240A at 50v is some serious power! 12kw (16HP) is a wee bit overkill for land use unless you are using it in a 1/5 scale vehicle or something like that. Could also be used for a moped type of thing.
Better yet, how about the 60A or 120A models priced at $279 and $345 respectively. Makes for a nice HV/low A controller. Even at "only" 60A, that's still 4HP. I wonder if any type of signal translation (pistix) is needed since it's for boat use?