Total installed solar capacity in Spain has crossed the 50 GW milestone, accounting for more than a third of the country’s overall power generation capacity, according to the transmission system operator, Red Eléctrica de España (REE). Of the total solar capacity, 9.3 GW comes from prosumers.
According to REE’s data, Spain’s total solar capacity currently stands at 50.2 GW, or 34% of the overall electricity generation capacity, which amounts to 147.8 GW.
When it comes to prosumers, Spanish solar industry association Unión Española Fotovoltaica (UNEF) estimated cumulative self-consumption installations at 9.3 GW at the end of 2025, while REE’s figure as of February 1 was 8.89 GW.
Spain installed 8.7 GW of new solar capacity in 2025
In 2025, the country added 8.7 GW of new photovoltaic capacity. Solar energy accounted for 18.4% of the country’s total electricity output.
While Spain remains one of the top European Union countries by installed renewable energy capacity, Germany’s solar fleet is more than twice as large, at 117 GW at the end of 2025. The country surpassed the 100 GW threshold in late 2024, according to earlier reports.
Wind is the second-largest source of electricity in Spain, accounting for 22.5% of total generation capacity, with about 33.3 GW installed.
Wind is the second-largest power source in Spain
Combined-cycle gas ranks third, with about 26 GW, or 17.8%, while hydropower is fourth, with 17 GW, or 11.6%, according to REE’s data. Nuclear capacity stands at 7.1 GW, or 4.8% of the total.
In 2025, renewable energy developers in Spain requested grid access and connection permits for a total of 40 GW of capacity, but only 4.5 GW was approved. About 25 GW was rejected due to congestion, and 8.5 GW remains under review, according to pv magazine.
