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Maine

Maine

Incentives/Policies for Renewables & Efficiency

Printable Version
Interconnection Standards   

Last DSIRE Review: 01/16/2013
Program Overview:
State: Maine
Incentive Type: Interconnection
Eligible Renewable/Other Technologies: Solar Thermal Electric, Photovoltaics, Wind, Biomass, Hydroelectric, Geothermal Electric, Municipal Solid Waste, Tidal Energy, Wave Energy, Other Distributed Generation Technologies
Applicable Sectors: Commercial, Industrial, Residential, Nonprofit, Schools, Local Government, State Government, Fed. Government
Applicable Utilities:Transmission and distribution utilities
System Capacity Limit:No limit specified
Standard Agreement:Varies by system size
Insurance Requirements:Not required for inverter-based systems up to 1 MW; vary by system size and/or type for other systems
External Disconnect Switch:Not required
Net Metering Required:No
Authority 1:
Date Enacted:
Resolve, Chapter 183, 123rd Legislature
04/07/2008
Authority 2:
Date Enacted:
2009-219: Order Adopting Interconnection Rule
01/04/2010
Authority 3:
Date Enacted:
CMR 65-407-324
01/04/2010
Summary:

The Maine Public Utility Commission (PUC) adopted interconnection procedures in January 2010. These rules apply to all transmission and distribution utilities operating in the state and apply to all distribution generation (not just renewables). Maine's interconnection procedures, based in part on the Interstate Renewable Energy Council Inc. 2006 Model Interconnection Procedures,* identify four different tiers with corresponding technical screens. These are:

  • Level 1: Small certified generating, inverter-based facilities 10 kilowatts (kW) or less;
  • Level 2: Certified facilities 2 megawatts (MW) or less;
  • Level 3: Non-exporting, certified facilities 10 MW or less;
  • Level 4: Any generating facility that does not qualify for the aforementioned levels of review, and are not subject to jurisdiction of the Federal Energy Regulatory Commission (FERC).

Fees for interconnection requests increase with each Level. A Level 1 request must submit $50 fee; a Level 2 request must submit a fee of $50 plus $1/kW of generator capacity; a Level 3 request must submit $100 plus $1.50/kW of generator capacity; and a Level 4 request must submit an application fee not to exceed $100 plus $2.00/kW. In addition, Level 4 applicants are responsible for fees associated with the interconnection study as well as any utility upgrades required to accommodate the requested interconnection.

The PUC specifies that IEEE Standard 1547 (“Standard for Interconnecting Distributed Resources with Electrical Power Systems”) or IEEE Standard 929 (for inverters less than 10 kW) and the standard UL 1741 for inverters, converters, and controllers as the technical standards of evaluation. Systems are considered to be certified for interconnection if the components have been tested and listed by a Nationally Recognized Testing Laboratory (NRTL) and if they meet the definition of certification under the FERC Order 2006 for Small Generator Interconnection Procedures, according to these standards. Additional controls (such as external disconnect switches) are not permitted when facilities use certified equipment.

Depending on the size of the small generator facility, insurance requirements differ. No insurance is required for inverter-based facilities with rated capacity 1 MW or less. Inverter-based facilities with rated capacity exceeding 1 MW but less than or equal to 5 MW must carry liability insurance with coverage of at least $1 million. Facilities with rated capacity greater than 5 MW must carry liability insurance with coverage of at least $2 million. Insurance coverage for non-inverter-based generating facilities ranges from no insurance (50 kW or less) to $3 million (for facilities greater than 5 MW).


* IREC updated its model interconnection procedures in 2013. The 2013 model is available on IREC's website.

The information provided here covers several important classification criteria and provides a brief summary of the procedures. Consult the actual rule for official definitions, additional restrictions, and comprehensive information on the technical screens.


 
Contact:
  Mitchell Tannenbaum
Maine Public Utilities Commission
#18 State House Station
Augusta, ME 04333
Phone: (207) 287-3831
E-Mail: mitchell.tannenbaum@maine.gov
Web Site: http://www.maine.gov/mpuc
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Disclaimer: The information presented on the DSIRE web site provides an unofficial overview of financial incentives and other policies. It does not constitute professional tax advice or other professional financial guidance, and it should not be used as the only source of information when making purchasing decisions, investment decisions or tax decisions, or when executing other binding agreements. Please refer to the individual contact provided below each summary to verify that a specific financial incentive or other policy applies to your project.

While the DSIRE staff strives to provide the best information possible, the DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. make no representations or warranties, either express or implied, concerning the accuracy, completeness, reliability or suitability of the information. The DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. disclaim all liability of any kind arising out of your use or misuse of the information contained or referenced on DSIRE Web pages.

Copyright 2013 - 2014 North Carolina State University, under NREL Subcontract No. XEU-0-99515-01. Permission granted only for personal or educational use, or for use by or on behalf of the U.S. government. North Carolina State University prohibits the unauthorized display, reproduction, sale, and/or distribution of all or portions of the content of the Database of State Incentives for Renewables and Efficiency (DSIRE) without prior, written consent.