Sunday, August 3, 2025

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Spain’s Grid Goes Dark After Hitting 78% Renewables

Spain’s ambitious renewable energy mix faced a harsh reckoning as a massive grid failure swept across the Iberian Peninsula—cutting power to millions in Spain and Portugal—just minutes after the country reached record-low reliance on dispatchable generation.

At 12:30 p.m. local time, Spain was running on a grid powered by approximately 78% solar and wind, with nuclear at 11.5%, cogeneration at 5%, and combined cycle gas providing a mere 3.37%, or less than 1 GW. By 12:35 p.m., the system buckled.

Grid operators struggled to stabilize a network with high photovoltaic penetration and minimal spinning reserve, leading to cascading outages.

As of 15:25, real-time demand had plummeted to 13,465 MW—nearly half the 26,907 MW scheduled. While Spain’s Red Eléctrica aimed for a 6–10 hour recovery, neighboring Portugal warned restoration could take up to a week, citing “a rare atmospheric phenomenon” and complex international grid rebalancing.

Experts have long warned that grids saturated with intermittent sources, like solar and wind, require more robust support infrastructure—especially inertia-providing spinning machines like gas turbines or hydro.

Observers further warned of cascading complications: substations relying on battery backups could begin failing after 10 hours, adding “nightmare” logistics to manual resets and electronic failures. If the outage exceeded 12 hours, the collapse of basic control systems could escalate dramatically.

As of this morning however, power has been restored to 90% across Spain and Portugal, while investigators continue to review what specifically went wrong.


Information for this briefing was found via the sources mentioned. The author has no securities or affiliations related to this organization. Not a recommendation to buy or sell. Always do additional research and consult a professional before purchasing a security. The author holds no licenses.

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