A roofing structure comprising a plurality of adjacent panels (10, 11, 12) made of sheet metal, namely comprising: - first panels (10b, 10c) made of sheet metal each exhibiting a central portion shaped in such a way as to form on the panel at least one channel-shaped ribbing arranged in use in the direction of the pitch of the roof to be covered, a first plurality of said first panels having the ribbing of a pre-determined first height; and - at least an energy module which is supported by the ribbing of said pre-determined first height, on the side opposite to the pitch; - the energy module comprising at least one second panel made of sheet metal and at least one pipe made of the same metal material as the panels (10,11), with a flattened cross-section, arranged in the direction of the pitch of the roof and with its respective opposite flat faces (22, 23) sandwiched between a respective outer and upper flat surface of the ribbing and a respective inner and lower flat surface of the second panel; characterized in that, in combination: - said central portion of said first panels (10b, 10c) shaped in such a way as to form on the panel at least one channel-shaped ribbing has the concave side turned towards the pitch, so as to form between the pitch and the panel a channel-shaped compartment filled in use with an insulating material; - said second panel is of a shape matching with that of said ribbing and designed to overlappingly couple therewith to define without solution of continuity, an extension in height thereof; - said respective opposite plane faces (22, 23) of said at least one pipe being packed tight between said respective external and top plane surface of the ribbings and said internal and bottom surface of each second panel. - first panels (10b, 10c) made of sheet metal each exhibiting a central portion shaped in such a way as to form on the panel at least one channel-shaped ribbing arranged in use in the direction of the pitch of the roof to be covered, a first plurality of said first panels having the ribbing of a pre-determined first height; and - at least an energy module which is supported by the ribbing of said pre-determined first height, on the side opposite to the pitch; - the energy module comprising at least one second panel made of sheet metal and at least one pipe made of the same metal material as the panels (10,11), with a flattened cross-section, arranged in the direction of the pitch of the roof and with its respective opposite flat faces (22, 23) sandwiched between a respective outer and upper flat surface of the ribbing and a respective inner and lower flat surface of the second panel; characterized in that, in combination: - said central portion of said first panels (10b, 10c) shaped in such a way as to form on the panel at least one channel-shaped ribbing has the concave side turned towards the pitch, so as to form between the pitch and the panel a channel-shaped compartment filled in use with an insulating material; - said second panel is of a shape matching with that of said ribbing and designed to overlappingly couple therewith to define without solution of continuity, an extension in height thereof; - said respective opposite plane faces (22, 23) of said at least one pipe being packed tight between said respective external and top plane surface of the ribbings and said internal and bottom surface of each second panel.