The dataset includes the renewable energy measurements, electricity prices, and load values collected from the field during the development of A Novel Multi‑Layer Energy Management System (EMS) for Enhanced Grid Services by a Hybrid Energy Storage System, along with the corresponding predictions for these variables. Through simulation, it also provides the 24‑hour power set‑point outputs of the EMS for the grid, the high‑energy battery, and the high‑power battery. In addition, it contains the cost of the electricity drawn from the grid over the 24‑hour period and the state‑of‑charge values of the batteries. All of these data are provided separately for both summer and winter scenarios.