Key data
| Regulation | Resolution of June 17, 2026, from the General Directorate of Energy Policy and Mines |
|---|---|
| Publication | July 1, 2026 |
| Entry into force | July 1, 2026 |
| Developer | Arena Power Ren 29, SL |
| Project | PB Babor 7 — stand-alone energy storage |
| Installed capacity | 66 MW |
| Location | Tarifa (Cádiz) |
| Evacuation voltage | 30 kV (underground line) to step-up substation |
| Grid connection point | Puerto de la Cruz 220 kV Substation (REE) |
| Environmental report | Favorable, October 2025 (without ordinary evaluation) |
| Coordination agreement | Signed in November 2025 with other developers |
| Category | Energy |
| Year | 2026 |
Arena Power Ren 29, SL has received state approval to build one of the most relevant stand-alone energy storage plants in southern Spain. The Resolution of June 17, 2026 from the General Directorate of Energy Policy and Mines, published in the BOE on July 1, 2026, grants prior administrative authorization to the PB Babor 7 project: 66 MW of installed capacity in Tarifa (Cádiz), with its own evacuation infrastructure and connection to REE's transmission network.
This authorization is not the final construction permit, but it is the essential prior step: without it, no construction work or grid access contracting can begin. Its granting activates specific obligations that the developer must fulfill before laying the first stone.
What does this regulation establish?
The resolution grants prior administrative authorization for the stand-alone energy storage project "PB Babor 7", which includes both the storage installation and its evacuation infrastructure. The approved technical elements and conditions are as follows:
| Element | Detail |
|---|---|
| Type of installation | Stand-alone energy storage (without associated generation) |
| Installed capacity | 66 MW |
| Location | Tarifa, province of Cádiz |
| Evacuation infrastructure | 30 kV underground line to step-up substation |
| Grid transmission connection point | Puerto de la Cruz 220 kV Substation (Red Eléctrica de España) |
| Environmental impact assessment | Favorable report in October 2025; did not require ordinary evaluation |
| Environmental conditions | Fire protection self-protection plan + flood risk study |
| Shared infrastructure | Yes, with other developers under coordination agreement (November 2025) |
| Grid access and connection conditions | Already obtained previously by the developer |
A relevant aspect is that the installation shares evacuation infrastructure with other developers. This means that any change in the construction schedule or technical conditions of one developer can affect the rest. The coordination agreement signed in November 2025 regulates this coexistence, but generates operational interdependencies that must be actively managed.
Before construction begins, the developer must integrate all environmental requirements derived from the favorable report into the project: specifically, the fire protection self-protection plan and the flood risk study. These are not recommendations: they are sine qua non conditions to advance to the next administrative step.
Economic and operational impact
Prior administrative authorization is the first formal milestone in the chain of permits for a storage project. For Arena Power Ren 29, SL, its obtaining unlocks the possibility of advancing toward administrative construction authorization and, subsequently, commissioning.
From an operational perspective, the most relevant impacts are:
- Obligation to integrate environmental conditions before construction begins: the fire protection self-protection plan and flood risk study must be incorporated into the executive project. Their absence blocks administrative progress.
- Management of shared infrastructure: the 30 kV underground line and step-up substation are resources shared with other developers. Any delay or modification by one impacts the others. The coordination agreement of November 2025 is the legal framework that regulates this relationship.
- Grid access conditions already obtained: the developer already has access and connection permits to REE's Puerto de la Cruz 220 kV substation, which eliminates one of the usual bottlenecks in projects of this nature.
- Risk of authorization expiration: prior administrative authorizations have validity periods. If the developer does not advance in the following procedures within regulatory timeframes, the authorization may become void.
Who does it affect?
- Arena Power Ren 29, SL: direct developer of the PB Babor 7 project. Must comply with all authorization conditions before starting construction.
- Other developers with shared evacuation infrastructure in Tarifa: those who signed the coordination agreement of November 2025 and share the 30 kV line and step-up substation.
