24v charging

clw426

Cadet
Joined
Oct 2, 2010
Messages
10
I have an 1986 Bayliner Capri with a 4 cyl onboard. I want to use a 24v trolling motor. Is there a way to charge the 24v battery with the 12 v alternator? Probably should have posted this on the electronics forum.
 
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tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
18,039

Google . . . "MGGi Waterproof DC/DC Converter 12V Step Up to 24V, Boost Converter 20A 480W"​

 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,531
As Ted posted, you need a DC to DC Buck/Boost converter.

Look at the specs to make sure you don't kill your alternator
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,837
Gee, why not connect the batteries in parallel for charging, and in series for running the trolling motor? I would think a battery switch would be able to do that.
 

sam am I

Commander
Joined
Jun 26, 2013
Messages
2,169
This is funny!...........How bout just using a good ole "On-Board Alternator" 2 bank charger? Here's Minn Kota's

It is dc-dc, yes and Minn Kota doesn't call it that, although technically that's is its internal design type. But more-over, this thing is designed for specifically charging batt's and not just a dumb stick constant voltage @ some rated output current (12V in to 24V @ 5A out for example) dc-dc power supply.
 
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