NOTICE OF PUBLIC HEARINGS 2025 Biennial Consolidated Carbon Plan and Integrated Resource Plans of Duke Energy Carolinas, LLC, and E-100, Sub Duke Energy Progress, LLC, Pursuant to N.C.G.S. §§ 62-2(a)(3a), 62-110.1, 62-110.9, and Commission Rule 207 R8-60A Why am I receiving this notice? North Carolina General Statutes § 62-110.9 (Carbon Plan Statute) directs the Commission to take all reasonable steps to achieve reduction in emissions of carbon dioxide in the State from electric generating facilities owned or operated by Duke Energy Carolinas, LLC (DEC), and Duke Energy Progress, LLC (DEP, and together with DEC, Duke) that result in carbon neutrality by the year 2050, subject to certain discretionary extensions. In accordance with the Carbon Plan Statute, the Commission issued an Order Adopting Initial Carbon Plan and Providing Direction for Future Planning on December 30, 2022, in Docket No. E-100, Sub 179 (Initial Carbon Plan). The Carbon Plan Statute directs the Commission to review the plan every two years after the adoption of the Initial Carbon Plan. The Initial Carbon Plan provided for the consolidation of the Carbon Plan and Integrated Resource Plan (IRP) processes (CPIRP, as consolidated). As a result, under Commission rules, Duke files its biennial proposed CPIRP in odd-numbered years and the Commission issues an order the following year. On October 1, 2025, Duke filed a verified petition seeking the Commission’s approval of its proposed 2025 CPIRP, which presented a preliminary base portfolio of resources, thirty sensitivity analysis portfolios, a near-term action plan, and a resulting recommended portfolio. The 2025 CPIRP contents included four chapters, thirteen appendices, and one attachment. On the same date, Duke prefiled direct testimony and exhibits of witnesses in support of its verified petition and proposed 2025 CPIRP. How can I participate? Your input on Duke’s proposed 2025 CPIRP 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. You must reference Docket No. E-100, Sub 207CS on the document you file. Option B: You can testify at a 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. Public hearings will take place at the following location: Durham: Wednesday, February 4, 2026, at 7:00 p.m Durham County Courthouse 510 South Dillard StreetDurham,NorthCarolina 27701 Wilmington: Wednesday, March 4, 2026, at 7:00 p.m.New Hanover County Courthouse 316 Princess Street Wilmington, North Carolina 28401 Webex: Monday, March 16, 2026, at 6:30 p.m. Asheville: Tuesday, March 17, 2026, at 7:00 p.m.Buncombe County Courthouse 60 Court Plaza Asheville, North Carolina 28801 Charlotte: Wednesday, March 18, 2026, at 7:00 p.m.Mecklenburg County Courthouse 832 East Fourth Street Charlotte, North Carolina 28202 Further, to provide a testimony opportunity to those who cannot attend an in-person hearing, the Commission has scheduled a remote public witness hearing on Duke’s proposed 2025 CPIRP for March 16, 2026. It will be held via WebEx and will begin at 6:30 p.m. It will end at the earlier of the last witness’s testimony or 9:30 p.m. A link to view the hearing will be available at www.ncuc.gov. Members of the public who wish to testify must register in advance of the hearing, no later than 5:00 p.m. on March 9, 2026, by completing the electronic Remote Public Witness Registration form located on the Commission’s website at www.ncuc.gov/hearings/ remotepublicregister/html. If assistance is needed, please contact 919-733-0837. Only the first 20 individuals registered will be allowed to testify at the remote hearing. Please note that, at the public witness hearings, the commissioners cannot answer questions. However, representatives from Duke 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. Who can I talk to about this application? The Public Staff represents customers in proceedings before the Commission. The Public Staff has a team of engineers, accountants, economists, and lawyers reviewing Duke’s proposed 2025 CPIRP and is scheduled to file its testimony or affidavit outlining its recommendations on March 30, 2026. You can contact the Public Staff at info@psncuc.gov or by mail at 4325 Mail Service Center, Raleigh, NC 27699-4300. Where can I find more information? Duke’s proposed 2025 CPIRP was filed pursuant to N.C. Gen. Stat. § 62-110.9 which can be reviewed at https://www.ncleg.gov/ EnactedLegislation/Statutes/PDF/BySection/Chapter_62/GS_62-110.9.pdf. You can find the materials filed by Duke and other parties and orders issued by the Commission in this proceeding by entering Docket No. E-100 Sub 207 (without commas) into the Docket Number search 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 Duke at https://www.duke-energy.com/home.