1. Short title This Act may be cited as the Better Energy Storage Technology Act or the BEST Act . 2. Grid-scale energy storage system research, development, and demonstration program (a) In general The United States Energy Storage Competitiveness Act of 2007 ( 42 U.S.C. 17231 ) is amended— (1) by redesignating subsections (l) through (p) as subsections (m) through (q), respectively; and (2) by inserting after subsection (k) the following: (l) Grid-Scale energy storage system research, development, and demonstration program (1) Definitions In this subsection: (A) Energy storage system The term energy storage system means a system, equipment, facility, or technology that— (i) is capable of absorbing energy, storing that energy for a period of time, and dispatching the stored energy; and (ii) (I) uses a mechanical, electrical, chemical, electrochemical, or thermal process to store energy that— (aa) was generated at an earlier time for use at a later time; or (bb) was generated from a mechanical process, and would otherwise be wasted, for delivery at a later time