NOTICE OF FILING Dominion Energy South Carolina, Inc.'s Request for Approval for Pilot Demand Side Management 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-Qualified, High-Use Residential Customers ("Pilot Program") with the Public Service Commission 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 enrollment 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, 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, 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 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. June 12, 2025 pjm IPL0248161 Jun 25 2025