed.

Under any form of space restrictions, options are limited to either installing other arrays on another part of the property or installing larger, more powerful solar panels that will still have space constraints.

These types of solar panels are classed as being monofacial and the basics of how they function rely on the front face of the panel, 1 where solar radiation is absorbed, directly facing toward the sun for the majority of the day.

This is often achieved through a tracking system that moves and angles the modules on a predetermined setting based on the sun’s movement across the sky.

Bifacial solar panels can do that and more.

What Are Bifacial Solar Panels? (Bifacial vs Monofacial Solar Panels)

Bifacial solar panels use identical silicon-based solar cells to monofacial solar panels.

There is no difference there.

They are both manufactured either from monocrystalline or polycrystalline cells, with the former being more expensive but more efficient at energy capture and conversion.

Monofacial solar panels, however, have one glaring fault that bifacial panels resolve quite cleverly, and that difference enables the bifacial solar panel’s efficiency level to be greater by 15% to 30%.

This increase in efficiency is because the majority of solar panels in use today only collect light and transform it into electricity when they are pointing toward the sun. They are effective to a large degree but a significant percentage of invisible light rays pass through the cells without being absorbed and are wasted.

Researchers behind the bifacial technology examined methods of harnessing those invisible rays and redirecting them back into the cells. They reasoned that if the unused underside of a solar panel could convert those uncaptured infrared rays that more electricity might be produced.

So, rather than having an opaque back plate, bifacial panels have a reflective material on the back that not only redirects any light that passes through the sun-facing monocrystalline cells but absorbs any light refracted from the ground, converting it into energy.

Although most of the sunlight is still absorbed by the panel’s front, some bifacial PV systems can produce up to 30% more energy since they expose both sides of the solar cells to sunlight.

Frameless Bifacial Solar Panels

Another primary difference between bifacial and monofacial panels is the framing.

The traditional framing for solar arrays is composed of aluminum, a material that has been used for decades due to its durability and lightness.

There are many consumers that simply do not like the image presented when silver-framed panels are installed on their rooftops, deeming them unsightly.

Bifacial solar panels keep the solar cells in place with two panes of glass and a reflective back plate and are often frameless.

This design allows them to be fully transparent and have a more exposed surface area, enabling the solar cells to capture more sunlight from both the front and the back. 2

Still, many neighborhood HOAs are against unsightly rooftop solar arrays, actively campaigning against anyone installing them despite the benefits to the homeowner and the planet.

Bifacial arrays are more pleasing to the eye aesthetically when rooftop mounted, yet they are more effective when placed next to highly reflecting surfaces that can bounce light back onto the underside of the panels.

This can be installing bifacial solar panels on roof that are flat, in ground-mounted locations, on pergolas, or on lean-tos to replace the actual wooden roof slats themselves.

As long as the ground underneath has reflective properties the bifacial panels will absorb more light and produce more electricity than monofacial arrays.

This creates an advantage of bifacial solar panels vs monocrystalline panels that have only one absorbing face.

If a bifacial panel can generate more energy than a typical solar panel it would mean that less of them would be required to fully power an average household, which would result in less space requirements.

0 and 500-Watt Bifacial Solar Panels vs 500-Watt Monofacial Solar Panels

Several manufacturers have started to offer 500-watt solar panels to residential premises in an effort to boost the output without claiming more real estate which is often a barrier to new clients with space restrictions.

(Image: National Renewable Energy Laboratory 11 )

Under ideal conditions, these larger panels will be able to generate more electricity on a daily basis than smaller wattage panels. On average, 2 kWh would be produced from each panel, and approximately 14-15 of them would be sufficient for an average residence rather than the 17-21 required to power a house now.

Related Reading : How Many Solar Panels to Power a House (For Every Size, Type, Location)

Unfortunately, the size and weight are increased, with an additional 30 pounds and a new size of 7.40 feet by 3.72 feet, but the configuration is smaller which makes the PV arrays more convenient to a wider consumer base.

