Spain’s April 2025 grid collapse was caused by voltage governance failures, not renewables; a year later solar deployment accelerated and electricity prices are Europe’s third lowest.
Key Takeaways
ENTSO-E’s final report ruled out inertia loss from renewables as a cause; the blackout was a “perfect storm” of voltage control failures triggering cascading disconnections.
Spain added 13.8 GW of new solar in 2025, up from 12.3 GW in 2024, with July 2025 setting a record monthly capacity addition.
Spain’s March 2026 wholesale power price averaged €43/MWh, versus €99/MWh in Germany and €144/MWh in Italy, directly attributable to high renewable penetration.
Oxford professor Jan Rosenow: wholesale prices would have been 40% higher in H1 2024 without recent wind and solar buildout.
A regulatory change in April 2026 now allows wind and solar to provide voltage compensation services, the gap that forced post-blackout reliance on gas running in “reinforced mode.”
