CH719895A1 - Facade element with photovoltaic module. - Google Patents

Abstract

A facade element (1) for a substructure (2) comprises a base body (3), at least one comb (4), at least one groove (5), at least one photovoltaic module (6), and at least one fastening element. The base body (3) has a top side (8), a bottom side (9), a front side and a back side with a cavity (12) in which the fastening element is arranged. The front has a receiving surface on which the photovoltaic module (6) is arranged. The comb (4) is arranged on the top (8) or on the bottom (9) and the groove (5) is arranged either on the bottom (9) or on the top (8) corresponding to the comb (4). The comb (4) is designed to protrude into the groove (5) of another facade element (1). The groove (5) is completely delimited by a front side wall facing the base body (3) and at least partially by a rear side wall facing away from the base body (3).

Description

TECHNICAL FIELD

The present invention relates to a facade element for a substructure according to claim 1, a facade system comprising such facade elements according to claim 13, and a method for producing such a facade system on a substructure according to claim 15.

STATE OF THE ART

Photovoltaic modules, also called PV modules or solar modules, include solar cells that can convert light into electrical power. The electrical energy obtained can be dissipated and further used via electrical contact. To use solar energy, photovoltaic modules are increasingly being installed on facade elements, which are attached to buildings as a facade system, for example. When using facade elements comprising photovoltaic modules, precise and long-term stable assembly of these facade elements is desirable in order to avoid damage to the modules or a deterioration in efficiency. Known facade elements generally require a lot of assembly effort. Building observers often recognize them as photovoltaic modules at first glance.

PRESENTATION OF THE INVENTION

It is an object of the present invention to provide a facade element for a substructure which has a simple structure and allows easy assembly, while also having an improved appearance.

[0004] This object is achieved by a facade element according to claim 1. A facade element is therefore specified for a substructure, wherein the facade element has a base body, at least one comb, at least one groove, at least one photovoltaic module, and at least one fastening element for fastening the facade element on the substructure. The base body has a top side, a bottom side opposite the top side, a front side, and a back side opposite the front side. The back has a cavity in which the fastening element is arranged. The front has a receiving surface on which the photovoltaic module is arranged. The comb is at the top or at the bottom and the groove is arranged at either the bottom or the top corresponding to the comb. For example, if the comb is arranged on the top, the groove is arranged on the bottom, and vice versa. The comb and the groove each extend along a transverse direction of the facade element. The comb is designed to protrude into the groove of a further facade element, which can be arranged adjacent to the facade element with respect to a longitudinal direction of the facade element that runs perpendicular to the transverse direction. The groove is completely delimited by a front side wall facing the base body and at least partially by a rear side wall facing away from the base body.

Viewed in the installed position of the facade element, the transverse direction of the facade element can be understood as the horizontal direction. Analogously, the longitudinal direction of the facade element can be understood as a vertical direction when viewed in the installed position of the facade element. The installation position of the facade element is understood to be the facade element attached to the substructure.

Viewed in the installed position of the facade element, the back of the base body faces the substructure and the front of the base body faces away from the substructure. In particular, the front of the base body and thus the photovoltaic module attached to it face outwards.

The front side wall of the groove runs completely along the groove and thus, viewed in the transverse direction, along an entire length of the groove. It is further preferred that the front side wall of the groove is continuous and has no interruptions or the like.

The rear side wall of the groove runs at least partially and thus at least along a partial length of the groove when viewed in the transverse direction. The rear side wall can be interrupted when viewed in the transverse direction and have one or more interruptions. In other words, the rear sidewall may form one or more sidewall sections. However, it is also conceivable that the rear side wall runs completely along the groove and thus along the entire length of the groove when viewed in the transverse direction.

The comb preferably extends at least partially and preferably completely along the top or bottom of the base body. Furthermore, the comb can be continuous when viewed in the transverse direction or have one or more cutouts. The cutouts preferably extend at least partially inwards from a free end of the comb into the comb. The comb preferably has at least two cutouts, one cutout providing access to the fastening element, in particular a level adjustment screw of the fastening element, and the other cutout providing a breakthrough for an electrical connecting line along the longitudinal direction or vertical direction between the photovoltaic modules .

