The Complete Guide: RV battery replacement in 2024

RV batteries replacement is needed due to several factors that affect their performance and lifespan. Frequent charging and discharging cycles, exposure to extreme temperatures, and the age of the battery contribute to this degradation. Regularly replacing RV batteries ensures that you have reliable power for your appliances and devices.

How to replace my RV battery?

By following the steps below, you can successfully replace your RV battery on your own.

Cut off the power

Turn off all electrical appliances and systems. Disconnect the RV from any external power sources.

Find the battery compartment

The battery compartment is usually found on the exterior of the RV, but it can also be inside. Consult your RV manual if you're unsure. There are usually multiple batteries.

Disconnect the positive and negative terminals

First disconnect the negative terminal (black end) of the battery, then disconnect the positive terminal (red end) of the battery. To ensure safety, it is recommended that you wear safety gloves and goggles. Then remove the battery. The battery may be heavy, so you can ask for help if necessary.

Clean the battery terminals

Inspect the battery terminals and clean them if necessary. Use a mixture of baking soda and water to neutralize any acid corrosion. Dry the terminals thoroughly.

Install the New RV Battery

Install your new RV battery, attaching positive (red) terminal, then negative (black) terminal. Use a wrench to ensure connections are snug.

Test the New Battery

Reconnect your RV to an external power source if necessary. Turn on your RV and test the electrical systems to ensure the battery is functioning correctly.

Recycle old battery

Take the old battery to a recycling center or a facility that accepts used batteries. Do not throw it in the trash as it contains hazardous materials.

What kind of battery should I use in an RV?

If you need to determine what type of battery your RV battery is, check out the product label on the battery, the user manual, or inquire your RV dealer.

Flooded Lead Acid (FLA)/Wet-type

Lead Acid "wet" batteries are by far the most economical. They've also been around the longest and require the most maintenance. These are the batteries that require you to fill them with water when you first install them. They also have a fraction of the capacity and life cycle of more modern battery types.

Absorbent Glass Mat (AGM)

AGM battery is a fairly common battery type, one of the ones that we sell at Renogy. It is typically safer and easier than wet-style lead acid. It's often called a sealed battery since you don't have to add water to it to keep it working correctly. The gasses released from the effect of storing and releasing power are reconstituted back into the battery, leaving no off-gassing. These batteries also charge faster and are tougher than some of their counterparts.

To learn more about AGM batteries, please read What Is An AGM Battery?

Gel-type

Optimal for efficient energy storage, Gel batteries are the perfect choice if you need dependable power at a good price. Utilizing a thick gel-like substance in their cells, they're low maintenance and highly resistant to shock or vibration. They also can withstand wide temperature ranges and provide a better charge life than AGM batteries.

Find more related information in Solar Gel Batteries: Everything You Need To Know.

Lithium Iron Phosphate

Lithium batteries are a cut above other battery options in nearly every way, offering higher charge density, longer durability, and the ability to deep cycle while maintaining power. Renogy even offers them built-in Bluetooth monitoring so you can keep an eye on charge level, battery temperature, discharge, etc., as well as self-heating functions which allows the battery to sustain longer at freezing temperatures, for example, the 12V 100Ah Smart Lithium Iron Phosphate Battery w/ Self-Heating Function.

Renogy's supply of lithium iron phosphate batteries in 12-volt, 24-volt, and 48-volt configurations are proven as the safest ionic lithium option on the market. Their maintenance-free design yields an ultra-long life span making them a better investment in the long run.

How often do RV batteries need to be replaced?

Different types of RV batteries have different life spans.

Flooded lead-acid batteries: They usually last 3 to 5 years with proper maintenance.

Sealed lead-acid batteries (AGM and Gel): They usually last 4 to 7 years.

Lithium-ion batteries: Lithium-ion batteries are durable and can last up to 10 years or more with good maintenance.

Here are some factors that affect the lifespan of RV batteries:

1. Frequent deep charging and discharging shortens the battery life
2. Extreme cold or hot environments accelerate the aging of the battery
3. Failure to maintain and check the battery regularly

Determine if I need replace new RV battery

You can determine if your RV battery needs to be replaced by following factors:

Reduced capacity

If the battery loses power quickly, your RV battery may have reached the end of its lifespan

Visible damage.

If you notice white deposits on the battery terminals or plates, it may indicate sulfation, which can harm the battery's performance.

Slow charging

If the battery takes longer to charge than usual, it may be losing its efficiency. When the battery reaches its expected lifespan, you can proactively replace it.

How much does it cost to replace RV batteries?

The cost of RV batteries varies significantly based on their type, capacity, and brand. Flooded lead-acid batteries are the most affordable, typically priced between $100 and $300 each. Sealed lead-acid batteries, such as AGM and Gel types, are more expensive, ranging from $200 to $400 per battery, and they offer a longer lifespan compared to flooded batteries. Lithium-ion batteries are the most expensive, ranging from $800 to $2,000 per battery, due to their long lifespan, low maintenance, and fast charging. You may also need to add the cost of a charger specifically designed for lithium-ion batteries. If you decide to hire a professional to install or replace your RV battery instead of doing it yourself, you will also need to consider the installation cost. Each battery will cost about $50-175, depending on the complexity of the installation and the local labor rates.

How to maintain my RV battery

1. Check the battery regularly to make sure there is no basic damage or corrosion. Make sure the battery terminals are clean and free of corrosion. If necessary, clean them with a mixture of baking soda and water.
2. Use a multimeter to check the battery voltage. A fully charged 12V RV battery should read around 12.6-12.8V. Perform a load test to identify weak or faulty batteries.
3. Make sure the battery terminal connections are secure and not loose
4. Avoid frequent charging and discharging to maintain battery life and efficiency
5. Keep the battery charged when not in use to avoid deep discharge, which will shorten the battery life.
6. Keep the battery in a dry and cool environment, not overheated or overcooled
7. For flooded lead-acid batteries, the water level needs to be checked regularly to avoid overflowing due to excessive water level or replenishing with distilled water due to excessive water level.

Conclusion

At renogy, we are focused on not only packing our batteries with the latest and best technology but also some of the best warranties in the class. We have all major types of 12 Volt batteries, 48V batteries, and can help you pick out the right ones for you. In addition, we have great sales available. Check it out right now.

FAQ

Can I replace my RV battery with a lithium battery?

Yes, Upgrading your battery bank to lithium-ion can be one of the easiest and best updates you can make to your RV. Especially if your rig has high-maintenance wet batteries.

Do RV batteries drain when not in use?

Yes, RV batteries can discharge over time, even when not in use

Should you remove the battery from your RV for winter?

Batteries without functioning in extreme cold conditions can lead to sulfation (for lead-acid batteries) or even freezing. Therefore you should be removed if you are not going to be using your RV for an extended period of time during the winter.