Deep Space Energy Raises €930K for Next‑Gen Space Power
European startup Deep Space Energy has secured €930,000 in fresh funding to develop a new generation of radioisotope thermoelectric generators (RTGs) that it claims could be up to five times more efficient than current systems used in space exploration.
Why RTGs Matter for Deep Space Missions
RTGs are long‑duration power sources that convert heat from the natural decay of radioactive material into electricity. They have powered iconic missions such as Voyager, Cassini and the Mars rovers, providing reliable energy where solar panels are ineffective due to distance from the Sun, dust, or extreme darkness.
However, traditional RTGs are bulky, relatively inefficient and expensive to manufacture. By targeting a 5x efficiency gain, Deep Space Energy aims to shrink the size and mass of power units while increasing output, a critical advantage for spacecraft designers constrained by launch costs and mission complexity.
Technology Focus and Use Cases
The company is developing advanced thermoelectric materials and improved heat‑to‑electricity conversion architectures designed for harsh environments such as deep space, the lunar surface and shadowed craters. Higher efficiency RTGs could enable:
- Long‑lived probes to the outer planets and beyond
- Persistent lunar infrastructure in regions with long nights
- Power for surface robotics in permanently shadowed areas rich in ice
- Redundant backup power for critical space habitats
Funding and Strategic Direction
The €930K round will support laboratory development, reliability testing and early qualification work with space agencies and commercial partners. The startup is positioning itself as an enabling supplier for the emerging cislunar economy and future deep space logistics networks.
By focusing on higher efficiency and modular design, Deep Space Energy is betting that compact RTGs will become a foundational technology for sustained human and robotic presence beyond Earth orbit.