A slim solar module (1) is proposed. It comprises a solar laminate (3) comprising plural solar cells (9) interposed between front and rear cover sheets (13, 15), a frame (5) enclosing the solar laminate (3) and at least one reinforcement strut (7) arranged at a rear surface of the solar laminate (3). A ratio between a frame surface and a frame thickness shall be between 45000 and 70000. For example, the frame may have a thickness of less than 35 mm. Specifically, the frame may have a length of 1665 mm, a width of 991 mm and a thickness of 30 mm. Due to the reduced thickness, the solar module has a reduced volume being beneficial during transport to a destination location. However, the thickness has been optimized to, with the reinforcement struts, still providing for sufficient mechanical stability for the solar module.