Notice of Applications for Rider Rate Adjustments and Public Hearing Docket No. Application of Duke Energy Carolinas, LLC, for Approval of Competitive Procurement of Renewable Energy Cost E-7 Sub 1333 Recovery Rider Docket No. Application of Duke Energy Carolinas, LLC, for Approval of Fuel and Fuel-Related Charge Adjustments for Electric E-7 Sub 1334 Utilities Docket No. Application of Duke Energy Carolinas, LLC, for Approval of Demand-Side Management and Energy Efficiency Cost E-7 Sub 1335 Recovery Rider Docket No. Application of Duke Energy Carolinas, LLC, for Approval of Clean Energy and Energy Efficiency Portfolio Standard E-7 Sub 1338 Compliance Report and Cost Recovery Rider ------------------------------------------------------------- Why am I receiving this notice? On February 24 and March 3, 2026, Duke Energy Carolinas, LLC (DEC), filed applications with the North Carolina Utilities Commission (Commission) to approve updates to the rider rates charged to customers. Rider rates are reviewed and updated each year by the Commission to ensure only reasonable and necessary costs are recovered. These costs include: 1. Fuel and fuel-related costs (including the cost of fuel used to generate electricity, transporting that fuel, and chemicals used to reduce or treat emissions) and the cost of purchased power. 2. Expenses for new demand-side management and energy efficiency (DSM/EE) measures and programs, including capital costs, administrative costs, implementation costs, incentive payments to program participants, operating costs, and incentives for utilities to adopt and implement new DSM/EE programs; 3. Compliance with North Carolina’s Clean Energy and Energy Efficiency Portfolio Standard (CEPS), which requires electric public utilities to meet a portion of its North Carolina retail sales through the generation or purchase of clean energy or energy efficiency measures; and 4. Compliance with the requirement for DEC to implement a Competitive Procurement of Renewable Energy (CPRE) program to add renewable energy to the State’s generation portfolio in a manner that allows electric public utilities to reliably and cost effectively serve customers’ future energy needs. Below is a summary of the proposed rider rates (inclusive of the regulatory fee) that would result from these applications. These rider rates, if approved, will be applicable for the billing period of September 1, 2026, through August 31, 2027, except that the DSM/EE rates will be applicable for the billing period of January 1, 2027, through December 31,2027. DEC must prove to the Commission that the requested rider rates are reasonable and prudent. Rider RESIDENTIAL GENERAL SERVICE/ LIGHTING INDUSTRIAL Requested Rate % Change Requested Rate % Change Requested Rate % Change Fuel (¢/kWh) 3.1900 10.0% 2.7426 0.0% 2.5217 -13.0% DSM/EE (¢/kWh) 0.5603 10.27% 0.6239 14.60% 0.6239 14.60% CEPS($ per customer per 1.35 -1.5% 7.30 -4.3% 45.47 -5.3% month) CPRE (¢/kWh) 0.0254 -45.63% 0.0216 -50.03% 0.0197 -52.33% For a residential consumer using 1,000 kWh per month, all together (and exclusive of any other rate changes approved outside of these proceedings), these changes, if approved, would equate to a monthly bill increase of $3.07, or 2.1% including all rider rates and base rates. For residential customers, compared to the rider rates currently in place for the billing period of September 1, 2025, through August 31, 2026, DEC’s request, if approved, would result in an increase of $0.2777 for fuel (¢/kWh); a decrease of $0.02 for CEPS ($/customer/ month); and a decrease of $0.0214 for CPRE (¢/kWh). Also for residential customers, compared to the DSM/EE rider rates currently in effect for the billing period of January 1, 2026, through December 31, 2026, DEC’s request, if approved, would result in an increase of $0.052 (¢/kWh). What are electric rider rates? A typical residential bill has several components, including: • The Basic Customer Charge, which recovers the costs of providing service to a customer, regardless of how much electricity the customer used; • The Energy Charge, which is the cost of the electricity a customer used during the billing period; • The Storm Recovery Charge, which recovers the costs to restore power after damage to the system following major storms; • The Summary of Rider Adjustments, which recovers the costs for fuel and fuel-related costs, demand-side management and energy efficiency program costs, generation assets, and the competitive procurement of renewable energy. It is this charge that is changing as a result of these proceedings. • The Clean Energy Rider, which recovers the costs of clean energy that are above the cost of non-renewable energy that DEC is required by law to make; and • State sales tax, which applies 7% to the total of the other charges. The Energy, Storm Recovery, and Summary of Rider Adjustments charges are calculated based on how much electricity you use, measured in kilowatt-hours, or kWh (and, in some cases, the rate at which you use electricity, measured in kilowatts or kW), while the Basic Customer and Clean Energy Rider charges are the same amount for every customer depending on the customer’s class (residential, commercial, or industrial). To learn more about each of these components, visit duke-energy.com/home/billing/reading- your-bill. When will my rates change? Your rates will not change immediately. The Commission has scheduled the requests for rider rate changes for investigation and hearing. The Commission should make its final determination as to DEC’s requested rider rates on or around August 20, 2026, and the approved new rider rates should go into effect on or around September 1, 2026. DEC’s DSM/EE rates should go into effect on or around January 1, 2027. You will receive another notice when the final rider rates are set indicating when the new rider rates will go into effect. How can I participate? Your input on DEC’s requests can help the Commission make an informed decision. You may (but are not required to) participate in several ways, including: Option A: You can file a written consumer statement of position in the respective dockets by visiting ncuc.gov/contactus.html. The docket number(s) must be included and are listed at the top of this notice. Option B: You can testify at the public hearing. Your testimony will become part of the evidence the Commission considers in making its decision. For helpful tips on how to give public witness testimony, visit ncuc.gov/documents/ncucbrochure.pdf. A public hearing will take place at the following location: Tuesday, June 2, 2026, at 10:00 A.M. 430 North Salisbury Street Raleigh, NC 27603 Please note that, at the public hearing, the Commissioners cannot answer questions. However, representatives from DEC and from the Public Staff (the consumer advocate) will be available to answer questions before and after the hearing, and the Public Staff can answer questions before the hearing about how to testify. In addition, the Commission will hold hearings solely for the purpose of receiving expert witness testimony from the parties’ witnesses in these proceedings in the same room immediately after the Public Hearing has ended. If you’re interested in watching the expert witness hearing, you can observe in person or you can watch it on the Commission’s YouTube channel, which can be located at youtube.com/@NCUtilitiesCommission. Please note that, if there are no complaints or contested issues between the parties, the expert witness hearing may be cancelled. Who can I talk to about these applications? The Public Staff represents customers in proceedings before the Commission. The Public Staff has a team of engineers, accountants, economists, and lawyers reviewing DEC’s requests and is scheduled to file its testimony or affidavits outlining its recommendations by May 11, 2026. You can contact the Public Staff by mail at 4325 Mail Service Center, Raleigh, NC 27699-4300. Where can I find more information? DEC’s applications were filed pursuant to the following legal authorities: Proceeding North Carolina General Statute Commission Rule or Order Fuel Chapter 62, Section 133.2 R8-55 DSM/EE Chapter 62, Section 133.9 R8-69 CEPS Chapter 62, Section 133.8 R8-67 CPRE Chapter 62, Section 110.8 R8-71 You can find the materials filed by DEC and other parties and orders issued by the Commission in this proceeding by typing the respective docket numbers (located at the top of this notice) into the Docket Number entry at the following website: starw1.ncuc.gov/ NCUC/page/Dockets/portal.aspx. You can find out more about the Public Staff at publicstaff.nc.gov. You can find out more about DEC at duke-energy.com.