Europe’s electricity grid operators have traced the April 28, 2025 Iberian blackout -- the largest such event in two decades -- to a breakdown in voltage control, according to <a href="https://eepublicdownloads.blob.core.windows.net/public-cdn-container/clean-documents/Publications/2025/iberian-blackout/Final%20Report%20on%20the%20Grid%20Incident%20in%20Spain%20and%20Portugal%20on%2028%20April%202025.pdf" target="_blank">a final report</a> by ENTSO-E’s expert panel.