The metering equipment installed for net energy metering shall be capable of measuring the flow of electricity in two directions.
Nothing in this section shall prohibit the Electric Company from installing additional meters to separately record electricity supplied to an eligible customer-generator from the electric grid and the electricity generated and supplied to the electric grid by the eligible customer-generator. However, no customer-generator that elects to be billed on a net energy basis shall be charged directly for the cost of the additional meters or other necessary equipment.
D.C. Mun. Regs. tit. 15, r. 15-904