Since a 2 bank charger normally uses a common ground, you cannot charge a 24
volt system with it. If you sketch it out on paper, you will see you have to
create a direct short. That can ruin your day. Like others have recommended,
get a 3 bank charger and do it right.

--
Bill
Chesapeake, Va


"Charles B. Summers" cbsummers@(bellsouth)(dot)(net) wrote in message
. ..
In getting ready to replace my 12v trolling motor with a 24v, I've went
ahead and installed the second battery in the boat. So right now, I'm
wondering how to charge all three batteries with a two bank charger. I've
hooked the charger up to both trolling motor batteries, removing one set
of
leads from the cranking battery. This is just temporary so I can make sure
that the second one is fully charged in case the other runs down.

Is it necessary to recharge the starting battery all the time like the
trolling battery? I'm know the motor will keep a charge on it, but is it
enough?

What if I connect the two trolling batteries parallel? How should I charge
them?

Am I going to need a three bank charger or add a second one for the
starting
battery? I'm totally not familar with any of this...
--
Charles Summers
Secret Weapon Lures
http://www.secretweaponlures.com