Patent ID: 8789322

Claim:
A system for butt jointing photovoltaic modules, the system comprising first photovoltaic module and at least one second photovoltaic module for creating a roof-covering, each module comprising: a panel with photovoltaic cells; and a support frame having: at least one longitudinal end profile; and at least one longitudinal side profile; wherein at least one longitudinal support profile is also provided at least for the longitudinal end profile of the support frame of the first module and for the longitudinal end profile of the support frame of the second module; and wherein in each module the at least one longitudinal end profile has: a box-section longitudinal body fixable to the at least one longitudinal side profile; a first longitudinal wing delimiting a seat for engaging the panel; and at least one second longitudinal wing having an arched longitudinal surface for engaging the at least one longitudinal support profile, where the at least one longitudinal support profile has a longitudinal base from which extends: a first longitudinal support and guide element having an arched longitudinal surface of a shape matching that of the at least one second longitudinal wing for engaging with the arched surface of the at least one second longitudinal wing of the at least one longitudinal end profile of the first module; and a second longitudinal support and guide element longitudinally parallel to the first longitudinal support and guide element, and having a longitudinal surface of arched form matching that of the at least one second longitudinal wing for engaging with the arched surface of the at least one second longitudinal wing of the at least one longitudinal end profile of the second module, where the arched surfaces of each of the first and the second longitudinal support and guide elements are positioned on the same side of, but at a different distance from, the longitudinal base.