Key data
| Regulation | Resolution of May 20, 2026, from the General Directorate of Energy Policy and Mines |
|---|---|
| Publication | June 25, 2026 |
| Effective date | June 25, 2026 |
| Promoter | Power Tarida, SL |
| Cancelled project | Perdiguero energy storage plant — 100 MW installed capacity |
| Location | Benasque and Sahún (Huesca province) |
| Evacuation infrastructure | Connected to the Eriste 220 kV substation of Red Eléctrica |
| File | ALM-013 |
| Expiry of access and connection permits | February 2026 |
| Withdrawal submitted | April 2026 |
| Category | Energy — Storage |
A 100 MW energy storage project in the Aragonese Pyrenees has just been definitively cancelled. Not due to lack of investment or technical problems, but because of an unfavorable environmental impact declaration that made it impossible to continue. The Resolution of May 20, 2026 from the General Directorate of Energy Policy and Mines accepts Power Tarida, SL's withdrawal and closes file ALM-013.
This case clearly illustrates the real risk faced by energy promoters in protected areas: environmental processing can completely block a project, even after years of investment in permits and studies.
What does this resolution establish?
The resolution formalizes the acceptance of the withdrawal submitted by Power Tarida, SL in April 2026, ending the prior administrative authorization procedure for the Perdiguero energy storage plant.
The project had been requested in 2023 and contemplated:
- An energy storage plant with 100 MW installed capacity
- Location in the municipalities of Benasque and Sahún, Huesca province
- Evacuation infrastructure connected to the Eriste 220 kV substation of Red Eléctrica
The environmental assessment process was the determining factor in the blockade. The bodies that issued negative reports were:
- INAGA (Aragonese Institute of Environmental Management)
- General Directorate of Natural Environment of Aragón
- Ministry (unfavorable environmental impact declaration — final resolution)
With the unfavorable ministerial declaration, the promoter had no legal margin to continue. The access and connection permits to the transmission network had already expired in February 2026, even before the withdrawal was formalized in April. The resolution closes the file and releases the access capacity reserved at the Eriste 220 kV substation, which becomes available for other projects.
Economic and operational impact
For Power Tarida, SL, the cancellation means the loss of all investment made since 2023 in processing, environmental studies, engineering and permit management, without the project generating any return.
From a sector perspective, the most relevant effects are:
- Capacity released at Eriste 220 kV: the cancellation releases the access capacity that Power Tarida had reserved. Other promoters with projects in the queue could benefit from this release, although they will have to overcome the same environmental constraints of the area.
- Regulatory risk signal: a 100 MW project can be completely blocked through the environmental route, with no possibility of compensation or partial reformulation if the declaration is unfavorable.
- Area of high ecological sensitivity: Benasque and Sahún are located in the Aragonese Pyrenees, an area with strict environmental protections. Any promoter with assets or projects in similar areas must incorporate this risk into their viability analysis.
- Expiry of network permits: access and connection permits expired in February 2026, before the formal withdrawal. This shows that environmental processing can exceed the validity periods of network permits, creating a double blockade.
Who does it affect?
- Power Tarida, SL: directly affected promoter, with the project and associated investment cancelled.
- Energy storage promoters in Aragón and especially in the Pyrenees: must review the environmental risk of their projects in processing.
- Investors and funds with exposure to energy projects in protected areas: this case reinforces the need for exhaustive environmental due diligence before committing capital.
- Other promoters with access permits at the Eriste 220 kV substation: the release of capacity may open opportunities, although conditioned by the environmental context.
- Energy advisors and consultancies: must update their risk analyses for projects in areas of high ecological sensitivity in the Aragonese Pyrenees.
Practical example
An energy promoter submits in 2023 an authorization request for a 100 MW storage plant in Benasque (Huesca), connected to the Eriste 220 kV substation. It obtains access and connection permits to the transmission network and commissions environmental impact studies.
During processing, INAGA issues a negative report. The General Directorate of Natural Environment of Aragón does the same. Finally, the Ministry issues an unfavorable environmental impact declaration, which is binding and does not allow for ordinary appeal that would permit the project to continue.
In February 2026, the access and connection permits expire. In April 2026, the promoter submits withdrawal. In June 2026, the General Directorate of Energy Policy and Mines formally accepts the withdrawal, closes file ALM-013 and releases the capacity reserved at Eriste. The promoter has lost three years of processing and all investment in studies and management, without having been able to build a single meter of infrastructure.
What should companies do now?
- Review the environmental risk of projects in processing: if you have storage or generation projects in areas of the Aragonese Pyrenees or areas of high ecological sensitivity, request a preliminary environmental assessment before committing more investment.
- Verify the validity of access and connection permits: network permits have expiry periods. If environmental processing is prolonged, permits may expire before the project becomes viable. Monitor deadlines actively.
- Incorporate the environmental route as the main risk in viability analysis: an unfavorable environmental impact declaration closes the project with no possibility of continuation. This risk must be quantified in any financial model.
- Explore the capacity released at Eriste 220 kV: if you have projects in the area and meet environmental requirements, the release of access capacity may be an opportunity. Contact Red Eléctrica to learn about the current situation.
- Document and close files correctly: if your company is in a situation similar to Power Tarida, formalize the withdrawal as soon as possible to avoid additional administrative costs and free up resources.
Frequently asked questions
Why was the Perdiguero storage plant in Huesca cancelled?
The project received negative environmental reports from INAGA and the General Directorate of Natural Environment of Aragón, and culminated in an unfavorable environmental impact declaration from the Ministry. Faced with the objective impossibility of continuing, Power Tarida, SL submitted withdrawal in April 2026, which was formally accepted by Resolution of May 20, 2026.
What happens to the access capacity at the Eriste 220 kV substation after the cancellation?
The cancellation of file ALM-013 releases the access capacity that Power Tarida had reserved at the Eriste 220 kV substation of Red Eléctrica. That capacity becomes available for other projects that meet the applicable technical and environmental requirements.
When did the access and connection permits for the Perdiguero project expire?
The access and connection permits to the transmission network expired in February 2026, even before the promoter submitted the formal withdrawal in April 2026.
What is file ALM-013 and what does its closure imply?
ALM-013 is the administrative file code assigned to the Perdiguero storage plant project. Its definitive closure means that the prior administrative authorization procedure is archived with no possibility of reactivation under the same terms, and that the reserved network capacity is released.
What practical lesson does this case leave for promoters of energy projects in the Pyrenees?
This case demonstrates that an unfavorable environmental impact declaration blocks a project definitively, regardless of its size (100 MW) or the investment made. In areas of high ecological sensitivity such as Benasque and Sahún, environmental assessment must be the first viability filter, before committing capital to network permits or engineering.
Official source
Consult complete regulation in official source
Notice: This article is purely informational in nature 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-2026-13866