Latest News

Spain's energy watchdog investigates major companies for historic blackout

Spain's energy regulator and competition authority?said? on Friday that it had opened formal investigations into the country's biggest energy companies and power grid operator in relation to the unprecedented blackout last year which occurred in Spain and Portugal. Evidence was found of long-term violations of certain power sector regulations.

The watchdog has opened investigations into the grid operator Red Electrica (a unit of Redeia) as well as the energy companies Iberdrola Naturgy Endesa Repsol. The watchdog also stated that it was investigating individual power stations.

Iberdrola declined to make a comment. The other companies named did not immediately respond to requests for comments.

Numerous investigations have been conducted to determine the cause of the massive power outage that plunged a large part of Spain and Portugal in darkness for 16 hours or more on April 28, 2025. The majority of investigations focused on identifying the causes without assigning blame.

The National Commission on Markets and Competition (CNMC) said that although the violations were not responsible for the blackout they could have affected the power system operation and may amount to administrative infringements requiring a formal inquiry.

After the close of the market, the names of companies under investigation were revealed on the website.

The CNMC, in a report published last month, recommended that measures be taken to reduce voltage fluctuations on the grid as a result of the blackout as well as boosting French energy links. The CNMC did not blame anyone, saying that it was looking at 'potential breaches separately.

The CNMC reported that it had found a series of events which destabilised the system over time and culminated in the outage on April 28, 2025, whose immediate reason was a'surge in voltage.

The report also said that while some breaches may have been suspected for a long time, this does not mean the companies responsible for the blackout are to be blamed.

The process?can take between nine to 18 months depending on the severity of the infringement. Affected parties can submit arguments and proof. Reporting by Marta Serafinko, Pietro Lombardi. David Latona, Mark Potter and David Latona edited the report.

(source: Reuters)