Spain-France Biscay Gulf power interconnector reaches 70% completion

· Energy · Spain · France

The €3.1 billion Biscay Gulf electricity interconnector between Spain and France is 70% complete, according to a project update. Once finished, the link will raise cross-border exchange capacity between the two countries from 2.8 GW to 5 GW, strengthening the integration of the Iberian peninsula into the wider European grid. Additional interconnection is a long-standing EU priority because limited cross-border capacity constrains power trading and makes it harder to balance variable renewable output across regions. The project is one of several major European transmission links being built to support the energy transition and improve security of supply.

Why it matters：More cross-border capacity lets Europe move renewable power between regions and reduces the need for backup generation, so progress on this link is a marker for how fast grid integration is advancing.

Key points

  • The Biscay Gulf link costs €3.1 billion and is 70% complete
  • It will lift Spain-France exchange capacity from 2.8 GW to 5 GW
  • Interconnection is a priority for integrating Iberian renewables into the European grid

Sources (original reporting)

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