Various energy storage technologies exist that cater to different needs regarding peak load regulation and frequency stabilization. Batteries, particularly lithium-ion systems, are among the most popular choices due to their efficiency, scalability, and rapid response capability. Battery Energy Storage Systems (BESS) are highly favored due to their quick response times. ings when the battery is used for the two indiv pplications, our results suggest that batteries ca s increase, storage systems are critical to the robustness, resiliency, and efficiency of energy systems. Firstly, the strategy involves constructing an optimization model incorporating load forecasting, capacity constraints, and. This work assesses the economic feasibilityof replacing conventional peak power plants,such as Diesel Generator Sets (DGS),by using distributed battery energy storage systems (BESS),to implement Energy Time Shift during peak hours for commercial consumers,whose energy prices vary as a function of. improve power system frequency regulation? This article proposes a novel capacity optimization configuration method of battery energy storage system (BESS) considering the rate characteristics in primary frequency regulation to improve the power system freq r systems including energy storage. By discharging stored energy during peak hours, they help reduce strain on the grid. This leads to: Over time, widespread ESS deployment can smooth out the peaks and valleys in energy demand, making the whole system more efficient. Renewables are clean but inconsistent.