Key data
| Regulation | Resolution of July 8, 2026, from the Directorate General for Energy Policy and Mines |
|---|---|
| BOE Publication | August 6, 2026 |
| Effective date | August 6, 2026 |
| Affected developer | Iberdrola Renovables Castilla y León, SA |
| Denied project | Radona II photovoltaic module — 32,655 MW of installed capacity |
| Location | Taroda and Alcubilla de las Peñas (Soria) |
| Associated wind farm | Radona II — 32 MW of installed capacity (existing) |
| File start date | February 2022 |
| Prior authorization obtained | November 2024 (prior administrative authorization) |
| Category | Energy |
| BOE Reference | BOE-A-2026-17174 |
A renewable project can have prior authorization and still not be built. That is exactly what happened to Iberdrola Renovables Castilla y León with the Radona II photovoltaic module: four years of processing, prior administrative authorization obtained in November 2024, and finally a denial resolution published in the BOE on August 6, 2026 (BOE-A-2026-17174).
The Directorate General for Energy Policy and Mines dismisses the application for administrative authorization of construction and declaration of public utility of the Radona II photovoltaic module, of 32,655 MW, intended to be hybridized with the homonymous wind farm already operating in Taroda and Alcubilla de las Peñas (Soria), of 32 MW. The reason: the developer did not provide the required documentation despite receiving multiple requests for correction.
What does this resolution establish?
The resolution specifically denies the administrative authorization of construction and the declaration of public utility of the Radona II photovoltaic module. It does not annul the prior authorization already granted, but completely blocks the project's progress to the construction phase.
The specific reasons for the denial are three accumulated documentary non-compliances, all required and not provided by the developer:
| Required documentation not provided | Body/Instrument that required it |
|---|---|
| Construction authorizations for electrical energy evacuation infrastructure | Requirement of the construction authorization procedure |
| Addendum to the project with regional environmental compliance | Requirement for coordination with the autonomous administration of Castilla y León |
| Steppe bird conservation plan | Environmental Impact Determination Report |
The file began in February 2022. Over more than four years, the administration made multiple requests for correction that the developer did not respond to adequately. The denial occurs, therefore, not for substantive reasons about the project's viability, but due to deficient documentary management and coordination between the regional and state files.
Economic and operational impact
For Iberdrola, the immediate impact is the blocking of 32,655 MW of photovoltaic capacity that will not be able to generate income until the situation is resolved. Hybridization with the Radona II wind farm (32 MW already operating) would have allowed optimization of existing evacuation infrastructure and improved profitability of the combined asset.
Beyond the specific case, this resolution has systemic impact for the renewable sector:
- Opportunity cost: each month of blocking in a project of this scale means lost income from electricity generation.
- Risk of permit expiration: stalled files can lose validity if not reactivated within administrative deadlines.
- Reactivation cost: resuming a denied file implies new processing, updating environmental studies and possible loss of position in the grid access queue.
- Reputational and financial risk: investors and financiers of renewable projects view files with a history of unfulfilled requests negatively.
Who does it affect?
- Iberdrola Renovables Castilla y León, SA: direct developer, with the project blocked in the construction phase.
- Developers of wind-solar hybridization projects: any company that is processing or planning to process the hybridization of an existing wind farm with photovoltaic modules.
- Renewable energy developers in Spain: the resolution establishes a clear precedent on the consequences of failing to coordinate regional and state files.
- Investors and funds with renewable assets in processing: must review the documentary status of their project portfolios.
- Legal and technical advisors for renewable projects: the resolution reinforces the need for active monitoring of administrative requests.
- Companies with projects in Castilla y León: coordination with the regional administration for environmental compliance is a critical point identified in this file.
Practical example
Imagine you are the development director of a medium-sized renewable company. You have a hybridization project: a 20 MW wind farm already operating in Castilla y León to which you want to add 15 MW photovoltaic. In 2023 you obtain prior administrative authorization. In 2024 you submit the application for construction authorization.
The state administration asks you for three documents: construction authorizations for the evacuation infrastructure, the addendum to the project with environmental approval from the Junta de Castilla y León, and the Steppe Bird Conservation Plan required by the environmental impact report. Your technical team is overloaded and requests accumulate without complete response.
The result, as in the Radona II case, would be the denial of construction authorization. Four years of processing, engineering costs, environmental studies and administrative fees lost, and the project blocked without the ability to generate income. The lesson from the Radona II case is that prior authorization does not guarantee construction: the construction phase has its own documentary requirements, and failure to meet any of them can bring down the entire project.
What should companies do now?
- Audit the documentary status of all projects in processing: review whether there are pending correction requests, especially in the construction authorization phase.
- Verify coordination between regional and state files: ensure that the project addendum has environmental compliance from the corresponding autonomous community before submitting it to the state body.
- Obtain and provide the Steppe Bird Conservation Plan if the project is in a sensitive area: this document is required by the Environmental Impact Determination Report and its absence is a direct cause of denial.
- Process construction authorizations for evacuation infrastructure in parallel: do not wait to have construction authorization for the generating module to start evacuation procedures.
- Establish an active monitoring system for administrative requests: assign a specific person responsible for each file to control response deadlines to requests.
- Consult with advisors specialized in energy and environmental law if there are doubts about the coordination status between administrations in hybridization projects.
Frequently asked questions
Why was the Radona II photovoltaic authorization denied if it already had prior authorization?
Prior administrative authorization (obtained in November 2024) and construction authorization are two distinct phases of the procedure. The denial occurred in the construction phase because Iberdrola did not provide three required documents: construction authorizations for evacuation infrastructure, the project addendum with regional environmental compliance, and the Steppe Bird Conservation Plan required by the Environmental Impact Determination Report.
What is the hybridization of a wind farm with photovoltaic modules and what requirements does it have?
Hybridization consists of adding photovoltaic generation capacity to an already existing wind farm, sharing evacuation infrastructure. In the case of Radona II, it was intended to add 32,655 MW photovoltaic to the 32 MW wind farm already operating in Taroda and Alcubilla de las Peñas (Soria). It requires prior administrative authorization, construction authorization (with complete environmental and evacuation documentation) and declaration of public utility.
What documents are essential to obtain construction authorization for a renewable project in Spain?
According to the Radona II resolution, the following are critical: construction authorizations for evacuation infrastructure, the project addendum with environmental compliance from the corresponding autonomous community, and, when the project is located in areas with steppe birds, the Conservation Plan required by the Environmental Impact Determination Report. The absence of any of these documents, following correction requests, can result in denial.
How long was the Radona II file in processing when it was denied?
The file began in February 2022 and the denial resolution was published on August 6, 2026, which is more than four years of processing. During that period, the project obtained prior administrative authorization in November 2024, but failed to complete the documentary requirements for the construction phase.
Can Iberdrola appeal the denial or restart the Radona II file?
The resolution does not specify whether Iberdrola can appeal or restart the file. In general terms of Spanish administrative procedure, a denial resolution can be subject to an appeal for reconsideration or review, and if applicable, administrative litigation. To know the specific options in this file, it is necessary to consult the full text of the resolution and seek advice from a specialist in energy and administrative law.
Official source
Consult complete regulation in official source (BOE-A-2026-17174)
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-2026-17174