; (B) geothermal energy; (C) hydropower; (D) landfill gas; (E) municipal solid waste; (F) ocean (including tidal, wave, current, and thermal) energy; (G) organic waste; (H) photosynthetic processes; (I) photovoltaic energy; (J) solar energy; and (K) wind. (6) Secretary The term Secretary means the Secretary of Energy. 3. Energy storage research program (a) In general The Secretary shall carry out, within the Office of Electricity Delivery and Energy Reliability, a program for the research of energy storage systems. (b) Authorization of appropriations There is authorized to be appropriated to carry out this section $50,000,000. 4. Energy storage system demonstration and deployment loan program (a) Loan program (1) In general Subject to the provisions of this subsection and subsections (b) and (c), the Secretary shall carry out a program to provide to eligible entities— (A) loans for the demonstration and deployment of energy storage systems in a specific project; and (B) loans to provide funding for programs to finance the demonstration and deployment of multiple energy storage systems through a revolving loan fund, credit enhancement program, or other financial assistance program. (2) Eligibility Entities eligible to receive a loan under paragraph (1) include— (A) a State, territory, or possession of the United States; (B) a State energy office; (C) a tribal organization (as defined in section 4 of the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 450b )); (D) an institution of higher education (as defined in section 101 of the Higher Education Act of 1965 ( 20 U.S.C. 1001 )); and (E) an electric utility, including— (i) a rural electric cooperative; (ii) a municipally owned electric utility