500-watt bifacial solar panels are fractionally smaller, yet slightly heavier due to the extra glass layer, but will have a greater energy output of between 15% to 30% determined by the local conditions.

A total of 15 monofacial panels produce 2 kWh per day each, producing 30 kWh a day, 840 kWh a month, and 10,080 kWh a year.

A standard residential property needs 10,649 kWh a year to function independently from the local grid systems. 3

If the average increase in energy output from a bifacial solar panel is 25%, that would mean an additional 0.5kWh per day per panel. Although that may not seem significant, it has the possibility to augment the overall electricity production, reduce the number of panels installed, and save money.

Dividing the average residential property yearly kWh consumption of 10,649 by 2.5 would reveal a result of:

So instead of having to install 15 panels within the array, it would be possible to reduce that amount to 12 and still have the same amount of energy production.

Where this space-saving option would come into play if other energy dependant products, such as an electric car, were to be added to the system, which would require another 5 to 12 panels.

If the 500-watt panels are too big then the 400-watt bifacial solar panels could be used instead with equally impressive results.

Industrial Bifacial Solar Panels

Commercial industries are also examining the benefits that bifacial solar panels can bring to their bottom line.

(Image: Department of Energy 12 )

Some of these business owners may be concerned with climate change, but if they are in an industry that is energy-intensive, any option that can reduce those overheads has to be considered.

A brief glance at a solar panel size chart immediately shows the discrepancies in sizes between industrial solar panels and residential ones.

Compared to industrial solar panels, household solar panels are typically smaller and provide less power, and produce 300 to 400 watts of power per panel, occasionally 500 watts.

They are made to be set up in small-scale ground installations or on rooftops of homes to produce enough electricity to power an average family. These solar panels typically produce 300 to 400 watts of power per panel.

Industrial solar panels are bigger and provide more power, 700 watts per panel or more, and are installed in larger commercial business premises.

Solar farms are where the largest panels are used to maximize energy production and the land space available.

It would be a major achievement for a business of this type to be able to replace all of its conventional panels with ones that can absorb light from both faces and increase their energy production, the extra energy that they can then sell back to the grid for increased returns on their investments.

It’s no wonder that bifacial solar panels are becoming extremely popular for industrial-sized operations across the United States interested in saving money and mitigating climate change. 4

Bifacial Solar Panels Advantages and Disadvantages

There are pros and cons associated with bifacial solar panels, as with most things, but the advantages far outweigh the disadvantages.

(Image: National Renewable Energy Laboratory 11 )

You can check the details below:

Extra power comes with extra cost and bifacial solar panels generally cost at least 10% more than conventional panels
Installation is also more complicated, requiring special equipment due to the additional weight of the extra glass sheet per panel
The mounting structure is unique to the array format and cannot be interchanged between all types of other PV arrays
Installing them over grass or dirt would negate the advantage of the second face as no light would be reflected
Owing to the greater energy output fewer solar modules are required
Even when the intensity of the light is reduced towards the end of the day or not directly facing the panels, more light is absorbed compared to monofacial panels
Any diffused light reflected from nearby surfaces can be absorbed
The tempered glass-to-glass composition enhances the durability and longevity of the modules
There is a lower risk of degradation due to the improved production process and manufacturers are confident in issuing 30-year warranties
There is a lower risk of corrosion and microcracking.
Bifacial solar arrays are more pleasing to the eye whether placed on flat roofs or especially on angled lean-tos where they can become a charming feature
They will function more efficiently than monofacial panels when covered in snow because the second face will still be absorbing light
Whereas conventional panels work best at angles of 35° and 45°, bifacial panels can even be erected at 90° for maximum exposure to the sun from virtually all angles

How To Install Bifacial Solar Panels

Employing a company to install your newly purchased bifacial solar panels can be an expensive endeavor, especially if you have the know-how to do it yourself. It is not overly complicated and if you follow these simple steps you can be solar-powered in no time.

