I had a Suncrusier that came with 30 amp service. As others have said, the components are capable of 50 amp service. You'll need a new power cable, cable between the transfer switch and breaker panel, and 50 amp breakers to replace the single 30 amp breaker. You also be doing some fairly extensive rewiring of the transfer switch, breaker panel input and EMS.
It's not for the faint of heart and you really need to know what you're doing when it comes to wiring. Bob Hatch's write up is a good place to start. If you're not comfortable with 220v wiring, don't attempt it.
2010 Winnebago Tour 42AD, Cummins ISL 400, Allison 3000, Progressive EMS, Aventa II, Air Force One, Tire Safeguard TPMS, Blue Ox Tru Center (maybe), Lotsa LEDs