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4.8avg. commissioner years of serviceSource: Advanced Energy United
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11.32¢avg. price per kWhSource: EIA
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12legislative session length, monthsSource: Legislative Session
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28%residential market share of the largest utilitySource: January 2025, Advanced Energy United
breakdown of market shareUtility Percentage Market Share in South Carolina
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Dominion Energy South Carolina
Market Share28% -
Duke Energy Carolinas, LLC
Market Share23% -
South Carolina Public Service Authority
Market Share7% -
Duke Energy Progress
Market Share6% -
Berkeley Electric Coop Inc
Market Share4%
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8governor years servedSource: January 2025, Advanced Energy United
Utilities
South Carolina Utilities
The schedules listed here reflect what is established in statute, rules, or Orders. However, PUCs and utilities sometimes deviate from these schedules. Please check the most recent proceeding by going to the "Important Recurring Proceedings" section for each utility below.
Policy AreaIntegrated Resource Plan
ScheduleElectrical utilities, electric cooperatives, municipally owned electric utilities, and the South Carolina Public Service Authority must each prepare and submit an integrated resource plan at least every three years. An electrical utility shall submit annual updates to its integrated resource plan to the commission.
Dominion Energy South Carolina
Ownership TypeInvestor Owned
Balancing AuthorityDominion Energy South Carolina
NERC Regional EntitySERC
Holding Company
Structure
Owns Generation
Owns Transmission
Share of Residential Customers in SC28%
Duke Energy Carolinas, LLC
Ownership TypeInvestor Owned
Balancing AuthorityDuke Energy Carolinas
NERC Regional EntitySERC
Holding Company
Structure
Owns Generation
Owns Transmission
Share of Residential Customers in SC23%
South Carolina Public Service Authority
Ownership TypeState
Balancing AuthoritySouth Carolina Public Service Authority
NERC Regional EntitySERC
Structure
Owns Generation
Owns Transmission
Share of Residential Customers in SC7%
Duke Energy Progress
Ownership TypeInvestor Owned
Balancing AuthorityDuke Energy Progress East
NERC Regional EntitySERC
Holding Company
Structure
Owns Generation
Owns Transmission
Share of Residential Customers in SC6%
Berkeley Electric Coop Inc
Ownership TypeCooperative
Balancing AuthoritySouth Carolina Public Service Authority
NERC Regional EntitySERC
Owns Generation
Owns Transmission
Share of Residential Customers in SC4%