ITBO20090647A1 - PLANT WITH HIGH PHOTOVOLTAIC PERFORMANCE PANELS. - Google Patents

PLANT WITH HIGH PHOTOVOLTAIC PERFORMANCE PANELS. Download PDF

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Publication number
ITBO20090647A1
ITBO20090647A1 IT000647A ITBO20090647A ITBO20090647A1 IT BO20090647 A1 ITBO20090647 A1 IT BO20090647A1 IT 000647 A IT000647 A IT 000647A IT BO20090647 A ITBO20090647 A IT BO20090647A IT BO20090647 A1 ITBO20090647 A1 IT BO20090647A1
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IT
Italy
Prior art keywords
mirror
photovoltaic
panel
panels
frame
Prior art date
Application number
IT000647A
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Italian (it)
Inventor
Wladimiro Bernardi
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Wladimiro Bernardi
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Filing date
Publication date
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Priority to ITBO2009A000647A priority Critical patent/IT1396128B1/en
Publication of ITBO20090647A1 publication Critical patent/ITBO20090647A1/en
Application granted granted Critical
Publication of IT1396128B1 publication Critical patent/IT1396128B1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/20—Supporting structures directly fixed to an immovable object
    • H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
    • H02S20/23—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
    • H02S20/24—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures specially adapted for flat roofs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/77—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with flat reflective plates
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared 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 infrared 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
    • 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
    • Y02B10/10—Photovoltaic [PV]
    • 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
    • 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

Description

Titolo: IMPIANTO A PANNELLI FOTOVOLTAICI DI RENDIMENTO ELEVATO Title: HIGH PERFORMANCE PHOTOVOLTAIC PANEL SYSTEM

DESCRIZIONE DESCRIPTION

La presente invenzione ha per oggetto un impianto a pannelli fotovoltaici avente un rendimento elevato rispetto a quello di struttura tradizionale. The present invention relates to a photovoltaic panel system having a high efficiency with respect to that of a traditional structure.

Com'Ã ̈ noto i pannelli fotovoltaici vengono disposti in modo da ottimizzare l'assorbimento dell'energia solare. Per aumentare il rendimento energetico, i pannelli sono montati su strutture mobili tali da consentire ai raggi solari di investire i pannelli con una incidenza angolare che garantisce il massimo rendimento. A questo scopo le strutture di supporto dei pannelli sono comandate mediante dispositivi cosiddetti di inseguimento che controllano l'orientamento dei pannelli in modo che l'incidenza dei raggi solari sui pannelli risulti tale da assicurare il massimo assorbimento di energia solare. As is known, photovoltaic panels are arranged in such a way as to optimize the absorption of solar energy. To increase the energy efficiency, the panels are mounted on mobile structures such as to allow the sun's rays to hit the panels with an angular incidence that guarantees maximum efficiency. For this purpose, the support structures of the panels are controlled by so-called tracking devices which control the orientation of the panels so that the incidence of sunlight on the panels is such as to ensure maximum absorption of solar energy.

Peraltro negli impianti fotovoltaici comprendenti pannelli statici, cioà ̈ supportati su strutture fisse, l'assorbimento di energia solare presenta notevoli carenze dovute al fatto che l'incidenza dei raggi solari, in seguito all'orbita relativa percorsa dal sole, subisce sensibili variazioni che determinano consistenti riduzioni dell'energia solare assorbita e conseguenti perdite di disponibilità elettrica fornita dai pannelli fotovoltaici. Moreover, in photovoltaic systems including static panels, i.e. supported on fixed structures, the absorption of solar energy has considerable shortcomings due to the fact that the incidence of solar rays, following the relative orbit traveled by the sun, undergoes significant variations which determine significant reductions in the solar energy absorbed and consequent losses of electrical availability supplied by the photovoltaic panels.

