Battery Energy Storage System

A battery energy storage system, or BESS, is a grouping of rechargeable batteries connected to the electric grid to store and release power on demand, converting the batteries direct current output to alternating current through inverters. It is the fastest responding dispatchable source of power on most grids, able to move from standby to full output in under a second, which lets it manage peak demand over roughly one to four hours, hold frequency steady, and damp the oscillations that can spread into wider blackouts. Global deployment has grown quickly, reaching about 267 gigawatts of power and 610 gigawatt hours of storage by 2025, with individual installations now approaching 4,000 megawatt hours, though still smaller than the largest pumped storage hydropower plants. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/