By Pietro Lombardi MADRID (Reuters) -Spanish grid operator Redeia blamed power plants for the massive blackout that affected the Iberian peninsula in April, as it disputed a government report that said its failure to calculate the correct energy mix was a key factor.

Spanish authorities say the massive power outage in April across Spain and Portugal was due to technical and planning errors that led to a cascade of failures in the grid.

A view shows Santa Llogaia electrical sub-station connected to the interconnection grid between France and Spain that tripped after a sudden, large drop in power supply and caused the major blackout in the Iberian Peninsula, in the village of Santa Llogaia d'Alguema, near Figueres, Spain April 29, 2025. REUTERS/Bruna Casas/File Photo