What Group Size Battery for Trolling Motor?

What Group Size Battery for Trolling Motor?If you’re an avid angler, you understand how important a trolling motor is for your fishing expeditions. Your trolling motor’s performance will depend on the battery you use, making it crucial to choose the right one. One of the major decisions you’ll have to make is selecting the best trolling motor battery group size.

The right battery group size offers better run-time, speed, and overall performance for your trolling motor. With several group sizes available in the market, it can be challenging to pick the right one. In this section, we’ll guide you through the essential factors you should consider when deciding on the battery group size for your trolling motor.

So, sit back and let’s explore the different battery group sizes to determine the best fit for your trolling motor needs.

Understanding Trolling Motor Battery Group Sizes

Choosing the right battery group size for your trolling motor is vital to your boating experience. Trolling motor battery groups are classified based on their dimensions and the number of plates they have. The most common groups are 24, 27, and 31, with each having its own advantages and disadvantages.

Trolling Motor Battery Groups

Trolling motor batteries are generally classified into three groups: Group 24, Group 27, and Group 31. The group size represents the battery’s physical size, capacity and voltage rating. Group 24 is the smallest, while Group 31 is the largest, with Group 27 being in-between.

Battery Group Sizing for Trolling Motors

Battery Group Dimensions (inches) Voltage Capacity (amp hours)
Group 24 10.25 x 6.81 x 9.88 12V 70-85
Group 27 12.00 x 6.81 x 8.75 12V 85-105
Group 31 13.00 x 6.81 x 9.44 12V 95-125

It’s important to note that the higher the group size, the larger and heavier the battery will be. Therefore, it’s essential to ensure that your boat can accommodate the battery’s size and weight.

Another aspect to consider when selecting a battery group size is the amp hours (Ah) rating, which is an indication of the battery’s capacity. A higher Ah rating means that the battery can run the motor for a more extended period, providing you with more fishing time.

However, it’s crucial to note that even though the battery group size influences capacity, it’s not always the defining factor. Different battery brands and models may have different Ah ratings within the same group size.

Therefore, ensuring that the voltage and capacity specifications of the battery align with your motor’s requirements is crucial to ensure optimal performance.

Now that we understand the different types of trolling motor battery groups let’s delve deeper into factors to consider when selecting the appropriate battery group size.

Factors to Consider When Choosing a Battery Group Size

Choosing the right group size battery for your trolling motor can be overwhelming. To make an informed decision, consider the following factors:

Considering these factors will help you narrow down your options and choose the right group size battery for your trolling motor. Remember to choose a battery that meets your specific needs and requirements.

Popular Group Sizes for Trolling Motor Batteries

When it comes to selecting the right battery group size for your trolling motor, there are a few popular options to consider. Here are some of the most commonly used group sizes for trolling motor batteries:

Battery Group Size Typical Applications Advantages Limitations
Group 24 Small to medium-sized boats Lightweight and easy to handle Limited charge and discharge cycles
Group 27 Medium-sized boats More capacity than Group 24 Can be heavy and bulky
Group 31 Large boats or boats with multiple accessories Longer run time and higher capacity than Group 24 and 27 Can be expensive

Group 24 batteries are the most common size for small to medium-sized boats. They are typically lightweight and easy to handle, making them a popular choice for beginners. However, they have limited charge and discharge cycles, which means they may not be the best option for frequent use.

For medium-sized boats, Group 27 batteries are a popular choice. They offer more capacity than Group 24 batteries but can be heavy and bulky. If you have a larger boat or multiple accessories, Group 31 batteries may be the way to go. These batteries have a longer run time and higher capacity than Group 24 and 27 batteries but can be costly.

When choosing a battery group size, it’s important to consider your specific trolling motor and its voltage requirements. Additionally, you should take into account your boating habits and the frequency of use. By considering these factors along with the advantages and limitations of each group size, you can make an informed decision on the best battery for your trolling motor.


Choosing the appropriate group size battery for your trolling motor is an essential factor that affects your fishing experience. As this article has outlined, knowing the different group sizes available and considering the necessary factors can help you make an informed decision.

Key Takeaways

The following are some of the things to remember:

  • The group size of a battery refers to its physical size and capacity.
  • Choosing the right group size can enhance your trolling motor’s performance and lifespan.
  • Factors such as battery capacity, voltage requirements, and compatibility with your motor are essential to consider when selecting a battery group size.
  • Popular group sizes for trolling motors include Group 24, Group 27, and Group 31.

By taking the time to research and understand the group sizes available and the factors to consider, you can make an informed decision and select the best battery group size for your trolling motor. This will enhance your fishing experience and ensure smooth operation of your motor.

Richard Dodds

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