Spain opens 11 GW of grid access at just transition nodes

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Grid access has become the binding constraint for renewable projects in Spain long before price does, so where the transmission system frees up capacity matters as much as any tariff. On 23 September 2026 the Ministry for the Ecological Transition and the Demographic Challenge put a large block of that capacity on the table, launching the instruments to grant up to 11 GW of access at nodes located in just transition zones. A public consultation on the design runs until 8 October 2026.

The capacity sits at 13 grid nodes across five autonomous communities, in Asturias, Castilla y León, Galicia, Andalucía and Castilla-La Mancha. These are nodes in areas where coal and other conventional generation has closed or is closing, and the access they leave behind is being redirected to new projects rather than left idle. For a developer, an IPP or an asset manager looking at wind, solar or storage in these regions, the point is simple. Access that would otherwise take years to secure through the standard queue is being opened at defined points on the network, on a defined timetable.

MITECO has set out two routes. Eleven of the nodes are allocated through a simple concurrence procedure, where requests are taken in order of application rather than ranked competitively. These are Carrio, Compostilla, Garoña, La Robla, Lada, Litoral, Montearenas, Pinar del Rey, Puentes de García Rodríguez, Puertollano and Soto de Ribera, at 220 kV and 400 kV. The remaining two nodes, Guardo at 220 kV and Velilla at 400 kV, are allocated by competitive auction, where the interest identified so far is associated mainly with reversible pumped hydro. The distinction is worth reading carefully. Order of application rewards readiness, so at the eleven concurrence nodes the projects that can file a complete request first are the ones that secure the capacity.

Eligibility carries a condition that does not appear in an ordinary access request. Beneficiaries have to take on socioeconomic commitments for the just transition zone the node sits in, and comply with the environmental evaluation requirements that apply. In other words the capacity is not offered on price or readiness alone. It is tied to what a project brings to the area it connects in, which is a factor to weigh into any siting decision at these nodes.

At consultation stage the design can still move, so the final procedure, the exact conditions and the split of the 11 GW across the nodes are the numbers to confirm once MITECO publishes the definitive instruments. What is already clear is the direction. Spain is treating the grid capacity released by the energy transition as a resource to be allocated deliberately, and the window to shape the rules closes on 8 October.

Synertics tracks grid access, auction and revenue signals like this one across the ENTSO-E markets through SEMT, which brings market intelligence, PPA origination and revenue monitoring together in one place for operators, IPPs and asset managers. If you are weighing a position at one of these nodes and want to see how it reads against the wider market, you can request access at https://synertics.io/signup/ or reach us at info@synertics.io.