Combined Heat and Power Partnership
Massachusetts Net-Metering Rules
|Date Last Updated||6/9/2014|
|Policy Type||Net-Metering Policy|
|Policy Administrator/Contact Office||Massachusetts Department of Public Utilities|
|Policy Initiation Date||1/1/1982|
|Policy Summary||Massachusetts's initial net-metering rules were created in 1982 by the state's Department of Public Utilities (DPU). These rules have been modified several times and in August 2009, the DPU issued its model net-metering tariff so that customers in Massachusetts are subject to the same net-metering tariffs regardless of utility. The state's investor-owned utilities must offer net-metering.|
Typically any type of generating facility up to 60 kW can qualify for net-metering. A generating facility that uses wind, solar, anaerobic digestion, or renewable energy at a farm may be up to 2 MW, and public facilities can be even larger (up to 10 MW) and still qualify for net-metering.
Municipal utilities are not obligated to offer net-metering, but they may do so voluntarily. The aggregate capacity of net-metering is limited to 3% of each utility's peak load for private entities, and 3% of peak load for municipalities or government entities.
There are three categories of net-metering facilities that apply to CHP:
The treatment of customer net excess generation (NEG) varies by facility class and customer type. In all cases, the NEG is monetized and "Net-Metering Credits" are calculated based on the excess kWh produced. Class II and Class III customers are required to install revenue-grade meters to measure kWh output. Credits may be carried forward to the next month indefinitely, and credits from net-metering facilities may be transferred to another customer of the same utility as long as they are within the same service territory and ISO-NE load zone.
|CHP Eligibility Requirements||Renewably-fueled CHP systems are eligible to net-meter.|
|Eligible Project Size (MW)||All systems except public facilities up to 2 MW are eligible to net-meter. Public facilities can be larger (up to 10 MW).|
|Minimum Efficiency Required/|
Other Performance Requirements
|Does Not Specify|