Key data
| Regulation | Resolution of June 3, 2025, from the General Directorate of Energy Policy and Mines |
|---|---|
| Publication | August 22, 2026 |
| Entry into force | Not specified in the resolution |
| Authorized holder | Naturgy Vento, SAU |
| Solar installation | Casa del Aire I Hybridization photovoltaic park — 49.35 MW |
| Associated wind installation | Casa del Aire I wind farm — 50.4 MW |
| Location | El Bonillo, Albacete (Castilla-La Mancha) |
| Category | Energy / Renewables |
| BOE Reference | BOE-A-2026-18030 |
Naturgy Vento, SAU has the green light to build the photovoltaic solar park Casa del Aire I Hybridization, with an installed capacity of 49.35 MW, in the municipality of El Bonillo, Albacete. The installation will be hybridized with the Casa del Aire I wind farm, which already operates with 50.4 MW, adding a combined renewable capacity exceeding 99 MW at the same connection point.
The authorization, granted by the General Directorate of Energy Policy and Mines, is contained in the Resolution of June 3, 2025 and was published in the BOE on August 22, 2026 with reference BOE-A-2026-18030. The project ownership was previously transferred from Energías Alternativas Castilla La Mancha, SLU, a change that was approved in February 2025.
What does this regulation establish?
The resolution grants prior administrative authorization for the photovoltaic solar park and its evacuation infrastructure, which includes a 30 kV underground network and the expansion of the existing electrical substation.
The favorable environmental impact statement (DIA) was issued in February 2025 and establishes the following mandatory conditions:
| Environmental condition | Detail |
|---|---|
| Fire protection self-protection plan | Mandatory before the start of works |
| Habitat compensatory measures | Must be operational before the start of works |
| Restriction of panels on slopes | Prohibition of installation on slopes exceeding 12% |
| Watercourse crossings | Must be carried out underground with a minimum clearance of 1 meter |
The project received no objections during the public information period and has the approval of all bodies consulted during the processing.
Economic and operational impact
Solar-wind hybridization is a strategy that allows maximizing the use of existing evacuation infrastructure: instead of building a new high-voltage line and substation from scratch, the solar park shares the connection point of the already operational wind farm. This significantly reduces grid connection costs and commissioning timelines.
For Naturgy Vento, SAU, the immediate operational implications are:
- Need to execute the fire protection self-protection plan before starting any work.
- Activation of habitat compensatory measures prior to the start of construction.
- Design of the panel layout respecting the 12% maximum slope restriction, which may reduce usable surface area in areas with greater relief.
- Specific engineering for underground watercourse crossings with a minimum clearance of 1 meter, which implies higher civil works costs at those points.
- Coordination with the expansion of the electrical substation and the installation of the 30 kV underground network.
Who does it affect?
- Naturgy Vento, SAU: holder of the authorization and responsible for complying with all DIA conditions and executing the evacuation infrastructure.
- Local administration of El Bonillo (Albacete): municipality where the project is located, with implications for building permits and urban coordination.
- Regional administration of Castilla-La Mancha: involved in monitoring environmental conditions and territory management.
- Civil and electromechanical contractors and suppliers: companies that will execute the construction of the park, the 30 kV network and the substation expansion.
- Competitors in the renewable energy market: reference of a hybridization model that can be replicated at other sites with existing wind farms.
Practical example
A renewable energy developer that has an operational wind farm with underutilized evacuation capacity can replicate Naturgy's model at Casa del Aire I. In this specific case, the 50.4 MW wind farm shares an evacuation point with the new 49.35 MW solar park. Since wind and solar generation have complementary hourly profiles (wind is usually stronger at night and in winter; sun, during the day and in summer), hybridization allows increasing the utilization factor of the evacuation infrastructure without needing to expand the high-voltage line capacity.
In practice, before starting works, the Naturgy Vento team will have to demonstrate to the administration that the fire protection self-protection plan is approved and that the habitat compensatory measures are active. Non-compliance with these prior conditions could halt the start of construction and delay the project's commissioning.
What should companies do now?
- If you are Naturgy Vento or a subcontractor of the project: verify that the fire protection self-protection plan is drafted and approved before starting any earthwork.
- Activate habitat compensatory measures prior to the start of works, as required by the DIA of February 2025.
- Review the panel implementation design to ensure that no area exceeds 12% slope; adjust the layout if necessary.
- Plan watercourse crossings with underground engineering and a minimum clearance of 1 meter, integrating it into the civil works budget.
- Coordinate the substation expansion and 30 kV network with the solar park construction timelines to avoid bottlenecks in evacuation.
- If you are a renewable developer with existing wind farms: analyze whether your evacuation infrastructure has available capacity to hybridize with photovoltaic solar, following the model of this resolution.
Frequently asked questions
What is solar-wind hybridization and why does the BOE authorize it?
Hybridization consists of installing a photovoltaic solar park that shares the evacuation infrastructure (substation and high-voltage line) of an already existing wind farm. In this case, the 49.35 MW solar park connects to the same point as the Casa del Aire I wind farm of 50.4 MW. The BOE publishes the prior administrative authorization because it is a mandatory procedure for electricity generation installations of this magnitude, regulated by the electricity sector regulations.
What environmental conditions must Naturgy meet before starting works?
The favorable environmental impact statement (issued in February 2025) requires: having the fire protection self-protection plan operational, activating habitat compensatory measures, not installing panels on slopes exceeding 12% and executing watercourse crossings underground with a minimum clearance of 1 meter. The first two conditions must be met before the start of works.
Why did the project ownership change to Naturgy Vento?
The project was originally promoted by Energías Alternativas Castilla La Mancha, SLU. The ownership was transferred to Naturgy Vento, SAU, and this change was approved by the administration in February 2025, before the prior administrative authorization contained in this resolution was granted.
What evacuation infrastructure does the project include?
The authorization covers, in addition to the 49.35 MW solar park, a 30 kV underground network and the expansion of the existing electrical substation, necessary to integrate the new solar generation at the evacuation point shared with the Casa del Aire I wind farm.
Was there opposition to the project during processing?
No. According to the resolution, the project received no objections during the public information period and has the approval of all bodies consulted during the administrative processing.
Official source
Consult complete regulation in official source
Notice: This article is for informational purposes only and does not constitute legal advice. For specific decisions, consult a qualified professional. Source: https://www.boe.es/diario_boe/txt.php?id=BOE-A-2026-18030