In most of the boats, you will come across; they have two battery systems they use to operate: a trolling-motor battery and a starter battery system. The starter (cranking) battery for a boat has 12-volts and delivers the cranking power the boat’s motherboard. Besides, this starter battery also plays other vital roles of the boat like sourcing power for onboard electronics.
The trolling battery, on the other hand, consist of more than one of the 12-volt batteries that are connected using a jumper wire in series form. The role of these batteries is to power the boat’s trolling motor and not used in powering other boat accessories.
When installing the trolling-motor battery, it is broken into various voltage systems. When connecting, you need to use a 6-gauge wire to make all your connections. Make sure you have installed a 50-amp circuit breaker that you can reset manually.Follow the below step or trolling battery guides to install battery on your trolling motor.
Warning: make sure you turn all switches “OFF” before you connect your system
Below is the step-by-step procedure that you need to know on how to set up the trolling-motor battery system.
Step 1: 12-Volt Motors
- Connect your RED lead to the positive battery terminal. Use the trolling motor power cable. On this connection, use a circuit breaker of 50-amp.
- Connect the other BLACK lead to the negative battery terminal from the trolling motor.
Step 2: 24-Volts Motors
You will have to use two deep cycle marine batteries each 12-volt to connect as follows:
- Connect your BLACK wire in the trolling motor power cable on one of the battery’s negative terminal (Battery B).
- Connect your RED wire to your other battery (battery A) from the trolling motor. You will have to use a 40-amp circuit to break the current of this connection.
- Use a jumper wire to connect the negative post of your battery A to the positive post of your battery B. make sure your jumper wire has the same gauge as the motor leads.
Step 3: 12-Volt/24-Volt Motors
Here, you need to use two of your 12-volt deep cycle batteries and then connect them in this manner:
- Connect your RED wire on the trolling motor power to your battery A’s positive post. You need to use a 40-amp circuit to break the connection.
- Connect your BLACK wire on the trolling motor power to your battery B’s negative post. It will be the 12-volt lead. You will also have to include a 40-amp circuit to break the connection.
- Connect your jumper from the positive point of battery B to the negative point of your battery A.
Step 4: 36-Volt Motors
Here, you need to have three of the 12-volt deep cycle batteries and then connect them using the following manner:
- Take the RED wire from your trolling motor power and connect it to the positive post of your battery A. you need to break a circuit using a 40-amp breaker for the motors having 81 pounds of thrust and under. If the motors have more than 81 lbs. Use a 50-amp circuit breaker.
- Take the trolling motor power cable and connect its Black wire to your battery C’s negative post
- Use a jumper to connect battery A’s positive to B’s negative post.
- Connect another jumper from battery B’s positive to battery C’s positive post.