; (C) distributed solar and wind energy generation; (D) fuel cells; (E) smart thermostats and smart building technologies; (F) demand response technologies, including natural gas demand response technologies; (G) advanced metering technologies; (H) electric vehicles and electric vehicle charging infrastructure; (I) any aggregation of the distributed energy technologies and resources described in subparagraph (A) or (C); and (J) any other advanced energy technologies, as determined by the Secretary. (2) Grid efficiency study (A) In general The Secretary, in coordination with the Commission, shall carry out a study of the barriers and opportunities for advanced energy technologies that provide increased, more efficient, or more effective delivery over the existing transmission network. (B) Requirements The study under subparagraph (A) shall include— (i) an examination of— (I) the reliability, resilience, and economic benefits of technologies such as power flow control, topology optimization, and dynamic line ratings; (II) the costs, benefits, and challenges associated with deployment of the advanced energy technologies described in subparagraph (A); and (III) the impact of grid efficiency improvements on wholesale and retail electricity rates