At its core, a battery stores electrical energy in the form of chemical energy, which can be released on demand as electricity. Depending on the extent to which it is deployed, electricity storage could help the utility grid operate more efficiently, reduce the likelihood of brownouts during peak demand, and allow for more renewable resources to be built and used. Energy can be stored in a variety of ways, including: Pumped. An energy storage system (ESS) for electricity generation uses electricity (or some other energy source, such as solar-thermal energy) to charge an energy storage system or device, which is discharged to supply (generate) electricity when needed at desired levels and quality. The ability to store energy can facilitate the integration of clean energy and renewable energy into power. Increased generation of renewable electricity from intermittent sources is needed to support decarbonization of energy systems, but balancing the electricity grid is challenging.
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