NOTICE OF FILING AND PUBLIC HEARING Duke Energy Progress, LLC’s Application for Certificates of Public Convenience and Necessity for New Solar Facilities to Be Located in Scotland, Richmond, Duplin, and Wake Counties in North Carolina to Be Used in Providing Service to Customers in South Carolina Docket No. 2026-192-E Why is this Notice Important? Duke Energy Progress, LLC (“DEP” or the “Company”) filed an Application with the Public Service Commission of South Carolina (“Commission”) for Certificates of Public Convenience and Necessity (“Certificate” or “Certificates”) for four major utility facilities (collectively, the “Solar Facilities”) now under construction in the Company’s balancing authority area in North Carolina that also will serve DEP’s customers in South Carolina. What is the Company Requesting in this Case? The Company requests that the Commission issue an Order approving the Company’s plans to construct the following facilities and find that doing so is consistent with the Commission’s prior Orders regarding the Companies’ 2023 CPRE and various IRP filings: Name of Facility Description of Facility Scope of Site Location Juniper Creek Solar Paired 80 megawatt (“MW”) @ 1,160 acres, with a Scotland County, North with Storage (“SPWS”) single-axis tracking racking project area of @ 400 Carolina solar photovoltaic (“PV”) acres (privately owned electric generating system, land secured via 3 lease paired with a 32 MW / 128 agreements) megawatt-hour (“MWh”) battery energy storage system (“BESS”) Old Hundred Solar 275 MW solar PV electric @ 2,691 acres, with project Richmond County, North generating facility area of @ 1,724 acres (land Carolina secured via a purchase and sale agreement Bear Marsh Solar 80 MW solar PV electric @ 700 acres of land Duplin County, North generating facility (land secured via 2 lease Carolina agreements) Longleaf SPWS 100 MW solar PV electric 1,265 acres of DEP-owned Wake County, North Carolina generating facility, paired land with a 35 MW / 140 MWh coupled BESS S.C. Code Ann. Section 58-33-160 states that the Commission must grant a certificate, either as proposed or as modified, if the Commission finds and determines that the applicant has shown several factors, including: (1) the basis of need for the facility; (2) that the facility will serve the interests of system economy and reliability considering reasonable available alternatives and their associated costs, risks, and operating attributes; and (3) that the public convenience and necessity require the construction of the facility. Why is the Company asking the Commission to issue Certificates in this case? The Application states that the Solar Facilities are necessary for the Company to maintain system reliability, while meeting the increasing system demands associated with continued, rapid economic development in the Carolinas and a growing customer base. The case was filed pursuant to S.C. Code Ann. § 58-33-110(10) et seq. (2015 & Supp. 2025), and a hearing has been scheduled according to Order No. 2026-436 and S.C. Code Ann. Section 58-33-130 and S.C. Code Ann. Regs. 103-817. For the Company’s complete proposal visit: https://dms.psc.sc.gov/Attachments/Matter/8ceeaf14-e1f0-4cbd-9bd7-1d01e5e37d3b For the entire Case visit: https://dms.psc.sc.gov/Web/Dockets/Detail/119773 When Will the Commission hear this Case? When: Thursday, October 29, 2026 at 10:00 AM., with only attorneys present and no witnesses, and reconvening on Wednesday, November 18, 2026, at 10:00 a.m., to receive evidence and hear from witnesses and continuing, if neces- sary, on Thursday, November 19, 2026, at the call of the Chairman. Where: 101 Executive Center Drive, Hearing Room, Columbia, South Carolina 29210 Livestream: https://www.scetv.org/live/public-service-commission Who Can I Talk to About This Notice? Duke Energy Progress, LLC 803-988-7132 Office of Regulatory Staff 803-737-5230 or 1-800-922-1531 Department of Consumer Affairs 803-734-4200 or 1-800-922-1594 Public Service Commission 803-896-5100 How Can I Participate in this Case? A stakeholder may participate in the case by the ways listed below. Option A: File a Letter of Protest by • Emailing the completed Letter of Protest to contact@psc.sc.gov; or • Mailing the completed Letter of Protest to 101 Executive Center Drive, Suite 100, Columbia, SC 29210. More information is available here: https://psc.sc.gov/consumer-info/file-letter-protest Option B: File a Petition to Intervene. An Intervenor becomes a party in the case. Intervenors have the right to testify, cross-examine witnesses, seek reconsideration of the Commission’s Final Decision, and must follow the Commission’s Rules of Practice and Procedure. To intervene, you must: • Email a Petition to Intervene to contact@psc.sc.gov no later than Thursday, September 24, 2026; or • Mail a Petition to Intervene to 101 Executive Center Drive, Suite 100, Columbia, SC 29210 no later than Thursday, September 24, 2026. Please include your email address. **You must give a copy of your Petition to Intervene to all Parties in this case. Petitions to Intervene must meet the requirements of Commission Regulation 103-825 and must be approved by the Commission. In the above referenced case, if the proposed tariffs contain any request for a change of rates, the proposed rates may be changed by the Commission. Persons seeking further information about these procedures should contact the Commission at 803-896-5100 or visit its website at www.psc.sc.gov. 8/17/26 GRR