You are here

Interconnection Guidelines

Eligibility 
Commercial
Industrial
Local Government
Nonprofit
Residential
Schools
State Government
Federal Government
Agricultural
Institutional
Savings Category 
Solar Thermal Electric
Solar Photovoltaics
Wind (All)
Biomass
Municipal Solid Waste
Combined Heat & Power
Fuel Cells using Non-Renewable Fuels
Landfill Gas
Wind (Small)
Hydroelectric (Small)
Anaerobic Digestion
Fuel Cells using Renewable Fuels
Other Distributed Generation Technologies
Microturbines
Program Info
Sector Name 
State
State 
South Carolina
Program Type 
Interconnection
Summary 
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 Progress Energy, Duke Energy, and South Carolina Electric and Gas.

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.