This work provides an overview and compares key operating characteristics of select energy storage technologies. This work explores how these storage technologies may be used to improve the flexibility and reliability of power systems given their technical characteristics. The report covers various electrochemical (lithium-ion, lead-acid, flow, sodium-sulfur), chemical (hydrogen), mechanical (pumped hydro storage, compressed air energy storage, flywheels, gravity) and electrical (supercapacitors) storage mediums.
Original languageAmerican English
Number of pages53
StatePublished - 2021

NREL Publication Number

  • NREL/TP-6A20-76097


  • energy storage
  • greening
  • Greening the Grid
  • grid integration
  • policy
  • regulation
  • USAID-NREL Partnership


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