Solar module with a plurality of lamellar solar panels, which are mounted on an elongated support to pivot around a common axis and are movable between a first position in which they are superposed to be substantially congruent and parallel to the support, and a second position in which, opened out in a fan formation, they lie substantially adjacent to one another around the said axis, wherein the support can be extended via a closable opening out of a housing, which receives it with the solar panels in the first position.