A typical industrial energy storage system consists of a battery system, PCS, BMS, EMS, STS (optional), MPPT (optional), control system, power distribution system, and fire protection system. . Battery storage in the power sector was the fastest growing energy technology commercially available in 2023 according to the IEA. Energy Digital has ranked 10 of the top. . While pumped hydroelectric storage dominates utility-scale applications (accounting for about 95% of all large-scale storage in the US), lithium-ion batteries have revolutionized residential and commercial options due to their versatility and declining costs. From lithium-ion batteries to pumped hydro, this article explores the most common energy storage equipment, their applications, and why they matter for businesses. . This article reviews various systems, such as lithium-ion batteries, flywheels, and thermal energy storage, highlighting their benefits and challenges with real-world case studies.