Tantalus Systems Holding Inc. — Earnings Release 2023

Apr 19, 2023

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TANTALUS TO REPORT FIRST QUARTER 2023 FINANCIAL RESULTS ON MAY 9, 2023

Burnaby, British Columbia – April 19, 2023 – Tantalus Systems ( TSX: GRID ) (“Tantalus” or the “Company”), a smart grid technology company focused on helping build sustainable utilities for the future, is pleased to announce that the Company will release its financial results for the quarter ended March 31, 2023 after the market closes on Tuesday, May 9, 2023. The Company will hold a conference call and webcast to discuss the financial results on Wednesday, May 10, 2023, at 11:00 am Eastern Time.

Conference Call

Participant Dial In (Toll Free): 1-844-854-4410 Participant International Dial In: 1-412-317-5791

Participants please ask to be joined to the Tantalus Systems call.

Webcast

Webcast URL: https://event.choruscall.com/mediaframe/webcast.html?webcastid=1P9zYXYX

Replay Information

A conference call and webcast replay will be available until May 17, 2023. To access the conference call replay, please see details below:

US Toll Free: 1-877-344-7529 International Toll: 1-412-317-0088 Canada Toll Free: 1-855-669-9658 Replay Access Code: 9455841

About Tantalus Systems Holding Inc. (TSX:GRID)

Tantalus is a smart grid technology company that transforms aging one-way grids into future-proofed multi-directional grids that improve the efficiency, reliability and sustainability of utilities and the

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communities they serve. Our solutions are purpose-built to allow utilities to restore power quickly after major disruptions, adapt to rapidly shifting consumer expectations and population shifts, innovate new solutions based on the adoption of distributed energy resources and evolve their grid infrastructure at their own pace without needless cost or complexity. All this gives our user community the flexibility they need to get the most value from existing infrastructure investments while planning for future requirements. Learn more at www.tantalus.com.

Forward-Looking Information:

This news release includes information, statements, beliefs and opinions which are forward-looking, and which reflect current estimates, expectations and projections about future events, and other statements that contain words such as “believe,” “expect,” “project,” “should,” “seek,” “anticipate,” “will,” “intend,” “positioned,” “risk,” “plan,” “may,” “estimate” or, in each case, their negative and words of similar meaning. By its nature, forward-looking information involves a number of risks, uncertainties and assumptions that could cause actual results or events to differ materially from those expressed or implied by the forward-looking information. These risks, uncertainties and assumptions could adversely affect the outcome and financial effects of the plans and events described herein. Readers should not place undue reliance on forward-looking information, which is based on the information available as of the date of this news release and Tantalus disclaims any intention or obligation to update or revise any forward-looking information contained in this new release, whether as a result of new information, future events or otherwise, unless required by applicable law. The forward-looking information included in this new release is expressly qualified in its entirety by this cautionary statement.

Contact Tantalus:

Jacquie Hudson Marketing Communications Manager 613-552-4244 | jhudson@tantalus.com

Deborah Honig Investor Relations 647-203-8793 | deborah@adcap.ca

Website: www.tantalus.com LinkedIn: LinkedIn/company/tantalus Twitter: @TantalusCorp