Energy storage systems (ESS) play a critical role in peak load management by storing excess electricity during periods of low demand or low-cost energy availability and then releasing it during peak demand periods to reduce the load on the power grid. Therefore, this paper proposes a coordinated variable-power control strategy for multiple battery energy storage stations (BESSs), improving the performance of peak shaving. Firstly, the strategy involves constructing an optimization model incorporating load forecasting, capacity constraints, and. They don't generate power, but they help balance it—especially when it comes to frequency regulation and peak load management. In this article, we explore what is peak shaving, how it works, its benefits, and intelligent battery energy storage systems.