The topic of greenhouse gas (GHG) emissions accounting for battery energy storage systems (BESS) is relatively new and so has not yet been thoroughly addressed by existing organization-level GHG emissions reporting guidance. This EPRI Technical Brief provides an overview of beneficial applications for integrating BESS into the electric power grid, the life-cycle GHG emissions of BESS, and how these emissions may be accounted for in electric company GHG emissions inventories.