On and after January 1, 2000, and until December 31, 2021, each electric supplier or any electric distribution company providing standard offer, transitional standard offer, standard service or back-up electric generation service, pursuant to section 16-244c, shall give a credit for any electricity generated by a customer from a Class I renewable energy source or a hydropower facility that has a nameplate capacity rating of two megawatts or less for a term ending on December 31, 2041, provided any customer that has a contract approved by the Public Utilities Regulatory Authority pursuant to section 16-244r on or before December 31, 2021, shall be eligible for such credit. The electric distribution company providing electric distribution services to such a customer shall make such interconnections necessary to accomplish such purpose. An electric distribution company, at the request of any residential customer served by such company and if necessary to implement the provisions of this section, shall provide for the installation of metering equipment that (1) measures electricity consumed by such customer from the facilities of the electric distribution company, (2) deducts from the measurement the amount of electricity produced by the customer and not consumed by the customer, and (3) registers, for each billing period, the net amount of electricity either (A) consumed and produced by the customer, or (B) the net amount of electricity produced by the customer. If, in a given monthly billing period, a customer-generator supplies more electricity to the electric distribution system than the electric distribution company or electric supplier delivers to the customer-generator, the electric distribution company or electric supplier shall credit the customer-generator for the excess by reducing the customer-generator’s bill for the next monthly billing period to compensate for the excess electricity from the customer-generator in the previous billing period at a rate of one kilowatt-hour for one kilowatt-hour produced. The electric distribution company or electric supplier shall carry over the credits earned from monthly billing period to monthly billing period, and the credits shall accumulate until the end of the annualized period. At the end of each annualized period, the electric distribution company or electric supplier shall compensate the customer-generator for any excess kilowatt-hours generated, at the avoided cost of wholesale power. A customer who generates electricity from a generating unit with a nameplate capacity of more than ten kilowatts of electricity pursuant to the provisions of this section shall be assessed for the competitive transition assessment, pursuant to section 16-245g and the systems benefits charge, pursuant to section 16-245l, based on the amount of electricity consumed by the customer from the facilities of the electric distribution company without netting any electricity produced by the customer. For purposes of this section, “residential customer” means a customer of a single-family dwelling or multifamily dwelling consisting of two to four units. The Public Utilities Regulatory Authority shall establish a rate on a cents-per-kilowatt-hour basis for the electric distribution company to purchase the electricity generated by a customer pursuant to this section after December 31, 2041.