Hyliion Receives EPA Confirmation on KARNO™ Power Module Regulatory Pathway
AUSTIN, Texas–(BUSINESS WIRE)–Hyliion Holdings Corp. (NYSE American: HYLN), a developer of innovative electricity-producing technology, today announced that the United States Environmental Protection Agency (EPA) has issued a determination confirming that Hyliion’s KARNO™ Power Module is not regulated as an internal combustion engine under existing federal law and regulations. Instead, the KARNO Power Module will primarily be subject to local air permitting requirements applicable to power generation installations.
In a recent announcement, the EPA stated that the agency “is getting out of the way of new, innovative technology that will strengthen economic, national, and energy security. These generators have the ability to power data centers, the electric grid, and military installations. As these generators fall outside the scope of EPA’s engine standards, they can be deployed without triggering additional permitting requirements.”
The EPA’s determination acknowledges the fundamentally different and innovative design of the KARNO Power Module and provides a clear pathway for its deployment across both stationary and mobile power generation markets. This determination along with low emission performance of KARNO technology ensures effective regulatory compliance and a more efficient permitting process for customers adopting the technology.
Thomas Healy, Founder and CEO of Hyliion, said:
Hyliion is appreciative of the EPA’s determination as it marks an important step in the commercialization journey of the KARNO Power Module,
“This clarity allows us to accelerate deployment of a solution that is versatile, reliable, and fuel-flexible, helping power the industries of tomorrow, from data centers to defense, while creating jobs here in America.”
The KARNO Power Module is a fuel-agnostic linear generator capable of operating on more than 20 fuels, including natural gas, hydrogen, ammonia, renewable gases, and conventional liquid fuels. This unique versatility allows the KARNO Power Module to serve a wide range of critical applications such as defense installations, data centers, industrial facilities, and transportation hubs where reliable and cost-effective onsite power is increasingly essential.
Powered by heat and enabled by advanced 3D metal additive manufacturing, the KARNO Power Module offers breakthrough performance while expected to meet the most stringent emissions requirements in the United States, including the standards set by the South Coast Air Quality Management District’s Rule 1110.3 for Linear Generators.
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Hyliion Receives EPA Confirmation on KARNO™ Power Module Regulatory Pathway, source




