 Advances such as direct power drive from the solar arrays and single and/or two-stage operation will allow payloads of 13 to 15 metric tons per 20 metric tons to LEO from launch as opposed to only 2 metric tons using chemical propulsion.Trip times from LEO to GEO are also reasonable at 120 to 230 days depending on performance setpoint.The proposed Hall thruster system consisted of four 50 kW krypton Hall thrusters directly driven from a 200 kW solar array.