Delmarva Electric Rate Case Opening Order Public Notice

E X H I B I T “A” BEFORE THE PUBLIC SERVICE COMMISSION OF THE STATE OF DELAWARE IN THE MATTER OF THE APPLICATION OF ) DELMARVA POWER & LIGHT COMPANY FOR ) AN INCREASE IN ELECTRIC BASE RATES AND ) PSC Docket No. 25-1555 OTHER TARIFF CHANGES ) (FILED DECEMBER 9, 2025) ) PUBLIC NOTICE OF THE APPLICATION OF DELMARVA POWER & LIGHT COMPANY FOR AN INCREASE IN ELECTRIC BASE RATES TO: ALL ELECTRIC CUSTOMERS OF DELMARVA POWER & LIGHT COMPANY: On December 9, 2025, Delmarva Power & Light Company (“Delmarva” or “the Company”) filed an application with the Delaware Public Service Commission (“Commission”) seeking approval for an increase in its electric base rates and certain changes to its electric tariff. In its application, Delmarva seeks an increase in annual operating revenues of $67,783,312, or an average increase of 21.7% over existing base rates. The following is a breakdown by service classification of Delmarva’s proposed increases: Service Classification Full Proposed Request ($) Percent Increase (%) RES-TOU $11,248 18.2% RES $23,961,906 18.1% RSH $17,737,896 27.3% SGS-S $3,903,009 19.1% MGS-S $7,978,775 21.8% GS-SH $72,512 18.1% GS-WH $2,852 18.1% ORL $5,502 21.9% LGS-S $2,079,135 27.2% GS-P $8,688,152 27.3% GS-T $77,221 19.0% OL $3,265,104 21.8%

On January 28, 2026, in Order No. 10949, the Commission, pursuant to 26 Del. C. § 306(a)(1), suspended the implementation of Delmarva’s request to increase its electric base rates. In accordance with 26 Del. C. 306 (b), any proposed changes to Delmarva’s electric base rates to take effect on or after July 9, 2026, shall be allowed upon the filing of a petition by Delmarva requesting such a change in rates, subject to refund and proration. The Commission will make its decision on this matter on the basis of the record evidence taken at the public evidentiary hearings. The Commission may approve or reject, in whole or in part, the proposed increase and tariff revisions and may apply a different method for allocating any increase that it approves. You are invited to review Delmarva’s application and supporting documents to determine how your interest may be affected by going to DelaFile (http://delafile.delaware.gov), the Commission’s docketing and file management system, and by searching for Docket No. 25-1555. If you wish to formally participate as a party in this matter, with the right to present evidence and be represented by counsel, you must file with the Commission a petition asking for leave to intervene in accordance with the requirements of the Commission's Rules of Practice and Procedure (26 Del. Admin. C. §1001-2.9) on or before Friday February 27, 2026. All such petitions should be filed in DelaFile according to the Commission’s rules (26 Del. Admin. C. §1001-1.6.4). Petitions filed after the deadline of February 27, 2026, will not be considered except for good cause shown. If you would like to review documents at the Commission’s offices, please contact Crystal Beenick at (302) 736-7500 or send an email addressed to Crystal.Beenick@Delaware.gov. If you wish to request copies of documents in this matter, please submit a Freedom of Information Act Request Form. The link to this form can be found by visiting this web address:

https://sos.delaware.gov/foia-requests/. The Commission will respond to your request in accordance with the Delaware Freedom of Information Act, 29 Del. C. ch. 100. If you have a disability and wish to participate or to review the materials in this matter, please contact the Commission to discuss any auxiliary aids or services you might need to help you. You may contact the Commission in person, by writing, by telephone (including text telephone), by email, or other means. If you have questions about this matter, you may call the Commission at 1-800-282-8574 (toll-free in Delaware) or (302) 736-7500 (voice and text telephone). You may also send questions regarding this matter by Internet e-mail addressed to psc@delaware.gov with “Docket No. 25- 1555” in the subject line.