Flat roofs are the best options as long as there are no overhead obstructions such as trees or nearby buildings that will cast shadows over the panels.

Ground-mounted installations are more prone to being overshadowed but even if they are not it is important to ensure that the ground beneath them has a reflective surface; grass or dirt would nullify the advantage that bifacial solar panels have.

Pergolas attached to the property can either be another primary or secondary installation for this renewable energy provider if they can hold enough solar panels. 5

Many consumers concentrate solely on one location to install a PV system, but there is no reason why another site couldn’t be used as all wires would lead back to the storage system where the energy from the two sources would be accumulated.

Irrespective of the ultimate site selected for installation, there are a few fundamental steps that need to be adhered to for the two-sided panels to work effectively.

Ensure that the area is flat and clear of any debris that could interfere with the operation of the PV system
The racking system has to be positioned at a minimum height of 3-4 feet from the ground to allow sunlight to pass beneath from various angles. Do not install the panels flat onto a sloped roof as this will negate the benefit of having two solar absorbent surfaces
Position the racking so it, too, doesn’t interfere with any light penetration. New racking solutions use tiny junction boxes, narrower support rails, and vertical supports at the very corners of the racking system to reduce any shadowing beneath the modules
Be mindful when fastening any bolts on the modules to be aware of overtightening because of the sensitive nature of the glass
Allow a gap between the panels so any heavy snow will fall through and not accumulate between them.
If the surface is non-reflective or dark-colored, consider applying a white, reflective material, such as paint or an EPDM material on the ground
Connect to the inverter and then the local grid using the supplied solar panel connector types

Bifacial Solar Panels Advantages With Installations

Apart from the option of installing solar panels in two separate locations on a single property, another possibility often disregarded is taking advantage of available water surfaces like a lake or other bodies of water.

By the use of a floating racking system, the second face of bifacial solar panels will benefit enormously from the incredible reflective nature that can be achieved from the water’s surface.

The body of water does not have to be large to amplify the energy generated from the PV system, but the increase in electrical output will be noticeable.

In fact, bifacial panels can be a good solution if employed on any free-standing structures as long as the ground beneath will reflect sunlight back up to the under-face panels, 6 and awnings, pergolas of all shapes, and canopies are becoming popular choices.

Interesting Facts About Bifacial Solar Panels

Every new technological advancement appears to have been developed quickly, talked about one minute, and brought to market the next.

(Image: National Renewable Energy Laboratory 11 )

Rear-side irradiation is no different. Developers within the industry know differently, more than aware of the backstory to new technologies.

What other interesting unknown facts are there about these two-faced panels?

The first demonstration of the effectiveness of bifacial solar cells was in space. In 1974, the Salyut 3 in the Soviet Space program conducted an experiment that proved the superior energy generation properties over monofacial panels
Patents were filed in 1976, and 1977 by a renowned Spanish scientist, Antonio Luque Lopez, who is recognized as the inventor of the bifacial solar cell used today
In 1997, SunPower produced a prototype that showed a lot of commercial promise, but it never saw the light of day, and interest died down for the next few years
Incremental technological advances over the next decade culminated with the company, Yingli, a Chinese PV producer, selling the much-improved bifacial solar cells in 2012
Another decade later and the bifacial solar cell market accounts for over a 20% share of the PV industry

With decades in the making, the advantages of bifacial solar panels over monofacial panels are numerous.

They can be installed in similar locations to traditional panels but with an increased solar irradiation absorption capacity. 7 This results in higher energy levels delivered to both residential and commercial premises and a reduction in utility bills.

There can be no question that bifacial solar panels: advantages and disadvantages – 500 Watt, 400, frameless – are going to be around for a long time.

Are Bifacial Panels Suitable for Rooftops?

Sloping roofs are not suitable. To reap the benefits of bifacial solar panels, they need to be positioned no more than 13 feet from the ground or from a flat surface to better capture the refracted light rays.

What Is the Cost of Leasing Solar Panels?

