ACE Max is a kilowatt class propulsion system using krypton or xenon propellant for missions requiring high total impulse per thruster. ACE Max is ideal for communication satellite constellations, for small GEO spacecraft, and as an enabling technology for high throughput LEO, GTO-GEO transfer, and cislunar missions. ACE Max includes a magnetically shielded thruster which is tuned to optimize performance with krypton propellant. The thruster is matched to an Apollo radiation-hardened, 95% efficient, single board PPU, a propellant management system with flight heritage components, and a COPV tank sized to fit customer mission requirements. ACE Max has been selected for programs such as a GEO mission and a commercial constellation with several hundred satellites