If you’re a Duke Energy Progress or Duke Energy Carolinas customer, you can expect to see major rate hikes in the next three years. Rates are projected to increase by 19 percent in that period and could even double within six years. Duke tells the North Carolina Utilities Commission, which must approve the hikes, that they are needed to update the energy grid and continue providing reliable service. WRAL Investigates reporter Cullen Browder walks us through the potential changes and how it could impact your wallet.