The subject of the invention is a photovoltaic lamella, its production method and a brise soleil containing at least one said photovoltaic lamella, intended for solar protection of a building and premises located therein, electricity generation and improvement of the power efficiency of a building.

Photovoltaic brise soleil systems combine the solar protection functionality with generation of electricity used not only to power the drive of the system, but also to power other equipment inside the building. Photovoltaic brise soleil systems were initially intended for office buildings and currently, thanks to their size scaling, they may also be used for houses and apartment blocks.

Brise soleil systems containing aluminium profiles dispersing sunlight reaching windows and glass facades are often used on the exteriors of office buildings as solar protection. Such shields, also known as large scale roller blinds, are an ideal carrier substrate for photovoltaic cells. Photovoltaic modules with sizes adapted to the given project are used instead of full aluminium profiles.

Such solutions are even more frequently encountered because of the current regulation dictating designing public spaces as zero-energy spaces. Projects executed by ML System using photovoltaic modules with sizes tailored individually to each of the sites, with silicon cells applied on glass and the cells being based on an aluminium frame are an example of such systems.

Large scale roller blinds are generally intended for public buildings and spaces. The large size of the lamellae and the inability of pulling them up makes such shields difficult to use in the case of family homes. A solution proposed by Yawal is close to this particular idea. Photovoltaic brise soleil systems by Yawal Sun Control are available in fixed, rotary and rotary-lifted versions. An appropriate electric drive enables automatic adjustments of moving systems and their integration with the central management system of the building.

However, the product introduced on the market this year by the Ukrainian company SolarGaps, resembles traditional roller blinds much more closely. It is advertised as the first ever roller blind keeping rooms cool, while automatically tracking the Sun and generating electricity. The smart roller blinds adjust such that they receive as much sunlight as possible. They may also be controlled manually, using an Android or an iOS application. This enables i.e. their working schedule to be created and monitoring the quantity of the generated power. Photovoltaic cells applied onto aluminium lamellae of the roller blinds are characterised by significant efficiency. Thanks to this efficiency, they may offer an alternative or a supplement to the photovoltaic panels installed on a roof. One square metre of a roller blind installed outdoors can generate 100 Watts of energy with good sunlight availability. This energy may be used to charge batteries or, once transformed into alternating current, to power household appliances (https://forumbranzowe.com/zaluzje-produkujace-prad/).

There are many known designs of photovoltaic brise soleil systems. For example, in the Chinese patent application CN 111395931 A, a solar shield and a method of its control were disclosed, wherein the device contains a device frame, an integrated anti-solar panel, a drive motor, a screwtype driving mechanism and a controller. A controller is connected to this device, which, depending on the shade, lighting, fire alarm and other situations occurring in real time, as well as on the basis of PV energy generation optimises the panel position in real time on the basis of said conditions, such as shade, daylight, ventilation, heat retention or a fire alarm, thus improving the efficiency of the device and the user comfort.

The Korean patent publication KR102078548 B1 discloses a roller blind placed within a frame in order to block the light entering inside through a window, and more precisely, a self-driven roller blind with a modular shading unit, which uses sunlight to generate electricity. The roller blind contains a set of shading vanes with multiple shading apertures spaced out evenly. The shading apertures include: an assembly panel provided with an assembly rail formed in the external wall; one or multiple solar panels inserted into the assembly rail formed on the installed assembly pane; and a conducting clamping element formed on the assembly wall of the assembly rail in order to provide contact between the output terminal of each solar panel inserted into the assembly rail for the purpose of serial connection of individual solar panels.

Other solutions are disclosed in the patent publications DE1020118004538A1, KR20180131748A, EP3633133 A1, EP3633134 A1, US2018/0195766 A1 and KR20180131751 A.

