D.C. Mun. Regs. tit. 15, r. 15-903
This section governs the billing practices applicable to participating net energy billing customers receiving SOS generation service during a billing period. In no event shall transmission or distribution-related usage charges be applied to the kilowatt- hours generated by the customer's net metering facility.
If the value of the generation (generation value) used to supply the customer's usage exceeds the generation value of the electricity generated by the customer's net metering facility during the billing period, the customer-generator will be billed for the difference between the generation value of the energy consumed and the energy supplied.
For an SOS customer that is a customer-generator:
If the electricity generated during the billing period by the customer-generator's facility exceeds the customer-generator's kWh usage during the billing period (excess generation), the customer-generator's next monthly bill will be credited in kWh for the excess generation. At the end of the calendar year (December), excess generation that exceeds 100% of the annual consumption, will be compensated at the generation rate only, per kWh. If a credit is greater than $25 at the end of the calendar year, the Electric Company is directed to issue a refund to the customer. If the excess generation credit at the end of the calendar year is not greater than $25, the remaining credit shall be carried over until such time as the full credit has been exhausted.
If the customer's kWh usage exceeds the electricity generated by the customer's net metering facility during the billing period, the customer-generator will be billed transmission and distribution related usage charges on the net energy supplied to the customer during the billing period.
Net energy billing applies only to kilowatt-hour usage charges. Net energy billing customers are responsible for all other charges applicable to the customer's rate class and recovered through fixed amounts or over units other than kilowatthours, including customer, demand and/or minimum charges, as applicable.
D.C. Mun. Regs. tit. 15, r. 15-903