Zeno Power, a nuclear innovation startup redefining energy delivery in the most extreme environments, has raised a $50 million Series B funding round to accelerate the development and deployment of its advanced radioisotope power systems (RPS)—commonly referred to as nuclear batteries.
Zeno Power, a nuclear innovation startup redefining energy delivery in the most extreme environments, has raised a $50 million Series B funding round to accelerate the development and deployment of its advanced radioisotope power systems (RPS)—commonly referred to as nuclear batteries.
The round was led by Hanaco Ventures, with participation from Seraphim, Balerion Space Ventures, JAWS, Vanderbilt University, RiverPark Ventures, Stage 1 Ventures, 7i Capital, and Beyond Earth Ventures.
This latest raise brings Zeno’s total capital raised to over $70 million, following a Series A in 2022 led by Tribe Capital.
The company is scaling fast and plans to expand its team to over 100 employees across its dual headquarters in Seattle, WA and Washington, DC, while investing in manufacturing capabilities to meet growing demand in both commercial and national security markets.
Founded in 2018, Zeno Power is the market leader in nuclear batteries designed to provide reliable, long-duration energy in frontier environments where traditional power sources—like solar, chemical batteries, or fuel cells—fall short.
Their mission is simple yet profound: to power the unreachable—from the deepest ocean floors to the farthest lunar missions.
Zeno’s core innovation lies in radioisotope power systems that convert heat from the natural decay of radioactive isotopes into usable electricity.
These compact generators offer years of persistent energy and are particularly suited for remote or hazardous environments where maintenance is impossible and energy access is limited or nonexistent.
Zeno Power has already demonstrated traction in the defense and aerospace sectors. The company has secured over $60 million in contracts from the U.S. Department of Defense (DoD) and NASA for applications including:
Recent milestones include:
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