The European patent application EP3441555 A1 discloses a window roller blind of the tracking type, using solar panels. This device includes numerous solar shields, separated at a pre-determined distance and regulating sunlight transmittance; solar modules respectively attached to multiple solar shields and generating power using sunlight; a controller connected to multiple solar shields in order to adjust the tilt angle of each of the solar shields and the distance between individual shields; as well as a controller setting one of the operating modes of energy generation mode, privacy protection mode and lighting mode, as required by the user, and which controls the tilt angle of each individual solar shield and the distance between individual solar shields, according to the pre- set operating mode, the seasons and time and the angle at which Sun is present in the sky. In this device, the solar shields are divided into the first area, where the solar module is installed, and the second area, where the solar module is not connected. The first area and the second area rotate separately against the rotation axis formed between the first areas.

The international patent application WO18049478 discloses a modular photovoltaic device with roller blinds and a rectangular frame, containing multiple photovoltaic panels of the roller blind type connected in parallel within frames, electric connectors connecting each of the roller blind panels and a skeleton enabling panel rotation within the frame. Each of the panels contains: a transparent housing; multiple top photovoltaic panels facing upwards, operationally facing the top surface; multiple bottom, facing downwards, photovoltaic cells facing the bottom surface; and a reflector placed between the bottom photovoltaic cells and the transparent housing. Each of the multiple top and bottom voltaic cells occupies a surface area smaller than voltaic panels, such that light may be transmitted through the outer transparent panel to the photovoltaic panel located below, such that light captured by the device is amplified thanks to the ability of the bottom photovoltaic cells to capture reflected light.

None of the devices described above discloses a photovoltaic lamella with a structure similar to that disclosed in this invention.

Example connections between photovoltaic modules are disclosed in patent applications EP3652790 A1 and W007053306 A2, however, none of the described solutions discloses parallel connections with a design similar to that disclosed in this invention.

Despite the intensive development in this field of technology applicable to photovoltaic brise soleil systems, a large demand for development of novel devices enabling even more efficient use of sunlight, as well as other light types, for example light from inside a building, exists. Solutions, in which damage to one photovoltaic module does not force the user to replace the entire device or the damaged lamella immediately because of the sudden drop in energy generation efficiency, are also investigated.

The objective of this invention was to develop a design for a photovoltaic lamella for use in novel, photovoltaic brise soleil systems which are not characterised by the disadvantages outlined above.

This objective has been fulfilled by the disclosed invention.

Thus, the subject of this invention is a photovoltaic lamella formed as a longitudinal, closed profile or a closed panel, containing at least two photovoltaic modules on one side, wherein electric conductors from the photovoltaic module are placed inside the lamella, characterised in that it includes several layers on at least one side, placed atop one another, such that - an adhesive layer is applied onto the surface of material the lamella is made of, wherein at least one through opening passing through the adhesive layer and at least partially through the material is present in this material and in the adhesive layer, which allows the electric conductors to be routed to busbars;

- a photovoltaic layer comprised of at least two photovoltaic modules is present on the adhesive layer;

- the photovoltaic layer is covered with another adhesive layer attaching a transparent protective layer to the photovoltaic layer, wherein the adhesive layer may contain colour-imparting pigments, wherein the photovoltaic layer contains:

- at least two photovoltaic modules located next to each other and laminated,

- two adjacent busbars running between the photovoltaic layer and the adhesive layer.

The photovoltaic layer in the photovoltaic lamella preferably includes;

- at least two photovoltaic modules placed next to each other, connected mechanically and electrically using a busbar and laminated,

- two other adjacent busbars generally perpendicular to the busbars running between the photovoltaic layer and the adhesive layer, wherein positive outputs of the modules are connected electrically to the first busbar and negative outputs of the modules are connected electrically to the second busbar, while electric conductors are connected to busbars, preferably at the junctions of any of the busbars with any other busbar.

The longitudinal, closed profile is preferably hollow.

The longitudinal, closed profile preferably has a rectangular, oval cross-section or a cross-section in the form of two elongated C letters connected at their ends (a lens cross-section).

