NOVELTY - The element (2) has housing (7) comprising a frame, a light transmitting front panel (9) and a rear face (10) that are arranged at distance from each other defined by side faces (11). A solar energy collecting system (4) is positioned in the housing and provided with a solar energy collector (17), a solar energy concentrator (12) and a sun tracking mechanism (13) arranged to move the solar energy concentrator with respect to a frame about a tracking axis (14). The concentrator concentrates incident solar energy radiation for collection by the solar energy collector.    USE - Facade module element such as window or concrete or brick panel elements, for forming a non-structural building element i.e. self-supporting building element, to form a part of a building envelope such as facade of structure e.g. building and noise-protection wall (all claimed), of building. Can also be used forming dam or roof.    ADVANTAGE - The solar energy collector can extend over the whole width of the frame, thus optimizing an area in which the solar energy can be collected and increasing the efficiency of the solar energy collecting system while reducing utilization rate of electricity or energy generated by fossil fuels and emission rate of carbon dioxide. The front panel is positioned in a front part of the solar energy collecting system to protect the solar energy collecting system from environment influences such as wind, rain and contamination as well as to protect the building to realize climate-regulating function. The front panel is removable to open the facade module element, so that the housing, the solar energy collecting system and the sun tracking mechanism can be cleaned even after assembly of a structure.    DETAILED DESCRIPTION - The solar energy collector is a solar thermal energy collector. The solar energy concentrator is provided with a lens that is an elongated Fresnel lens. The light transmitting front panel comprises optically transparent material that is selected from one of glass, polymethyl methacrylate (PMMA) or polycarbonate (PC). The rear face comprises a panel of partially optically transparent material i.e. sand-blasted material, and a panel of opaque material such as concrete or wood. An INDEPENDENT CLAIM is also included for a facade.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a facade comprising multiple facade module elements.    Facade module element (2)    Solar energy collecting system (4)    Housing (7)    Light transmitting front panel (9)    Rear face (10)    Side faces (11)    Solar energy concentrator (12)    Sun tracking mechanism (13)    Tracking axis (14)    Solar energy collector (17)