Environmental Law · Sub-area
Renewable Energy Authorisation in Spain
EIA, grid access and connection, MITECO milestones (5, 8 and 10) and technology-specific issues. An access permit lost through a missed milestone can mean years of delay and millions of euros in losses for the project.
The renewable authorisation procedure
Developing a renewable energy project in Spain involves a sequence of authorisations that may overlap in time but have critical dependencies on each other. The order and the deadlines determine the project's viability.
EIA / DIA
Law 21/2013
Planning authorisation
Region / Municipality
Prior administrative authorisation (AAP)
MITECO / Region
Grid access and connection
REE / Distributor · RD 1183/2020
Construction authorisation
MITECO / Region
Operating authorisation
Commissioning
RD 1183/2020 · Critical for the project
The MITECO milestones: 5, 8 and 10
Milestones are progress accreditations that the developer must submit to the grid operator to keep access and connection permits valid. Missing one results in automatic lapse of the permit.
EIA request initiated
The developer must prove to the grid operator that it has filed the request to start the environmental impact assessment with the competent environmental authority.
Deadline
18 months from the access grant decision
DIA obtained or environmental procedure concluded
The developer must prove that the environmental assessment procedure has concluded with the Environmental Impact Statement (DIA) or equivalent environmental report.
Deadline
Variable depending on the access grant decision and regulatory amendments
Commissioning
The developer must prove that the installation has been commissioned and registered. This is the milestone that closes the procedure and definitively consolidates the grid access right.
Deadline
Set individually in the access grant decision
RD 1183/2020 · CNMC Circular 5/2019
Grid access and connection
Transmission grid vs. distribution grid
The transmission grid (voltage ≥ 220 kV) is managed by REE (Red de Transporte). The distribution grid (<220 kV) is managed by zonal distributors (Endesa, Iberdrola, Naturgy, E-Redes, etc.). The connection point determines who grants the permits and which regulations apply.
Application process: access first, then connection
The process begins with the access permit application to the grid operator. Once access is obtained, the connection permit is requested, which sets the technical and economic conditions. Both permits are governed by RD 1183/2020 and CNMC Circular 5/2019.
Node saturation and available capacity
The grid is organised into nodes with limited access capacity. Many nodes in the peninsular system are saturated or have conditioned capacity. Obtaining an access permit at a node with available capacity is today the main bottleneck for renewable project development in Spain.
Technology-specific issues
Technology-specific considerations
PV
Solar photovoltaic
- Land classification: special authorisation required on rural or non-developable land in most regions
- Ordinary EIA (Annex I) required above 150 MW installed capacity or 500 ha of surface area
- Agrivoltaics: compatibility with agricultural use regulated inconsistently across regions
- Collective self-consumption and energy communities: specific regime under RD 244/2019
- Connection to the distribution grid common in projects under 50 MW
Wind
Wind
- Impact on fauna: mandatory assessment of effects on birds and bats throughout the project's life cycle
- Incompatibility with SPAs (Special Protection Areas for Birds) and critical species areas
- Natura 2000 Network: significant-effects assessment required even if the project is outside the site
- Noise: compliance with regional and municipal regulations, with an independent acoustic assessment
- Cultural heritage and intervisibility: frequent constraints in inland areas with listed heritage
BESS
Storage (BESS)
- Regulatory framework still developing: no complete specific regulation exists for standalone storage systems
- Classification as a generation or storage installation, with different implications for grid access
- Own milestones under RD 1183/2020 for BESS, distinct from those for generation
- Possibility of siting behind the installation owner's meter (behind-the-meter) without an access permit
- Participation in system balancing service markets (MADES): framework evolving under the CNMC
HYB
Hybridisation
- Combining technologies — PV + BESS, wind + PV — at the same grid connection point
- Allows optimising the use of already-granted access capacity without requesting new access permits
- Requires notification to or modification with the grid operator depending on the resulting change in capacity
- Hybridisation capacity may not exceed the access capacity granted under the original permit
- CNMC Circular 5/2019 and RD 1183/2020 govern hybridisation conditions at the connection point
Frequently asked questions about renewable energy authorisation
What authorisations does a renewable energy project need in Spain?
A renewable energy project requires: (1) Environmental Impact Statement under Law 21/2013; (2) planning authorisation from the region or municipality; (3) prior administrative authorisation (AAP) from MITECO or the region depending on capacity; (4) grid access and connection permits granted by the grid operator; (5) construction authorisation; and (6) operating authorisation or commissioning certificate.
What are the MITECO milestones and what happens if they are not met?
Milestones are progress accreditations that developers must submit within set deadlines to keep their grid access and connection permits valid. The most critical are: milestone 5 (EIA request filed), milestone 8 (DIA obtained) and milestone 10 (commissioning). Missing any of them results in automatic lapse of the access permit, forcing the developer to restart the procedure from scratch.
What is the difference between the access permit and the grid connection permit?
The access permit recognises the right to feed energy into the grid at a given point and capacity. The connection permit governs the technical and economic conditions of the physical connection. Both are processed sequentially under RD 1183/2020. The access permit is the hardest to obtain due to capacity saturation at many nodes: losing it through missed milestones has very serious economic consequences.
Can a solar farm be installed on rural land in Spain?
In most regions, yes, but it requires special authorisation on public or social interest grounds processed before the competent regional department. Some regional renewable energy master plans enable specific land categories. Compatibility with agricultural uses (agrivoltaics) is being regulated inconsistently across regions. The land's planning classification must be analysed from the project's earliest stages.