The Thor ACE 27.2 is a 27' class A motorhome, with dual slide-out units? not exactly the small
fiberglass trailer this forum is about...
googling Thor's website, it looks like dual AC with 50A service is an option on the 29.3 and larger. upgrading from 30A to 50A would likely require a new power center as 50A is 2 phases and requires more/larger breakers and stuff.