TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Structure: The solar cell concentrator structure further comprises a notch between the first and second concentrator elements. The outside surface is characterized by a total area of more than 0.5 m2. The first concentrator element is characterized by a pitch size of about 3 to 8 mm. The separation region is characterized by a notch radius of about 0.5 to 0.3 mm. The radius of curvature is about 2.7 mm and greater. The first concentrator element integrally formed with the second concentrator element is essentially a single piece of glass material. The first concentrator element integrally formed with the second concentrator element is essentially a single piece of polymeric material. The first concentrator element integrally formed with the second concentrator element is molded glass material. The radius of curvature reduces a scattering effect of a portion of the incident electromagnetic radiation. The first concentrator element and the second concentrator element are characterized by a refractive index of about 1.4 and greater. The first concentrator element is optically coupled to a first photovoltaic region and the second concentrator element is optically coupled to a second photovoltaic region. Alternatively, the solar cell concentrator structure comprises a piece of optical material characterized by a first spatial direction and a second spatial direction, the first spatial direction being normal to the second spatial direction; a first concentrator element and a second concentrator element integrally formed on a first portion of the piece of optical material and a second portion of the piece of optical material, respectively, defined along the second spatial direction, the first concentrator element having a first curved surface, the first curved surface being characterized by a radius of curvature of at least 1 mm, the curved surface having a first flat region of at least 0.25 mm, the flat region being at least 4 mm from the inside surface; an aperture region provided on the first curved surface, the curved surface being adapted to allow electromagnetic radiation to be illuminated; an exit region provided on a second surface region of the piece of optical material, the exit region being adapted to allow electromagnetic radiation to be outputted, the second surface region being substantially flat; and a separation region provided between the first concentrator element and the second concentrator element. The piece of optical material is a glass material. The piece of optical material is provided with at least two patterns to define the first concentrator element and the second concentrator element. The radius of curvature reduces a scattering effect of a portion of the incident electromagnetic radiation. The piece of optical material is characterized by a refractive index of about 1.4 and more. The first concentrator element is optically coupled to a first photovoltaic region and the second concentrator element is optically coupled to a second photovoltaic region. The separation region has a refractive index of about 1. The separation region is characterized by a notch radius of about 0.2 mm. The first surface is a continuous and substantially flat surface. The first concentrator is characterized by a width of about 4 to 6 mm. alternatively, the solar cell concentrator structure comprises an outside surface; an inside surface, the inside surface being substantially flat; a first concentrator element integrally formed on the outside surface, the first concentrator element having a first curved surface, the first concentrator element being characterized by a web thickness, the curved surface being characterized by a pitch width, the pitch width being at least 1.33 times wider than a photovoltaic strips (901, 902) width; a second concentrator element integrally formed with the first concentrator element and the outside surface, the second concentrator element including a second curved surface and a second flat region, the second concentrator element sharing notch with the first concentrator element; a separation region provided between the first concentrator element and the second concentrator element; and a refractive index of about 1 characterizing the separation region. The solar cell concentrator structure is characterized by a thickness of less than 12 mm. The web thickness is a function of a concentration ratio. The curved surface has a first flat region. Preferred Method: Manufacturing solar cell further comprises determining a first measurement for the first concentrator element; calculating a thickness based the first measurement; and shaping the piece of glass material to the calculated thickness. It further comprises providing transparent material for coupling the first photovoltaic strips (901, 902) to the piece of glass material. It further comprises providing EVA material for coupling the first photovoltaic strips (901, 902) to the piece of glass material. It further comprises annealing the piece of glass. The piece of glass is characterized by a surface area of at least 1 m2. It further comprises electrically coupling the first and second photovoltaic strips (901, 902). It further comprises providing a plurality of supporting rollers for supporting the piece of glass. It further comprises flattening the second surface. It further comprises providing EVA material for coupling the first photovoltaic strips (901, 902) to the piece of glass material; and curing the EVA material. It further comprises defining a distance between the first concentrator element and the first photovoltaic strip, the distance being associated with a predetermined concentration ratio. The piece of glass is characterized by a thickness of at least 4 mm. The back cover comprises a back sheet coupled to the first photovoltaic strips (901, 902) using an EVA material. The back cover comprises a reflective back sheet.