Lithium RV Batteries: Which Is Best for Your RV?

5,285 Published by BSLBATT Jun 03,2024

best lithium battery for rv

With lithium batteries becoming a more common option in RV solar, it can add to the information overload for both dealers and customers alike. Lithium RV Batteries: Which Is Best for Your RV? There are some tips to weigh the benefits of each battery type for your customer and help them make a more informed decision.

If you frequently leave your home to go boondocking all year long, you’d need a battery that will last a long while. You would need one you can rely on even when you’re up in the mountains. You need one that would last you more than three years even if you frequently go off-grid. In short, you need to find a long-lasting battery. And there is nothing better than the best lithium battery for RV.

A good RV, like a mobile home, also needs a battery that can last long on the move. When it comes to picking lithium RV batteries, make sure you get the best type for your RV. Because there are many types of RVs, for example Class B is available in a camper van.

Lithium batteries can last for up to 2,000 cycles. This means if you go camping and charge your battery as often as 100 times in a year, your battery can last up to twenty years! Did that catch your interest? If it did, here are my highly recommended lithium RV batteries for you to choose from.

Why Lithium RV Batteries?

We’ve put together a solid guide to help you choose the best lithium batteries for your RV. First, though, we need to answer the obvious question: what makes lithium batteries the best RV choice, to begin with?

One reason is that these batteries can save you money over a long period of time. Rechargeable batteries save money compared to other resources, and they also offer a ton of convenience. After all, who wants to worry about the power in the middle of your travels?

Benefits of Lithium

Lithium batteries are a popular choice for RVs because they are the best to store extra solar power when an RV decides to install solar for off-grid camping.

Battery Discharge Rate

The discharge rate is low for lithium compared to lead-acid batteries. Due to their low discharge rate, the storage capacity is constant. Lithium batteries can be discharged down to 80% charge or less unlike lead-acid which are around 50%.

Battery Charge and Discharge Speed

Lithium batteries are able to be charged and discharged continuously at high amp rates without causing harm. Lead-acid batteries aren’t able to handle high charge and discharge currents. Those high currents reduce their life cycle and vent hydrogen gas in large amounts putting the battery at high risk of fire.

Lead-acid batteries have three stages to charge and each stage the charge current is lowered. Lithium, on the other hand, is able to handle the same charge all the way to a 100% charge. Thanks to the constant high charge capability it charges much faster.


Lithium batteries are lighter than lead-acid batteries and are able to provide a longer cycle life. They weigh about 1/3 of a lead-acid battery comparable in size. If your battery has to be in the front of your RV and it’s lead-acid you have to be careful if you use lead-acid that you don’t exceed the hitch weight limit.

With lithium, you don’t have to worry about the weight as much which gives you the ability to add more batteries if needed.

Longer Lifespan

The average lead-acid battery is rated for 400 cycles or less, unlike lithium which is rated for 2000+ cycles. It depends on the size of the battery. Thanks to them being able to be discharged it doesn’t affect their lifespan as much as lead-acid is.

Less Maintenance

Lithium batteries don’t have to be periodically checked like certain lead-acid batteries. They don’t have liquid electrolytes that have to be checked and they don’t have terminals that corrode. Lead-acid batteries are famous for needing the terminals cleaned with an alkaline solution to take off corrosion.

No Venting Needed

Lithium batteries don’t vent which means you can store them anywhere in your RV. If you’re installing a whole solar system this is very convenient because you have more options of where to store your RVs without a fire worry like lead-acid. If you want to store them under your bed you can go right ahead without the worry that lead-acid would cause.

Lead-acid batteries vent toxic, acidic vapors when they’re charged and discharged. This means they have to be in an area where the vapors can escape and go outside.


Lithium batteries are not only lighter they are also smaller in size. They take up less space than lead-acid batteries. If you have to fit your batteries in a small compartment the smaller lithium size will make a difference.

Even Discharge

When lithium batteries discharge they maintain their voltage. Lead-acid, on the other hand, loses voltage when they discharge. This makes the lifespan of lithium batteries longer and more efficient.

Lithium batteries have a high-performance quality which is why the Tesla Power Wall Elon Musk designed was around a lithium battery.

