Energy storage is the capturing and holding of energy in reserve for later use. Energy storage solutions for electricity generation include pumped-hydro storage, batteries, flywheels, compressed-air energy storage, hydrogen storage and thermal energy storage components. The ability to store energy. As the global energy demand grows and the push for renewable sources intensifies, energy storage systems (ESS) have become crucial in balancing supply and demand, enhancing energy security, and increasing the efficiency of power systems. As renewable energy adoption surges (global market projected to reach $1. 3 trillion by 2030 ), the.