A concentrator configuration (10) consists of a panel (11) to which is coupled a large number of first steps arranged in parallel to each other having parabolic side walls (2, 3). The first steps (14) are optically coupled with the second steps (15) whose coupling surfaces to the first step (14) and whose coupling surfaces to the solar cells (21) are quadratic. The side walls and the front and rear walls of the second steps (15) have a parabolic curvature.