A method for regenerating defects in solar panels of a solar panel installation, said solar panel installation comprising: - at least one solar panel comprising at least one photovoltaic cell, preferably a plurality of electrically connected photovoltaic cells, wherein the at least one solar panel has a negative pole and a positive pole, - at least one supporting structure in which the at least one solar panel is mounted, the method comprises the following steps: (a) electrically connecting the at least one supporting structure with a first pole of at least one voltage supply, (b) electrically connecting a second pole of the at least one voltage supply with at least one of the poles (4,5), preferably both poles (4,5), of the at least one solar panel, (c) applying a predetermined voltage, the regeneration voltage, between the at least one solar panel and the at least one supporting structure by means of the at least one voltage supply, and maintaining the regeneration voltage for a predetermined duration, the regeneration duration, and (d) after the regeneration duration, undoing the electrical connection between the at least one voltage supply and the at least one solar panel, as well as the electrical connection between the at least one voltage supply and the at least one supporting structure and wherein the solar panel installation further comprises an electrical connection between the at least one solar panel and an electricity grid, wherein the method further comprises, between step (a) and step (b), a step (a') of undoing the electrical connection between the at least one solar panel and the electricity grid, and wherein step (d) further comprises electrically re-connecting the at least one solar panel with the electricity grid; and wherein the solar panel installation comprises at least one converter, said at least one converter being located between the at least one solar panel and the electricity grid and electrically connected to both, and said at least one converter converting the DC voltage of the at least one solar panel to an AC voltage suitable for supplying to the electricity grid, wherein, in step (a') in the method, the electrical connection between the at least one solar panel and the electricity grid is interrupted before the converter. - at least one solar panel comprising at least one photovoltaic cell, preferably a plurality of electrically connected photovoltaic cells, wherein the at least one solar panel has a negative pole and a positive pole, - at least one supporting structure in which the at least one solar panel is mounted, (a) electrically connecting the at least one supporting structure with a first pole of at least one voltage supply, (b) electrically connecting a second pole of the at least one voltage supply with at least one of the poles (4,5), preferably both poles (4,5), of the at least one solar panel, (c) applying a predetermined voltage, the regeneration voltage, between the at least one solar panel and the at least one supporting structure by means of the at least one voltage supply, and maintaining the regeneration voltage for a predetermined duration, the regeneration duration, and (d) after the regeneration duration, undoing the electrical connection between the at least one voltage supply and the at least one solar panel, as well as the electrical connection between the at least one voltage supply and the at least one supporting structure