hello, a group 22 is a bit smaller than a group 24. its an odd size but is just big enough to give you what you need and still save weight and size. battery groups where established by bci or battery council international to a standard sizing and application that all battery manufactures could follow. take for instance group 24 27 30 31 these batteries share the same height and width but as the number goes up the battery length increases. this is not true with all numbers. group 22 is smaller than a 24 it will do the job. i have to admit that i can't find a decent battery box for this size battery? which brings us to another point American Boat and Yatch Council and Coast Guard regulations state that a battery cannot move in any one direction more than an inch with a 90 lbs pull or the weight of the battery, this means the battery must fit the box or container. this is just enough to start and run the engine. i do not recommend ever leaving the dock with one battery. not knowing your set up i may have given you inadequate or not enough information.
