The invention relates to a device (10) for converting solar energy, comprising a solar radiation capturing unit (11) comprising at least one lens having a entry surface (11a) for the incident solar radiation and an exit surface (11b) for emitting the solar radiation in refracted form to a solar radiation concentrating unit (12) comprising a reflector surface (12a) for reflecting the solar radiation incident on the reflector surface (12a) from the exit surface of the lens (11b) to at least one target area (13) of the solar radiation concentrating unit (12). The device (10) comprises positioning means (14) for orienting the solar radiation capturing unit (11) and the solar radiation concentrating unit (12) with respect to each other through rotation about at least one axis (11′) perpendicular to a plane formed by the lens.