How energy works
Most of the electricity in the United States is generated using fossil fuels. Duke Energy operates a system of generating plants fueled by oil or natural gas to supplement the power supply during peak times.
Coal plants have helped Duke Energy reliably meet customer needs for more than a century and represent about 27% of our generation portfolio. As we pursue cleaner energy technologies to meet increasing customer demand, we are shifting our fuel mix toward more low- and no-carbon fuel sources and relying less on coal-fired units.
Electricity itself cannot be stored, but the potential to create electricity can. Pumped-storage plants make it possible for us to store the potential energy of water and quickly deliver it when it is needed.
Inexpensive and environmentally friendly, hydroelectric plants harness energy produced by flowing water. While hydroelectricity accounts for only a small percentage of the electricity used by our customers, it is still an important resource.
Power generation is a complex process. Delivering electricity to your home or business depends on sophisticated distribution systems in which generating stations and power lines work together.
Safe, sound and underground. Duke Energy distributes natural gas to more than 1.5 million retail customers in the Carolinas, Tennessee, Ohio and Northern Kentucky. Natural gas is a clean, abundant and supplemental source of energy.