1. Short title This Act may be cited as the Reducing the Cost of Energy Storage Act of 2017 . 2. Definitions In this Act: (1) DER (A) In general The term DER means an electric device that can produce or consume energy that is located— (i) on the distribution system or any subsystem of the distribution system; or (ii) behind a customer meter. (B) Inclusions The term DER includes— (i) an energy storage resource; (ii) an energy generation technology; (iii) a demand response resource; (iv) an energy efficiency resource; (v) an electric vehicle and associated supply equipment and systems; and (vi) aggregations and integrated control systems, including virtual power plants, microgrids, and networks of microgrid cells. (2) Electric consumer; State regulatory authority The terms electric consumer and State regulatory authority have the meanings given the terms in section 3 of the Public Utility Regulatory Policies Act of 1978 ( 16 U.S.C. 2602 ). (3) Energy storage The term energy storage means equipment or facilities capable of absorbing energy, storing energy for a period of time, and dispatching the stored energy, that— (A) uses mechanical, electrochemical, hydroelectric, or thermal processes, as a single facility or as an aggregation of units, throughout the electric grid, including behind the meter to store energy generated at 1 time for use at a later time; (B) uses mechanical, electrochemical, hydroelectric, or thermal processes, as a single facility or as an aggregation of units, throughout the electric grid, including behind the meter to store energy generated from mechanical processes that would otherwise be wasted for delivery at a later time