Hourly PV power time series from a 9 MW plant (Ukraine, Jan–Aug 2021)

This dataset contains an hourly time series of active power from a 9 MW ground-mounted PV plant in Ukraine covering 2021-01-01 to 2021-08-31. Columns: timestamp (ISO-8601, timezone: Europe/Kyiv); power_norm (active power normalized to P/Prated, Prated=9000 kW); split (train ≤ 2021-03-31 23:00; 2021-04-01 00:00 ≤ val ≤ 2021-07-01 23:00 ). The data support reproducibility for our study on exponential smoothing methods (SES, Holt, Holt–Winters, Modified SES) under a rolling one-step-ahead evaluation. Format: CSV (UTF-8, comma-delimited). Version: v1.0.