(a) Consistent with other provisions of this chapter, the net energy measurement shall be calculated in the following manner:
(i) The electric utility shall measure the net electricity produced or consumed during the billing period, in accordance with normal metering practices;
(ii) If the electricity supplied by the electric utility exceeds the electricity generated by the customer generator, the customer-generator shall be billed for the appropriate customer charges for that month, in accordance with W.S. 37-16-102;
(iii) If the electricity supplied by the customer-generator exceeds that supplied by the electric utility, the customer-generator shall be credited or compensated for the excess kilowatt-hours generated during the month with the kilowatt-hour credit or compensation appearing on the bill for the following month for all metered locations of customer- generators supplied by the electric utility.
(b) At the beginning of each calendar year, any remaining unused kilowatt-hour credit accumulated during the previous year shall be sold to the electric utility, at the electric utility's filed avoided cost.