Best RV Deep Cycle Battery

If you plan on using your RV to go on expeditions with your family, your vehicle’s deep cycle battery is going to get a workout. Whenever you use your RV’s appliances or electronics, the deep cycle battery needs to pull through for you.

If you’re like most RV owners, you’ll know how much of a headache a subpar electrical component can be. In this article, we’ll discuss how to pick a deep cycle battery for your RV and give you a few ideas for which batteries might suit your family’s requirements.

What To Look For In An RV Deep Cycle Battery

Deep cycle batteries differ from ordinary vehicle batteries in that they are designed to withstand far more cycles of discharging. In a normal vehicle battery, the battery only needs to discharge to start the engine and power the vehicle’s electronics when the engine is off.

Thus, the total number of discharges doesn’t need to be very high for the battery to perform in the way that the driver expects. 

Once the battery has passed its rated number of cycles, its maximum capacity drops. This means that the features you should look for in an RV deep cycle battery are a bit different than in a typical vehicle battery.

Durability

The durability of deep cycle batteries is frequently lower than standard RV batteries because the internal mechanisms are more numerous and more sensitive.

Many manufacturers incorporate sophisticated battery cell cycling technology into their deep cycle batteries to minimize internal cycling from cell to cell in the absence of demand for power.

To make up for the additional complexity, the best deep cycle battery manufacturers make their batteries with heavier and more comprehensive protective casings.

In contrast, shoddier manufacturers skimp on protective casings, leaving the batteries vulnerable to damage, which can cause dangerous leaks of battery acid.

Given that a battery acid leak in your RV could cause serious damage, you should do your best to find a highly durable battery.

To be clear, you shouldn’t ever be subjecting your RV battery to mechanical stressors or physical trauma. However, it’s better to be safe than sorry, so be sure to look for a durable battery.

Capacity

The capacity of an RV battery is one of the more important features because it determines the length of time that you can power your appliances from battery power alone. Capacity is measured in ampere-hours, which you will see listed as Ah.

Deep cycle batteries run the gamut from around 50 Ah to 200 Ah or more. The important thing to remember is that the more appliances you will want to use at the same time, the more capacity you will need.

If you only plan on running a cooking stove and the lights in your RV, you can probably make do with smaller battery capacity. 

On the other hand, if you want to run several appliances at once and you don’t want to worry about running out of battery power in the middle of the night, a larger capacity battery is a better choice.

Shelf Life

RVs have a reputation for killing batteries. The reason for this is that many RV batteries have high self-discharge rates. When a battery has a high self-discharge rate, it loses its power even when it isn’t being used by any appliances.

As a result, one of the most common issues with RV deep cycle batteries is that they don’t hold a charge between uses of the RV. This is especially true in hotter climates, where high temperatures exacerbate the self-discharge inherent to all batteries.

Aside from the issue of RV batteries dying after periods of disuse, RV batteries also have a reputation for losing their maximum charge capacity rapidly over time.

The best RV deep cycle batteries have shelf lives of around ten years before starting to lose maximum capacity, whereas the worst might only guarantee a year or two of the maximum capacity stated on the box.

RV Deep Cycle Battery Reviews

Now that you’re up to speed on key features in RV deep cycle batteries, we’ll discuss three of our choices for the best RV deep cycle batteries so that you’ll get a few ideas about what you might want to buy when you’re ready to start shopping. 

Best RV Deep Cycle Batteries Under $150

Interstate Batteries 12V 35AH Sealed Lead Acid AGM Deep Cycle Battery

The Interstate Batteries 12V 35AH Sealed Lead Acid AGM Deep Cycle Battery is our choice for the best deep cycle battery under $150 as a result of its easy installation, high cycle rating, and compact footprint.

With this deep cycle battery, you’ll get a huge number of cycles in a tiny box. Because of the battery’s effective instruction guidelines, you’ll never need to worry about accidentally connecting it improperly.

The downside to the Interstate Batteries unit is that its maximum capacity is very small at 35 Ah. While it’s a good choice for people who plan on powering individual appliances, for people with big families, this battery might not have enough capacity to keep the RV engine off.

Pros:

  • The high number of cycles
  • Lightweight
  • Easy to install
  • Good instruction set

Cons:

  • Very small capacity
  • Not highly durable

Odyssey PC680 Battery

The Odyssey PC680 Battery is our second choice for the best RV deep cycle battery for under $150. With the PC680, you’ll get a rapidly-recharging deep cycle battery that’s backed by an ironclad warranty. 

The Odyssey’s predicted service life of 10 years means that you’ll have it in your stable for a long time before it needs replacing. In many cases, you may run out of the rated cycle number before the shelf life expires.

The one thing to watch out for with this battery is that the casing is not as durable as with other deep cycle batteries. This means that if you accidentally damage the case to this battery, it may start to leak battery acid.

