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N.C. Interconnection Procedures

North Carolina customers wishing to connect renewable and nonutility-owned generation resources to the Duke Energy Progress Distribution System must follow standards as adopted by the North Carolina Utilities Commission (NCUC) under Docket E-100, Sub 101.

Note: Customers intending to interconnect generation to Duke Energy Progress electric grid must adhere to all utility requirements, state and local ordinances, electrical permitting, and regulations adopted by the North Carolina Utilities Commission (the governing body of regulated utilities). This website is intended to provide access to Duke Energy Progress' relevant interconnection documents, but does not constitute a comprehensive guideline for generator installation. We recommend that customers consult with energy professionals or qualified renewable energy installers for complete project assistance.

What you need to know

If you intend to have a distribution interconnected generation system online by December 31st, Duke Energy Progress requires that your complete Interconnection Request be received by the applicable date below in order to be considered. Submission of an Interconnection Request by these dates does not guarantee that the interconnection process will be complete by the end of the year. Alternately, an Interconnection Request received after the recommended deadline may be interconnected by the end of the year depending on resource availability; however, prioritization will be given to requests received by these dates.

Interconnection Queue

The Duke Energy Progress interconnection queue posted below reflects the status of generators that have requested interconnection at distribution voltage levels with generation capacity greater than 20 kW. A list of the possible statuses and their definitions can be found here.

Update Frequency: The interconnection queue will be updated on the 15th and 30th of each month. View the interconnection queue as a PDF or Excel file.

All interconnections are subject to completion of program and interconnection process requirements, Duke Energy Progress resource availability, holiday schedules, inclement weather, and other unforeseen system emergencies.

Size of distribution interconnected generation system intended to be operational by December 31 of any yearDate by which Duke Energy Progress must receive a complete Interconnection RequestDate by which generation system receives electrical inspection approval (necessary to commission the system and set a meter)
20 kW and below October 1 December 1
Greater than 20 kW up to 500 kW October 1 December 1
Greater than 500 kW Evaluated on a case-by-case basis. Duke Energy Progress recommends allowing a minimum of six months to interconnect large generation projects


  • Duke Energy Progress recommends pursuing interconnection at the distribution voltage level for generation up to 10 megawatts (MW).
  • All generator owners, including residential solar and net-metered customers, must submit an Interconnection Request.
  • A nonrefundable application fee applies.
  • Inverter-based generators of 20 kilowatts (kW) or less, such as solar or wind, may follow a simplified procedure.
  • Generation over 20 kW requires an Interconnection Agreement.
  • Customer is subject to monthly facilities charge if additional facilities are required for interconnection (such as metering, transformers, line extensions, etc.)
  • All customers installing generation must provide a Report of Proposed Construction or, if over 2 MW, receive a Certificate of Public Convenience and Necessity from the NCUC.
  • The submission of an interconnection request does not constitute an indication of a customer’s commitment to sell the output of a facility to the utility.  For information on submitting Commitment to Sell form or requesting a power purchase agreement (PPA), please see the Qualifying Facilities Commitment to Sell Form.

  • The PPA rate for a Qualifying Facility is determined upon when a Legally Enforceable Obligation is established or the current applicable rate.
  • For drawings of recommended configurations depicting how a customer-owned generating facility should interconnect to the Duke Energy system for both Net-Metering and Purchased Power rates, please refer to these one-line diagrams.  Please note that some diagrams are state- specific.

Getting started

We recommend that you become familiar with the NCUC approved Interconnection Procedures which govern state jurisdictional generator interconnection. Once you have determined the installation site and gathered technical information for the generator, you'll need to complete an Interconnection Request. When completing the Interconnection Request, please note that Duke Energy Progress requires, among other information, the following:

1) The contact information of the installer/electrician;

2) Inverter Manufacturer's Spec Sheet (Inverter-based generation only);

3) An electrical one-line diagram showing the configuration of all generating equipment, current and potential circuits, and protection and control schemes. This one-line diagram must be signed and stamped by a licensed Professional Engineer if the generating facility is larger than 50 kW; and

4) Copy of Insurance Declaration of Coverage – The required coverage shall be an applicable building owner’s or a facility-based insurance policy with liability coverage in the amount of $100,000 per occurrence for residential installations, and $300,000 per occurrence for non-residential installations.

There are two processes, depending on the size and type of generation.

Inverter-based generation with a capacity of 20 kW and less. Most small wind and solar systems fall in this category.

1. Complete this Interconnection Request Form, or Attachment 6 of the Interconnection Procedures. The form includes a section to indicate your intentions for the energy output, whether selling power or net-metering. This information is necessary for Duke Energy Progress to assist in accompanying procedures and agreements.

2. Send the completed Request to the address below along with $100 nonrefundable application fee.

All other generators

1. An Interconnection Customer who requests a Pre-Application Report, or Attachment 3 of the North Carolina Interconnection Procedures.

2. Complete this Interconnection Request Form, or Attachment 2 of the Interconnection Procedures. The form includes a section to indicate your intentions for the energy output, whether selling power or net-metering.  This information is necessary for Duke Energy Progress to assist in accompanying procedures and agreements.  

3. Send the completed request to the address below along with the appropriate nonrefundable application fee.

Generator Capacity Application Fee
<=20kW $100
>20kW to 100kW $250
>100kW to 2MW $500
>2MW Deposit required





All applications must be sent by mail to:

Mailing Address:

Duke Energy Progress
Attention: Customer Owned Generation - Mail Code ST13A
P.O. Box 1010
Charlotte, NC 28201
Phone: 866.233.2290

Overnight Mailing Address:

Duke Energy Progress
Attention: Customer Owned Generation - Mail Code ST13A
400 South Tryon Street Charlotte, NC 28202

Note: The Interconnected Generation Office will contact the applicant once a complete request to interconnect is received and a Duke Energy Progress representative will assist with further interconnection, energy sales or net-metering requirements.

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