Joined Cases T-639/14 RENV II, T-352/15 RENV and T-740/17 RENV: Judgment of the General Court of 12 November 2025 – DEI v Commission (State aid – Electricity supply tariff – Conclusion of an arbitration agreement in order to fix the tariff – Decision to close the complaint – Decision finding no aid – Right to be heard – Advantage – Private investor test – Complex economic assessment)