The Itaipu Dam, jointly operated by Paraguay and Brazil on the Paraná River, was certified by Guinness World Records for the highest cumulative electricity output of any power plant over its 40 years of operation.
Record no. MRB-2026-006388
Largest cumulative hydroelectric energy production
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.