La presente invenzione ha pertanto lo scopo di proporre un nuovo dispositivo per la realizzazione di impianti fotovoltaici statici che consente di ovviare alle carenze di quelli noti in modo da raggiungere un rendimento sensibilmente maggiore di quello ottenibile negli impianti statici attualmente installati. The present invention therefore has the purpose of proposing a new device for the construction of static photovoltaic systems which allows to obviate the shortcomings of the known ones so as to achieve a significantly higher yield than that obtainable in the static systems currently installed.

Nell'ambito di tale compito costituisce uno scopo della presente invenzione la realizzazione di un dispositivo di semplice costruzione e quindi economico e di semplice installazione. Within the scope of this aim, an object of the present invention is to provide a device which is simple to construct and therefore inexpensive and simple to install.

Tale compito e tale scopo vengono ottenuti secondo l'invenzione con un impianto fotovoltaico a pannelli solari fotovoltaici e composto da dispositivi a pannelli fotovoltaici disposti su una superficie di supporto ed ordinati lungo almeno due file parallele ed a distanza costante fra di loro, caratterizzato dal fatto che ogni dispositivo comprende un'intelaiatura di sostegno composta da una base dotata di appoggi su detta superficie e da due piani che dalla base convergono ad inclinazione contrapposta verso l'alto formando un triangolo, sui detti piani essendo fissati due rispettivi pannelli fotovoltaici disposti anteriormente e posteriormente rispetto alla posizione di provenienza dei raggi solari, e lungo l'angolo di colmo dell'intelaiatura definito dai detti piani essendo posizionato uno specchio avente una superficie riflettente orientata verso il dispositivo sistemato davanti ad esso in modo che i raggi solari che investono lo specchio del pannello posteriore vengano riflessi contro il pannello posteriore del pannello anteriore. This task and this purpose are achieved according to the invention with a photovoltaic system with photovoltaic solar panels and composed of photovoltaic panel devices arranged on a support surface and ordered along at least two parallel rows and at a constant distance between them, characterized by the fact that each device comprises a support frame consisting of a base equipped with supports on said surface and two planes which converge from the base at an opposite inclination upwards forming a triangle, on said planes two respective photovoltaic panels arranged at the front and posteriorly with respect to the position of origin of the solar rays, and along the ridge angle of the frame defined by said planes, a mirror being positioned having a reflecting surface oriented towards the device arranged in front of it so that the solar rays investing the mirror of the rear panel are reflected contr or the rear panel of the front panel.

Ulteriori vantaggi e caratteristiche risulteranno maggiormente dalla descrizione che segue di una forma di esecuzione, illustrata a titolo esemplificativo, non esclusivo nell'unito disegno in cui: Further advantages and characteristics will become clearer from the following description of an embodiment, illustrated by way of example, not exclusive to the attached drawing in which:

la figura 1 mostra una vista in alzato di una porzione di un impianto statico fotovoltaico; Figure 1 shows an elevation view of a portion of a static photovoltaic system;

la figura 2 mostra una vista assonometrica dall'alto dell'impianto di figura 1. Figure 2 shows an axonometric view from above of the plant of Figure 1.

Facendo riferimento alle citate figure, con 1 à ̈ indicata schematicamente una porzione di un impianto fotovoltaico di tipo statico, cioà ̈ composto da dispositivi a pannelli fotovoltaici 2,3 in appoggio su una superficie piana di supporto 4 che costituisce il campo occupato dall'impianto. With reference to the aforementioned figures, 1 schematically indicates a portion of a static type photovoltaic system, i.e. consisting of photovoltaic panel devices 2,3 resting on a flat support surface 4 which constitutes the field occupied by the system .

I dispositivi 2,3 sono opportunamente ordinati lungo almeno due file parallele che si suppongono estendentisi perpendicolarmente al disegno ed a distanza costante fra di loro. Inoltre si suppone che ogni dispositivo 2 di una fila sia allineato nel piano del disegno con un corrispondente dispositivo 3 della fila adiacente. Ovviamente i dispositivi a pannelli 2,3 possono essere di numero qualsiasi a seconda della potenzialità assegnata all'impianto, ferma restando la loro dislocazione su file parallele per quanto riguarda la formazione dell'impianto con dispositivi secondo la presente invenzione. The devices 2,3 are suitably arranged along at least two parallel rows which are supposed to extend perpendicularly to the drawing and at a constant distance between them. Furthermore, it is assumed that each device 2 of a row is aligned in the plane of the drawing with a corresponding device 3 of the adjacent row. Obviously, the panel devices 2,3 can be of any number according to the potential assigned to the plant, without prejudice to their dislocation on parallel rows as regards the formation of the plant with devices according to the present invention.

