What Group Size Is a Semi Truck Battery?

Semi-trucks have become a crucial part of the transportation industry. They are used to move goods and materials over long distances, often across multiple state lines.

As with all vehicles, semi-trucks must be kept in good working order to ensure safety and reliability. One of the key components of a semi-truck is its battery. It is important to understand the group size of a semi-truck battery in order to make sure it is the correct size for the truck.

The group size of a battery refers to its physical dimensions. It includes both the length and width of the battery as well as its height, which is usually measured in inches or millimeters. The group size also indicates how many cells are contained inside the battery, which will determine how much power it can generate.

When selecting a semi-truck battery, it is important to know what type of truck you have and its typical usage. For instance, most heavy-duty trucks use a group size 24 or 27 battery due to their large engine and high power requirements. Smaller trucks may only require a group size 31 or 34 battery.

It is also important to consider the type of climate that your truck will be operating in when selecting a semi-truck battery. In colder climates, you may need a larger capacity battery that can maintain its charge in cold temperatures. Likewise, if you plan on driving in hot climates, then you may need an even larger capacity battery that can handle high temperatures.


The group size of a semi-truck battery depends on several factors, including the type and size of truck, as well as its typical usage conditions. Heavy-duty trucks typically require group sizes 24 or 27 batteries while smaller trucks may only need group sizes 31 or 34 batteries. The type of climate that your truck will be operating in should also be taken into consideration when selecting a suitable semi-truck battery.

Photo of author

Karen Watkins