Key data
| Regulation | Resolution of April 14, 2026, from the General Directorate of Energy Policy and Mines |
|---|---|
| BOE Publication | April 27, 2026 |
| Entry into force | April 14, 2026 |
| Holding company | Molinos del Moncayo, SL |
| Location | Fuendejalón, Zaragoza |
| Authorized solar power | 45 MW (Las Azubías photovoltaic solar plant) |
| Authorized storage power | 5 MW (Las Azubías hybridization storage) |
| Existing hybridized wind farm | Las Azubías, 46 MW |
| Authorization type | Prior administrative authorization (first step before construction) |
| Category | Energy / Renewables |
| BOE Reference | BOE-A-2026-9173 |
Molinos del Moncayo SL takes a decisive step in expanding its renewable capacity in Aragón. The General Directorate of Energy Policy and Mines has granted prior administrative authorization for the Las Azubías photovoltaic solar plant, with 45 MW of installed capacity, and for the Las Azubías battery storage module, with 5 MW, both in Fuendejalón, Zaragoza. The resolution, with reference BOE-A-2026-9173, was issued on April 14, 2026 and published on April 27, 2026.
The differentiating element of the project is its design as a hybridization with the Las Azubías wind farm, already existing and with 46 MW of capacity. Sharing the evacuation infrastructure between solar, storage and wind is the key to the efficiency of the overall facility.
What does this regulation establish?
The resolution grants prior administrative authorization to Molinos del Moncayo SL for two differentiated installations that will operate in a coordinated manner:
| Installation | Name | Power | Technology |
|---|---|---|---|
| Solar module | Las Azubías photovoltaic solar plant | 45 MW | Photovoltaic |
| Storage module | Las Azubías hybridization storage | 5 MW | Batteries |
| Hybridized farm (existing) | Las Azubías wind farm | 46 MW | Wind |
The authorization also includes the evacuation infrastructure associated with the new installations, which will be integrated with the existing wind farm infrastructure. This is the key to the hybridization model: instead of building a new evacuation line from scratch, the project leverages the grid connection already available.
It is essential to understand what this authorization is and what it is not. Prior administrative authorization is the first step in the administrative process in Spain for electricity generation installations. It confirms the viability of the project from a regulatory perspective, but does not yet authorize the start of works. The following steps are construction authorization and, finally, operating authorization for final commissioning.
Economic and operational impact
The solar-wind-storage hybridization proposed by this project has concrete operational and economic implications for the developer and the sector:
- Optimization of the connection point: Sharing the evacuation infrastructure of the 46 MW wind farm allows maximizing the use of the grid access point already granted. This avoids the costs and timelines associated with requesting and building a new connection.
- Complementarity of generation profiles: Solar generates mainly during central hours of the day, while wind has a more distributed profile. The combination reduces the total variability of the facility and improves the predictability of energy delivered to the grid.
- 5 MW storage adds flexibility: Batteries allow shifting energy generated during periods of low demand or low prices to periods of higher value, improving the returns of the facility.
- Contribution to renewable objectives: The project is part of Spain's energy transition objectives for the electricity mix, which can facilitate access to green financing or public support instruments.
For the renewable sector in Aragón, this authorization confirms that the hybridization model on existing infrastructure remains a viable path and that the administration is processing these projects. It is a relevant signal for other developers with wind farms studying the addition of solar capacity or storage.
Who does it affect?
- Molinos del Moncayo SL: Direct holder of the authorization. Must now advance towards construction authorization.
- Renewable energy developers in Aragón and Spain: The resolution is a precedent and reference for similar solar-wind hybridization projects.
- Companies with existing wind farms: The model demonstrates that adding solar and storage on already authorized wind infrastructure is an administratively viable path.
- Investors and financiers in the renewable sector: Obtaining prior authorization reduces the regulatory risk of the project and is a relevant milestone for financing structures.
- Engineering, EPC and photovoltaic and battery equipment supply companies: Project advancement activates the associated value chain for construction.
- Network operators and REE: Must integrate the planning of new capacity in Fuendejalón within grid management in Aragón.
Practical example
Imagine you are the business development director of a company operating a 50 MW wind farm in Aragón with its own evacuation infrastructure. You have evacuation capacity not being used during certain hours of the day because the wind does not always blow at maximum.
The Las Azubías model shows you the way: request authorization to add a photovoltaic solar module (in this case, 45 MW) and a battery storage system (5 MW) that share your existing connection point. Solar covers the hours of sunlight that wind does not fully exploit, and batteries manage occasional surpluses.
The result is a hybridized facility that maximizes the return on already amortized evacuation infrastructure, without needing a new grid access point, which is one of the biggest bottlenecks in Spain's renewable sector. Prior administrative authorization, like the one Molinos del Moncayo just obtained, is the first formal milestone that validates this strategy with the administration.
What should companies do now?
- If you are Molinos del Moncayo SL: Initiate procedures for construction authorization, which is the next mandatory step following the prior authorization obtained on April 14, 2026.
- If you have a wind farm: Evaluate the feasibility of adding solar and storage modules on your existing evacuation infrastructure, following the Las Azubías model.