NOTICE OF FILING Dominion Energy South Carolina, Inc.’s Request for Approval for Pilot Demand Side Man- agement Program for Income-Qualified, High-Use Residential Customers Docket No. 2025-173-E Why is this Notice Important? • On May 30, 2025, Dominion Energy South Carolina, Inc. (“DESC” or “Company”) filed a Request for Approval for Pilot Demand Side Management Program for Income-Qual- ified, High-Use Residential Customers (“Pilot Program”) with the Public Service Com- mission of South Carolina (“Commission”). • The proposed Pilot Program, if approved, will be available to single-family residential homeowners and renters. • Commission Order No. 2024-610 instructed the Company “…to develop and file for Commission approval a pilot program that specifically targets income-qualified, high- use, single-family residential customers no later than May 31, 2025. Will all the Company’s Customers Qualify to Participate in the Pilot Program? • No, the Pilot Program requires qualifying customers to meet the following criteria: o Household income at or below 200% of the Federal Poverty Guidelines or proof of enroll- ment in a State or Federal Program with a similar income requirement; and o Customers must have high-energy usage as defined in the Company’s Request What is included in the Proposed Pilot Program? • Free Weatherization Services including direct installation of whole-home measures such as air sealing, duct sealing, and attic insulation; and • Free, Comprehensive whole-home audit performed by a Building Performance Institute certified implementation contractor located within the Company’s service territory; and • Appliances are not included Will all the Company’s Residential Customers’ Monthly Bills be impacted by the Pilot Program? • If the Pilot Program is approved by the Commission, the bill of an average residential customer using 1,000 kWh per month could increase by $0.08 in May 2026. The case was filed in accordance with Order Nos. 2024-610 and 2024-814 and S.C. Code Ann. Section 58-37-20. For the Company’s complete proposal visit: https://dms.psc.sc.gov/Attachments/ Matter/b261db33-b2ef-4b6b-8628-bb57b75ad2f1 For the entire Case visit: https://dms.psc.sc.gov/Web/Dockets/Detail/119396 Who Can I Talk to About This Notice? Dominion Energy South Carolina, Inc. 1-800-251-7234 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 completed 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, Co- lumbia, 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, appeal 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 ; or • Mail a Petition to Intervene to 101 Executive Center Drive, Suite 100, Columbia, SC 29210 no later than . Please include your email address. **You must give a copy of your Petition to Intervene to all Parties in this case. Petitions to Inter- vene 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. June 12, 2025 pjm IPL0248161 Jun 25 2025