If you have 3 battery's total you would want a 3 bank onboard charger. These chargers are just meant to charge all 3 batteries while on shore, they do not hook into your main motors alternator, only the battery that is hooked to the big motor will charge your cranking battery while running on the water. If you want that feature Minn Kota has a unit that will do just that...adding to the complexity of the system on your boat and I do not know much about that system so I can't commment. I have 4 batteries on my boat and have a 4 bank charger, all the batteries are hooked up to it, when on shore I plug it in and all the battery's are charged. I have a dedicated cranking battery for my Optimax, the rest are for my 36V minn kota bow mount and engine mount EM motor and all my accessories, lights, gps, cd player, riggers etc. Use the cranking battery for just that, cranking only, if you run out of juice on the lake you will not be able to start your motor.

 

Does anyone no here have a Cabela's® ProSport II On-Board Marine Battery Charger? What are your guys opinion on this charger compared to other brands?
Thanks

 

I just bought a minnkota mk315-d 3 bank digital for 173.00 from the factory outlet store. Comes with 3 year warranty.

 

I have a promariner 2 bank in my boat and Only use it for the trolling motor. All my other electronics run off the motor battery and it charges off the alternator. Mine charges independently for each bank, I think most do.

 

If you have 2 trolling motor batteries they are wired in series which makes 24 volts. If you wire your electronics to 1 of the 2 trolling motor batteries it would still get 24 volts which would trip your fuses or fry your electronics or both. I also have a Promariner 3 bank charger on my 36 volt trolling motor. It has to be like 15 years old and still works fine. I also have 2 batteries in the rear for my main motor electronics and kicker motor. I put a separate 2 bank charger on that a year or two ago.

 

All good info...but FWIW...Thread is 13yrs old fellars...