Overview of energy storage technologies: thermal, mechanical, chemical, electrochemical, electrical, comparison and applications of ESS, national and international experience, Types and working principle of mechanical and thermal energy storage systems, applications of thermal energy storages, advances in thermal energy storages: sensible heat, latent heat and thermo-chemical energy storage systems, demand management for storage, Pumped hydro storage, national and international status, technology: fixed and variable, and innovative options for PSP development, Pumped hydro Potential assessment, investigations, and clearances, Financial, regulations and policy for pumped storage and battery storage, Electrochemical ESS (batteries): theory, types, characteristics, modeling, design and sizing, batteries safety, cell balancing circuits, charging techniques, state of charge and health estimation techniques, thermal management, battery pack design and management, ESS design and sizing, hybrid energy storage systems, integration with renewables, case studies, ESS installation and role in an isolated and grid connected power system with renewable energy sources, short-term and long-term applications of ESS; case studies, Environmental impacts and mitigations for energy storage projects.