Energy storage systems (ESS) exist in a wide variety of sizes, shapes and technologies. the fundamental energy storage mechanism, naturally affects its important characteristics including cost. Energy storage can not only reduce peak loads and fill valleys, improve the efficiency of electric energy utilization, but also improve the ability to absorb new energy, promote power grid frequency regulation and peak load regulation, and even participate in power market transactions, providing. Electrochemical: Storage of electricity in batteries or supercapacitors utilizing various materials for anode, cathode, electrode and electrolyte. Mechanical: Direct storage of potential or kinetic energy. While lithium-ion batteries —especially LFP (LiFePO₄)—are the backbone of most modern systems, grid energy storage also encompasses: Modern deployments often use hybrid solutions, depending on site conditions and service requirements. Decarbonization is a crucial step towards a sustainable future, and renewable energy plays a vital role in making this transition. Energy management systems (EMSs) are required to utilize energy storage effectively and safely as a flexible grid asset that can provide multiple grid services.