N.H. Rev. Stat. § 12-P:2

I. There shall be a department of energy under the executive direction of a commissioner of energy and consisting of the divisions of administration, policy and programs, enforcement, and regulatory support. II. The purpose of this chapter is to improve the administration of state government by providing unified direction of policies, programs, and personnel in the field of energy and utilities, making possible increased efficiency and economies from integrated administration and operation of the various energy and utility related functions of the state government. III. In addition to its other functions, it shall be the duty of the department of energy to provide all necessary administrative, technical, and staff support to the public utilities commission to assist the commission in carrying out its regulatory and adjudicative functions. IV. The department shall have the authority to investigate any matter that may come before the public utilities commission and to appear before the commission to advocate for the department's position and for the purposes of providing a complete record for consideration by the commission. V. The department shall develop strategies, concepts, and tools to enhance outreach and education programs to increase knowledge and awareness about energy efficiency and sustainable energy among New Hampshire residents and businesses. VI. The department shall expand upon the state government's efficiency programs to ensure that the state is providing leadership on energy efficiency and sustainable energy including reduction of its energy use and fuel costs.