Spain significantly expanded solar power capacity in 2025
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In 2025, Spain increased its solar power capacity by 10.1 GW, bringing the nation’s total to 46,286 MW for ground-mounted systems and 9,276 MW for self-consumption.
The Spanish PV association, UNEF, reported that solar power now provides almost 23% of Spain’s electricity. Ground-mounted solar installations led the growth, increasing by 31% from the previous year, while self-consumption installations decreased slightly. However, the increase in solar generation is also creating challenges.
Wholesale electricity prices fell as solar output rose, reducing revenue for solar assets. Spain experienced 797 hours in 2025 where electricity prices were at or below zero, a trend continuing into 2026. To support further growth, UNEF highlighted the need to electrify more end uses, noting 71.5 GW of demand connection capacity is either approved or planned through 2030. The organization also emphasized the growing importance of energy storage, with behind-the-meter installations increasing by 65% in 2025.
The solar sector contributed €9.84 billion to Spain’s GDP in 2025 and supported 134,708 jobs.
