This invention describes a new form and structure of silo for storage, that allows a softer handling of the same, reducing this way losses for damaged grain and allowing humidity and temperatura control at a low cost; consisting of a solar hexagonal silo of type consisting of an hexagonal prism in a horizontal position that has vertical hexagonal bases and six lateral faces, supported by its vertical lateral faces perpendicular to the bases, containing in its interior two plates at an angle, characterized in that it comprises 1) in its superior walls, in the exterior face, a series of solar collectors in wich entrances and exits of air, in the inner part of the collectors, includes dehumidifiers and wich exits are connected to a hearer that collects hot air and drives it to a ventilator that injects the air into the ventilation tubes int he heart of the grain; 2) at the entrance and exit of the collectors, in the vertical lateral walls in its external face, directly, under the level of the unión with the interior face of the silo of plates that divide it into two, and in the loading grain feeder, a series of vents that control the flow, direction and origin of the air.