Energy storage system provides storage and output management for power generation side, and electrochemical energy storage technology and renewable energy generation technology form a joint system. With the good consistency of electric cells and the powerful calculation ability of the battery management system (BMS), Ningde Times helps the power generation side to restore the stability of the grid, optimize the output curve of power generation, reduce wind and light abandonment, provide system inertia and frequency regulation and peak regulation, increase the proportion of renewable energy generation and optimize the energy structure.