The longitudinal panel is preferably flat or convex.

The photovoltaic lamella is preferably made of materials, such as aluminium, plastic, steel, glass, ceramics or wood.

The adhesive layers preferably contain adhesive, such as melting adhesive, pressure-sensitive adhesive (PSA), a resin or a double-sided adhesive tape.

The photovoltaic layer preferably contains photovoltaic modules made using silicon, perovskite, organic OPV or CIGS (copper, indium, gallium and selenide) technology. The photovoltaic lamella according to the invention preferably contains two photovoltaic layers at both sides, which may contain photovoltaic modules made using different photovoltaic technologies.

One of the photovoltaic layers is preferably characterised by a better ability to collect sunlight, while the other photovoltaic layer is characterised by a better efficiency of dispersed light collection.

Only one opening passing through the adhesive layer and at least partially through the material, enabling electric conductors to be routed to the busbars, is preferably present in the material of the lamella and in the adhesive layer.

Preferably, at least two photovoltaic modules are placed next to each other, connected mechanically and electrically, in parallel, using a busbar and laminated.

The photovoltaic lamella according to the invention preferably has a depression in the profile, enabling photovoltaic modules to be placed therein, such that the total module thickness is generally equal to the depth of the depression.

The photovoltaic lamella according to the invention is preferably and additionally filled inside with an insulating material.

Preferably, at least two photovoltaic modules operate independently.

The photovoltaic lamella according to the invention preferably and additionally contains a reflecting element in the adhesive layer or the reflecting element is formed as a reflecting layer applied onto the surface of the material the lamella is made of.

The top adhesive layer and/or the bottom adhesive layer preferably and additionally contains a pigment.

The subject of the invention also includes a production method of the disclosed photovoltaic lamella, which includes the following stages, in which a) the photovoltaic layer is produced in the following stages, in which

- at least two photovoltaic modules are placed next to each other and subsequently laminated,

- two neighbouring busbars are placed on one side of the laminated photovoltaic modules, the busbars extend between the photovoltaic layer and the adhesive layer in the photovoltaic lamella, b) the adhesive layer is applied onto at least one side of the lamella, onto the surface of the material the photovoltaic lamella is made of, in the shape of a longitudinal, closed profile or a longitudinal panel, and subsequently at least one through opening is made through the adhesive layer and at least partially through material, which enables routing electric conductors to the busbars; c) a photovoltaic layer comprised of at least two photovoltaic modules is applied onto the adhesive layer; d) the photovoltaic layer is covered with another adhesive layer and a transparent protective layer is applied onto the photovoltaic layer, by attaching the transparent protective layer to the adhesive layer; wherein the adhesive layer may contain colour-imparting pigments; wherein stages a) and b) may be performed in any order, while stages c) and d) may be performed in any order, but only after stage a).

The method preferably includes the following stages, in which a) the photovoltaic layer is produced in the following stages, in which

- at least two photovoltaic modules are placed next to each other and connected mechanically and electrically, preferably using the same poles, using a busbar and are subsequently laminated,

- two neighbouring busbars, generally perpendicular to the busbars which extend between the photovoltaic layer and the adhesive layer in the photovoltaic lamella, are placed on one side of the connected and laminated photovoltaic modules, wherein positive outputs of the modules are connected electrically to the first busbar and negative outputs of the modules are connected electrically to the second busbar, while electric conductors are connected to busbars, preferably at the junctions of any of the busbars with any other busbar; b) the adhesive layer is applied onto at least one side of the lamella, which is in the shape of a longitudinal, closed profile or a longitudinal panel, onto the surface of the material the photovoltaic lamella is made of, and subsequently at least one through opening is made through the adhesive layer and at least partially through material, which enables routing electric conductors to the busbars; c) a photovoltaic layer comprised of at least two connected, preferably in parallel, photovoltaic modules is applied onto the adhesive layer; d) the photovoltaic layer is covered with another adhesive layer and a transparent protective layer is applied onto the photovoltaic layer, by attaching it to the adhesive layer; wherein the adhesive layer may contain colour-imparting pigments; wherein stages a) and b) may be performed in any order, while stages c) and d) may be performed in any order, but only after stage a). Preferably, only one opening passing through the adhesive layer and at least partially through the material, enabling electric conductors to be routed to the busbars, is present in the material of the lamella and in the adhesive layer during stage b).

