Spain and Portugal blackout drops 12 GW of clean and nuclear power

NextEnergy Capital, a UK-based renewable energy investment firm, has reported no damage to its NextPower III and V solar portfolios during the April 28–30, 2025 blackout in Spain and Portugal. The grid disturbance was triggered by frequency deviations in Spain’s transmission system, which led to the disconnection of cross-border links and the loss of 12GW of renewable and nuclear generation. At the time of the incident, 88% of Spain’s electricity demand was being met by wind and solar power. According to NextEnergy Capital, the event has highlighted the need for grid stability through co-located battery storage and hybrid solar configurations. Grid restoration was completed that same night using hydro, gas turbines, and imports from France and Morocco. In response, Portugal has temporarily decoupled from the Spanish grid, and Spain has reaffirmed its renewable energy targets while emphasizing battery energy storage and flexibility in future grid planning.