A major power blackout hit the Iberian Peninsula recently. A fresh report, released this Friday, shows what went wrong. It points to a series of sudden shutdowns in renewable power sources. This then caused the system to lose sync with the rest of Europe’s power grid.
Forty-five experts worked on this report. They came from network operators and regulators across 12 countries. They called the power failure a “scale 3” event. This is the most serious level under European rules. It was “the most significant” problem in the European electricity system in over 20 years. Millions of people felt its effects, and key services faced serious disruptions.
The blackout happened on April 28. The report’s findings are based on solid facts. These facts come from data gathered until August 22, as reported by the Lusa agency.
Unpacking the Blackout
The European Network of Transmission System Operators for Electricity, or ENTSO-E, led the investigation. Their analysis shows the problems started at 12:32 PM, Brussels time. Many solar and wind power plants in southern Spain suddenly went offline. More power losses quickly followed in areas like Granada, Badajoz, Seville, and Cáceres.
Within a single minute, the grid lost over 2.5 gigawatts of power production. This massive drop reduced the network’s ability to balance itself. It caused electric voltage to spike. This then set off a chain reaction across the whole Iberian Peninsula.
By 12:33 PM, the Iberian power system was out of sync with Europe. Frequency and voltage wildly fluctuated. Even the automatic defense systems in Portugal and Spain could not fix it.
Soon after, the power links to France and Morocco also failed. This cut off the Peninsula from the wider grid. The electrical systems in both Portugal and Spain completely crashed.
The full report was originally due in October 2026. Now, it will arrive earlier, in the first three months of 2026. This final report will share specific advice. The goal is to stop similar incidents from happening again. This applies not just to the Iberian Peninsula, but to the entire European power network.