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ENTSO-E-Kategorien sind grob und sagen nichts ueber Anlagenalter, Wirkungsgrad oder Lifecycle-Systemgrenze; Faktoren mit einem caveat sind Naeherungen."},"error":null},"combined":{"available":true,"best_window_next_horizon":{"start":"2026-09-14T10:00:00Z","end":"2026-09-14T14:00:00Z","duration_hours":4,"score":0.0452,"average_price_value":0.1683,"average_co2_g_kwh":199.2,"method":"equal_weight_normalized_price_and_co2"}},"forecast_quality":{"available":true,"error":null,"price_window":{"window_hours":4,"price_basis":"base","evaluated_days":30,"exact_hit_days":17,"within_one_hour_days":28,"mean_extra_cost":0.00196,"mean_extra_cost_unit":"EUR/kWh","period_start":"2026-08-16","period_end":"2026-09-14"}},"hourly_accuracy":{"available":true,"error":null,"unit":"EUR/kWh","sample_count":720,"mean_abs_error":0.028796,"median_abs_error":0.025023,"p90_abs_error":0.052077,"within_primary_share":0.3736,"within_secondary_share":0.7806,"primary_threshold":0.02,"secondary_threshold":0.04,"pearson_r":0.9178,"period_start":"2026-08-15","period_end":"2026-09-14","computed_at":"2026-09-14T03:25:03.119246+00:00","detail":"Stuendliche Abweichung der eingefrorenen Prognose vom spaeter veroeffentlichten Day-Ahead-Preis."},"cheaper_day_decision":{"available":true,"error":null,"unit":"EUR/kWh","evaluated_pairs":13,"correct_day_count":12,"correct_day_share":0.9231,"ready":false,"minimum_ready_pairs":30,"mean_regret":0.002826,"near_optimal_share":0.9231,"comparison_horizon_hours":48,"window_hours":4,"period_start":"2026-08-31","period_end":"2026-09-12","computed_at":"2026-09-13T20:46:55.778835Z","detail":"Anteil der Tagespaare, an denen die Prognose auf den guenstigeren der beiden Tage gefuehrt hat, gemessen am guenstigsten Zeitfenster beider Tage."},"source":{"price":{"provider":"mixed","firestore":{"collection":"Entwicklerdaten","document":"StuendlicheVorhersage","updated_at":"2026-09-14T09:24:37.318Z"},"day_ahead":{"provider":"firestore-forecast-day-ahead","collection":"Entwicklerdaten","document":"StuendlicheVorhersage","updated_at":"2026-09-14T09:24:37.318Z","resolution":"PT1H"},"day_ahead_entries":13,"forecast_entries":35},"co2":{"provider":"firestore","collection":"Entwicklerdaten","document":"StuendlicheCO2Vorhersage","updated_at":"2026-09-13T23:16:27.764Z"}},"assumptions":null}