The base body is preferably plate-shaped and/or a flat element that extends in a plane. Consequently, the back and the front preferably run parallel to one another and/or parallel to the plane of the base body. The base body can have different configurations and can be, for example, rectangular or square. The base body preferably has a length of approximately 500 millimeters along the longitudinal direction and a length of approximately 3000 millimeters along the transverse direction. However, it is important to understand that other lengths are just as conceivable.

The top side of the base body preferably ends in an upper base body edge and the underside of the base body preferably ends in a lower base body edge. Furthermore, the base body preferably has mutually opposite lateral sides, which preferably also each end in a lateral base body edge.

The comb is particularly preferably formed on the upper base body edge or lower base body edge and the groove is particularly preferably formed corresponding to the comb on the lower base body edge or on the upper base body edge. The receiving surface of the base body preferably extends essentially to the upper edge of the base body, the lower edge of the base body and the two lateral edges of the base body.

It is further preferred that the photovoltaic module is plate-shaped and/or is a flat element that extends in a plane. The photovoltaic module and the base body particularly preferably run in parallel planes. It is further preferred that the photovoltaic module is flexible and/or glass-free.

Preferably, the comb extends away from the base body at an angle towards the rear. Seen in the installed position, the comb runs at an angle from the base body towards the substructure. It is further preferred that the comb slopes diagonally upwards and backwards towards the substructure (in the case of a comb on the top of the facade element) or diagonally downwards and backwards towards the substructure (in the case of a comb on the underside of the basic body). A distance between the comb and a plane running through the base body thus increases increasingly towards the free end of the comb.

The groove is preferably arranged on the back of the base body. It is further preferred that the front side wall of the groove runs parallel to the base body. Particularly preferably, the front side wall of the groove runs parallel to the back of the base body and particularly preferably lies flat on the back of the base body.

It is further preferred that the rear side wall of the groove extends at an angle to the base body. In addition, it is preferred that the rear side wall of the groove has a free end and, viewed in the direction of the free end, the rear side wall extends increasingly towards the base body and in particular towards the rear. A distance between a plane running through the base body and the rear side wall thus preferably decreases increasingly in the direction of the free end.

Viewed in the installed position, the rear side wall therefore preferably extends at an angular angle from the substructure in the direction of the base body. It is further preferred that the rear side wall is slanted upwards and forwards towards the base body (in the case of a groove on the top of the facade element) or diagonally downwards and forwards towards the base body (in the case of a groove on the underside of the base body).

The groove preferably has a bottom wall between the front side wall and the rear side wall.

The bottom wall preferably runs at an angle with respect to the front side wall and/or the rear side wall and/or the base body.

Viewed in the installed position, the bottom wall preferably runs obliquely downwards and inclined backwards (in the case of a groove on the underside of the base body) or inclined obliquely upwards and backwards (in the case of a groove on the top of the base body).

A cross section of the groove preferably becomes larger towards the bottom wall.

The angles of inclination along which the ridge and/or the rear side wall and/or the bottom wall are inclined are preferably different. For example, an angle of inclination between the comb 4 and a (fictitious) plane through the base body is between 40° and 50°, in particular 45°. An angle of inclination between the front side wall of the groove and the (fictitious) plane through the base body is preferably between 0° and 5°, preferably 0°. An angle of inclination between the rear side wall of the groove and a (fictitious) reference plane running parallel to the (fictitious) plane of the base body is preferably between 25° and 35°, preferably 30°. An angle of inclination between the bottom wall and the (fictitious) plane through the base body is preferably between 65° and 75°, preferably 70°. However, other angles of inclination are just as conceivable.

The groove and/or the comb are preferably formed in one piece with the base body. This means that the base body and the groove and/or the comb preferably form a one-piece element.

[0024] Particularly preferred are the groove and/or the ridge deformations of the base body. For example, the groove and/or the comb can be produced from the base body by a punching and/or forming process.

The base body and/or the comb and/or the groove preferably comprise or consist of at least one metal compound.

The metal compound can be an elemental metal or a metal alloy.

