trolling motor battery charging

M

mb4859

Cadet
Joined
Apr 4, 2010
Messages
6
I am installing a 12 volt trolling motor on my pontoon with two 12 volt batteries to run the trolling motor. I have a third 12 volt battery to start the 70 hp yamaha. Is there a way to hook up the trolling motor batteries to the outboard and charge them when you are running down the lake?
 
MH Hawker

MH Hawker

Vice Admiral
Joined
Jul 13, 2011
Messages
5,516
Re: trolling motor battery charging

sure. a battery selector switch or one of several other devices.
 
5150abf

5150abf

Vice Admiral
Joined
Aug 12, 2007
Messages
5,808
Re: trolling motor battery charging

They have those here at iboats Boat Battery Isolators - iboats.

The problem is unless your lake is really really long it will never charge all 3 batteries, I believe it works like this, when battery 1 is charged it switches to battery 2 till it is charged ect so with the minimal out put of an outboard I sure wouldn't count on that to keep all 3 batteries charged.

Also outboard alternators are dependant on rpm so you would need to be at WOT for quite a period to get any real charge out of it.

I would also reccomend one of these to keep all 3 batteries charged equally giving them the best life span ProTournament Professional Series Battery Chargers - iboats
 
You must log in or register to reply here.
Top