Standby Power Announces Significant Financial and Business Information Due to Cautionary Trading Standards

1. Date of Fact Occurrence: 2025/04/15 2. Reason for Occurrence: As instructed by the Taiwan Stock Exchange Corporation. 3. Financial and Business Information: Period (Month) (Quarter) (Latest Four Quarters Cumulative) Latest Month YoY % Change Latest Quarter YoY % Change (Q1 2024 to Item (Feb 2025) (Q4 2024) 114 Q4)

(IFRS Consolidated Preliminary) (IFRS Consolidated Reviewed) (IFRS Consolidated Reviewed) ------------ ----------- ---------- ----------- --------------- Operating Revenue (Million) 810 0.48% 2,885 4.22% 11,293 Profit Before Tax (Million) 106 -48.86% 1,124 70.48% 2,801 Net Profit Attributable to Parent Owner (Million) 48 -46.99% 583 71.52% 1,438 Earnings Per Share (NTD) 0.29 -46.30% 3.54 71.84% 8.73 4. Whether there are any material information events listed in Article 4 of the "Procedures for Verification and Public Disclosure of Material Information by Publicly Listed Companies on the Taiwan Stock Exchange Corporation" (If "Yes", please explain): No 5. Whether there are any material information explanation press conferences listed in Article 11 of the "Procedures for Verification and Public Disclosure of Material Information by Publicly Listed Companies on the Taiwan Stock Exchange Corporation": No 6. For complete financial information, please refer to the Market Observation Post System, accessible via the following paths: (1) Recent operating revenue and profit/loss information: Basic Information > Highlights (2) Historical monthly operating revenue: Operational Overview > Monthly Revenue > Monthly Operating Revenue Information After Adopting IFRSs (3) Historical profit/loss (audited/reviewed by accountant): Financial Statements > Post-IFRS Adoption > Consolidated/Separate Statements > Statement of Comprehensive Income (4) Historical profit/loss (voluntary preliminary announcement): Operational Overview > Preliminary Profit/Loss Announcements: 7. Other matters to be stated: None.