Energy-Arena: A Dynamic Benchmark for Operational Energy Forecasting. - Max Kleinebrahm; Jonathan Berrisch; Philipp Eiser; Wolf Fichtner; Veit Hagenmeyer; Matthias Hertel; Nils Koster; Sebastian Lerch; Ralf Mikut; Jan Priesmann; Melanie Schienle; Benjamin Schäfer 001; et al. (CoRR, 2026)