After a down payment to the leasing company, the cost of leasing solar panels can be between 50 to 250 per month depending on energy requirements.

Where Are the Best Places to Mount Bifacial Solar Panels?

A raised platform with a minimum height of 3-4 feet that has full sun exposure is ideal, especially if the ground beneath is reflective.

Can Bsps Be Installed on Sloped Roofs?

As long as the panels are not installed flush with the tiles, they can still be effective on an angled rooftop.

How Long Do Bifacial Panels Last?

Manufacturers are giving 30-year warranties with the expected lifespan of these specific types of solar panels estimated to be around 50 years plus.

Are There Bifacial Panels Expensive?

Generally, BSPs are more expensive to purchase and install. However, the Biden administration has exempted this new sector from import tariffs for U.S. developers to make them competitive in the marketplace against monofacial panels.

What Incentive Programs Are There?

Incentive programs are available on a federal, state, and local level to reduce the purchase and installation costs to homeowners and business owners to save money and adopt solar energy.

Are Perovskite Solar Cells Better Than Silicon?

These hybrid organic-inorganic cells are potentially revolutionary since they have the potential to lower production costs and, 8 just as importantly, increase output. Combining them with bifacial solar panels could revolutionize the industry.

Solar Panel Connector Types Ranked, When to Use Each (And When Not To)

Solar Energy Facts That Could Change Civilization as We Know It (With Quotes)

Best Angle for Solar Panels ( Direction): Every State Zip (Azimuth Angle Calc)

Design Of Solar Panel System: See How It Actually Works (Photovoltaic System)

Do Solar Panels Need Direct Sunlight? No But It Matters (Big Time)

Does Solar Increase Home Value? Yes, But It’s Not That Simple (See How Much)

How Does a Solar Farm Work? Pros and Cons Solar Farmers (Acreage PV Power)

References

1 Solar Energy Technologies Office. (2023). Solar Photovoltaic Cell Basics. Office of ENERGY EFFICIENCY RENEWABLE ENERGY. Retrieved May 19, 2023, from

2 University of California Regents. (2023). Absorption / reflection of sunlight. UNDERSTANDING GLOBAL CHANGE. Retrieved May 19, 2023, from

3 University of Wisconsin-Stevens Point. (2023). Unit 1: Exploring Renewable Energy. Renewable Energy Education. Retrieved May 19, 2023, from

4 Friedlander, B. (2023, March 9). Returning solar panel production to US eases climate change. CORNELL CHRONICLE. Retrieved May 19, 2023, from

5 Morris, J. (2023, February 2). Renewable Energy. Climate Portal. Retrieved May 19, 2023, from

6 CONNIFF, R. (2021, November 22). Why Putting Solar Canopies on Parking Lots Is a Smart Green Move. YaleEnvironment360. Retrieved May 19, 2023, from

7 Coastal Systems Group. (2023). Solar Irradiation. WOODS HOLE OCEANOGRAPHIC INSTITUTION. Retrieved May 19, 2023, from

8 Solar Energy Technologies Office. (2023). Perovskite Solar Cells. Office of ENERGY EFFICIENCY RENEWABLE ENERGY. Retrieved May 19, 2023, from

10 Jana309. Attribution-ShareAlike 4.0 International (CC BY-SA 4.0). Changed Format, Resized. Wikipedia Commons. Retrieved from

11 National Renewable Energy Laboratory. NREL. Retrieved from

12 Department of Energy. Office of Scientific and Technical Information. Retrieved from

pvMB 3/22/19: The largest U.S. bifacial plant breaks ground, SunPower SEIA soft on Green New Deal, and more!

It’s Friday, so enjoy this pvMB before you check out for the weekend. In this edition the New Hampshire House has approved a 5 MW system size for net metering, an innovative green roof plus solar is coming to New York City and BP is considering power all U.S. operations with solar power.

