49 MW Solar Photovoltaic Plant in Valladolid: Hybridization with San Lorenzo Wind Farm

Key data

Parques Eólicos San Lorenzo, SLU, now has authorization to build a photovoltaic solar plant of 49.11 MW in Valladolid province. The Resolution of April 16, 2026 from the General Directorate of Energy Policy and Mines (reference BOE-A-2026-9584) grants both prior administrative authorization and administrative construction authorization. The key to the project: the new solar plant will hybridize with the San Lorenzo A wind farm, already operational, of 48.75 MW, sharing the existing evacuation infrastructure.

This solar-wind hybridization strategy is increasingly common in the Spanish renewable sector: it allows maximizing the use of the grid connection already granted, reducing costs and shortening implementation timelines compared to projects starting from scratch.

What does this regulation establish?

The resolution grants two simultaneous authorizations to Parques Eólicos San Lorenzo, SLU:

• Prior administrative authorization: enables the promoter to continue with project development and pre-construction procedures.
• Administrative construction authorization: allows starting construction of the San Lorenzo A photovoltaic solar module and part of its evacuation infrastructure.

Additionally, the resolution declares the project of public utility. This declaration has direct practical consequences: it facilitates the occupation of necessary land and expedites associated administrative procedures, including possible forced expropriation processes if necessary.

Economic and operational impact

Solar-wind hybridization at the same evacuation point is one of the most efficient strategies in renewable development in Spain. By reusing the grid connection of the existing wind farm, the promoter avoids the costs and timelines associated with requesting a new access and connection point, which in the current context of the Spanish electrical system can mean years of waiting and significant costs.

From an operational perspective, the complementarity between solar and wind allows more stable generation throughout the day and year: solar produces mainly during central hours of the day, while wind can generate at any time. This improves the utilization factor of the shared evacuation infrastructure.

For landowners in the three affected municipalities, the public utility declaration means that the promoter can begin negotiations for land occupation with reinforced legal backing, including the possibility of forced expropriation if no agreement is reached.

Who does it affect?

• Parques Eólicos San Lorenzo, SLU: promoting company and main recipient of authorizations. Can begin construction of the solar module.
• Landowners in Castromonte, Peñaflor de Hornija and Torrelobatón: affected by land occupation necessary for installation, with public utility declaration as legal framework.
• Town councils of Castromonte, Peñaflor de Hornija and Torrelobatón: municipalities in Valladolid where the project will be physically developed.
• Other renewable promoters: this project is a reference example for those studying hybridization strategies in Spain to optimize existing evacuation points.

Practical example

Parques Eólicos San Lorenzo, SLU, already operates the San Lorenzo A wind farm with 48.75 MW of installed capacity in Valladolid. That farm has been granted an access point and grid connection. Instead of requesting a new evacuation point for the solar plant—a process that can take years in the current context—the company opts for hybridization: it installs the 49.11 MW solar module and connects it through the same existing evacuation infrastructure.

The result is that the company can launch new renewable generation capacity of almost 50 MW by leveraging the investment already made in grid infrastructure, reducing connection costs and significantly shortening administrative and construction timelines. The public utility declaration, for its part, allows it to negotiate with necessary landowners with greater legal backing, expediting the implementation phase.

What should companies do now?

1. If you are a landowner in Castromonte, Peñaflor de Hornija or Torrelobatón: check if your plot is included in the project scope. The public utility declaration enables the promoter to begin occupation negotiations with legal backing. Consult the complete resolution in the BOE and, if you receive communication from the promoter, seek advice before signing any agreement.
2. If you are a renewable promoter studying hybridization projects: analyze whether you have existing wind or solar farms with available evacuation capacity. This project is an example of how to optimize already-granted assets to accelerate new developments.
3. If you are an energy advisor or consultant: incorporate this case as a reference for solar-wind hybridization with public utility declaration in Castilla y León for similar projects in process.
4. If you represent one of the three affected municipalities: verify the status of urban planning procedures and coordination with the promoter for the solar module construction phase.