Castilla-La Mancha was the most chosen location, with 1,924 MW submitted, while Zelestra led the ranking of developers thanks to the REINA mega-project totalling 887 MW.

Renewable energy developers submitted a portfolio of 5,141 MW of large-scale solar projects for environmental permitting across various autonomous communities during the first seven months of 2025, consolidating the expansion of the photovoltaic sector in the country.

According to public data, Castilla-La Mancha concentrates the largest permitted capacity, with over 1,924 MW across several projects. It is followed by Andalusia with 1,088 MW, Castile and León with 1,040 MW, and Extremadura, a traditional solar hub, with 533 MW.

Among the largest projects, the REINA plant stands out, promoted by Zelestra, with 887 MW, located in Castilla-La Mancha. Also noteworthy are MAGERIT FV3 (268.95 MW), developed by Harbour Sevilla Manchuela, and Piedrahita de Castro (262.9 MW), led by UKA Iberia.

In terms of leading developers by total permitted capacity, Zelestra tops the list with the 887 MW from REINA, followed by RPC CPP Investments (685 MW), Naturgy (420 MW), UKA Iberia (415 MW), and Jinko (389 MW). Together, these companies account for 54% of the total MW submitted in the first seven months of the year.

This momentum reflects not only the sector’s strong investment appetite, but also the race to position ahead of the country’s decarbonisation and renewable deployment targets under the PNIEC 2023–2030 framework.

To meet this target, Spain must add 21,368 MW of additional solar capacity by the end of the decade. This translates to an annual average of 3,561 MW to be installed over the next six years.

Currently, the country has 35,632 MW of solar capacity in operation, and in the first seven months of 2025 alone, 3,029 MW were commissioned — a promising yet demanding pace.

Although the sector anticipates a slowdown after 2027, there is still optimism about reaching the 76 GW solar target by 2030, a figure that includes 19 GW from self-consumption.

Finally, it is worth noting that over the past 12 months, more than 33 GW of solar projects have been submitted for permitting, including small-scale developments managed by regional authorities.