Hyliion Successfully Showcases the KARNO Generator's Uninterrupted Multi-Fuel Operation

Hyliion Holdings Corp. (NYSE:HYLN) ("Hyliion"), a developer of sustainable electricity-producing technology, is pleased to announce the successful demonstration of the KARNO™ generator's groundbreaking fuel-agnostic capabilities, showcasing an uninterrupted transition between multiple fuel types during live operation. This achievement highlights the KARNO generator's ability to offer customers a flexible and sustainable power solution that can adapt to different fuel sources—a capability that sets it apart from conventional generators.

The KARNO generator was tested using natural gas, then adjusted to a nitrogen-rich syngas, and then operated on various mixtures of natural gas and hydrogen up to a majority hydrogen composition. Without requiring recalibration or shutdown, the generator was able to adapt to these changes while maintaining power output due to its robust design and smart control system that can accommodate real-world fuel variability. Designed to operate on over 20 different fuels, including natural gas, hydrogen, propane, diesel, ammonia, and methane, the KARNO generator offers customers the opportunity to future-proof their energy solutions by enabling the use of both traditional and alternative fuel sources that may become more widely available in the future. Additionally, the KARNO generator can achieve zero carbon emissions with specific fuels and ultra-low NOx and CO emissions, offering a more sustainable alternative to conventional generators.

"This adaptability means customers can benefit from the generator's capability to handle impure or variable fuels, making it ideal for applications in industries like oil and gas, waste gas recovery, and other environments where fuel composition may vary," said Thomas Healy, Founder and CEO of Hyliion. "I'm incredibly proud of our team's progress on this groundbreaking technology and excited to see how it will transform sustainable power solutions for our customers."

Hyliion anticipates initial deliveries to early adopter customers by the end of the year and is focusing on sectors like EV charging, data centers, waste gas utilization, and marine power. Not all compatible fuels may be available at commercial launch.

About Hyliion

Hyliion is committed to creating innovative solutions that enable clean, flexible and affordable electricity production. The Company's primary focus is to provide distributed power generators that can operate on various fuel sources to future-proof against an ever-changing energy economy. Headquartered in Austin, Texas, and with research and development in Cincinnati, Ohio, Hyliion is initially targeting the commercial and waste management industries with a locally deployable generator that can offer prime power as well as energy arbitrage opportunities. Beyond stationary power, Hyliion will address mobile applications such as vehicles and marine. The Company aims to offer innovative, yet practical solutions that contribute positively to the environment in the energy economy. For further information, please visit www.hyliion.com.

Forward Looking Statements

The information in this press release includes "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other than statements of present or historical fact included in this press release, regarding Hyliion and its future financial and operational performance, as well as its strategy, future operations, estimated financial position, estimated revenues, and losses, projected costs, prospects, plans and objectives of management are forward looking statements. When used in this press release, including any oral statements made in connection therewith, the words "could," "should," "will," "may," "believe," "anticipate," "intend," "estimate," "expect," "project," the negative of such terms and other similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain such identifying words. These forward-looking statements are based on management's current expectations and assumptions about future events and are based on currently available information as to the outcome and timing of future events. Except as otherwise required by applicable law, Hyliion expressly disclaims any duty to update any forward-looking statements, all of which are expressly qualified by the statements herein, to reflect events or circumstances after the date of this press release. Hyliion cautions you that these forward-looking statements are subject to numerous risks and uncertainties, most of which are difficult to predict and many of which are beyond the control of Hyliion. These risks include, but are not limited to, our status as an early stage the Company with a history of losses; our expectation of incurring significant expenses and continuing losses for the foreseeable future; our ability to develop key commercial relationships with suppliers and customers; our ability to retain the services of Thomas Healy, our Chief Executive Officer; the expected performance of the KARNO generator and system; the execution of the strategic shift from our powertrain business to our KARNO business, and the other risks and uncertainties described under the heading "Risk Factors" in our SEC filings including in our Annual Report (See item 1A. Risk Factors) on Form 10-K filed with the Securities and Exchange Commission (the "SEC") on February 13, 2024 for the year ended December 31, 2023. Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements. Should one or more of the risks or uncertainties described in this press release occur, or should underlying assumptions prove incorrect, actual results and plans could differ materially from those expressed in any forward-looking statements. Additional information concerning these and other factors that may impact Hyliion's operations and projections can be found in its filings with the SEC. Hyliion's SEC Filings are available publicly on the SEC's website at www.sec.gov, and readers are urged to carefully review and consider the various disclosures made in such filings.

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