SC Interconnection Information

Interconnection Standard

The Standard for Interconnecting Small Generation 100 kW or Less with Electric Power Systems (pdf, 33 KB) (“Interconnection Standard”) governs residential and non-residential interconnections in South Carolina up to 100 kilowatts in size. This statewide standard was developed to streamline the interconnection process and protect the integrity of the electric grid without compromising public safety.

The Interconnection Standard permits systems that comply with IEEE 1547 and UL 1741 industry standards for anti-islanding to connect to the grid and export excess energy. Residential systems up to 20 kilowatts in size, and non-residential systems up to 100 kilowatts in size may be installed.

Customers must demonstrate liability insurance coverage to protect themselves from claims for bodily injury and/or property damage. (See Paragraph 4.9 of the Interconnection Standard)

Complete an 1) Application to Interconnect (pdf, 207 KB) with information about your facility and mail it to the address listed on the application cover sheet along with an 2) electrical one-line block diagram of your facility, 3) an insurance certificate demonstrating appropriate liability insurance coverage, and 4) a check made payable to Duke Energy Carolinas that covers your application fee.

The information in your application will be used to assess your facility’s impact to the electric grid and to design the interconnection point. We will complete an engineering review, if necessary, to determine any additional Duke-owned equipment that will be necessary for interconnection

If Duke is required to install additional equipment such as poles, transformers, metering, and protective devices as part of your facility’s interconnection to the electric grid, you may pay for these additional facilities through a monthly Interconnection Facilities Charge or prepay the cost of these facilities for thirty (30) years.

Once the Interconnection Facilities are determined and an Interconnection Agreement (pdf, 41 KB) or Purchased Power Agreement is signed, Duke will order the necessary equipment for the interconnection and schedule any equipment for installation.

Return applications for interconnection or address questions about the interconnection process to:

Duke Energy Corporation
Customer Prototype Lab
Mail Code: EY500
139 East Fourth Street
PO Box 960
Cincinnati, OH 45202

Phone: (866) 233-2290
Fax:     (513) 287-2718
Email: customerownedgeneration@duke-energy.com

Good luck with the development of your project!

NOTE: If your goal is to complete a new solar photovoltaic, wind, or micro-hydro generation project by December 31, you must submit a complete Interconnection Request in time to reach Duke Energy Carolinas prior to November 18. It is Duke Energy’s goal to process interconnection requests as quickly as possible and help projects become operational by year end; however, holiday schedules, the threat of inclement weather, and other unforeseen system emergencies may prevent Duke Energy from inspecting and approving interconnection requests and installing any necessary interconnection equipment and metering in late December for any request that is not submitted prior to November 18, or for any Interconnection Request that is submitted with incomplete information or missing documents. Please use the website checklist (pdf, 21 KB) to ensure that your interconnection request is complete.

Project construction should be completed and inspected by the local electrical inspector in time to permit Duke’s field inspection to be completed before December 13.