Preferably, the adhesive layer and the photovoltaic layer are applied onto both sides of the lamella during stages b) and c), wherein the photovoltaic layers on both sides of the lamella may be different, with a photovoltaic layer on one side and a photovoltaic layer on the other side.

Two different photovoltaic layers are preferably produced in stage a), using photovoltaic modules made using various photovoltaic technologies, such as silicon, perovskite, organic OPV or CIGS (copper, indium, gallium and selenide) technology.

The subject of the invention also includes a photovoltaic brise soleil, containing:

- a frame,

- at least one photovoltaic lamella attached vertically or horizontally onto the frame,

- means moving the at least one photovoltaic lamella,

- controlling means, characterised in that the photovoltaic lamella has the shape of a longitudinal, closed profile or a closed panel, and contains at least two photovoltaic modules on one side, wherein electric conductors from the photovoltaic module are placed inside the lamella, wherein the photovoltaic lamella on at least one side includes several layers, placed atop one another, such that

- an adhesive layer is applied onto the surface of material the lamella is made of, wherein at least one through opening passing through the adhesive layer and at least partially through the material is present in the material and in the adhesive layer, which allows the electric conductors to be routed to busbars;

- a photovoltaic layer comprised of at least two photovoltaic modules is present on the adhesive layer;

- the photovoltaic layer is covered with another adhesive layer attaching a transparent protective layer to the photovoltaic layer, wherein the adhesive layer may contain colour-imparting pigments; wherein the photovoltaic layer contains:

- at least two photovoltaic modules located next to each other and laminated,

- two adjacent busbars running between the photovoltaic layer and the adhesive layer.

The photovoltaic lamella preferably contains at least two connected photovoltaic modules on one side, preferably connected in parallel, which are placed next to each other within the photovoltaic layer, connected mechanically and electrically, preferably via the same poles, using a busbar and laminated,

- two other adjacent busbars generally perpendicular to the busbars running between the photovoltaic layer and the adhesive layer, wherein positive outputs of the modules are connected electrically to the first busbar and negative outputs of the modules are connected electrically to the second busbar, while electric conductors are connected to busbars, preferably at the junctions of any of the busbars with any other busbar.

The longitudinal, closed profile is preferably hollow.

The longitudinal, closed profile preferably has a rectangular, oval cross-section or a cross-section in the form of two elongated C letters connected at their ends (a lens cross-section).

The longitudinal panel is preferably flat or convex.

The photovoltaic lamella is preferably made of materials, such as aluminium, plastic, steel, glass, ceramics or wood.

The adhesive layers preferably contain adhesive, such as melting adhesive, pressure-sensitive adhesive (PSA), a resin or a double-sided adhesive tape.

The photovoltaic layer preferably contains photovoltaic modules made using silicon, perovskite, organic OPV or CIGS (copper, indium, gallium and selenide) technology.

The photovoltaic lamella preferably contains two photovoltaic layers on both its sides, wherein the photovoltaic layers present on both sides of the lamella may contain photovoltaic modules made using different photovoltaic technologies.

One of the photovoltaic layers is preferably characterised by a better ability to collect sunlight, while the other photovoltaic layer is characterised by a better efficiency of dispersed light collection.

Only one opening passing through the adhesive layer and at least partially through the material, enabling electric conductors to be routed to the busbars, is preferably present in the material of the lamella and in the adhesive layer.

The drive means and the controlling means are preferably supplied using electricity obtained from photovoltaic modules.

