Among the companies under investigation are Iberdrola, Naturgy, Endesa, Repsol, Ascó-Vandellòs, and Bahía de Bizkaia, in addition to the grid operator, Red Eléctrica. These companies include renewable energy facilities, combined cycle plants, and nuclear power plants, such as the one in Ascó.
The CNMC indicated that, for the energy companies, the detected non-compliances would not have caused a supply risk or serious problems. However, it considers Red Eléctrica's non-compliances more serious, as they could have caused harm to the system or to third parties.
“"These non-compliances do not, by themselves, imply attributing the origin or cause of the blackout to the affected companies, given that the incident was multifactorial."
The irregularities could lead to administrative sanctions, although the resolution of the investigations is expected to take between 9 and 18 months, during which time the involved parties can submit allegations.
The Commission reiterated that the blackout on April 28, 2025, was caused by multiple events that progressively destabilized the electrical system. The investigation into possible cyberterrorism was already closed in January by the Audiencia Nacional due to lack of evidence.
