South Carolina 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, 71 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.

Good luck with the development of your project!