A portable storage silo comprising a tank has a peripheral wall, a top wall and a bottom wall. There is provided a filling opening at or adjacent a top of the tank and a discharge opening at or adjacent a bottom of the tank. A support assembly for holding the tank with the bottom wall raised from the ground such that the discharge opening is raised for discharge into a receptacle at the ground. The support assembly includes a base for resting on the ground. The base including a plurality of arms connected to the base and located at spaced positions around the base. The discharge opening has an electrically actuated gate arrangement. The filling opening has an electrically actuated lid. The actuators at the discharge opening and the filling opening are solar powered.