The photovoltaic brise soleil according to the invention may be preferably and additionally equipped with communication interfaces, such as a GPS receiver, a GSM receiver/transmitter, Bluetooth and/or Wi-Fi, Zigbee, LoRaWAN. Preferably, at least two photovoltaic modules are placed next to each other within the lamella, connected mechanically and electrically, in parallel, using a busbar and laminated.

The lamella preferably has a depression in the profile, enabling photovoltaic modules to be placed therein, such that the total module thickness is generally equal to the depth of the depression.

The lamella is preferably and additionally filled inside with an insulating material.

Preferably, at least two photovoltaic modules operate independently inside the lamella.

The lamella additionally contains a reflecting element in the adhesive layer or the reflective element is formed as a reflecting layer applied onto the surface of the material the lamella is made of.

The top adhesive layer and/or the bottom adhesive layer of the lamella preferably and additionally contains a pigment.

This disclosure is intended to provide a system of solar panels integrated with brise soleil systems. The solar shields are made of several lamellae, which may be attached or adjusted manually or automatically in order to control sunlight intensity inside a building. The lamellae themselves may have various shapes, dimensions and may be made from a wide range of materials. Photovoltaic lamellae of a brise soleil system include several layers placed atop one another.

The first layer is the transparent front layer protecting the product against scratching, impact and chemicals. The second layer is a transparent adhesive, which may be a melted adhesive, a pressuresensitive adhesive or a resin, or a double-sided adhesive tape. The third layer is a photovoltaic cell or a module absorbing light and generating electricity. Various photovoltaic cell technologies and various colours may be used. The fourth layer is an adhesive, which may be a melted adhesive, a pressuresensitive adhesive or a resin, or a double-sided adhesive tape. This layer is provided with a small opening, which enables electric wires to be connected to photovoltaic modules, for example by soldering. The last layer is a layer of material the lamella is made of. The lamella may be made of various materials, such as aluminium, plastic, steel, glass, ceramics or wood. The lamella may have any shape appropriate for the design of the photovoltaic brise soleil system. It is usually formed as a longitudinal panel or an elongated, open profile with a cross-section resembling an elongated letter C. It may also be shaped as a longitudinal, closed, hollow profile with a square, rectangular or oval cross-section or with a cross-section in the form of two longitudinal letter C connected at their ends (a lens cross-section). The electric wires of the photovoltaic module are hidden inside the lamella core, which is provided with a small opening enabling access to the photovoltaic module. The lamella may be placed horizontally or vertically inside the photovoltaic brise soleil system and may be fixed or movable, controlled manually or automatically. In the case of automatic control, the photovoltaic brise soleil is provided with driving elements connected with a source of information used to determine the lamella position. The drive allows lamella tilt to be adjusted, adapting to the position of the Sun, for example, thus maximising the power generated by the photovoltaic modules. The sources of information may include sensors of temperature, light intensity, wind or moisture level, installed on/in the brise soleil system or on the building wall. The drive elements may also be connected to external weather data sources (weather stations), data sources providing information about the day time, season and which may be operated by the user, for example using wireless technologies and the relevant applications installed on the devices (mobile phones, tablets or computers).

The subjects of the invention are explained using embodiments of the invention presented in the drawing, in which

Fig. 1 presents an embodiment of the photovoltaic brise soleil system according to the invention, Fig. 2 presents a top view of an embodiment of a lamella according to the invention (without the photovoltaic layer);

Fig. 3 presents a cross-section through an embodiment of a lamella according to the invention (without the photovoltaic layer);

Fig. 4 presents a perspective view of an embodiment of a photovoltaic lamella according to the invention;

Fig. 5 presents the connection diagram for connection between photovoltaic modules within the photovoltaic layers installed on a photovoltaic lamella according to the invention;

Fig. 6 and 7 present the layout of layers within the photovoltaic lamella according to the invention.

Fig. 8 presents an example lamella with a depression in its profile.

