Determining how long a 12-volt battery will run a trolling motor is an important consideration for boaters who rely on trolling motors for propulsion or maneuverability. The length of time that a 12-volt battery will run a trolling motor depends on several factors, including the size and power of the trolling motor, the capacity of the battery, and the speed at which the trolling motor is being used.
Trolling motor size and power
The size and power of the trolling motor are important factors to consider when determining how long a 12-volt battery will run it. Trolling motors are typically rated in pounds of thrust, which refers to the amount of force they can generate to move the boat through the water. A larger trolling motor with more thrust will require more power to operate, which will drain the battery faster.
For example, a small trolling motor with a thrust rating of 30 pounds may be able to run for several hours on a single charge, while a larger trolling motor with a thrust rating of 100 pounds may only be able to run for a few hours before the battery needs to be recharged.
Battery capacity
The capacity of the battery, measured in amp-hours (Ah), is another important factor to consider when determining how long a 12-volt battery will run a trolling motor. A battery with a higher capacity will be able to store more energy and will be able to power the trolling motor for a longer period of time.
As a general rule, a 12-volt battery with a capacity of 50 Ah will be able to run a trolling motor for around 5-7 hours at a moderate speed. However, the actual battery life may be shorter or longer depending on the size and power of the trolling motor, as well as the speed at which it is being used.
Trolling motor speed
The speed at which the trolling motor is being used will also affect the battery life. Running the trolling motor at a higher speed will drain the battery faster than running it at a slower speed.
As a general rule, a 12-volt battery with a capacity of 50 Ah will be able to run a trolling motor for around 5-7 hours at a moderate speed. However, the actual battery life may be shorter or longer depending on the specific factors mentioned above.
To maximize the battery life of your trolling motor, it’s a good idea to choose a battery with a high capacity and to use the trolling motor at the lowest speed possible while still achieving the desired result. It’s also a good idea to keep the battery charged and well-maintained to ensure that it performs at its best.
