System for a concatenated assembly of rows of photovoltaic panels, configured for mounting at least one photovoltaic panel over a surface, comprising: - at least one bottom profile mounted longitudinally over the surface and comprising, in correspondence with an upper portion, a longitudinal and central groove; - at least one front support anchored to the at least one bottom profile and to a front portion of the at least one photovoltaic panel, consisting of: a first bottom element able to be fixed to the longitudinal and central groove of the at least one bottom profile, and a first upper element to which the first bottom element matches forming a hinge, so that the first upper element is able to rotate within a predetermined angle with respect to the first bottom element; - at least one rear support anchored to the at least one bottom profile and to a rear portion of the at least one photovoltaic panel, comprising a second base profile comprising an upper groove, a box-shaped element engaging and matching with both the at least one bottom profile and the second base profile, and a second upper element coupled with the second base profile; characterized in that said second upper element comprises an external flap and an inner C-shaped contour for mounting a frame of the at least one photovoltaic panel; wherein the system further comprises a hook for fixing the at least one front support to the at least one bottom profile, said hook comprising a front protrusion able to be snapped into a hole of the first bottom element, and a hammer head contour configured to be fixed to the at least one bottom profile by inserting and rotating the hammer head contour in the longitudinal and central groove of the at least one bottom profile. - at least one bottom profile mounted longitudinally over the surface and comprising, in correspondence with an upper portion, a longitudinal and central groove; - at least one front support anchored to the at least one bottom profile and to a front portion of the at least one photovoltaic panel, consisting of: a first bottom element able to be fixed to the longitudinal and central groove of the at least one bottom profile, and a first upper element to which the first bottom element matches forming a hinge, so that the first upper element is able to rotate within a predetermined angle with respect to the first bottom element; - at least one rear support anchored to the at least one bottom profile and to a rear portion of the at least one photovoltaic panel, comprising a second base profile comprising an upper groove, a box-shaped element engaging and matching with both the at least one bottom profile and the second base profile, and a second upper element coupled with the second base profile; characterized in that said second upper element comprises an external flap and an inner C-shaped contour for mounting a frame of the at least one photovoltaic panel; wherein the system further comprises a hook for fixing the at least one front support to the at least one bottom profile, said hook comprising a front protrusion able to be snapped into a hole of the first bottom element, and a hammer head contour configured to be fixed to the at least one bottom profile by inserting and rotating the hammer head contour in the longitudinal and central groove of the at least one bottom profile.