- Red Eléctrica de España (REE): manager of the Puerto de la Cruz 220 kV substation, the connection point to the transmission network.
- Consulting firms and engineering companies: working on drafting the fire protection self-protection plan or the flood risk study required as an environmental condition.
- Project investors and financiers: obtaining this authorization is a common contractual milestone in financing agreements for renewable and storage projects.
Practical example
A developer sharing evacuation infrastructure with Arena Power Ren 29, SL under the coordination agreement of November 2025 should now review whether the progress of the PB Babor 7 project affects their own construction schedule. If the 30 kV underground line is built in a certain phase, developers depending on that same infrastructure will not be able to connect their installations until it is operational.
For example: if a second developer plans to start evacuating their own plant in the first quarter of 2027 and the shared line is not ready due to delays in PB Babor 7, their commissioning schedule will be directly compromised. The coordination agreement must foresee these scenarios and establish conflict resolution mechanisms between developers.
For Arena Power Ren 29, SL, the immediate next step is to commission the fire protection self-protection plan and flood risk study and incorporate them into the project before requesting construction authorization. Without these documents, the administrative file cannot advance.
What should companies do now?
- Arena Power Ren 29, SL — Immediately commission the fire protection self-protection plan and flood risk study: these are prior conditions to construction start imposed by the environmental report of October 2025. Without them, construction authorization cannot be requested.
- Arena Power Ren 29, SL — Review the processing schedule: prior administrative authorization has validity periods. Identify when it expires and plan the following milestones (construction authorization, commissioning record) to avoid expiration.
- Developers with shared infrastructure — Review the coordination agreement of November 2025: check how the progress of PB Babor 7 affects your own construction schedules and grid connection. Activate the coordination mechanisms provided for in the agreement if there is risk of schedule conflict.
- Investors and project financiers — Update the project status in monitoring reports: obtaining prior authorization is a relevant contractual milestone. Verify if it activates any disbursement condition or reporting in financing agreements.
- All affected parties — Consult the complete resolution in the BOE: the Resolution BOE-A-2026-14321 contains the complete technical and environmental conditions. Any non-compliance may result in revocation of the authorization.
Frequently asked questions
What is prior administrative authorization for energy storage?
It is the first formal permit that the State grants for an energy storage project. Without it, construction procedures or final grid access contracting cannot begin. In this case, the General Directorate of Energy Policy and Mines has granted it to Arena Power Ren 29, SL for the PB Babor 7 project of 66 MW in Tarifa (Cádiz), effective July 1, 2026.
What environmental conditions must the PB Babor 7 project comply with before starting construction?
The favorable environmental impact report issued in October 2025 imposes two specific conditions: the preparation of a fire protection self-protection plan and a flood risk study. Both must be integrated into the executive project before construction begins. The report did not require ordinary environmental impact assessment.
How does the coordination agreement of November 2025 affect other developers in Tarifa?
The coordination agreement signed in November 2025 regulates the shared use of evacuation infrastructure (30 kV underground line and step-up substation) between Arena Power Ren 29, SL and other developers. Any delay or modification in the PB Babor 7 schedule can directly affect the connection timelines of other projects that depend on that same infrastructure.
Where does the PB Babor 7 project connect to the transmission network?
Evacuation is carried out via 30 kV underground line to its own step-up substation, from which it connects to REE's transmission network at the Puerto de la Cruz 220 kV substation. The access and connection conditions to this substation had already been obtained previously by the developer.
What happens if Arena Power Ren 29 does not comply with the authorization conditions?
Non-compliance with the conditions imposed in the resolution — especially those of an environmental nature — may result in revocation of prior administrative authorization. Additionally, if the developer does not advance in the following procedures within regulatory timeframes, the authorization may become void due to expiration. The complete resolution with conditions is available in BOE-A-2026-14321.
Official source
Consult complete regulation at 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-2026-14321