To enhance peak-shaving and valley-filling performance in residential microgrids while reducing the costs associated with energy storage systems, this paper selects retired power batteries as the storage solution, breaking through existing optimization models. Since 2015, we have successfully completed 320+ projects across Europe with total capacity exceeding 85MW. Can load peak shaving and valley. Can load peak shaving and valley filling reduce PVD? The function of load peak shaving and valley filling is achieved, thus ensuring the safe and orderly operation of the rural power grid. The feasibility of the strategy is verified through simulation results on multiple scenarios, for the. Among the most effective strategies are peak shaving, valley filling, and energy-saving cost reduction. This article explains how these techniques work and how C& I energy storage systems (ESS) help.