Interconnection Guidelines (South Carolina)

From Open Energy Information

Last modified on February 12, 2015.

Rules Regulations Policies Program

Place South Carolina
Name Interconnection Guidelines
Incentive Type Interconnection
Applicable Sector Agricultural, Commercial, Fed. Government, Industrial, Institutional, Local Government, Nonprofit, Residential, Schools, State Government
Eligible Technologies Anaerobic Digestion, Biomass, CHP/Cogeneration, Fuel Cells, Landfill Gas, Microturbines, Municipal Solid Waste, Other Distributed Generation Technologies, Photovoltaics, Small Hydroelectric, Solar Thermal Electric, Wind
Active Incentive Yes
Implementing Sector State/Territory
Energy Category Renewable Energy Incentive Programs
Applicable Utilities Investor-owned utilities

External Disconnect Switch Required

Insurance Requirements Vary by system size and/or type; levels established by PSC

Net Metering Required No

Standard Agreement Yes
System Capacity Limit 100 kW for non-residential; 20 kW for residential

Date added to DSIRE 2007-01-04
Last DSIRE Review 2012-07-06

References DSIRE[1]


The South Carolina Public Service Commission (PSC) adopted simplified interconnection guidelines for small distributed generation (DG) in December 2006. These guidelines address renewable-energy systems and other forms of DG up to 20 kilowatts (kW) in capacity for residential systems, and up to 100 kW for non-residential systems. Provisions for three-phase generators are not included.

South Carolina's interconnection guidelines apply to three of the state's four investor-owned utilities -- Progress Energy, Duke Energy and South Carolina Electric and Gas. The fourth utility, Lockhart Power, is not subject to the federal Public Utility Regulatory Policies Act of 1978 (PURPA).

There is a $100 application fee for residential systems and a $250 application fee for non-residential systems. Utilities may not require residential customers to carry liability insurance beyond the amount required by a standard homeowner's policy ($100,000 minimum coverage), but non-residential generators are required to carry comprehensive general liability insurance ($300,000 minimum coverage). Generators are responsible only for upgrade and improvement costs associated directly with a system's interconnection, but these costs may be determined by utilities. Utilities are prohibited from imposing indirect fees and charges. The guidelines include a mutual-indemnification requirement.

A redundant external disconnect switch is required, and the capacity of all interconnected generation is generally limited to a maximum of 2% of rated circuit capacity. Utilities must file semi-annual reports with the PSC detailing the number of interconnection requests approved and denied, and the reasons for any denial. There are no procedures for dispute resolution.

Incentive Contact

Contact Name Philip Riley
Department Public Service Commission of South Carolina
Address 101 Executive Center Drive
Place Columbia, South Carolina
Zip/Postal Code 29210
Phone (803) 896-5154


Authorities (Please contact the if there are any file problems.)

Authority 1: PSC Order, Docket No. 2005-387-E
Date Enacted 2006-12-19

  • Incentive and policy data are reviewed and approved by the N.C. Solar Center's DSIRE project staff.[1]


  1. 1.0 1.1  "Database of State Incentives for Renewables and Efficiency (DSIRE)"