To top it off, lithium batteries are safer and longer-lasting. These batteries don’t vent, so you can store them anywhere without worrying about starting a fire. And the average lithium battery lasts 5 times longer than lead-acid batteries, saving you time and money.

BSLBATT best lithium battery for rv

Now that you know more about how and why to choose lithium batteries, let’s review some of the best possible batteries for you and your RV.

BSLBATT B-LFP12-20 – Small and Compact with Excellent Performance

Capacity: 20 AH
Voltage: 12 V
Battery Type: Deep Cycle

The BSLBATT B-LFP12-20 is a popular deep cycle marine battery that has a small form factor but the high capacity of 55 AH. However, this capacity is definitely not the highest we have seen but it is more than usable especially when used in an RV and recreational vehicle(also known as a camper van).

Furthermore, what demarks this RV battery from others is its high CCA value of 750 which shows that it will have absolutely no problem starting the RV in very low temperatures.

Additionally, due to the sealed design of this battery, you are not limited in any way when installing the battery in any position you like.

All in all, if you are looking for a heavy-duty RV battery with a high result capacity as well as excellent resistance to cold temperatures, then the B-LFP12-20 is an excellent model to consider.

Sure, it is not the best RV battery when it comes to capacity but it makes up for it in many other ways.


The B-LFP12-100-LT is a 12V 100Ah lithium battery and is part of BSLBATT’s Low-Temperature Series. This lithium iron phosphate battery is specially designed for cold-weather performance. LT Series batteries can safely charge at temperatures down to -20°C (-4°F) using a standard charger. The system features proprietary technology that draws power from the charger itself, requiring no additional components. The B-LFP12-100-LT is an ideal choice for use in RVs, off-grid solar, electric vehicles, and in any application where charging in colder temperatures is necessary.

Explore the Power of Lithium

BSLBATT LiFePO4 – High Current Output

Capacity: 100 AH
Voltage: 12 V
Battery Type: Deep Cycle

For those looking for the ultimate RV battery, the BSLBATT definitely deserves the title of the best deep cycle RV battery on the market. Indeed, despite only having a capacity of 100 AH, what demarks this RV battery from the rest of the competition is its 200 Amps output.

With such high capacity, this battery will have absolutely no problem powering very power-hungry electric devices like power tools in your RV.

Additionally, one of the great things about this model is it’s 3000 to 5000 recharge cycles which will make this RV battery last a very long time.

Furthermore, the connector studs of this battery are universal so you will have no problem installing it in your RV or for any other application where you want to store electrical current.

Best of all, this RV battery is made in China and built from quality materials that guarantee it to be very durable and long-lasting.



This Slim Lithium Battery 12V might be narrower than what you’re used to, but don’t be deceived. It can hold up an impressive 100Ah capacity and supply you with smooth, uninterrupted power. Featuring an advanced internal battery management system (BMS) and prismatic cells, our BSLBATT slim lithium battery 12V is geared for unrivaled performance and user safety.

100Ah Slim Lithium Battery 12V


12v 200Ah slimline lithium

The 12V 200Ah slimline lithium battery Difference

Although deep cycle batteries may look similar, there are key differences between low-quality offerings often found on online auction sites and premium quality offerings such as the 12V 100Ah slimline lithium battery.

Fits where other batteries cant

For custom installations, our 12V 100Ah slimline lithium battery can fit where others cannot. The slimline lithium battery is designed to fit behind seats, in canopies, or behind drawers, where other batteries cannot.

Built-in Volt Meter

You can easily see the battery charge level at any time with the LCD screen on top of the 12v 100ah slimline lithium battery. Whether it’s daytime or nighttime, the screen is backlit for ease of use.


Are You Feeling Lithium Ready?

Now you know how to select the best lithium RV batteries. Your RV battery can be a quality battery that will give you peace of mind whether you’re replacing the battery for it to drive, for your RV generator, or installing a whole solar setup on your RV lithium will be a great upgrade for you.

Take the points above while you do your homework on your lithium battery options. You want to make sure that the company you buy from also has customer service available to answer your questions.

We specialize in lithium batteries and helping RV owners power their adventures. To hear more about our competitive prices and custom RV solutions, contact us today!

If you want to talk to an expert about the best lithium option for you, please contact us today and we will be more than happy to answer your questions.


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