This technical brief is a summary of EPRI’s Energy Systems and Climate Analysis (ESCA) research on the economics of electricity storage technologies, including work in progress. Web links are included where available. Publications marked with an * are available to the public free of charge or are published in academic journals. Other publications are available to EPRI member companies that fund certain program(s), as indicated with a number in brackets preceding the publication title, and can be purchased by members of the public who may be interested in doing so, subject to EPRI’s product distribution requirements. For a full listing of ESCA research that is free to the public, please visit the ESCA public website at https://eea.epri.com/research.html. To receive the ESCA group’s quarterly newsletter with research updates, please email your request to eea@epri.com.