Ogni dispositivo 2,3 comprende un'intelaiatura di sostegno 5 composta da una base 6 di pianta rettangolare, dotata di appoggi sulla superficie del campo fotovoltaico, e da due piani 7,8 che da due estremità parallele del piano 4 convergono ad inclinazione contrapposta verso l'alto formando un triangolo. Each device 2,3 comprises a support frame 5 composed of a base 6 with a rectangular plan, provided with supports on the surface of the photovoltaic field, and by two planes 7,8 which converge from two parallel ends of the plane 4 at an opposite inclination towards the top forming a triangle.

Sui piani 7,8 dell'intelaiatura sono fissati due rispettivi pannelli fotovoltaici 9,10 di tipo tradizionale, ad esempio del tipo a silicio attivo o passivo, i quali in seguito vengono definiti anteriore 10 e posteriore 9 rispetto alla posizione di provenienza dei raggi solari. Lungo l'angolo di colmo dell'intelaiatura 5 definito dai piani 7,8 à ̈ posizionato uno specchio 11 avente una superficie riflettente. La superficie riflettente dello specchio 11 di un dispositivo à ̈ orientata verso il dispositivo sistemato davanti ad esso. Vantaggiosamente lo specchio 11 à ̈ articolato in modo da poter regolare la sua angolazione rispetto ad un piano verticale. Two respective traditional photovoltaic panels 9,10 are fixed on the planes 7,8 of the frame, for example of the active or passive silicon type, which are subsequently defined front 10 and rear 9 with respect to the position of origin of the solar rays . A mirror 11 having a reflecting surface is positioned along the ridge angle of the frame 5 defined by the planes 7,8. The reflecting surface of the mirror 11 of a device is oriented towards the device arranged in front of it. Advantageously, the mirror 11 is articulated so as to be able to adjust its angle with respect to a vertical plane.

Il modo di operare del dispositivo descritto risulterà del tutto evidente da quanto sopra esposto. In particolare i raggi solari che investono lo specchio 11 del dispositivo 2, posteriore rispetto al dispositivo 3 anteriore, vengono riflessi contro il pannello posteriore 9 di quest'ultimo e quindi, anzichà ̈ sperdersi sul campo fotovoltaico, recuperati così da fornire un consistente contributo di energia solare che, altrimenti, andrebbe perduta. The method of operation of the described device will be fully evident from the above. In particular, the solar rays that strike the mirror 11 of the device 2, rearward with respect to the front device 3, are reflected against the rear panel 9 of the latter and therefore, instead of being lost on the photovoltaic field, recovered so as to provide a substantial contribution of solar energy that would otherwise be wasted.

L'invenzione descritta raggiunge pertanto gli scopi preposti. In particolare, rispetto ai dispositivi fotovoltaici tradizionali, la disposizione dello specchio 11 consente l'applicazione di un ulteriore pannello ausiliario 9 sul lato del dispositivo che, normalmente negli impianti statici tradizionali con pannelli disposti su file parallele, non viene utilizzato. Da prove effettuate à ̈ risultato che la maggiorazione di energia solare assorbita dal pannello ausiliario posteriore 9, ha permesso di ottenere maggiorazioni di rendimento del valore di varie decine in percentuale rispetto al valore nominale. The described invention therefore achieves the intended aim and objects. In particular, with respect to traditional photovoltaic devices, the arrangement of the mirror 11 allows the application of a further auxiliary panel 9 on the side of the device which, normally in traditional static systems with panels arranged in parallel rows, is not used. Tests carried out have shown that the increase in solar energy absorbed by the rear auxiliary panel 9 has made it possible to obtain increases in efficiency of several tens as a percentage of the nominal value.

