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SC Interconnection Procedures

Our customers are continually looking for ways to generate their own electricity to supplement the supply they get from our company, offset their power bills and help the environment. Whether you’re thinking about producing solar, wind or another type of energy, there are some steps to follow to streamline the process.

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

SMALL SYSTEMS OF 20 kW OR LESS – GETTING STARTED
Most small wind and solar systems fall into the category of inverter-based generation with a capacity of 20 kW and less. If this sounds like you, follow this easy process.

Step 1. Access and complete the Interconnection Request Online Application.  To view a pdf of the Interconnection Request application see Attachment 7 of the SC Interconnection Standards.  This form requires information that your installer or contractor can provide.

Step 2. Decide on a contractor/installer and the system you'd like to install.

Step 3. Complete and submit the Interconnection Request with your Interconnection Fee ($100).

Step 4. Receive approval to proceed from Duke Energy to interconnect your system with Duke Energy's system.

Step 5. Install the interconnection to Duke Energy's system.

Step 6. Access and complete this Certificate of Completion.

Step 7. Receive approval from Duke Energy to energize your newly installed system.

Step 8. Congratulations! You may begin using electricity from your newly installed system.

LARGER SYSTEMS GREATER THAN 20 kW – GETTING STARTED

Step 1. Download, print, and mail in the Interconnection Request Form. The form requires information that your installer or contractor can provide.

Step 2. Decide on a contractor/installer and the system you'd like to install.

Step 3. Complete and submit the Interconnection Request with your interconnection fee (larger than 20kW up to 100 kW - $250, larger than 100 kW up to 2 MW - $500).

Step 4. Upon successful inspection by Duke Energy, receive approval from Duke Energy to energize your newly installed system.

Step 5. Congratulations! You may begin using electricity from your newly installed system.

If you’re an interconnection customer requesting a Pre-Application Report, use Attachment 2 of the South Carolina Interconnection Procedures.

If sending by mail, send your completed Interconnection 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

 

Send all interconnection applications and correspondence to:

Mailing Address:

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

Some other things you need to know:

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 Public Service Commission of South Carolina under Docket No. 2015-362-E.

We recommend that you become familiar with the Public Service Commission of South Carolina 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, $300,000 per occurrence for non-residential installations no larger than 250 kW and $1,000,000 per occurrence for non-residential installations larger than 250 kW. 

If you intend to have a distribution interconnected generation system online by Dec. 31, 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.

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 Carolinas must receive a complete Interconnection Request Date 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 2 MW July 1

December 1

Greater than 2 MW 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 20 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.)
  • The interconnection process does not constitute an agreement to sell power or net meter.
  • For drawings of typical 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.
  • For Transmission Interconnection or if wheeling power, please see the OATT interconnection information.

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 South Carolina Public Service Commission (the governing body of regulated utilities in South Carolina). 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.