Fig. 9 presents an example lamella with the insulation material present inside the lamella.

Fig. 10 presents an example layout of photovoltaic modules on the surface of the lamella.

Fig. 11 presents an example lamella, in which the adhesive layer contains a reflecting element.

Fig. 12 presents an example lamella, in which the adhesive layer contains a pigment.

Fig. 1 presents an embodiment of a photovoltaic brise soleil according to the invention, in the form of a ready device containing 8 lamellae (one lamella was removed). The device presented as an example contains empty lamellae, not yet coated with a photovoltaic layer. The photovoltaic brise soleil system contains a frame and a drive element moving the photovoltaic lamellae, such that they rotate around the longitudinal axis of the lamella, following the angle of incidence of the sunlight, as well as a controlling element. In a preferable embodiment of the invention, the drive element and the controlling element are supplied using electricity obtained from the photovoltaic modules. The controlling element may be equipped with communication interfaces, such as a GPS receiver, a GSM receiver/transmitter, Bluetooth and/or Wi-Fi. The communication interfaces enable communication between the photovoltaic brise soleil system and external sources of information, such as a weather station. Fig. 2 presents a top view of an embodiment of a lamella according to the invention, without the photovoltaic layer, and Fig. 3 presents a cross-section view, also without the photovoltaic layer.

Fig. 4 presents a part of the photovoltaic lamella coated with the photovoltaic layer according to the invention.

As shown in Fig. 1-4, photovoltaic lamellae were made of aluminium, for example, in the form of a closed aluminium profile with a lens cross-section. The closed profile is hollow, such that electric wires (10) may be hidden inside the profile.

The photovoltaic layer (3) has been attached to one side of the lamella, using double-sided adhesive tape. Adhesive tape (4) was placed on the surface of the aluminium layer (5) used to make the lamella, and a single opening (9) was made in the aluminium layer (5) and the adhesive tape (4), passing through said layers, enabling electric wires (10) to be routed to the busbars (7a, 7b). A photovoltaic layer (3) is present on the adhesive tape (4), comprised of four connected photovoltaic modules with the dimensions of 10x20 cm. The photovoltaic layer (3) is coated with another adhesive layer (2) in the form of a double-sided tape, thanks to which the transparent protective layer (1) was attached to the photovoltaic layer (3). As shown in Fig. 5, four photovoltaic modules are placed next to one another and connected mechanically and electrically via the same poles, using a busbar (6a, 6b, 6c) and subsequently laminated. The photovoltaic layer (3) on the bottom, or at the side adjacent to the adhesive tape (4), was provided with two other, closely placed busbars (7a, 7b) perpendicular to the busbars (6a, 6b, 6c). Positive module outputs (8a) in the photovoltaic layer (3) are electrically connected to the first busbar (7a), and negative module outputs (8b) are electrically connected to the second busbar (7b), while electric wires (10) are connected to the busbars (7a, 7b) at the connection point between the busbar (7b) and the busbar (6a). Photovoltaic lamellae were connected to a battery and a power inverter to supply the motor moving the lamellae.

Because of the parallel connection between the photovoltaic modules used, in the case of damage to one photovoltaic module it is not necessary to replace the entire device or the damaged lamella immediately because of the sudden drop in energy generation efficiency. Additionally, thanks to the use of the module connection method according to the invention, a uniform, flat connection between the photovoltaic layer and the lamella is achieved. Thanks to this solution, the lamella production process is also simplified, as it does not require multiple openings to be made in the lamella (lamella profile), as a single opening is enough for routing the electric wires. The photovoltaic layer additionally retains integrity thanks to the adhesive used to join the photovoltaic layer with the lamella and with the protective layer.

Power in the range between 50 and 180 W/m ² was achieved for this device, for the optimal position of the lamella towards the Sun. Other embodiments of the invention are presented in Fig. 8-12.

