I’m in the process of buying a new 24 volt trolling motor and want to get all my ducks in a row before I take my 12volt off. I know I will need two batteries and hook them pos to neg. I need info on battery charging. I will be able to charge each battery seperately when they’re disconnected, but will it be better to buy an on-board charging system (12-24v)to handle the job better? If so, which one would be recommended?
A two bank, on board charging system (or 3 if you want to charge your starting battery too) is the ticket. Just plugin when you get home.
You can charge both batteries in parallel with one charger but it will take twice as long.
The way somebody described it to me is “one bank for each battery, regardless of whether they are hook in parallel or serial”. Basically, whether you have 2 batteries in a 12V configuration or 2 in a 24V configuration, use a 2 bank charger. Like stated above, use a 3 bank if you want to charge your starter battery and can figure out how to route the cables.
A three or 2 wire system is a totally diferent animal versus a four wire system. A four wire system turns to 24 volts at the plug in for the trolling motor. A three wire system is 24 when it leaves the batteries.
Personally I would opt for a four wire system running the extra wires. Easier to charge and if you ever needed to jump the main starting battery it is real easy to do. Or needed 12 volt for other accerories it`s a no brainer. Each trolling motor outlet has 12 volts available, versus a 3 wire system or 2 wire system.
Just My Two Cents
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