[0027] Particularly preferably, the base body is a sheet metal part which is produced by a punching and/or forming process. The groove and/or the comb are therefore preferably also punched or formed bleached parts. A preferred thickness of the base body or a preferred sheet metal thickness of the sheet metal part is in a range from 1 millimeter to 3 millimeters, particularly preferably in a range from 1.5 millimeters to 2.5 millimeters. It is further preferred that the base body has at least one coating. The coating preferably comprises or consists of a highly weatherproof powder coating, as is generally known from the prior art for facade construction. However, other coatings are just as conceivable.

The cavity is preferably delimited by the comb and the groove, in particular by their bottom wall.

The cavity is particularly preferably formed by the back of the base body as well as the angled bottom wall and the angled comb.

The facade element preferably offers a recess or a breakthrough for at least one connection box for the photovoltaic module. This means that at least one connection box for the photovoltaic module is preferably attached to the facade element.

[0031] Preferably, the connection box is at least partially arranged in the cavity. Seen in the installed position, the connection box is preferably arranged at a distance from the substructure. For example, it is preferred that the connection box, viewed in the installed position, is arranged between parallel planes, one of which runs through the front of the base body and the other through an outside of the substructure facing the facade element. A junction box spaced from the substructure is preferred in order to provide sufficient cooling.

Additionally or alternatively, the connection box preferably extends through the back of the base body. Or to put it another way, the connection box is preferably arranged at least partially in the recess or opening in the base body, in particular in a recess or opening in the rear side.

Preferably, the junction box comprises at least two electrical connecting lines such as cables, via which electrical energy can be conducted away from the photovoltaic module. As mentioned at the beginning, the connecting line can be routed via cutouts in the facade element such as the cutouts in the comb.

The photovoltaic module is connected to the receiving surface in a materially bonded manner, in particular with an adhesive.

The photovoltaic module preferably extends essentially over the entire receiving area. In particular, the photovoltaic module essentially extends to the upper base body edge, the lower base body edge and the two lateral base body edges of the base body. However, it is important to understand that the photovoltaic module can only extend over a partial area of the receiving surface. In this case, it is also conceivable that a horizontal stripe layout is created over a coloring of the facade element if the base body is higher than the height of the photovoltaic module in the longitudinal direction.

The fastening element is preferably a profile extending along the transverse direction, which can be connected to the substructure.

The substructure is preferably a profile such as a metal profile, a wooden batten, etc., which is preferably attached to a building wall. Particularly preferably, the fastening element in the form of the profile is designed to be hung into the substructure. It should be noted at this point that the substructure can include a primary and a secondary substructure. The primary substructure is preferably built directly on a facade or the like, preferably including consoles that protrude beyond external insulation. In this case, the secondary substructure preferably includes said substructure such as the metal profile, the wooden battens, etc. Particularly preferred is this said substructure, i.e. the secondary substructure, a support profile running along the transverse direction or horizontal direction, which is connected to the fastening element of the facade element, for example integrated handles, is compatible.

The fastening element can comprise one or more fastening sections. For example, the fastening element can comprise at least a first fastening section and a second fastening section, which fastening sections can be connected to the substructure. For example, the first fastening section can be fastened to a first profile structure of the substructure and the second fastening section can be fastened to a second profile structure of the substructure. By providing several fastening sections, an improved fastening of the facade element to the substructure is achieved.

The fastening element can be adjustable with respect to the base body. However, it is also conceivable that the fastening element is permanently attached to the base body. It is also conceivable that two or more fastening elements are provided.

[0040] In addition, it is preferred that the fastening element is arranged in an upper third of the facade element, viewed with respect to the longitudinal direction.

This means that the fastening element is preferably attached closer to the top of the base body and further away from the underside of the base body. This reduces or even prevents wobbling or wobbling of the façade element. This arrangement therefore has the advantage that the facade element can be attached more stably to the substructure.

In a further aspect, a facade system comprising at least two facade elements is specified as described above, with the comb of one facade element protruding into the groove of the other facade element.

All statements regarding a facade element per se preferably apply equally to the facade system comprising the facade elements and vice versa.

The at least two facade elements of the facade system are preferably arranged along the longitudinal direction. This means that, when viewed in the installed position, one facade element is arranged above or below the other facade element. In other words, the facade elements are preferably arranged along the vertical direction. The underside of the base body, in particular the lower base body edge, of one facade element is arranged adjacent to the top of the base body, in particular to the upper base body edge, of the other facade element.