Nella sua pratica attuazione il dispositivo descritto può avere numerose modifiche e varianti tutte rientranti nello stesso concetto inventivo. Secondo una prima variante à ̈ previsto che l'inclinazione dello specchio 11 venga controllata per mezzo di un attuatore elettrico o fluidodinamico che agisce sull'asse di articolazione dello specchio. Una seconda variante prevede che anche il pannello posteriore 9 del dispositivo sia articolato sulla base dell'intelaiatura e comandato angolarmente per ottimizzare l'angolo di incidenza dei raggi solari da cui viene investito. In una ulteriore variante à ̈ previsto che lo specchio 11 abbia una conformazione concava o convessa per concentrare o diffondere i raggi solari sul pannello posteriore 9. In its practical embodiment, the described device can have numerous modifications and variations, all of which are within the scope of the same inventive concept. According to a first variant, the inclination of the mirror 11 is provided to be controlled by means of an electric or fluid-dynamic actuator which acts on the articulation axis of the mirror. A second variant also provides for the rear panel 9 of the device to be articulated on the base of the frame and angularly controlled to optimize the angle of incidence of the solar rays from which it is struck. In a further variant the mirror 11 is provided to have a concave or convex conformation to concentrate or diffuse the solar rays on the rear panel 9.

Nella pratica attuazione dell'invenzione le forme ed i materiali impiegati possono variare a seconda delle esigenze. In the practical implementation of the invention, the shapes and materials used can vary according to requirements.

Claims (1)

R I V E N D I C A Z I O N I 1.) Impianto fotovoltaico a pannelli solari fotovoltaici e composto da dispositivi a pannelli fotovoltaici (2,3) disposti su una superficie piana di supporto (4) ed ordinati lungo almeno due file parallele ed a distanza costante fra di loro, caratterizzato dal fatto che ogni dispositivo (2,3) comprende un'intelaiatura di sostegno (5) composta da una base (6), dotata di appoggi su detta superficie (4), e da due piani (7,8) che da detta parallele della base (6) convergono ad inclinazione contrapposta verso l'alto formando un triangolo, sui detti piani (7,8) essendo fissati due rispettivi pannelli fotovoltaici (9,10) disposti anteriormente e posteriormente rispetto alla posizione di provenienza dei raggi solari, e lungo l'angolo di colmo dell'intelaiatura (5) definito dai detti piani (7,8) essendo posizionato uno specchio (11) avente una superficie riflettente orientata verso il dispositivo (3) sistemato davanti ad esso in modo che i raggi solari che investono lo specchio (11) del pannello posteriore (9) vengono riflessi contro il pannello posteriore del pannello anteriore (10). 2.) Impianto fotovoltaico secondo la rivendicazione 1 caratterizzato dal fatto che detto specchio (11) à ̈ articolato lungo il colmo di sommità dell'intelaiatura (5) in modo da poter regolare la sua angolazione rispetto ad un piano verticale. 3.) Impianto secondo la rivendicazione 2 caratterizzato dal fatto che l'inclinazione dello specchio (11) à ̈ controllata per mezzo di un attuatore elettrico o fluidodinamico che agisce sull'asse di articolazione dello specchio. 4.) Impianto secondo la rivendicazione che il pannello posteriore (9) del dispositivo à ̈ articolato sulla base dell'intelaiatura (5) e comandato angolarmente per ottimizzare l'angolo di incidenza dei raggi solari riflessi da detto specchio (11). 5.) Impianto secondo una delle rivendicazioni da 1 a 4 caratterizzato dal fatto che lo specchio (11) à ̈ concavo. 6.) Impianto secondo una delle rivendicazioni da 1 a 4 caratterizzato dal fatto che lo specchio (11) à ̈ convesso. 7.) Impianto fotovoltaico a pannelli solari fotovoltaici secondo quanto desumibile dalla descrizione che precede e dal disegno allegato.R I V E N D I C A Z I O N I 1.) Photovoltaic system with photovoltaic solar panels and composed of photovoltaic panel devices (2,3) arranged on a flat support surface (4) and ordered along at least two parallel rows and at a constant distance between them, characterized by the fact that each device (2,3) comprises a support frame (5) composed of a base (6), equipped with supports on said surface (4), and of two planes (7,8) which from said parallel to the base ( 6) converge at an opposite inclination towards the top forming a triangle, on said planes (7,8) being fixed two respective photovoltaic panels (9,10) arranged front and rear with respect to the position of origin of the solar rays, and along the ridge angle of the frame (5) defined by said planes (7,8) being positioned a mirror (11) having a reflecting surface oriented towards the device (3) arranged in front of it so that the solar rays that strike the mirror (11) of the panel or rear panel (9) are reflected against the rear panel of the front panel (10). 2.) Photovoltaic system according to claim 1 characterized by the fact that said mirror (11) is articulated along the top ridge of the frame (5) so as to be able to adjust its angle with respect to a vertical plane. 3.) System according to claim 2 characterized in that the inclination of the mirror (11) is controlled by means of an electric or fluid-dynamic actuator which acts on the articulation axis of the mirror. 4.) System according to the claim that the rear panel (9) of the device is articulated on the base of the frame (5) and angularly controlled to optimize the angle of incidence of the solar rays reflected by said mirror (11). 5.) Implant according to one of claims 1 to 4 characterized in that the mirror (11) is concave. 6. Plant according to one of claims 1 to 4, characterized in that the mirror (11) is convex. 7.) Photovoltaic system with photovoltaic solar panels according to what can be inferred from the above description and from the attached drawing.
ITBO2009A000647A 2009-10-07 2009-10-07 SYSTEM WITH PHOTOVOLTAIC HIGH PERFORMANCE PANELS. IT1396128B1 (en)

