Coal Plant Grids

Duke Energy has begun operating a large battery energy storage system at the site of its former Allen coal plant on Lake Wylie, helping support cleaner and more reliable electricity for customers in North Carolina and South Carolina. The new 50-megawatt battery stores energy for up to four hours, allowing electricity generated from renewable sources to be used when demand is higher. This helps reduce reliance on fossil fuels and supports lower carbon emissions.

The project reuses land from a retired coal facility, helping transition the site from carbon-intensive generation to cleaner energy infrastructure. Duke Energy also plans to build a second, larger battery system at the same location, further strengthening grid flexibility and resilience. Federal investment tax credits reduce overall project costs while supporting reinvestment in an energy community affected by the coal plant’s closure.

Together, these battery systems help stabilize the power grid, support renewable energy integration, reduce environmental impact, and contribute to a more sustainable energy future.

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