The comb and the groove, in particular the rear side wall of the groove, are preferably in surface contact with one another at least in areas. Preferably, however, no positive connection is formed between the facade elements. Particularly preferably, the comb of one facade element presses against the rear side wall of the groove of the other facade element in such a way that this other facade element cannot be moved away from the substructure.

[0046] Furthermore, the comb and the groove of the facade elements are arranged and designed, in particular inclined, in such a way that liquids such as rainwater are drained from the upper facade element to the outside via the comb of the lower facade element. When viewed in the installed position, the base bodies of the facade elements are preferably arranged at a distance from one another with respect to the longitudinal direction or vertical direction. It is further preferred that the base bodies of the facade elements are arranged within one plane when viewed in the installed position.

It is important to understand that the facade system includes not just two, but a large number of facade elements. It is further preferred that the facade elements just described, arranged vertically or one above the other, form a row of facade elements, and two or more such rows are arranged next to one another when viewed in the installed position. Or to put it another way, the rows of facade elements are preferably arranged next to one another when viewed in the transverse direction or in the horizontal direction. It is preferred that the lateral sides of the base bodies, in particular their lateral base body edges, are arranged adjacent to one another and in particular in contact with one another.

In a further aspect, a method for producing a facade system as described above on a substructure is specified. At least two facade elements are attached to the substructure, and the comb of one facade element protrudes into the groove of the other facade element.

[0049] Here too, it should be understood that all statements regarding the facade element per se or the facade system preferably apply equally to the method for producing the facade system and vice versa.

BRIEF DESCRIPTION OF THE DRAWINGS

Preferred embodiments of the invention are described below with reference to the drawings, which serve only for explanation and are not to be construed as restrictive. The drawings show: Fig. 1 shows a partial perspective view of a facade system comprising facade elements which are arranged on a substructure; Fig. 2 shows a rear view of the facade system according to Figure 1; Fig. 3 shows a perspective partial view of the substructure and a facade element according to Figure 1; Fig. 4 shows a sectional view through the substructure and the facade element according to Figure 3; Fig. 5 shows an exploded rear view of the facade system according to Figure 1; 6 shows a front view of a facade system comprising facade elements which are arranged on a substructure; Fig. 7 shows a sectional view through the facade system and the substructure according to Figure 6; 8a shows a partial perspective view of the substructure and a facade element according to FIG. 6; Fig. 8b shows a sectional view through the substructure and the facade element according to Fig. 8a; 9a shows a further partial perspective view of the substructure and a facade element according to FIG. 6; Fig. 9b shows a sectional view through the substructure and the facade element according to Fig. 9a; 10a shows a further partial perspective view of the substructure and a facade element according to FIG. 6; Fig. 10b shows a sectional view through the substructure and the facade element according to Fig. 10a; Fig. 11 shows an enlarged view of the sectional view according to Figure 10b.

DESCRIPTION OF PREFERRED EMBODIMENTS

Aspects of the facade element 1 according to the invention and of a facade system 100 formed from the facade elements 1 are explained in more detail in the figures.

1 to 2 and 5, for example, the facade elements 1 each comprise a base body 3 with an upper side 8 comprising an upper base body edge 21, an underside 9 opposite the upper side 8 comprising a lower base body edge 22, and a front side 10 , and a rear side 11 opposite the front side 10. The base body 3 also has opposite lateral sides 19, 20, each of which ends in a lateral base body edge 23, 24. The base body 3 is a flat element in the form of a square plate. However, other configurations are just as conceivable, see for example Figure 6, which shows a facade system 100 comprising rectangular facade elements 1.

[0053] Furthermore, the facade elements 1 each comprise a comb 4 and a groove 5. The comb 4 is designed to fit into the groove 5 of a further facade element 1, which is adjacent to the facade element 1 with respect to a longitudinal direction L of the facade element 1 that runs perpendicular to the transverse direction Q is arranged to enter. In the facade elements 1 shown here, the comb 4 is arranged on the top side 8, more precisely on the upper edge of the base body, and the groove 5 is arranged on the underside 9, more precisely on the lower edge of the base body. It is important to understand that this arrangement could also be reversed. Both the comb 4 and the groove 5 each extend along the transverse direction Q of the facade element 1. In the installation position of the facade element 1 shown in Figure 1, the transverse direction Q of the facade element 1 can be understood as the horizontal direction H. Analogously, the longitudinal direction L of the facade element 1 can be understood as the vertical direction V in the installed position of the facade element 1. In the installation position shown here, the facade elements 1 are attached to a substructure 2. The substructure 2 is horizontal profiles which are attached to a building wall 25.

