Tartessos II Solar Plant Cancelled: What It Means for Photovoltaic Developers in Huelva

Key data

A photovoltaic plant of 60,569 MW disappears from the Andalusian energy map. Savanna Power Solar 10, SLU formally withdrew in September 2025 its request for construction authorization for the Ciudad de Tartessos II installation in Trigueros (Huelva), after ADIF warned that the 220 kV collector substation could be affected by the route of the future Seville-Huelva high-speed line. The General Directorate of Energy Policy and Mines accepted this withdrawal through resolution of August 5, 2026, published in the BOE on August 22, 2026.

The result is clear: the file is archived and the prior authorization granted in July 2023 becomes void. There is no possibility of recovering it. For the photovoltaic sector in western Andalusia, this case is a warning signal about the risks of collision between major transport infrastructure and renewable projects under processing.

What does this regulation establish?

The resolution reviews the complete sequence of the file and formalizes its closure. The key milestones are as follows:

The critical point is that the withdrawal of the construction request carries with it the prior authorization already granted. This is not a temporary suspension: the project is completely extinguished. To promote an installation at that location again, the developer would need to initiate a completely new procedure.

Economic and operational impact

The direct impact falls on Savanna Power Solar 10, SLU, which loses years of administrative processing and associated costs for studies, engineering, fees, and file management for a plant of 60,569 MW. An installation of this magnitude would have provided renewable energy equivalent to tens of thousands of households in western Andalusia.

Beyond the specific case, the sectoral impact is relevant for two reasons:

• Risk of regulatory collision: The Seville-Huelva high-speed rail corridor crosses an area with high density of photovoltaic projects under processing. Any developer with installations or evacuation infrastructure in that geographic area must verify compatibility with the rail route.
• Loss of prior authorizations: The resolution makes clear that withdrawal of the construction request implies loss of prior authorization. Developers forced to withdraw do not retain acquired rights over previous processing.

The ADIF report was decisive: once the final approval of the Seville-Huelva high-speed rail informative study (December 2024) confirmed the conflict, the developer had no room to reconsider the location of the collector substation and opted for withdrawal.

Who does it affect?

• Photovoltaic developers with projects in Huelva and its area of influence, especially in the future Seville-Huelva high-speed rail corridor.
• Investors and funds with participation in renewable projects in western Andalusia that have substations or evacuation infrastructure in areas potentially affected by new high-speed lines.
• Advisors and consultants for processing renewable energy projects who must review the compatibility of their files with rail routes under development.
• Engineering companies and solar park developers working in Huelva province or municipalities near the Seville-Huelva corridor.
• CFOs and operations directors of companies with renewable assets in the authorization phase in Andalusia who need to review their regulatory risk portfolio.

Practical example

A photovoltaic developer has a 50 MW plant in the construction authorization request phase in a Huelva municipality. Its collector substation is projected 2 km from the planned Seville-Huelva high-speed rail route. The high-speed rail informative study was finally approved in December 2024.

The Ciudad de Tartessos II case shows exactly what can happen: ADIF issues an incompatibility report during processing, the file becomes blocked, and if the developer cannot relocate the evacuation infrastructure, it is forced to withdraw. In doing so, it also loses the prior authorization already granted, with no possibility of recovery. The time and resources invested in processing—impact studies, administrative fees, engineering—are not recoverable.

The preventive action is clear: before requesting construction authorization, verify with ADIF the compatibility of all evacuation infrastructure with approved or informative study rail routes.

What should companies do now?

1. Review the portfolio of projects under processing in Huelva and Seville: Identify which installations or evacuation infrastructure are located in the area of influence of the Seville-Huelva high-speed rail corridor.
2. Request compatibility report from ADIF: Before submitting or continuing with the construction authorization request, obtain in writing ADIF's position on the compatibility of the collector substation and evacuation lines.
3. Evaluate alternatives for evacuation infrastructure routing: If there is risk of incompatibility, analyze whether it is technically and economically viable to relocate the substation or modify the route before the conflict becomes definitive.
4. Review the Seville-Huelva high-speed rail informative study (finally approved in December 2024): Compare the approved route with the exact location of your own assets to quantify the real risk.
5. Inform investors and partners about regulatory risk: If there are financing commitments or power purchase agreements (PPAs) linked to projects in the area, communicate the risk of cancellation before it materializes.

Official source

Consult complete regulation in 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-2026-18032