Once you have installed the battery, you won’t need to worry about leaks or damages, however.

Pros:

  • Sustains up to 400 cycles
  • Tolerant to very high temperatures
  • Two-year warranty
  • Predicted 10-year service life

Cons:

  • Casing isn’t durable
  • Weak instruction set

Best RV Deep Cycle Batteries Under $250

WindyNation 100AH 12V AGM Deep Cycle Sealed Lead Acid Battery

With the WindyNation 100AH 12V AGM Deep Cycle Sealed Lead Acid Battery, you’ll get a standard capacity RV deep cycle battery with a long shelf life and exceptional durability, making it our top pick for deep cycle batteries under $250.

The WindyNation battery’s shelf life is an impressive 12 years, meaning that if you rarely use your RV, you won’t need to worry about the passage of time as much as you might with a weaker battery. 

The only issue to be aware of with this battery is that its performance degrades more steeply at hot temperatures than you might expect. 

If you plan on leaving your RV in the sun during the summers, you should be aware that you probably won’t enjoy the full rated shelf life of this battery.

Pros:

  • Extremely durable exterior
  • No-spill and no-leak design
  • Minimal self-discharge
  • Shelf life of up to 12 years

Cons:

  • Not suitable for high-temperature operations
  • Difficult installation compared to other deep cycle batteries

Renogy Deep Cycle AGM Battery

Renogy’s Deep Cycle AGM Battery is our runner-up choice for the best RV battery under $250 because of its high tolerance for cold temperatures, 100 Ah of capacity, and easy installation.

When you use this battery for your RV, you won’t need to worry about fractures caused by repeated cycles of heating and cooling. If you plan on using your RV in very cold environments, the Renogy is an excellent choice because it can survive cold starts without any issues.

The battery also has convenient carrying handles which make installation much easier. However, in some cramped RVs, the charging handles may lay dangerously close to the power contacts, so you should tape them down and out of the way to be safe.

Pros:

  • Compact package
  • High capacity
  • Easy-carry handles
  • Easy installation

Cons:

  • Handles may get in the way during mounting in tight spaces
  • Heavy

Best RV Deep Cycle Battery Overall

Weize 12V 100AH Deep Cycle AGM SLA VRLA Battery

Our pick for the overall best deep cycle RV battery is the Weize 12V 100AH Deep Cycle AGM SLA VRLA Battery thanks to its high capacity and long service life. When you use the Weize to power your RV’s appliances, it won’t ever let you down.

The Weize’s capacity is 100 Ah, which is more than enough to use a few different appliances in your RV. With the help of the fast-recharge technology in the battery, you won’t need to run your RV’s engine for very long before the battery is full.

Thanks to the battery’s great instruction set and intuitive interface, you don’t need to be an electrician to safely install and use the Weize in your RV. You also won’t need to perform any maintenance to keep its shelf life at the level the manufacturer advertises.

Our only complaint with the Weize deep cycle battery is that it doesn’t include any mounting gear to secure the battery in place.

Given that not all RVs will even need any additional mounting equipment to fit their battery, it’s plausible that many people won’t be affected by this downside, however.

Pros:

  • Capable of thousands of cycles
  • Fast-recharge technology
  • Small form factor
  • Great performance at high and low temperatures

Cons:

  • Only has standard 100 Ah capacity
  • Mounting equipment not included

Vmaxtanks’ VMAXSLR125 AGM 12V 125Ah SLA Rechargeable Deep Cycle Battery

The VMAXSLR125 AGM 12V 125Ah SLA Rechargeable Deep Cycle Battery is a heavy-duty deep cycle battery that’s equipped with a whopping 125 Ah of capacity. You won’t need to frequently run your RV’s engine to top off this battery.

In terms of its construction, the VMAXSLR125 is extraordinarily durable on the inside as well as on the outside. The internal plates dedicated to protecting battery cycles are heavily reinforced, meaning that this unit has a minimum of self-discharge over time.

The only issue you may find with this battery is that it’s very heavy and very large in comparison to other deep cycle batteries. Thus, you may need to check whether your RV is compatible with its footprint.

Pros:

  • Fumeless discharge for added safety
  • 125 Ah capacity
  • Military-grade construction quality
  • Clearly labeled contacts

Cons:

  • Large footprint
  • Unclear warranty

Charging Up

Picking a deep cycle battery for your RV doesn’t need to be stressful if you follow the guidelines that we’ve described in this article.

When you do decide to make a decision, remember to opt for a durable battery that is rated for a high number of maximum cycles, like the Weize. If you intend to run multiple appliances from your battery, make sure to choose a battery with a high capacity.

On the other hand, if you’d rather have a small and lightweight battery, which can charge an appliance every now and then, the Interstate Batteries option might be right up your alley.