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꞉꞉  Two Technologies For Different Power Needs

We are developing radioisotope systems for heat and small electrical loads, alongside fission power for larger surface operations. Each starts with the requirements of the mission it will serve.

2–10 W heat  /
1–100 W electricity

Space Batteries

A sealed radioisotope source releases heat through natural radioactive decay. That heat can support battery and payload survival. Electrical variants add a converter to supply essential mission loads.

Explore Space Battery
Space Battery radioisotope unit
40–60 kWe
continuous output

Fission BEAST Reactor

A fission reactor produces heat, which a turbine-generator converts into electricity. BEAST is our development program for continuous power and useful heat for larger lunar facilities.

Explore BEAST
BEAST fission reactor with radiator panels

Designed around the spacecraft

Power demand, operating temperature, mission duration and vehicle interfaces shape the system. Our integration work brings together heat routing, electrical conversion, controls and the connection to the customer's equipment.

FAQ
Gloved hands connecting a braided power cable

Questions about the technology

How are the two technologies different?

Space Battery uses the natural decay of a radioisotope source. BEAST uses controlled nuclear fission. They serve different power levels and follow separate development programs.

What stage are the products at?

Both are in development. The roadmap moves through electrical emulation, prototype and subsystem testing, then integrated demonstrators. Published specifications are targets for validation.