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Small Generator Interconnection Process


The Maine Public Utilities Commission has Chapter 324, Small Generator Interconnection Procedures which lists the procedures for interconnecting to Emera Maine’s distribution system.

Interconnection Procedures:

  • Complete Interconnection Application
    • Level 1 Interconnection Application for Certified, Inverter-Based Generating Facilities Not Greater than 25 kW
    • Level 2, Level 3 and Level 4 Interconnection Application where:
      • Level 2 - For certified generating facilities that pass certain specified screens and have a power rating of two megawatts (2MW) or less. The T&D Utility shall adopt procedures in accordance with § 11 for this level of review.
      • Level 3 - For certified generating facilities that: (a) pass certain specified screens; (b) do not export power beyond the Point of Common Coupling; and (c) have a power rating of ten megawatts (10MW) or less. The T&D Utility shall adopt procedures in accordance with § 12 for this level of review.
      • Level 4 - For all generating facilities that do not qualify for Level 1, Level 2 or Level 3 interconnection review processes, and are not subject to the jurisdiction of FERC. The T&D Utility shall adopt procedures in accordance with § 13 for this level of review.
  • Certificate of Completion
  • Remit Interconnection Application Fee as set by the MPUC under Chapter 324 § 10.G., 11.I., 12.H., and 13.U.

New Inverter Source Requirement from ISO-NE as of 9/1/2018

  • All inverter-based applications shall be certified per the requirements of UL 1741 SA as a grid support utility interactive inverter.
  • Applications shall have the voltage and frequency trip points specified in Tables I and II of the Requirement Document (below).
  • The inverters shall have the ride-through capability per abnormal performance category II of IEEE Std 1547-2018 (2nd ed.) as quoted in Tables III and IV of the Requirement Document.
  • Other functions required by UL 1741 SA shall comply with the requirements specified in Table V of the Requirement Document. For functions not activiated by default, the inverter is compliant if tested to the manufacturers stated capability.
Access the Requirement Document here.

Level Nameplate Rating Application Fee
Level 1 Inverter-Based Generators Not Greater than 25KW $100
Level 2 Generators Not Greater than 2MW $100 plus $2.00/KW
Level 3 Non-Exporting Generators Not Greater than 10MW $100 plus $3.00/KW
Level 4 All Generators Not Subject to FERC Jurisdiction $100 plus $4.00/KW ($2000 max)

Additional Documents related to Interconnection/Net Energy Billing:

For questions about the Interconnection Process, please contact our Net Billing Coordinator:

Phone: (207) 973-2607
Toll free: 1-855-770-3985
Email: NetBilling@emeramaine.com

Related Information:

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Emera Maine provides electric delivery service to two areas – the Bangor Hydro District and the Maine Public District.

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