We wish to inform you that pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, Earnings Call is scheduled to be held on Tuesday, 27th October, 2026 at 4.30 p.m. (I.S.T.), to discuss the Company's financial performance for the quarter ended 30th September, 2026. Please find enclosed the Conference Call Dial-In details.

Ref.RIR/SEC/13947/2026 22nd October, 2026 Bombay Stock Exchange Limited The Manager – Listing Department Corporate Relationship Department, National Stock Exchange of India Ltd., 1st Floor, Rotunda Building, Exchange Plaza, C-1, G-Block, P. J. Towers, Dalal Street, Bandra Kurla Complex, Bandra (East), Mumbai-400001 Mumbai - 400051 BSE SCRIP Code : 517035 NSE Symbol : RIR Subject.: Schedule of Earnings Call Ref: Disclosure under Reg.30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 Dear Sir/Madam, We wish to inform you that pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, Earnings Call is scheduled to be held on Tuesday, 27th October, 2026 at 4.30 p.m. (I.S.T.), to discuss the Company’s financial performance for the quarter ended 30th September, 2026. Please find enclosed the Conference Call Dial-In details. Kindly take the same on record. Thanking you. Yours faithfully, For RIR Power Electronics Limited Bhavin P Rambhia Company Secretary Encls : a/a BSE: 517035 | NSE: RIR | SECTOR: POWER ELECTRONICS - SEMICONDUCTOR Earnings conference call invite | Q2 FY2027 The management of RIR Power Electronics Ltd. cordially invites you to the analyst conference call to discuss the company’s financial performance for the quarter ended September 30, 2026. Management participants: • Dr. Harshad Mehta – Non-Executive Chairman • Mr. N. Ramesh Kumar – Managing Director and Chief Executive Officer • Mr. Ankit Shah – Chief Financial Officer Details of the conference call: Date Tuesday, October 27th, 2026 Time 4.30 p.m. (I.S.T.) India Conference Access Numbers Primary number +91 22 6280 1433 Secondary number +91 22 7115 8816 International Conference Access Numbers Hong Kong 800964448 Singapore 8001012045 UK 08081011573 USA 18667462133 Express Join with Diamond Pass™ No Wait Time – Click here Please dial‐in 5‐10 minutes prior to the schedule to get connected to the call‐in time. About RIR RIR Power Electronics Limited (BSE: 517035, NSE: RIR) is a global pioneer in high-power semiconductor solutions, driving innovation and energy efficiency. Its portfolio of high-performance semiconductor devices, assemblies, and energy management systems enables customers to address the evolving demands of modern energy systems. The company’s innovative products and solutions empower energy performance at the highest level in both existing and emerging applications. Trusted worldwide for reliability and performance, RIR stands at the forefront of sustainable energy innovation, powering progress, one breakthrough at a time. For more information, visit RIR’s website at www.rirpowersemi.com RIR Power Electronics Limited Investor & Media Veritas Reputation PR Pvt Ltd Ankit Shah Abhishek Savant: +91 81088 48822 Chief Financial Officer Puspanjali: +91 88268 87294 +91 98200 51272 Ketan Netawate: +91 88570 92518 ankit.shah@rirpowersemi.com abhishek@veritasreputation.com