What is the Most Common RV Battery Size?

What is the Most Common RV Battery Size?

In this blog, we will explore the most common RV battery sizes and their typical applications to help you make an informed decision when choosing a battery for your RV.

When it comes to outfitting your recreational vehicle (RV) for a trip, ensuring that you have the right battery is crucial for a reliable power supply. RV batteries come in various sizes and capacities, each suited to different types of RVs and usage demands. In this blog, we will explore the most common RV battery sizes and their typical applications to help you make an informed decision when choosing a battery for your RV.

Understanding RV Battery Sizes

RV batteries are categorized by their physical size, capacity, and the type of service they are designed to provide. The most common RV battery sizes are grouped based on the Battery Council International (BCI) group number, which provides a standard for battery dimensions and terminal configuration. Here, we'll focus on the most frequently used sizes in the RV world.

Table: Common RV Battery Sizes

BCI Group Number Approximate Dimensions (L x W x H in inches) Typical Capacity (Ah) Common Uses
Group 24 10.25 x 6.8 x 8.9 70-85 Ah Smaller RVs, light applications
Group 27 12.1 x 6.6 x 8.9 85-105 Ah Medium-sized RVs, moderate power needs
Group 31 13 x 6.8 x 9.4 95-125 Ah Larger RVs, heavy-duty applications
6V GC2 10.3 x 7.1 x 10.8 180-225 Ah High capacity needs, often used in pairs

Choosing the Right Size

  1. Group 24 Batteries: These are typically used in smaller RVs or for those who do not require a significant amount of power. They are compact, making them easy to fit in tight spaces. Suitable for powering basic lights and small appliances.

  2. Group 27 Batteries: Offering a good balance between size and capacity, Group 27 batteries are ideal for medium-sized RVs. They are capable of handling more extensive electrical demands, such as powering larger appliances and multiple electronic devices.

  3. Group 31 Batteries: These are suitable for larger RVs with higher power requirements. Group 31 batteries can handle more substantial loads and are often used in RVs equipped with multiple high-energy appliances and accessories.

  4. 6V GC2 Batteries: Often used in pairs to create a 12V system, these batteries are known for their high capacity and durability. They are typically found in larger RVs where sustaining power for extended periods is necessary, such as in full-time living situations.


Choosing the right battery size for your RV depends on your specific power needs, the size of your RV, and how you plan to use it. Group 24 and 27 batteries are sufficient for most casual users, while Group 31 and 6V GC2 batteries are better suited for those with larger vehicles or more intensive power requirements. Always consider both the dimensions of the battery compartment in your RV and the electrical demands of your appliances when selecting an RV battery. Proper sizing and capacity will ensure a smooth and enjoyable travel experience, free from power interruptions.

Prices are updated in real time

Lithium Batteries Price List

Lithium Battery Model Price Discounted Buy link
12v 100ah lithium ion battery 11 12V 100Ah $328.99 Sauver $161.00 Shop Now
Batterie au lithium 12 V 200 Ah Plus LiFePO4, BMS 200 A intégré et coupure basse température. 11 12V 200Ah Plus 200A BMS $587.99 Sauver $102.00 Shop Now
12V 300Ah LiFePO4 Lithium Battery 11 12V 300Ah $875.99 Sauver $64.00 Shop Now

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