Notice of Filing Application of Duke Energy Progress, LLC for Approval of Demand-Side Management and Energy Efficiency Rider 17, Decreasing Residential Rates and Decreasing Non-Residential Rates Docket No. 2025-203-E Why is this Notice Important? • This Notice is for electric utility customers of Duke Energy Progress, LLC (the “Company”) and interested persons. • TheCompanyfiledanApplicationforApprovalofDemand-SideManagement (“DSM”)andEnergyEfficiency (“EE”)Rider for2026 (“Rider17”), thatwill decrease residential rates and decrease non-residential rates with the Public ServiceCommissionofSouthCarolina(the“Commission”),andtheCommission decideswhatratesautilitycancharge. What is Duke Energy Progress, LLC asking the Commission to approve? • TheCompanyhasrequestedthefollowing: o Approval to recover its costs and revenue associated with DSM and EE programsunderS.C.CodeAnn.§58-37-20. o ApprovaloflowerratesthantheCompanyiscurrentlyrecoveringunderits previousDSM/EERider 16 filing for both residential and non-residential customers. • TheCompanywantstheCommissiontoissueanOrder: o Allowing the Company to recover the following revenue through the proposedRider17: • $13,028,849fromResidentialCustomers;and • $(2,001,672)fromGeneralServiceCustomers. • BasedonthetotalcoststoberecoveredundertheproposedRider17,asshownon Exhibit1ofthefiling,thebillingfactorsapplicabletoSouthCarolinaCustomers forthebillingperiodofJanuary1,2026,throughDecember31,2026,wouldbe asfollows: Rate Class EE Rate DSM Rate Adjustment* DSM/EE Annual Rider Residential 0.249 0.377 0.003 0.629 GeneralService–EEOnly (0.123) 0.000 (0.001) (0.124) GeneralService–DSMOnly 0.000 0.009 0.000 0.009 Lighting 0.000 0.000 0.000 0.000 * Adjustment includes charges related to SC GRT and Reg Fee. Note: All billing factors are rounded to the nearest thousandth of a cent. The casewasfiledaccordingtoS.C.CodeAnn.Section58-37-20andS.C.CodeAnn.Regs.103-819 and103-823,andtheRulesofPracticeandProcedureoftheCommission. For the entire Case visit: https://dms.psc.sc.gov/Web/Dockets/Detail/119426 Intervention deadline: Friday, September 12, 2025 Intervenors must file written comments with the Commission regarding Duke Energy Progress, LLC’s Application in Docket No. 2025-203-E, on or before October 12, 2025 (Order No. 2022-506). Manner of filing Intervention: EmailaPetitiontoIntervenetocontact@psc.sc.gov or mail a Petition toInterveneto101ExecutiveCenterDrive,Suite100,Columbia,SC29210.Pleaseincludeyouremail address. YoumustgiveacopyofyourPetitiontoIntervenetoallPartiesinthiscase. Manner to file Letters of Protest: FilePublicCommentsorLettersofProtestbyemailing contact@psc.sc.govormailPublicCommentsorLettersofProtestto101ExecutiveCenterDrive,Suite 100,Columbia,SC29210. Forquestionsregardingthisfiling,contacttheOfficeofRegulatoryStaffat1-800-922-1531,theSouth CarolinaDepartment ofConsumerAffairsat1-800-922-1594,DukeEnergyProgress,LLC,803-988- 7132,orforpublicinformationonthisfiling,contactthePublicServiceCommissionat1-803-896-5100. 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. PersonsseekingfurtherinformationabouttheseproceduresshouldcontacttheCommissionat 803-896-5100 orvisititswebsiteatwww.psc.sc.gov. July9,2025 GRR