Code of Massachusetts Regulations
220 CMR - DEPARTMENT OF PUBLIC UTILITIES
Title 220 CMR 18.00 - Net Metering
Section 18.05 - Allocation of Net Metering Credits
Current through Register 1531, September 27, 2024
(1) Net Metering Credits shall be allocated to Customer accounts by each Distribution Company as follows:
(2) The Distribution Company shall carry forward, from Billing Period to Billing Period, any remaining Net Metering Credit balance.
(3) For a Class III Net Metering Facility, including a Class III Net Metering Facility that is a New Solar Net Metering Facility, and a Small Hydroelectric Net Metering Facility participating in the Small Hydroelectric Net Metering Program, a Distribution Company may elect to pay to the Host Customer Net Metering Credits rather than allocating such credits pursuant to 220 CMR 18.05(1).
(4) For a Class II Net Metering Facility or Class III Net Metering Facility that is also a Cap Exempt Facility, a Distribution Company shall credit or pay the Host Customer for any Net Metering Credits that are accrued in excess of its annual electricity consumption for the period running from April through the following March. The value of such excess Net Metering Credits shall be equal to the Distribution Company's Avoided Cost Rate as determined pursuant to 220 CMR 18.05(5).
(5) The Avoided Cost Rate is based on data used by ISO-NE to set prices for energy purchases and sales. A Distribution Company's annual payout amount for Net Metering Credits shall be derived by applying an adjustment factor to the value of the Net Metering Credits that accrued during the preceding 12-month period beginning from April of the preceding year and are remaining on the Host Customer's billing account as of March 31st of the current year. The adjustment factor ratio shall be the average monthly LMP rate that was realized by the settlement of the output of Net Metering facilities with ISO NE, divided by the average monthly Net Metering Credit rate that the Net Metering facility received from the Distribution Company, weighted by the monthly net excess electricity generated by the Net Metering Facility.