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SC Interconnection Procedures

South 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 South Carolina Public Utilities Commission (SCPUC) for single phase generation up to 100 kilowatts and the Federal Energy Regulatory Commission (FERC) Small Generator Interconnection Procedures (SGIP) for three phase generation up to 20 megawatts..

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 South Carolina Public Utilities Commission (the governing body of regulated utilities). This website is intended to provide access to the company's 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 Dec. 31, the company 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.

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 Dec. 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)
10 kW and below November 1 December 1
Greater than 10 kW up to 500 kW October 1 December 1
Greater than 500 kW up to 2 MW August 1 December 1
Above 2 MW Evaluated on a case-by-case basis. Duke Energy Progress recommends allowing a minimum of 6 months to interconnect large generation projects

 

  • Duke Energy Progress recommends pursuing interconnection at the distribution voltage level for generation up to 10 megawatts (MW).
  • Residential, single phase generation up to 20 kilowatts (kW) and nonresidential, single phase generation up to 100 kW, including solar and net-metered customers, must submit an Application to Interconnect.
  • Three phase, inverter-based generation up to 10 kW, including solar and net-metered customers, must submit the SGIP Attachment 5 Application.
  • Three phase generation up to 20 megawatts (MW), including solar and net-metered customers, must submit the SGIP Attachment 2 Application.
  • A nonrefundable application fee applies.
  • Customer is subject to monthly facilities charge if additional facilities are required for interconnection (such as metering, transformers, line extensions, etc.)
  • The interconnection process does not constitute an agreement to sell power or net-meter.
  • For drawings that show exactly how a customer-owned sell-all generating facility should interconnect to the Duke Energy Progress system, please refer to the Requirements for Electric Service and Meter Installations. (PDF)

  • For Transmission Interconnection or if wheeling power, contact: customer.generation.pec@duke-energy.com

Getting started

We recommend that you become familiar with the South Carolina Public Service Commission approved Interconnection Standards for single phase generation and the Federal Energy Regulatory Commission Small Generation Interconnection Procedures for three phase generation which govern state jurisdictional generator interconnection.

For single phase residential generation with a capacity of 20 kW or less, or single phase nonresidential generation with a capacity of 100 kW or less

1. Once you have determined the installation site and gathered technical information for the generator, you’ll need to complete an Application for Interconnection. 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 completed Application to the address below along with non-refundable application fee.

Generation Type/Capacity Application Fee
Residential up to 20kW $100
Non-residential up to 100kW  
$250
All Others notification required 

For three phase generation with a capacity of 20 MW or less

  1. Once you have determined the installation site and gathered technical information for the generator, you’ll need to complete an Interconnection Request.  This information is necessary for Duke Energy Progress to assist in accompanying procedures and agreements.

 2. Send completed application to the address below along with the non-refundable application fee.

Generation Type/Capacity Application Fee 
Deposit 
Inverter-based up to 10 kW $100 NA
Up to 20 MW and eligible for Fast Track $500 NA
Up to 20 MW and failed Fast Track or submitted for Study Process  
NA $1,000

 

Send all applications and correspondence to:

Mailing Address:
Duke Energy Progress
Attention: Customer Owned Generation - Mail Code ST13A
P.O. Box 1010
Charlotte, NC 28201
E-mail: CustomerOwnedGeneration@duke-energy.com
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 you once a complete Application is received and a Duke Energy Progress representative will assist with further interconnection, energy sales or net-metering requirements.

For energy from QF generation more than 100 kW