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The grid operator, the government and watchdog are all blamed in Spain's Senate investigation of blackouts

According to preliminary conclusions published on Wednesday, an investigation by the Spanish Senate has blamed?the government as well as the country's grid operator and energy monitor for the 'unprecedented' blackout last year.

The upper house, which is controlled by opposition People's Party(PP), is the first to place blame for the outage on April 28, '2025 that left large areas of Spain and 'Portugal in darkness for as long as 16 hours.

According to the nine-month investigation, the blackout wasn't an accident that was unforeseeable. It was caused by structural flaws that had been known for years.

The blackout was a result of a vulnerability that had been known for some time. It also reflected a failure by the PP to act with diligence.

The preliminary report noted that repeated voltage fluctuations in the weeks leading up to and including the blackout were evidence of the system's increasing problems.

The Senate Commission held the grid operator 'Red Electrica', a Redeia unit, and the Energy Ministry primarily liable?for this outage. It also criticized energy and antitrust regulator CNMC, for what they referred to as inaction on the part of the regulator and supervisory authorities.

The inquiry 'heard testimony from dozens witnesses, including Energy minister Sara Aagesen and Redeia Chair?BeatrizCorredor, as well as CNMC Head?CaniFernandez.

The final report is due this week. However, no changes are expected to the preliminary findings. Reporting by Emma Pinedo, Pietro Lombardi and David Latona; editing by David Latona

(source: Reuters)