1, in the installed position of the facade element 1, the back 11 of the base body 3 faces the substructure 2 and the front 10 of the base body 3 faces away from the substructure 2 and faces outwards. Furthermore, the facade elements 1 each include at least one photovoltaic module 6, which are attached to a receiving surface 13 of the front 10 and thus also face outwards. The photovoltaic modules 6 are bonded to the receiving surfaces 13 using an adhesive. As can be seen in particular from Figures 1 to 6, the photovoltaic modules 6 extend essentially over the entire receiving surface 13, essentially up to the upper base body edge 21, the lower base body edge 22 and the two lateral base body edges 23, 24 of the base body 3. The photovoltaic modules 6 are plate-shaped and have a shape analogous to the shape of the base body 3, for example square as in Figures 1 and 2 or rectangular as in Figure 6.

[0055] In addition, the back 11 of the base body 3 each has a cavity 12, in which at least one fastening element 7 for fastening the facade element 1 to the substructure 2 is arranged. The cavity 12 is limited by the comb 4 and the groove 5. As can be seen from Figures 2 to 4, the fastening element 7 is a profile extending along the transverse direction Q or horizontal direction H, which can be connected to the substructure 2. The substructure 2 here is also a profile which extends along the horizontal direction H. To connect the facade element 1 to the substructure 2, the fastening element 7 in the form of the profile is suspended into the substructure 2 in the form of the profile, see Figure 4. As can be seen further from Figure 4, the fastening element 7 comprises a plurality of fastening sections 7a; 7b, here a first upper fastening section 7a and a second lower fastening section 7b. The substructure 2 also includes two fastening sections, so that the upper fastening section 7a of the fastening element 7 can be connected to the upper fastening section of the substructure 2 and the lower fastening section 7b of the fastening element 7 can be connected to the lower fastening section of the substructure 2. As can be seen, for example, in Figure 2, the fastening element 7 of the facade element 1 is arranged in an upper third of the facade element 1 when viewed with respect to the longitudinal direction L of the facade element 1.

2 and 5, the facade elements 1 each comprise at least one connection box 18 for the photovoltaic module 6, the connection box 18 being at least partially arranged in the cavity 12 of the base body 3 and extending through the back 11 of the base body 3 extends through. In particular, the connection box 18 is at least partially arranged in a recess 26 in the base body 3, in particular in a recess 26 in the back 11, see Figure 2. In the installation position shown in Figure 7 it can also be seen that the connection box 18 is spaced from the substructure 2 and from the building wall 25 is arranged. In particular, the connection box 18 comes to lie between (fictitious) parallel planes, one of which runs through the front 10 of the base body 3 and the other through an outside 27 of the building wall 25 facing the facade element 1.

[0057] From Figures 1 and 2 it can also be seen that the comb 4 extends completely along the top side 8 of the base body 3 and, viewed with respect to the transverse direction Q, has cutouts 28. The cutouts 28 extend from a free end 29 of the comb 4 partially inwards into the comb 4. The groove 5 is arranged on the back 11 of the base body 3 and is entirely delimited by a front side wall 14 facing the base body 3 and partially by a rear side wall 15 facing away from the base body 3. The front side wall 14 of the groove 5 runs completely along the groove 5 and thus along an entire length of the groove 5 when viewed with respect to the transverse direction Q. The front side wall 14 of the groove 5 is formed continuously here and has no interruptions or the like. The rear side wall 15 of the groove 5 runs along a partial length of the groove 5 with respect to the transverse direction Q and is interrupted. In particular, the rear side wall 15 has an interruption 30 here.

As can be seen from Figures 7 to 8b, the comb 4 extends in the direction of the back 11 at an angular inclination away from the base body 3. Seen in the installed position, the comb 4 runs at an angle from the base body 3 in the direction of the substructure 2, here diagonally upwards and backwards in the direction of the substructure 2. A distance between the comb 4 and a (fictitious) running through the base body 3 The plane thus increases increasingly towards the free end 29 of the comb 4.

