High performance building envelope erected on tall buildings and tower that includes aesthetic appeal, control of light while generating free and clean energy for the building. consisting of double glazing Ug 1.0 W/m².K or triple glazing Ug 0.6 W/m².K up to 2200 x 5500 mm with embedded solar cells in matrix or random layout resulting in a power range of 60 to 170 W/m² and the aluminum profile system CW 60 Solar from Reynaers Aluminium that offers both an aesthetic and a high-tech solution and fully compatible with other aluminum profile systems from the CW range of to provide a total curtain wall solution. A specially designed profile system that facilitates the installation and maintenance of photovoltaic system components such as cabling, connectors and junction boxes at the edges. The new cover caps are designed with a minimum height to prevent shadows on the solar cells.