En+ Group completed a comprehensive modernization of hydro unit No. 1 at Bratskaya HPP, during which a new impeller was installed and all main and auxiliary units were replaced or repaired. As a result, the efficiency of the hydropower unit increased by 5.5 p.p. to 96.5%. By 2026, it is planned to replace two more impellers. As a result, all the station's impellers will be renewed.