7 and 9a to 9b, the front side wall 14 of the groove 5 runs parallel to the base body 3, here parallel to the back 11 of the base body 3, and also lies flat on the back 11 of the base body 3.

The rear side wall 15 of the groove 5 runs at an angle to the base body 3. Seen in the installed position, the rear side wall 15 runs obliquely downwards and forwards in the direction of the base body 3. A distance between a (fictitious) running through the base body 3 The plane and the rear side wall 15 become increasingly smaller in the direction of a free end 17 of the rear side wall 15 of the groove 5.

The groove 5 has a bottom wall 16 between the front side wall 14 and the rear side wall 15. The bottom wall 16 runs at an angle with respect to the front side wall 14 and the rear side wall 15 and the base body 3. Seen in the installed position, the bottom wall 16 runs obliquely downwards starting from the front 10 of the base body 3 in the direction of the substructure 2 and inclined backwards towards the substructure 2.

9b, due to the respective inclinations of the side and bottom walls 16 of the groove 5, a cross section of the groove 5 towards the bottom wall 16 becomes larger. The angles of inclination along which the comb 4 and/or the rear side wall 15 and/or the bottom wall 16 are inclined are different, see Figures 10a, 10b and 11. In the example shown and as shown enlarged in Figure 11, there is an angle of inclination α between the comb 4 and a (fictitious) plane e1 through the base body 45°. An angle of inclination β between the front side wall 14 of the groove 5 and the (fictitious) plane e1 through the base body 3 is 0°. An angle of inclination γ between the rear side wall 15 of the groove 5 and a (fictitious) reference plane e2 running parallel to the (fictitious) plane e1 of the base body 3 is 30°. An angle of inclination δ between the bottom wall 16 and the (fictitious) plane through the base body 3 is 70°.

10a and 10b, the groove 5 and the comb 4 are formed in one piece with the base body 3 and are formed by deformations of the base body 3.

[0064] As can also be seen from these figures, when producing the facade system 100, the facade elements 1 are arranged along the longitudinal direction L or vertical direction in such a way that the comb 4 of the lower facade element here protrudes into the groove 5 of the upper facade element 1 here. Furthermore, the comb 4 and the groove 5 are in surface contact at least in some areas. In particular, the comb 4 in the area of its free end and the rear side wall 15 of the groove 5 in the area of its free end 17 are in surface contact with one another. Furthermore, the comb 4 presses against the rear side wall 15 of the groove 5 in such a way that the facade element 1 comprising this groove 5 cannot be moved away from the substructure 2.

As can be seen from these figures, the arrangement and design of the comb 4 and the groove 5 is such that liquids such as rainwater are drained from the upper facade element 1 to the outside via the comb 4 of the lower facade element 1. This means that a liquid striking the base body 3 of the upper facade element 1 flows downward along the base body 3 and then reaches the comb 4 of the lower facade element 1. Since this is inclined downwards and outwards, the liquid then flows along the inclined Comb 4 down and outwards.

REFERENCE SYMBOL LIST

[0066] 1 facade element 2 substructure 3 base body 4 comb 5 groove 6 photovoltaic module 7 fastening element 7a fastening section 7b fastening section 8 top 9 bottom 10 front 11 back 12 cavity 13 receiving surface 14 front side wall 15 rear side wall 16 bottom wall 17 free end 18 connection box 19 lateral side 20 lateral side 21 upper base body edge 22 lower base body edge 23 lateral base body edge 24 lateral base body edge 25 housing wall 26 recess 27 outside 28 cutout 29 free end 30 interruption 100 facade system Q transverse direction L longitudinal direction V vertical direction H horizontal direction α angle of inclination β angle of inclination γ angle of inclination δ angle of inclination e1 plane e2 plane

Claims (15)

