RV Battery Size Chart

RV Battery Size Chart: What Size RV Battery Will Fit My Vehicle?

This is how we start our blog. It is important to understand RV batteries before buying one for your vehicle.

The reason being, There are several battery types and different sizes on the market. And batteries are expensive. You might have to spend as much as a $500 on it if you have an old vehicle.

Plus, not all vehicles can use the same size battery.

So before you go out and buy a new battery for your RV, take some time to look at our size chart below! This will help you determine which size of battery is right for your vehicle. And don’t forget-always check with a professional when installing batteries in your RV!

What is RV Battery?

A RV battery is a type of battery used in vehicles such as RV, caravans and camper cars, and is most commonly available as a lithium-ion battery and a deep-cycle battery.

In practice, it can be used in a variety of locations and also as a marine battery.

It is also used in caravans and marine applications as a dual-purpose battery, both as a starting battery and a house battery.

Car batteries are usually named after AH (amperage per Hour) and Voltage.

What is a battery size chart?

A battery size chart is a helpful tool that can tell you the size of battery your RV will fit. The battery size chart can also help you choose the right group size of battery and types for your needs, such as a Li ion, deep cycle, AGM, or gel battery.

By using a battery size chart, you can determine the volts of battery packs and capacity, if you require an upgrade, e.g., the battery group size. In this way, you can make an informed decision and purchase batteries that are suitable for your RV’s needs.

What to consider when buying an RV battery

— Size: Decide on a battery size that is appropriate for the size of your RVs. For example, if you have a 12-volt battery on a motorhome, you could opt for a larger battery with more capacity to provide more power and run time.

— Type: Choose a battery type to fit the long period’s requirements. For example, you could use a deep cycle battery, AGM, or lithium batteries for your RV auxiliary battery. These batteries are more durable and offer greater capacity and lifespan than traditional batteries.

— Voltage: Check the voltage of the battery before purchasing it to ensure it is compatible with your vehicle. Make sure to only use batteries with the same voltage as specified by your vehicle’s manual.

— Capacity: Compare the capacity of the battery with the following size chart. Ensure that the ah capacity is enough for the demands.

— Weight: Make sure that the weight of the RV battery is compatible with your vehicle’s weight and loading capacity.

Dual purpose: starter battery to cranking the car, second use as house batteries to power RV appliances.

RV Battery Size Chart

This chart tells you how long the different size RV batteries can provide power and how many appliances they can run.

RV Battery Size Table

Battery Type Voltage Ampere kWh Appliance Drive Hour
Lithium Battery 12V 100A 1.2 kWh 600W/2 Hour,1200W/1 hour
Lithium Battery 12V 150A 1.8 kWh 600W/3 Hour,1200W/1.5 hour
Lithium Battery 12V 200A 2.4 kWh 600W/4 Hour,1200W/2 hour
Lithium Battery 12V 300A 3.6 kWh 600W/6 Hour,1200W/3 hour
Lithium Battery 12V 400A 4.8 kWh 600W/8 Hour,1200W/4 hour

The power of a typical RV appliance

Lighting system: 300W

AC: 1500W

Fan: 200W

Room Heater: 1800W

Water Heater: 1440W

How to measure the RV battery size

There are a few different ways to measure the size of an RV battery.

One way is to check with the manual or the label on the product.

You could also use a conversion chart to find out how many amps or volts your battery can provide.

The most important thing is to follow your actual needs and leave a margin—after all, batteries cannot be 100% discharged.

RV battery size chart for different types of vehicles

The above size chart is suitable for most vehicle battery options, whether used in cars, trucks, boats, camping or motor homes. In some cases, batteries cannot be used universally:

— Car batteries: Most car batteries will fit in an RV.

— Truck batteries: Some truck batteries may not fit in an RV, but most will fit in a recreational vehicle.

— Boat batteries: Boat batteries are typically designed for marine use, so they may not fit in an RV.

— Motor home batteries: Most motor home batteries will fit in an RV.

— Tesla batteries: Tesla batteries are unique and require specific care and handling, so consult a qualified technician if you plan to install one in your RV.

Types of RV batteries that are available

Wet lead-acid batteries: This type of battery is the oldest type of battery and is used in RVs and trucks. Commonly known as lead-acid batteries, these batteries use lead plates immersed in a sulfuric acid electrolyte to store energy.

Gel-cell: This type of battery is popular in golf carts and other small vehicles. It uses a type of non-rechargeable battery that contains an electrolyte made of a gel material.

Deep Cycle Battery: A deep cycle battery is a special type of lead acid battery designed for RVs. It has more capacity and can be discharged more than other types of batteries, making it ideal for long periods of use.

AGM (Absorbed Glass Mat): This type of battery is used in larger RV’s and trucks. It is a reliable alternative to wet lead-acid batteries due to its heavy built-in protective casing. However, AGM batteries aren’t as durable as wet lead-acid batteries and can’t withstand high temperatures or deep-cycle usage as well.

Li-ion: This type of battery is the most common type of battery in cars today. These batteries use lithium ions as their power source instead of lead dioxide. They are a more expensive option than lead-acid batteries.

How to Charge RV Battery?

RV batteries can be charged by external Car battery Charger, Alternator, RV Solar Charge Controller, DC to DC charger, etc.

Wet lead-acid batteries: These batteries can be charged through a standard house outlet.

Gel-cell batteries: Gel-cell batteries can only be charged by special chargers that are specifically designed for gel cells.

Deep cycle battery: A deep cycle battery should always be fully charged before first use and then thoroughly discharged once every three to six months to keep it in good condition.

Which is the best RV battery?

When shopping for an RV battery, use the size chart to choose the battery that matches your vehicle’s specifications.

Consider the wattage, amp hours, and voltage of the battery. Review the accessories included with the battery to make sure it will fit your vehicle.

When picking an RV battery, look for one that best suits your needs and budget.

Frequently Asked Questions

Does RV battery size matter?

Yes, battery size does matter. The larger the battery, the more power it can provide. However, make sure your RV’s electrical system can handle the extra load of a larger battery.

What are deep cycle batteries?

A deep cycle battery is a special type of lead acid battery designed for RVs and trucks. It has more capacity and can be discharged more than other types of batteries, making it ideal for long periods of use.

What is the size difference between lead-acid and deep cycle batteries?

Lead-acid batteries typically have a size range of 12V-120V, while deep cycle batteries can have a size range of 12V-240V. A deep cycle battery can be used in an RV if a larger battery is not available or if your RV doesn’t have a charging system.

What are the key features of a deep cycle battery?

The term deep cycle battery means that the battery can be discharged at a very low level without a significant impact on the battery life.

What are the key differences between a lead-acid and a deep cycle battery?

Lead-acid batteries are less expensive and can be used in larger vehicles, but deep cycle batteries offer better battery life and can withstand more deep cycle discharge cycles.


RV batteries are different from vehicles batteries in a few ways. They are specifically made for recreational vehicles and can be larger than vehicle batteries, which can make them more suited for your RV.

Additionally, the types of batteries that are used in recreational vehicles vary from those used in cars, so you will have to make sure to find one that is compatible with your RV’s battery size.

If you understand how batteries work and the factors that affect their lifespan, it will be easier to pick one that suits your needs. Happy battery shopping! For further reading, here is a PDF on battery size chart for RV batteries.

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