BESS Lagerung 101.8 MW Plant in Girona: Authorization and Key Insights for the Energy Sector

Key data

A Green Message, SL has received the green light for the BESS Lagerung energy storage plant of 101.8 MW in the municipalities of Sant Julià de Ramis and Vilademuls (Girona). The Resolution of May 20, 2026 from the General Directorate of Energy Policy and Mines formalizes the prior administrative authorization, the first mandatory milestone in the process of enabling such an installation in Spain.

The processing has been carried out in accordance with Royal Decree 1955/2000 and Law 21/2013 on environmental assessment. The project passed the simplified environmental impact assessment with a favorable report, which avoided the need for an ordinary assessment procedure, although it remains subject to specific environmental conditions that must be met before the next phase.

What does this regulation establish?

The resolution grants prior administrative authorization to A Green Message, SL for the BESS Lagerung plant. This authorization does not yet enable construction: it is the first formal step in a multi-phase process regulated by RD 1955/2000.

The key technical and regulatory elements established by the resolution are:

The plant is part of a broader energy hub at the La Farga 220 kV substation, which groups several generation and storage installations in the Gironès region. The joint evacuation model—sharing the Profar 30/220 kV collector substation with other renewable plants—is a differentiating element that optimizes the necessary grid infrastructure.

Economic and operational impact

For the promoter, this prior authorization unlocks the project development phase, but does not eliminate relevant economic and operational obligations before construction can begin:

• Budget for corrective measures: the promoter must quantify and budget the environmental corrective measures required as a prerequisite for construction authorization. This cost is not fixed in the resolution and will depend on the scope of specific environmental conditions.
• Forestry authorizations: obtaining forestry permits is an explicit prior requirement. Forestry processing timelines can be a critical factor in the project schedule.
• Joint evacuation agreement: already signed in May 2025, which reduces uncertainty about grid infrastructure. Shared use of the Profar 30/220 kV substation with other plants implies coordination with other promoters.
• Positioning in the La Farga hub: integration into this energy hub can generate infrastructure synergies, but also implies operational dependencies with the rest of the cluster installations.

From a market perspective, a 101.8 MW BESS plant is a significant-scale installation in the Spanish context, with capacity to participate in electrical system adjustment services and capacity markets.

Who does it affect?

• A Green Message, SL: direct promoter and authorization holder. Must manage all conditions prior to construction authorization.
• Municipalities of Sant Julià de Ramis and Vilademuls (Girona): affected by the physical implementation of the installation and its evacuation infrastructure.
• Other promoters of the La Farga 220 kV hub: share evacuation infrastructure through the Profar 30/220 kV collector substation under the joint evacuation agreement.
• BESS project promoters in Spain: this resolution is a relevant precedent on the use of simplified environmental assessment for storage installations of this scale.
• Advisors and consultants in the energy sector: need to understand the procedural framework applied (RD 1955/2000 + Law 21/2013) and typical conditions in similar projects.

Practical example

A Green Message, SL has obtained prior administrative authorization for BESS Lagerung, but its roadmap to construction includes mandatory steps with direct impact on the project schedule and budget:

1. Environmental conditions: the favorable report from the simplified assessment comes with specific conditions that must be integrated into the construction project. Without documented compliance, construction authorization cannot be requested.
2. Forestry authorizations: if any of the 30 kV underground lines or the plant itself affects forestland in Sant Julià de Ramis or Vilademuls, processing with the Catalan forestry administration could add weeks or months to the schedule.
3. Budget for corrective measures: must be prepared and submitted before construction authorization. This document sets the cost of environmental restoration and correction actions committed.

In summary: prior authorization is the starting point, not the endpoint. The promoter has technical, environmental, and administrative work ahead before construction can begin.

What should companies do now?

1. If you are A Green Message, SL: identify and document all specific environmental conditions from the favorable report. Establish an action plan with responsible parties and deadlines for each before requesting construction authorization.
2. Process forestry authorizations immediately: they are a common bottleneck in projects of this type. Start the application with the competent forestry administration in Catalonia in parallel with other management tasks.
3. Prepare the budget for corrective measures: commission a specialized technical team to quantify the required corrective measures. This document is an explicit prerequisite for the next phase.
4. Coordinate with other La Farga hub promoters: the joint evacuation agreement signed in May 2025 implies operational coordination obligations. Review the agreement terms and ensure schedule alignment.
5. If you are a promoter of another BESS project in Spain: analyze this resolution as a procedural reference. The simplified environmental assessment route with favorable report may be applicable to similar projects, reducing timelines compared to the ordinary procedure.

Official source

View complete regulation at official source

Disclaimer: 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-2026-13198