1. Facade element (1) for a substructure (2) comprising: - a base body (3); - at least one comb (4); - at least one groove (5); - at least one photovoltaic module (6); and - At least one fastening element (7) for fastening the facade element (1) to the substructure (2); wherein the base body (3) has a top side (8), a bottom side (9) opposite the top side (8), a front side (10), and a back side (11) opposite the front side (10), wherein the back (11) has a cavity (12) in which the fastening element (7) is arranged, wherein the front side (10) has a receiving surface (13) on which the photovoltaic module (6) is arranged, wherein the comb (4) is arranged on the top (8) or on the bottom (9) and the groove (5) corresponding to the comb (4) is arranged either on the bottom (9) or on the top (8), wherein the comb (4) and the groove (5) each extend along a transverse direction (Q) of the facade element (1), wherein the comb (4) is designed to fit into the groove (5) of a further facade element (1), which can be arranged adjacent to the facade element (1) with respect to a longitudinal direction (L) of the facade element (1) which runs perpendicular to the transverse direction (Q). , to register, and wherein the groove (5) is entirely delimited by a front side wall (14) facing the base body (3) and at least partially by a rear side wall (15) facing away from the base body (3). 2. Facade element (1) according to claim 1, wherein the comb (4) extends away from the base body (3) at an angle towards the back (11), and / or wherein the groove (5) is arranged on the back (11) of the base body (3). 3. Facade element (1) according to one of the preceding claims, wherein: - The front side wall (14) of the groove (5) runs parallel to the base body (3), and / or - The rear side wall (15) of the groove (5) runs at an angle to the base body (3), and / or - The rear side wall (15) of the groove (5) has a free end (17) and the rear side wall (15), viewed in the direction of the free end (17), increasingly runs towards the base body (3) and in particular towards the back (11). . 4. Facade element (1) according to one of the preceding claims, wherein the groove (5) between the front side wall (14) and the rear side wall (15) has a bottom wall (16), and wherein the bottom wall (16) runs at an angle with respect to the front side wall (14) and/or the rear side wall (15) and/or the base body (3). 5. Facade element (1) according to one of the preceding claims, wherein the groove (5) and / or the comb (4) are formed in one piece with the base body (3), and / or wherein the groove (5) and/or the comb (4) are deformations of the base body (3). 6. Facade element (1) according to one of the preceding claims, wherein the base body (3) and / or the comb (4) and / or the groove (5) comprise or consist of at least one metal connection. 7. Facade element (1) according to one of the preceding claims, wherein the cavity (12) is delimited by the comb (4) and the groove (5), in particular by its bottom wall (16). 8. Facade element (1) according to one of the preceding claims, further comprising at least one connection box (18) for the photovoltaic module (6), and wherein the connection box (18) is at least partially arranged in the cavity (12), and/or wherein the connection box (18) extends through the back (11) of the base body (3). 9. Facade element (1) according to one of the preceding claims, wherein the photovoltaic module (6) is connected to the receiving surface (13) in a materially bonded manner, in particular with an adhesive. 10. Facade element (1) according to one of the preceding claims, wherein the photovoltaic module (6) extends essentially over the entire receiving surface (13). 11. Facade element (1) according to one of the preceding claims, wherein the fastening element (7) is a profile extending along the transverse direction (Q), which can be connected to the substructure (2), and / or wherein the fastening element (7) comprises at least a first fastening section (7a) and a second fastening section (7b), which fastening sections (7a; 7b) can be connected to the substructure (2). 12. Facade element (1) according to one of the preceding claims, wherein the fastening element (7) is adjustable with respect to the base body (3), and / or wherein the fastening element (7) is arranged in an upper third of the facade element (1) as viewed in the longitudinal direction (L). 13. Facade system (100) comprising at least two facade elements (1) according to one of the preceding claims, wherein the comb (4) of one facade element (1) protrudes into the groove (5) of the other facade element (1). 14. Facade system (100) according to claim 13, wherein the comb (4) and the groove (5), in particular the rear side wall (15), are in surface contact at least in areas, and / or wherein the comb (4) of one facade element (1) presses against the rear side wall (15) of the groove (5) of the other facade element (1), such that this other facade element (1) cannot be moved away from the substructure (2). . 15. A method for producing a facade system (100) according to one of claims 13 and 14 on a substructure (2), wherein at least two facade elements (1) are attached to the substructure (2), and wherein the comb (4) of one facade element (1) protrudes into the groove (5) of the other facade element (1).