Key data
| Regulation | Resolution of June 25, 2026, from the General Directorate of Energy Policy and Mines |
|---|---|
| Publication | July 16, 2026 |
| Entry into force | July 16, 2026 |
| Promoter | Artemisa Energía, SL |
| Authorized project | Battery storage module «Artemisa», 39.6 MW |
| Associated solar plant | Photovoltaic park «Artemisa», 46.2 MW (existing) |
| Location | Alcalá de Guadaíra (Seville) |
| Enabling regulatory framework | Royal Decree 997/2025 |
| Category | Energy / Renewable storage |
| Year | 2026 |
The energy storage sector has just received a clear signal: the General Directorate of Energy Policy and Mines has granted Artemisa Energía, SL prior administrative authorization and construction administrative authorization for a battery storage module of 39.6 MW in Alcalá de Guadaíra (Seville). The project will be hybridized with the existing photovoltaic park «Artemisa», of 46.2 MW, already in operation at the same site.
The resolution, published in the BOE on July 16, 2026, is one of the first cases resolved under the Royal Decree 997/2025, which opens an accelerated pathway for storage hybridization with existing renewable plants. For the sector, the message is twofold: the regulatory framework works and timelines are shortened.
What does this regulation establish?
The resolution grants two simultaneous authorizations to Artemisa Energía, SL:
- Prior administrative authorization: recognizes the viability of the project and its fit within energy planning.
- Construction administrative authorization: enables the start of construction of the battery module and its evacuation infrastructure.
The authorized technical elements are as follows:
| Element | Detail |
|---|---|
| Storage module | «Artemisa» batteries, 39.6 MW installed power |
| Associated solar plant | Photovoltaic park «Artemisa», 46.2 MW (already existing) |
| Evacuation infrastructure | Underground line at 30 kV to a sectioning center |
| Grid connection | Don Rodrigo 400 kV substation of REE (using existing network) |
| Location | Alcalá de Guadaíra (Seville) |
The project was initially processed jointly with three other similar projects and subsequently was separated for individual resolution, which allowed accelerating the resolution of each case separately.
Key aspect of the regulatory framework: RD 997/2025 allows storage hybridization projects with existing renewable plants to benefit from:
- Exemption from environmental impact assessment (by using already authorized infrastructure).
- Reduced processing timelines compared to the ordinary procedure.
All administrations consulted during processing gave express or tacit approval, and the promoter accredited regulatory compliance through responsible declarations.
Economic and operational impact
For Artemisa Energía, SL, the authorization means being able to add storage capacity to an already operating solar park, which has direct consequences on the bottom line:
- Greater dispatch flexibility: the battery allows storing solar energy during low demand hours and selling it during peak hours, improving the average selling price.
- Use of existing infrastructure: the connection to the Don Rodrigo 400 kV REE substation was already available, which significantly reduces investment in evacuation.
- Processing savings: the exemption from environmental assessment and the reduced timelines of RD 997/2025 cut costs and time to market.
For the sector as a whole, this resolution confirms that RD 997/2025 is a real and operational instrument. Promoters with existing solar plants considering adding storage now have a concrete precedent on how the procedure works.
Who does it affect?
- Artemisa Energía, SL: promoter directly authorized to build the «Artemisa» battery module of 39.6 MW.
- Promoters of existing photovoltaic solar plants studying the addition of battery storage in hybridization regime.
- Investors and energy infrastructure funds with positions in solar assets in Spain.
- Consultants and advisors for renewable projects processing authorizations under RD 997/2025.
- Network managers (REE) and substation operators affected by new storage connections.
- Battery system manufacturers and integrators operating in the Spanish market.
Practical example
A promoter with a photovoltaic solar park of 46 MW already in operation in Andalusia wants to add a storage battery to improve its position in the wholesale market. Following the model of the «Artemisa» case:
- Requests processing under RD 997/2025, avoiding ordinary environmental impact assessment.
- Designs the evacuation infrastructure through an underground line at 30 kV to a sectioning center, connecting to the REE substation already used by the solar park.
- Accredits regulatory compliance through responsible declarations to the consulted administrations.
- Obtains prior administrative and construction authorization in a single case, with reduced timelines.
The result: an operational storage battery that allows selling energy in the time slots with the highest prices, with more agile processing and without the need for new high-voltage evacuation infrastructure.
What should companies do now?
- Review if your existing solar plant is a candidate for hybridization: RD 997/2025 opens this pathway for already authorized photovoltaic parks. Check if your installation meets connection and capacity requirements.
- Analyze available evacuation infrastructure: as in the «Artemisa» case, using the existing connection to REE substations reduces costs and simplifies processing.
- Start the authorization process under RD 997/2025: request prior administrative and construction authorization jointly, accrediting compliance through responsible declarations.
- Coordinate with the consulted administrations: ensure obtaining express approval or manage timelines for tacit approval, as was done in this case.
- Evaluate joint or individual processing: this case was initially processed jointly with three other similar projects and was separated for individual resolution. Evaluate which strategy is more efficient for your project portfolio.
Frequently asked questions
What is solar-battery hybridization and what advantages does it have for a promoter?
Hybridization consists of adding a battery storage module to an already existing photovoltaic solar park, using the same evacuation infrastructure. In the «Artemisa» case, the 39.6 MW battery is hybridized with the 46.2 MW solar park already operating in Alcalá de Guadaíra. The main advantage is that it allows storing energy during low demand hours and selling it during peak hours, improving the average selling price without the need for new high-voltage infrastructure.
What does RD 997/2025 allow for storage projects in hybridization?
Royal Decree 997/2025 enables an accelerated pathway for storage hybridization projects with existing renewable plants. Its main advantages are: exemption from environmental impact assessment (by using already authorized infrastructure) and reduced processing timelines compared to the ordinary procedure. The «Artemisa» case is one of the first resolved under this framework.
What is the evacuation infrastructure of the «Artemisa» project like?
The evacuation infrastructure includes an underground line at 30 kV that connects the battery module with a sectioning center, using the existing network to the Don Rodrigo REE substation, which operates at 400 kV. This use of existing infrastructure is key to reducing costs and simplifying processing.
How was the case processed and why was it separated?
The Artemisa Energía case was initially processed jointly with three other similar projects. Subsequently it was separated to allow individual resolution of each one, which accelerated the process. All consulted administrations gave express or tacit approval, and the promoter accredited regulatory compliance through responsible declarations.
When does the authorization enter into force and what steps follow next?
The resolution was published and entered into force on July 16, 2026. From this date, Artemisa Energía, SL can begin construction of the «Artemisa» battery module of 39.6 MW. The next milestone will be obtaining the operating authorization once construction is completed and regulatory inspections are passed.
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-2026-15557