Massachusetts Net Metering Projects Face Suboptimal Interconnection Designs

Massachusetts’ net metering program went into full effect in February, but the Massachusetts Department of Public Utilities (DPU) may have inadvertently stymied the program’s growth by issuing an order that prohibits or impedes optimal interconnection of larger projects. The Massachusetts DPU is now considering reversing course.

Under the Massachusetts’ net metering program, local utilities provide billing credit to customers with interconnected renewable energy projects that feed power into the grid. The customer that hosts the project can either use the credit against its own account or assign the credit to another account with the same utility. The amount of interconnected and net metered generation permitted under the program is subject to two separate caps, one for private entities and one for municipalities and other governmental entities. Each cap is at 3 percent of the utility’s highest historical peak load, but the rules that apply to each cap differ