I've read of several people having problems with the Minn Kota AC chargers.I opted for a Pro Mariner. It should be here next week.
I did go with the MK alternator charger that charges all of the banks while the motor is running. I was doing the same thing with a Blue Sea ACR, but it won't work on a 24V setup and MK was the only one who had something that would do that.