Spain leans on renewables after blackout

A year after the Iberian blackout, Spain is adding more renewables and more grid hardware, not backing away from solar and wind. (ec.europa.eu) (ree.es) The outage hit at 12:33 CEST on April 28, 2025, when Spain and Portugal lost the most severe chunk of power seen on the European grid in more than two decades. Power returned to normal in Portugal by 00:22 and in Spain by 04:00 on April 29, according to the European Commission’s incident summary. (ec.europa.eu) Spanish grid data and reporting from the time showed about 15 gigawatts of generation disappeared in roughly five seconds, equal to nearly 60% of demand. The crash cut rail service, traffic lights, telecommunications and card payments across the peninsula. (english.elpais.com 1) (english.elpais.com 2) A power grid has to keep frequency and voltage steady every second, like keeping a bicycle upright while the road keeps changing. Spain’s problem was not just making clean electricity; it was keeping enough fast support on the system when a big disturbance hit. (technologyreview.com) (carbonbrief.org) That is why the response has centered on batteries, controls and transmission lines as much as on new wind and solar farms. Spain’s 2021-2026 grid plan says the network upgrades are meant to connect 37,000 megawatts of new renewables while preserving security of supply. (planificacionelectrica.es) (redeia.com) Red Eléctrica said in March that Spain added nearly 10 gigawatts of new solar photovoltaic and wind capacity in 2025. Counting self-consumption, renewable generation reached 56.6% last year, while total installed capacity rose to 142.5 gigawatts and renewables made up 68.9% of that fleet. (ree.es) (renewablesnow.com) Solar has been the biggest piece of that buildout. Spain crossed 50 gigawatts of installed solar capacity in early 2026 after adding about 8.7 gigawatts in 2025, according to Red Eléctrica data cited by PV Magazine. (pv-magazine.com) Storage is growing from a much smaller base, but quickly. ESS News reported on April 28 that installed battery energy storage capacity in Spain had risen 589% since the 2025 blackout. (ess-news.com) Spain has also been changing the rules for how renewables behave on the grid. ESS News said solar and wind are being brought into voltage-control services that were historically handled by conventional plants, while gas-fired generation still has a larger stabilizing role during the transition. (ess-news.com) That matters in a year when gas markets have been rattled again by conflict in the Middle East. The International Energy Agency said on April 24 that the conflict has pushed up volatility and delayed the expected easing in global liquefied natural gas supply. (iea.org) Spain is less exposed to that shock in power prices than countries that still burn more gas for electricity. Ember said gas set Spain’s electricity price in only 15% of hours in 2026 so far, versus 89% in Italy. (ember-energy.org) The argument over what caused the blackout has not disappeared. Some analysts said low-inertia conditions from a solar-heavy mix may have worsened the cascade, while Spanish officials and other experts said the event exposed broader failures in system protection, voltage management and planning rather than a simple renewables problem. (argusmedia.com) (technologyreview.com) (carbonbrief.org) The practical result is that Spain is treating the blackout as a grid-design problem inside a fast energy transition. One year on, the country is building a system that can carry more renewable power without letting another five-second failure knock out the peninsula. (ec.europa.eu) (planificacionelectrica.es)