24 volt question

I have just purchased a 24 volt trolling motor, batt 1 is connected pos and neg, batt 2 is as well.

my marinco receptacle is has the following:

top left A+ top right B+
bot left B- bot right A-

is this correct, using A as batt 1 and B as batt2

Re: 24 volt question

If you have a four-wire system from the batteries to the receptacle at the bow it doesn't make any difference which is battery 1 and 2. You get 12 volts from each. What you need to pay attention to is the "A" and "B" markings on the plug. "A" (+ and -) come from one of the two batteries. "B" (+ and -) come from the other battery.

Re: 24 volt question

for 24 volts you need to connect 2 12V batteries together in series. the first battery positive to the second battery negative... 24V from the second + to the first -...

Re: 24 volt question

boater5200 said:

top left A+ top right B+
bot left B- bot right A-

is this correct, using A as batt 1 and B as batt2

Click to expand...

Yes

fish_on_the_deck said:

for 24 volts you need to connect 2 12V batteries together in series. the first battery positive to the second battery negative... 24V from the second + to the first -...

Click to expand...

Nope

With a Marinco 4 prong receptacle/plug + and - from both batteries go to the receptacle separately, 4 wires/connections to the receptacle. The plug has 2 of the prongs jumpered so when you insert it into the receptacle it creates the series connection. When the plug is disconnected the batteries are not connected together at all.

Marinco also has a "charging plug" that you can attach to a battery charger which parallels the connections in the plug, so you can charge both batteries from 1- 12V single bank charger. This makes the receptacle/plug pretty versatile. If I'm not going to be using the trolling motor and want to use both batteries to power fishing lights, I use the charging plug so both batteries are paralleled, no charger attached, just the plug.

Re: 24 volt question

When making 24 volt troller wiring comments you need to consider what type of system the boat was manufactured with. Many of the bass boats had wiring that would accommodate 12 volt, 24 volt, and combo 12 and 24 motors and some had a switch/receptacle panel up front that allowed selecting 12/24 volts, as well as a "charge" position that paralleled the two batteries for charging through the troller plug. There are as many wiring systems in these boats as there are trollers. You may find a two wire system for 12 volt (single battery) or 24 volts which requires the common two batteries in series. You will also find a three wire system that provides 12 volts and 24 volts to the troller plug. For 12 volt operation in these systems only one battery provides the power -- the batteries are not paralleled. Then there is the four wire system we are discussing here.

Re: 24 volt question

Maybe I didn't make my comments clear, about the "versatility" of the marinco receptacle/plug, or maybe it was out of place. The "paralleled" charging plug has nothing to do with running a 24V trolling motor, it's only to be used for:

- charging both batteries from 1 source
- paralleling both batteries to provide more 12V power (lights, stereo, whatever), undocumented, but it works

(It's also used with 12V trolling motors, but that is not what we are discussing here... )

Re: 24 volt question

My comments were not in regard to your post Fisherdan. They were in response to Fish-On-The Deck. I agree with you.