In October 2025, the Board of Directors voted to advance projects that will add more than 5,000 megawatts (MW) of power for the state over the next 10 years. For perspective, Santee Cooper’s current electric system totals approximately 5,700 MW. The resource portfolio includes natural gas generation, nuclear power, solar power and what will be South Carolina’s largest battery energy storage project. These projects offer resource diversity that combines reliable base load power and flexibility.
To bring these projects online efficiently and cost-effectively, Santee Cooper has prioritized innovation, collaboration and “doing more with what we have.” The examples below highlight these priorities:
Natural Gas
Canadys Station
Santee Cooper is partnering with Dominion Energy to build a state-of-the-art Natural Gas Combined Cycle (NGCC) facility at the former Canadys Coal Station site in Colleton County. This joint project will serve as a cornerstone of South Carolina's long-term energy security, providing a modern, highly efficient source of reliable baseload power.
MW Addition: 1,090 MW (Santee Cooper's portion)
Status: The South Carolina Department of Environmental Services (SCDES) has officially issued our groundwater production wells construction permit and released the draft air permit. We remain on track to secure the final air permit and award the primary EPC (Engineer-Procure-Construct) contract by the end of 2026.
Planned In-Service Date: 2Q 2033
Rainey Combined-Cycle Conversion
Santee Cooper is adding capacity at the Rainey Generating Station in Anderson County through a highly efficient combined-cycle conversion. This process captures the waste heat from two existing simple-cycle combustion turbines and utilizes it to generate additional power without consuming any extra fuel.
MW Addition: 184 MW (bringing total new capacity to 250 MW)
Status: Engineering, procurement, and construction are underway. The project is currently on schedule and under budget. Major components are arriving on-site, and installation is in progress.
Planned In-Service Date: 1Q 2028
Winyah LM6000 Units
Santee Cooper is adding fast-start peaking capacity at the Winyah Generating Station in Georgetown County. By installing two state-of-the-art aero-derivative gas turbines, we are enhancing our ability to rapidly respond to high-demand periods and stabilize the grid as we integrate more intermittent renewable energy resources.
MW Addition: 90-107 MW (2 units)
Status: Engineering, procurement and construction are underway. Site work activities are ongoing. The installation of rigid inclusions, which are ground-improvement columns made of concrete or grout that are drilled into soft soil to increase load-bearing capacity and minimize structural settling, has been completed and work on load transfer platforms and foundations is in progress.
Planned In-Service Date: 4Q 2027
Nuclear
Santee Cooper has a tremendous opportunity to finish the partially built nuclear power units in Fairfield County, at no additional cost to our customers. We are partnering with Brookfield Asset Management, a developer with the right resources and experience to complete the units.
Status: Brookfield is currently conducting extensive due diligence and expects to make a Final Investment Decision no later than the end of 1Q 2028.
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Solar
In December, a 200-MW project developed by Silicon Ranch came online in Georgetown County. Santee Cooper and our largest customer, Central Electric Power Cooperative, each own a proportionate share of the solar power output from the project.
We continue to seek proposals for additional solar power through the competitive procurement process.
Battery Storage
Santee Cooper is deploying a massive, utility-scale battery storage system at the Jefferies site in Berkeley County. Partnering with Aypa under an innovative tolling agreement, this project allows us to store excess energy and dispatch it during peak demand times, providing incredible grid flexibility with zero direct capital expenditure from our customers.
MW Addition: 300 MW (for up to 4 hours, dispatchable up to 2 times daily)
Status: Aypa is proceeding on schedule under the tolling agreement. All major equipment manufacturing commitments were completed in the third quarter of 2026 with delivery timelines running ahead of schedule, and on-site construction is set to officially begin on September 30, 2026.
Planned In-Service Date: 4Q 2027