Judgment of the Court (Fifth Chamber) of 13 February 2025 – Swissgrid AG v European Commission

(Case C-121/23 P)  (1)

(Appeal - Internal market for electricity - Guideline on electricity balancing - Regulation (EU) 2017/2195 - Article 1(6) and (7) - Transmission system operators (TSOs) - Participation in European platforms for the exchange of standard products for balancing energy - Article 263 TFEU - Action for annulment - Admissibility - Concept of ‘challengeable act’ - Letter from the European Commission refusing the participation of a TSO operating in Switzerland in European platforms)

(C/2025/1862)

Language of the case: English

Parties

Appellant: Swissgrid AG (represented by: P. De Baere, P. L’Ecluse, V. Lefever and K. T’Syen, avocats)

Other party to the proceedings: European Commission (represented by: O. Beynet and B. De Meester, acting as Agents)

Operative part of the judgment

The Court:

1.	Sets aside the order of the General Court of the European Union of 21 December 2022, Swissgrid v Commission (T-127/21, EU:T:2022:868);

2.	Refers the case back to the General Court of the European Union;

3.	Reserves the costs.

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(1)   OJ C 127, 11.4.2023.