; and (ii) establish cost subtargets for technologies and applications relating to the energy storage systems described in paragraph (4), taking into consideration— (I) electricity market prices; and (II) the goal of being cost-competitive in specific markets for electric grid products and services. (6) Demonstration projects (A) In general Not later than September 30, 2023, under the program, the Secretary shall, to the maximum extent practicable, enter into agreements to carry out not more than 5 grid-scale energy storage system demonstration projects. (B) Objectives Each demonstration project carried out under subparagraph (A) shall be designed to further the development of the energy storage systems described in paragraph (4). (C) No project ownership interest The Federal Government shall not hold any equity or other ownership interest in any grid-scale energy storage system that is part of a demonstration project under this paragraph. (7) Testing and validation The Secretary shall accelerate the standardized testing and validation of grid-scale energy storage systems under the program through collaboration with one or more National Laboratories (as defined in section 2 of the Energy Policy Act of 2005 ( 42 U.S.C. 15801 )), including by developing testing and evaluation methodologies for— (A) standardized grid performance testing for energy storage systems, materials, and technologies during each stage of development, beginning with the research stage and ending with the deployment stage, including performance testing with charge and discharge protocols to evaluate power capability, energy output, and degradation during cycling and calendar aging on earliest stage commercially viable prototypes (commonly less than 100 kilowatts)