Solar Dominates Spain’s Renewable Growth in 2025

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Spain emerged as one of Europe’s strongest renewable energy performers in 2025, adding nearly 9 gigawatts of new clean power capacity. Solar photovoltaic installations accounted for almost ninety percent of this growth, confirming solar’s role as the dominant technology in the country’s energy transition. Total installed solar capacity surpassed 48 gigawatts, while wind power capacity continued to grow more modestly.

Despite this strong momentum, grid saturation is becoming a serious constraint. More than eighty percent of grid connection nodes are now considered full, sharply limiting the number of new projects that can be connected. In 2025, developers requested access for tens of gigawatts of new capacity, but only a small fraction was approved, with many projects rejected or delayed due to insufficient network capacity.

The sector is also facing permitting challenges, legal disputes affecting wind projects, and uncertainty around offshore wind development. To maintain growth into 2026, industry stakeholders are calling for faster grid expansion, clearer planning frameworks, and greater investment in energy storage. Storage is increasingly seen as essential for integrating large volumes of solar and wind while maintaining system stability.