Abstract: We consider using a battery storage system simultaneously for peak shaving and frequency regulation through a joint optimization framework, which captures battery degradation, operational constraints, and uncertainties in customer load and regulation . . Abstract: We consider using a battery storage system simultaneously for peak shaving and frequency regulation through a joint optimization framework, which captures battery degradation, operational constraints, and uncertainties in customer load and regulation . . To cope with this, the Swedish transmission system operator Svenska Kraftnät has introduced different frequency regulation (FR) markets. The FR markets are designed to rapidly handle sudden fluctuations between production and consumption in the grid. Meeting growing future flexibility needs with a changing energy mix will require supplementing hydro reservoirs with batteries or. . Frequency regulation and peak load sto power/energy ratio of approximately 1:1. Moreover, frequency regulation requires a fast response, high rate performance, and high power capability its of energy storage in industrial parks. In the proposed strategy, the profit a n is an important task in. . As the Nordic countries push forward with rapid electrification and record-breaking renewable energy development, a new structural necessity is emerging in the energy system: the ability to store and shift electricity over time.