Honda is sending its hydrogen tech to space

Honda is looking to the stars for its next hydrogen breakthrough.

The automaker is teaming up with space tech companies Sierra Space and Tec-Masters to test its high-differential pressure water electrolysis system on the International Space Station. The test is part of Honda’s vision to support life on the Moon and elsewhere in space using regenerative fuel cell technology that continuously produces hydrogen, oxygen, and electricity.

It’s another risky move from Honda, which is more bullish on hydrogen than most other automakers. Hydrogen-powered cars have historically faced a lot of hurdles, including fueling challenges and pricing pressures. But Honda is counting on hydrogen to help it decarbonize its vehicle fleet by 2040. And now it wants to tap into the most abundant element in the universe to power its push into space.

Honda says it envisions its hydrogen-powered regenerative system as part of a human settlement on the lunar surface. But it also hopes that by stress testing the technology on the Moon, it can prove its utility on Earth.

Here’s how Honda’s system works: during the lunar day, the system will use electricity generated by solar panels capturing sunlight. The company’s high-differential pressure water electrolysis system will then produce hydrogen and oxygen from water. When the Moon rotates away from the Sun, some of the oxygen will be used for astronauts, with the rest put toward generating electricity. The only byproduct of the electrolysis process is water, which is recycled back into the regenerative system, creating a closed-loop energy cycle.

Honda plans on testing the process in the microgravity environment on the ISS. The company says it will work with NASA to transport the equipment on Sierra Space’s Dream Chaser spaceplane, with Tec-Masters as the ISS technology expert.

Creating a reliable source of oxygen and electricity in space would help humans establish livable habitats off-Earth in an era when space travel seems more achievable than ever. While the science community has explored the use of electrolysis as a means to sustain life in the vacuum of space, it has found that low gravity environments will have some effect on the gas-evolving process. A study published in 2022 concluded that around 11 percent less oxygen was created through electrolysis in a lunar environment as compared to the gravity of Earth.