Duke Energy's latest long-range plan proposes adding two natural gas plants and extending coal plant operations in South Carolina, citing speculative data center demand as justification. The utility released the plan last Friday, triggering immediate scrutiny from energy analysts and consumer advocates concerned about cost exposure.

The company's strategy rests on projected data center growth that remains uncertain. Duke's own documents acknowledge the speculative nature of these projections. The utility seeks to lock in infrastructure investments before demand materializes, a practice that historically shifts financial risk onto ratepayers if forecasts prove wrong.

Extending coal plant operations carries particular scrutiny. These facilities face mounting operational costs and declining economics as renewable energy prices drop. Keeping aging coal assets online requires substantial capital infusions that raise electricity rates for South Carolina consumers. Duke's rationale ties this extension directly to unconfirmed data center siting decisions.

The two proposed gas plants represent additional long-term commitments to fossil fuel infrastructure during a period when renewable energy deployment accelerates nationally. Natural gas plants typically operate for 30 to 40 years once constructed, locking the grid into continued carbon emissions decades into the future.

Consumer protection advocates point to the South Carolina Public Service Commission as the regulatory body responsible for scrutinizing Duke's plan. The PSC must evaluate whether speculative data center demand justifies the capital expenditures and whether ratepayers should bear the financial risk of overcapacity if growth projections fail to materialize.

Data centers consume enormous quantities of electricity. Major technology companies increasingly site these facilities in regions offering abundant power generation. Duke Energy's service territory spans the Carolinas, making it geographically competitive for such development. However, betting utility infrastructure investment on unconfirmed commercial projects creates exposure Duke's customers ultimately absorb through higher rates.

The timing aligns with broader tensions in utility planning. Traditional utilities increasingly propose fossil fuel infrastructure while markets demand faster renewable