22/09/2025 (Agence Europe) – In an opinion published on 18 September, the Agency for the Cooperation of Energy Regulators (ACER) highlighted weaknesses in the study on the bidding zones of European transmission system operators (TSOs) published on 28 April (see EUROPE B13629A10). According to the Agency, the coordination of TSOs in Central Europe in resolving congestion is overestimated, which minimises the efficiency gains associated with certain reconfigurations, such as the...