A solar panel (12; 112; 212; 312) including: - a structure; - a plurality of photovoltaic cells (16A, 16B; 316A, 316B), each cell (16A, 16B; 316A, 316B) defining a lateral contact face (30A, 30B) and including a base element (20A, 20B), a grid of electrical conductors (24A, 24B) and a protective element (22A, 22B) made of transparent material, the grid (24A, 24B) being disposed between the protective element (22A, 22B) and the base element (20A, 20B) and including at least one conductive wire running along the lateral contact face (30A, 30B) of the cell (16A, 16B; 316A, 316B); a plurality of rows of photovoltaic cells (16A, 16B, 316A, 316B), in the same row, the photovoltaic cells (16A, 16B, 316A, 316B) are interconnected by cabling means; pairs of photovoltaic cells (16A, 16B, 316A, 316B), each cell of a pair of photovoltaic cells belonging to a row adjacent to each other, the two cells (16A, 16B; 316A, 316B) of a pair being disposed on the structure so that at least one part of each of the lateral contact faces (30A, 30B) is disposed facing the other part and so that the protective elements (22A, 22B) of these cells (16A, 16B; 316A, 316B) form a panel surface; the solar panel (12; 112; 212; 312) being characterized in that it includes a barrier (18A; 118A; 218A; 318A) made of dielectric material disposed on the structure between the lateral contact faces (30A, 30B) of the two photovoltaic cells (16A, 16B, 316A, 316B) of a pair, extending along the opposite parts of these faces (30A, 30B) and projecting with respect to the panel surface, the barrier (18A; 118A; 218A; 318A) being disposed between the rows of cells (16A, 16B; 316A, 316B), the barrier (18A; 118A; 218A; 318A) being disposed within the pairs formed by two photovoltaic cells (16A, 16B; 316A, 316B) between which the voltage is greater than 30 V. - a structure; - a plurality of photovoltaic cells (16A, 16B; 316A, 316B), each cell (16A, 16B; 316A, 316B) defining a lateral contact face (30A, 30B) and including a base element (20A, 20B), a grid of electrical conductors (24A, 24B) and a protective element (22A, 22B) made of transparent material, the grid (24A, 24B) being disposed between the protective element (22A, 22B) and the base element (20A, 20B) and including at least one conductive wire running along the lateral contact face (30A, 30B) of the cell (16A, 16B; 316A, 316B); a plurality of rows of photovoltaic cells (16A, 16B, 316A, 316B), in the same row, the photovoltaic cells (16A, 16B, 316A, 316B) are interconnected by cabling means; pairs of photovoltaic cells (16A, 16B, 316A, 316B), each cell of a pair of photovoltaic cells belonging to a row adjacent to each other, the two cells (16A, 16B; 316A, 316B) of a pair being disposed on the structure so that at least one part of each of the lateral contact faces (30A, 30B) is disposed facing the other part and so that the protective elements (22A, 22B) of these cells (16A, 16B; 316A, 316B) form a panel surface; the solar panel (12; 112; 212; 312) being characterized in that it includes a barrier (18A; 118A; 218A; 318A) made of dielectric material disposed on the structure between the lateral contact faces (30A, 30B) of the two photovoltaic cells (16A, 16B, 316A, 316B) of a pair, extending along the opposite parts of these faces (30A, 30B) and projecting with respect to the panel surface, the barrier (18A; 118A; 218A; 318A) being disposed between the rows of cells (16A, 16B; 316A, 316B), the barrier (18A; 118A; 218A; 318A) being disposed within the pairs formed by two photovoltaic cells (16A, 16B; 316A, 316B) between which the voltage is greater than 30 V.