RTE and Red Eléctrica to split 2027 FR-ES annual capacity auction into two separate auctions

RTE and Red Eléctrica announced that, for the 2027 delivery year, the annual cross-border capacity allocation at the France-Spain interconnection will again be split into two distinct auctions rather than a single annual auction, following a similar split successfully used in 2025.

Splitting the annual capacity auction changes the price formation and allocation timing for FR-ES cross-border capacity rights, affecting how traders and suppliers hedge cross-border exposure for the 2027 delivery year and continuing a precedent-setting deviation from single annual auction design at this border.

This event represents a continuation/repetition of a market design choice (split annual auction) at a specific interconnector, distinct from consolidated flow-based approaches being pursued on other French borders (e.g., FR-BE, FR-DE). The split auction approach segments long-term capacity allocation into two windows (September and December 2026) ahead of the 2027 delivery year, which could affect liquidity distribution across the two auction events, forward price signals, and the ability of market participants to fully hedge annual cross-border flows in a single transaction. Because this repeats a 2025 precedent, it suggests an emerging standard operating practice at the FR-ES border coordinated bilaterally between RTE and Red Eléctrica, distinct from other harmonization initiatives (e.g., flow-based methodologies) elsewhere in the French transmission system. The technical/methodological details of the second auction (December 2026) remain unpublished, indicating the design process is still being finalized in implementation details even as the overall split structure is confirmed.

EU cross-border capacity allocation framework (implied via JAO platform coordination); no specific regulation cited in source

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