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ITBO2009A000647A IT1396128B1 (en) 2009-10-07 2009-10-07 SYSTEM WITH PHOTOVOLTAIC HIGH PERFORMANCE PANELS.

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ITBO2009A000647A IT1396128B1 (en) 2009-10-07 2009-10-07 SYSTEM WITH PHOTOVOLTAIC HIGH PERFORMANCE PANELS.

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ITBO20090647A1 true ITBO20090647A1 (en) 2011-04-08
IT1396128B1 IT1396128B1 (en) 2012-11-16

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8609268U1 (en) * 1986-04-05 1986-07-31 Wenzel, Joachim, Dipl.-Ing., 7000 Stuttgart Solar power plant
DE9010696U1 (en) * 1990-07-17 1990-09-27 Carl, Siegfried, 8998 Lindenberg, De
JP2004014887A (en) * 2002-06-07 2004-01-15 Kenichi Suzuki Installation stand for solar battery panel
DE202006020180U1 (en) * 2006-09-08 2007-12-27 Koller, Alexander, Dipl.-Ing. solar roof
WO2008016453A2 (en) * 2006-08-02 2008-02-07 Daniel Simon Method and apparatus for arranging a solar cell and reflector
EP2075853A2 (en) * 2007-12-28 2009-07-01 Sunerg Solar S.R.L. Photovoltaic system with high energy yield

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8609268U1 (en) * 1986-04-05 1986-07-31 Wenzel, Joachim, Dipl.-Ing., 7000 Stuttgart Solar power plant
DE9010696U1 (en) * 1990-07-17 1990-09-27 Carl, Siegfried, 8998 Lindenberg, De
JP2004014887A (en) * 2002-06-07 2004-01-15 Kenichi Suzuki Installation stand for solar battery panel
WO2008016453A2 (en) * 2006-08-02 2008-02-07 Daniel Simon Method and apparatus for arranging a solar cell and reflector
DE202006020180U1 (en) * 2006-09-08 2007-12-27 Koller, Alexander, Dipl.-Ing. solar roof
EP2075853A2 (en) * 2007-12-28 2009-07-01 Sunerg Solar S.R.L. Photovoltaic system with high energy yield

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