Abstract: A device for driving a closure component (9) in a building from a solar energy source (1), comprising at least one low-voltage alternating current electric motor (3) mechanically coupled to the closure component, a direct current electrical energy accumulator element (2), a solar energy source delivering a direct voltage. The electrical energy accumulator element has a nominal voltage lower than said effective electric voltage and greater than the direct voltage delivered by the solar energy source. A DC-DC charger (4) converts the output electrical energy from the solar energy source into electrical energy with an electric voltage for charging the electrical energy accumulator element. A DC-AC converter (5) converts the electrical energy with a direct output voltage of the electrical energy accumulator element into electrical energy with an alternating voltage that is able to power said electric motor.