I did a preliminary calculation of the Trans Pluto Injection burn from a Moon to Earth transfer orbit and came up with a requirement of 350,000 m/s of Delta V. Since the SSTV-01 has over 20,000,000 m/s of Delta V fully fueled and the SSTV-02 with its more efficient design has over 25,000,000 m/s of Delta V fully fueled, this should not be a problem for either ship. The 2 biggest problems are the burn time when keeping the G's under 3 Gs during such a long burn, and of course the slow-down burn when returning from Pluto to the Earth. Going down the gravity well of the Sun is much harder than going up it.
Dantassii
HUMONGOUS IMS shipbuilder