Energy Storage
As America moves closer to a clean energy future, energy from intermittent sources like wind and solar must be stored for use when the wind isn''t blowing and the sun isn''t shining.
Solar and wind facilities use the energy stored in batteries to reduce power fluctuations and increase reliability to deliver on-demand power. Battery storage systems bank excess energy when demand is low and release it when demand is high, to ensure a steady supply of energy to millions of homes and businesses.
It captures energy in a physical form—typically as potential or kinetic energy—and releases it when needed. Pumped hydro storage, flywheels, and compressed air energy storage are the primary methods within this category, each suited to different applications and scales.
There are many sources of flexibility and grid services: energy storage is a particularly versatile one. Various types of energy storage technologies exist, addressing flexibility needs across different time scales. What are the benefits of storage? Storage shifts energy in time.
Unlike thermal generation, wind and solar are inherently variable, spatially distributed, and weather dependent. Their output fluctuates daily and seasonally, often peaking during periods of low demand.
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