Cypress Creek. Danner Boots advertisement

American’s largest bifacial solar project break ground – “RES has announced the start of construction on the Southern Oak Solar Project in the state of Georgia. The project, which was developed by Invenergy, will be America’s largest bifacial solar project to date. The solar energy output from the project, including all the renewable energy credits and environmental attributes, is sold to Georgia Power through Georgia Power’s Renewable Energy Development Initiative (REDI) program. Bifacial solar modules generate power from both sides of the panels. This allows project owners to make better use of available space by capturing additional solar energy within the same footprint. In addition to debuting LONGi’s bifacial modules, Southern Oak will also see the implementation of NEXTracker’s single axis tracker racking system.” Source: RES.

NY’s largest rooftop solar array coming to Javits Center – Siemens has been chosen as the developer of the largest rooftop solar plant in New York on the roof of the Javits Center, located on Manhattan’s West Side. The installation will clock in at 1.4 MW, and construction is expected to begin in early 2020. Developers have not yet ruled out battery storage associated with the project, so that could be on the way too. Source: Siemens

BP ponders solar purchasing to power U.S. operations – BP is looking to purchase solar in the United States in as little as the next six months. The purchases would come through Lightsource BP, a solar development company that BP partially owns. This comes less than a year after the company vowed to be more transparent with how its business aligns with the Paris climate accord. Source: Bloomberg

SunPower, SEIA not for Green New Deal – “U.S. solar and wind power companies may have the most to gain from the Green New Deal, an ambitious proposal backed by several Democratic presidential candidates to end U.S. fossil fuel consumption within a decade. But do not expect the renewable energy firms to endorse it… “If you just broadly endorse the Green New Deal, you are liable to upset one side of the aisle or the other. And that’s not constructive,” said Tom Werner, the CEO of SunPower Corp…“We love the enthusiasm the Green New Deal has brought to the climate issue … but we need to operate in political reality,” said Dan Whitten, vice president of public affairs at the Solar Energy Industries Association, the solar industry’s main lobby group.” Source: Reuters

Southwestern Indiana to get 50 MW – Indiana regulators have approved Vectren Energy Delivery of Indiana’s bid to construct a 50 MW plant in eastern Spencer County. The plant would be located on 300 acres and is anticipated to be fully operational by the end of 2020 Source: Vectren Corporation

MGE to expand shared solar.The popular Madison Shared Solar program, their community solar program, will be expanded thanks to a 5 MW solar project announced for the City of Middleton’s municipal airport. Eligible subscribers can sign up for as much as half of their annual electricity usage. Source: MGE

California judge proposes statewide renewable procurement – Arguing that current utility resource plans are not doing enough to meet state greenhouse gas reduction goals, a judge in California has proposed statewide procurement for renewable resources. The proposal would implement a statewide Preferred System Portfolio. This portfolio would outline and guide emissions reduction until 2030. Source: Utility Dive

Rocky Mountain Power proposes 600-battery apartment building among trio of Utah DSM projects – “PacifiCorp subsidiary Rocky Mountain Power (RMP) has asked the Public Service Commission of Utah for authorization to implement three “innovative utility programs”… The programs include a battery demand response project in a 600-unit multi-family development, and an intermodal transportation charging and power balancing system.” Source: Utility Dive

New “Ten Ways to go Solar” toolkit provides blueprint for Maine cities – Environment Maine Research and Policy Center has released a new toolkit: Ten Ways Your Community Can Go Solar. The toolkit details how cities can expand access to solar, remove obstacles in place for future installations, penetrate solar into previously underserved areas and act as a model for other communities that may want to make the switch to solar. The toolkit also has a corresponding webinar series, hosted by Environment Maine Research and Policy Center and Environment America. Source: Environment Maine

The New Hampshire House has passed an expansion of net metering to include projects up to 5 MW in capacity, although – as Madeleine noted to me on – it still has to pass the Senate and get the signature of the governor.

This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: editors@pv-magazine.com.

