My battery seems to die on me about every 3-4 times I have the boat out. At times I do a lot of starting and stopping so the motor ('86 Merc 90 hp) may not have the time to keep the battery charged. However I read that the output from the rectifier should be 13-13.5 V at w.o.t. The graph in my boat was reading 14-15 V at idle and 16-16.5 V at w.o.t. Is this too much? Do I possibly have a bad rectifier or stator? I'm hoping it's just from starting/stopping fairly often but we never had this problem until last year and we've had the boat for many years. Oh, and the battery did hold a charge over the winter and I don't think it's a bad battery. Thanks!
I just figured that it is easy enough to just get a 3 bank so when the boat is not in use I can keep all 3 batteries charged. I have not bough a charger yet, maybe I will give it some more thought.
Edit: After thinking this over, with the size, weight, and heat output of the charger (as well as the cost) I think it makes sense to just
buy a 2 bank charger, I have a smaller charger i can use on the starting battery when the boat is sitting at home. Forgive me, for i am a retired engineer and I have to obsess over everything...
Congrats on the motor! I think you’ll like it.
I can’t say much on the charger location but I’ve seen them under the lid in back compartments and under center rod lockers. 160 degrees is more than I expected to hear.
Curious why you’re opting for a 3 bank charger with a 24V trolling motor. Unless you don’t feel you be running you big motor enough to keep that battery up as well?
I did buy an Minnkota Ulterra, thanks for the recommendations. I had a bunch of Cabela"s bucks saved up, which helped. Now i need to
get an onboard battery charger. Where do you guys mount these things in your boat? The manufacturer I am looking at {Noco genius)
says tht their 3-bank charger will run at 160 degrees, seems like a lot of heat in an enclosed compartment? Thanks for any input on this.
Wasn't terrible at a state park beach. Antelope island maybe. I wouldn't recommend it as a beach destination tho. Figured I was there, I'm getting in it.
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tashit
My battery seems to die on me about every 3-4 times I have the boat out. At times I do a lot of starting and stopping so the motor ('86 Merc 90 hp) may not have the time to keep the battery charged. However I read that the output from the rectifier should be 13-13.5 V at w.o.t. The graph in my boat was reading 14-15 V at idle and 16-16.5 V at w.o.t. Is this too much? Do I possibly have a bad rectifier or stator? I'm hoping it's just from starting/stopping fairly often but we never had this problem until last year and we've had the boat for many years. Oh, and the battery did hold a charge over the winter and I don't think it's a bad battery. Thanks!
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