NASA reported on January 8, 2026, that Gateway’s Power and Propulsion Element (PPE) had been powered on successfully during development at Lanteris Space Systems in Palo Alto, California. The PPE is designed to generate 60 kilowatts and provide Gateway with electrical power, high-rate communications, attitude control, and orbital maneuvering. Its propulsion suite comprises three 12-kilowatt Advanced Electric Propulsion System thrusters manufactured by L3Harris and four 6-kilowatt BHT-6000 thrusters built by Busek; the solar arrays are undergoing testing at Redwire.
The milestone confirms operation of an integrated power-and-propulsion backbone rather than an isolated laboratory component. High electrical capacity, redundant thruster classes, communications, and orbit maintenance are prerequisites for lunar assets that must remain functional without continuous ground intervention. The design is intended for Gateway’s planned minimum 15-year mission, while AEPS qualification planning includes approximately 23,000 operating hours of vacuum testing over nearly four years. For the Ark, the main existential-risk lesson is that survivability depends on independently maintainable power, propulsion, communications, and control systems, not merely pressurized shelter volume.
The Ark team should track PPE acceptance testing, thruster wear results, solar-array deployment and degradation data, thermal-control performance, fault recovery, and actual Gateway operations after deployment. These results should feed Ark requirements for modular power buses, propulsion redundancy, autonomous safing, long-duration component qualification, and spare-part inventories. Research should also compare the PPE architecture with surface fission power and local solar-storage systems so that lunar archives are not dependent on a single orbital energy node.