John Fitzgerald Weaver

Commercial Solar Guy is a commercial utility solar developer, general contractor for commercial and residential solar, as well a consultant. We construct projects in MA, RI, NY, and soon PA.

SunPower to launch 625 W shingled module

Group spinoff Maxeon Solar Technologies will produce the new Performance 5 modules with bifacial mono-PERC solar cells, made from large format eight-inch G12 wafers. The panels boast an efficiency of 21.2%.

SunPower, which is majority owned by French energy giant Total, is planning to launch a new shingled module series with 625 watts of power output.

Group spinoff Maxeon Solar Technologies will commercialize the Performance 5 line in the fourth quarter. The high-efficiency, bifacial mono-PERC solar panels will be made with large format eight-inch G12 wafers and will have an efficiency of 21.2%.

“Our release of the new SunPower Performance 5 panels comes along with a renewed commitment to large-scale installations supported by significant manufacturing capacity scale-up of shingled cell panel technology by our Huansheng Photovoltaic (HSPV) joint venture in China,” SunPower said.

Maxeon Solar Technologies is also owned by Tianjin Zhonghuan Semiconductor, which was recently acquired by TCL. one of China’s biggest electronics manufacturers. SunPower’ss HSPV joint venture with Zhonghuan will increase production capacity at its three factories in China from around 2 GW to 8 GW by 2021. The first of the three manufacturing facilities will be fully ramped up by the end of this year.

SunPower announced plans to spin off its manufacturing business into a new company last November. It also recently decided to sell its solar OM business to Canadian mid-market private equity firm Clairvest Group for an undisclosed sum.

This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: editors@pv-magazine.com.

Emiliano Bellini

Emiliano joined pv magazine in March 2017. He has been reporting on solar and renewable energy since 2009.

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https://pv-magazine-usa.com/2019/03/22/pvmb-3-22-19-largest-us-bifacial-plant-breaks-ground-solar-companies-soft-on-green-new-deal-much-more/
https://pv-magazine-usa.com/2020/07/27/sunpower-to-launch-625-w-shingled-module/

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Bifacial Solar Panels: Advantages and Disadvantages (500 Watt, Frameless)…

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Bifacial Solar Panels: Advantages and Disadvantages (500 Watt, Frameless)

How Do Solar Panels Work? (Solar Panels Definition)

What Are Bifacial Solar Panels? (Bifacial vs Monofacial Solar Panels)

Frameless Bifacial Solar Panels

0 and 500-Watt Bifacial Solar Panels vs 500-Watt Monofacial Solar Panels

Industrial Bifacial Solar Panels

Bifacial Solar Panels Advantages and Disadvantages

How To Install Bifacial Solar Panels

Bifacial Solar Panels Advantages With Installations

Interesting Facts About Bifacial Solar Panels

Are Bifacial Panels Suitable for Rooftops?

What Is the Cost of Leasing Solar Panels?

Where Are the Best Places to Mount Bifacial Solar Panels?

Can Bsps Be Installed on Sloped Roofs?

How Long Do Bifacial Panels Last?

Are There Bifacial Panels Expensive?

What Incentive Programs Are There?

Are Perovskite Solar Cells Better Than Silicon?

Solar Panel Connector Types Ranked, When to Use Each (And When Not To)

Solar Energy Facts That Could Change Civilization as We Know It (With Quotes)

Best Angle for Solar Panels ( Direction): Every State Zip (Azimuth Angle Calc)

Design Of Solar Panel System: See How It Actually Works (Photovoltaic System)

Do Solar Panels Need Direct Sunlight? No But It Matters (Big Time)

Does Solar Increase Home Value? Yes, But It’s Not That Simple (See How Much)

How Does a Solar Farm Work? Pros and Cons Solar Farmers (Acreage PV Power)

References

pvMB 3/22/19: The largest U.S. bifacial plant breaks ground, SunPower SEIA soft on Green New Deal, and more!

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John Fitzgerald Weaver

SunPower to launch 625 W shingled module

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Emiliano Bellini

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