Thus, Fig. 8 presents an example lamella with a depression (11) in the profile, intended for placing a photovoltaic module in it. The special depression (11) in the lamella profile was designed such that it enables photovoltaic modules to be placed in the depression in such a way that the total thickness of the modules is generally equal to the depression depth. This solution ensures protection against scratching of the film surface and possible peeling of the photovoltaic module from the lamella, prevents water accumulation at the edges, at the same time providing an aesthetic effect, as the entire photovoltaic module is hidden within the depression.

Fig. 9 presents an example lamella containing insulating material inside. The hollow lamella may be used to place insulation material inside, completely filling the inside of the lamella. Brise soleil systems with a filling may act as a building insulation with the lamellae in their closed position. Insulation materials providing thermal insulation, soundproofing or electromagnetic insulation may be used in this case.

Photovoltaic modules may also be connected such that they can operate independently. Fig. 10 presents an example layout of photovoltaic modules on the surface of the lamella. Fig. 10a presents the photovoltaic modules placed along the entire lamella surface. Fig. 10b presents the photovoltaic modules placed on the top and on the bottom surface of the lamella, which operate independently. Fig. 10c, on the other hand, shows the photovoltaic modules divided along the longer and the shorter edge of the lamella.

Connections according to Fig. 10b ensure that modules remaining in the shade have no negative impact on the operation of the other modules. The top or the bottom part of the lamella may be shaded. Such shading may be caused directly by the lamella located above. It is thus preferred for modules present on the top part of the lamella to operate independently of modules located on the bottom part of the lamella.

Individual areas of the lamella along its longer edge may be additionally shaded. In this case, a connection according to Fig. 10c may be used, where several modules are present on the top or on the bottom part of the lamella, operating independently.

The division of photovoltaic modules on a single lamella increases operational efficiency of the device and ensures more flexible use, adapted to the specific working conditions of the device.

If the divided modules are located along the longer and the shorter edge of the lamella according to Fig. 10c, two sections may be distinguished.

Modules located on the top of the lamella are electrically connected together in a series or in parallel, depending on the current and voltage required. This system forms the first section. The second section is electrically connected in the same way as the first section, but includes only modules located at the bottom of the lamella. Thus, two independent sections are obtained which may be connected to the same load using a “bypass diode”. They can also be connected independently, to two independent loading channels.

In this solution, all top sections in each lamella present within the system are connected together and all bottom sections in each lamella present within the system are separately connected together. This is intended to minimise the influence of the top section shading by the adjacent lamellae on the efficiency of the entire system.

Two sections shall be present, similar to the configuration according to Fig. 10b. The exception is that individual modules on the top and on the bottom part of the lamella are not electrically connected.

The modules may be produced during a single process. It is possible to produce modules with such dimensions that the modules cover the entire surface area of the lamella, depending on the configuration (Fig. 10a, b, c). The single stage module production process makes production significantly shorter, and the subsequent installation on the lamella is also shorter.

Lamellae according to the invention may also include various additives within the adhesive layer. Fig. 11 presents an example lamella, in which the adhesive layer (4) contains a reflecting element. The adhesive layer (4) located below the photovoltaic layer (3) contains a reflecting element enabling the operational efficiency of the photovoltaic module to be improved. Light, which is not initially absorbed by the photovoltaic layer shall be reflected by the reflecting element and shall return to the photovoltaic layer, where it is absorbed and used. The reflecting element, for example in the form of a reflecting coating, may also be applied onto the layer of the material (5) the lamella is made of. In this case, the reflecting layer may be made of metals, metal oxides or other materials ensuring formation of a reflecting coating.

Fig. 12 presents an example lamella, in which the adhesive layer contains a pigment. The top adhesive layer (2) contains a pigment, which improves aesthetic properties of the given system and enables colour selection for the specific project. On the other hand, the bottom adhesive layer (4) forms a continuous substrate, on which individual modules are placed. Pigment ensuring the impression of continuity may be present in this layer, such that gaps between individual modules are not visible.