Best RV battery

Best RV Battery – Reviews and Guide 2020

The reason why deep-cycle batteries are used for campers are same reason why they’re so important. It is for the singular reason of powering the 12-Volts system which all the appliances in the RV operate on. Some other types of batteries are also able to handle that but deep-cycle is best suited for it because it can power appliances for long time after starting the vehicle.

Advantages of using deep-cycle batteries for RV

  • The deep-cycle battery will afford your RV, the luxury of lasting long before becoming drained. So in the absence of any power supply to power the deep-cycle battery, be rest assured it’s gonna cover a great distance of your trip before it becomes completely drained and will require recharging.
  • The deep-cycle battery is able to comfortably power the numerous appliances inside your RV ( showers, refrigerators, electric furnace, dehumidifiers, microwave ), much more than any other battery will for a long time.
  • In the most common deep-cycle battery called the AGM battery, its electrolyte is contained in a sealed container ensuring it never leaks out of the battery. Something very common among other non-deep-cycle batteries.
  • These AGM battery type of deep-cycle battery is maintenance free. This is because the eletrolyte can not be able to freeze due to it being sealed in a safe container. Extra bucks saved.

How the deep-cycle battery works?

Before I get to tell you how it works I’ll let tell you the internal parts of the deep-cycle battery. They are:

  • The battery walls ( are thick walls and built with antimony alloy in order to make it corrosion-resistant).
  • Two electrodes ( the positive electrode contains Lead acid whereas the negative electrode contains Lead Dioxide).
  • A dilute Sulfuric acid which serves as the electrolyte of the deep-cycle battery.

The two electrodes and electrolyte play useful roles in galvanization.

Now, let’s get to the part of describing how it works. Now the whole configuration is founded on the basis of electrochemistry or electrolysis; The deep-cycle battery has two electrodes and like we had indicated; one is made of Lead acid while the other is made up of Lead Dioxide. Now the two are deeped inside the Sulfuric acid which is the battery’s electrolyte. The electrodes cause a chemical reaction that generates electricity. Now, the deep-cycle battery is just another lead-acid battery able to cyclically discharge and charge current. This lead-acid battery operates on the basis of galvanisation; process of generating electrical energy through chemical reaction.

What to look out for when buying battery for an RV?

So you must have been thinking of finally nailing that RV battery that you’ve been saving so long to buy. Well now you have the money you’re confused on what RV battery to pick. We won’t make the choice for you, however we’ll try to expose you to some factors that will greatly influence you in picking the right battery for your RV.

  • Portability: Most deep-cycle batteries are portable and light in weight. If you want a battery that won’t be heavy to remove as well as install then pick your choice among other deep-cycles in battery stores around town. WindyNation 12 Volt Deep Cycle RV Batteries is actually portable enough for whatever purpose you may have. How frequently you travel: If you travel frequently, then a deep-cycle battery should serve you comfortably. Otherwise a marine battery can do you well.
  • Your locality: different batteries suit different terrains. So if your locality has got rough, or rocky terrain, Odyssey PC680 Battery is ideal for your camper. Or if your area is fond of getting colder than -10 degree centigrade then you get AMG deep-cycle battery whose electrolyte is saturated and so resistant to spillage or freezing.  For cities in the equator which can get extremely hot, AMG deep-cycle batteries are as well recommended.
  • Installation or mounting or installation process: most campers come with RV marine batteries which are like hybrids of starting batteries and deep-cycle battery. Most likely you wanna replace this hybrid with a better deep-cycle battery, in that case get one with big amp hour ratings. Ensure you get two new batteries of the same brand, age and capacity and install both at same time.

Losen the screws of the positive and negative battery clamps in the old battery. The positives are usually black in color while the negatives are white. Negative clamp is usually unscrewed before positive. Note: that while replacing the battery, to avoid short circuits those two clamps are normally the last to be screwed.

Install the new batteries in their new positions and fix them in parallel to one another ( positive connects to positive while negative connects to negative ). The Camper’s positive lead should be joined with the first battery’s positive line. Afterward, join the two positive posts using charger wire, also fasten their clamps. Perform in the same manner for the negative posts. Battery’s negative lead is joined with first battery’s negative end. In doing these, it is wise to use a new charger wire that is not smaller than the old charger wire.

To prevent the rise of Hydrogen it is important to provide adequate air around the battery. When you don’t do this and Hydrogen level rises, it can cause ignition and subsequently, an explosion. So always maintain enough ventilation around the battery.

Types of batteries for your RV

Technically, the RV has two different types of battery that serve different purposes; the starting battery which is the same battery used in small-sized vehicles, however this RV’s starting battery has bigger CCA (Cold Cranking Amps) rate simply because the RV operares on a bigger engine. Now, this starting battery serves the purpose of starting the RV and its usefulness ends there. Now the RV’s other battery called house RV battery is responsibly for powering all the appliances inside the motorhome as well as keeping the RV running after the period of “starting” the vehicle.

Batterty for an RV

So essentially, the RV uses two types of batteries:

  1. Starting battery.
  2. House RV battery ( otherwise called deep-cycle battery).

Marine battery: RV battery makers attempted to unify the starting battery and the house RV battery so RV owners can have one battery that serves two purposes; the marine battery is a product of that attempt. As with many hybrids, they are not too good in RV starting nor in the deep discharging accustomed to the deep-cycle / house RV  batteries. It is not ideal yet for an RV, but its major advantage is that it is much more a less expensive battery than the deep-cycle battery.

Some Frequently Asked Questions ( FAQs)

What is a battery?

A battery is an appliance used to store electrical energy. Countering ignorance; batteries do not generate electricity they merely store them. These electric current are thereafter transferred to another device that requires electricity to work.

What is lifespan of battery?

Lifespan of deep-cycle battery is heavily dependent on some factors. Namely;

  • How it is used and charged.
  • Maintenance.

In otherwords, big capacity deep-cycle batteries can have very short lifespan when misused and mismanaged and small capacity ones can last as long as they should when handled right. However, we’re gonna give an approximate after running little research and statistics.

  • Starting battery: 3 – 12 Months.
  • House RV battery or deep-cycle battery: 4 – 8 years.
  • Marine battery: 1 – 6 years.
What is AMG battery?

This type of deep-cycle battery is the most recent as well as the best RV battery. This battery has Absorbed Glass Mats (AGM) in the middle of the plates. Well-known AMG deep-cycle battery brands include Fullriver Battery, Concorde SunXtender, and Universal Powergroup. These batteries are able to handle more misuse than anyother type of deep-cycle battery. Their mats are over 90% saturated, ensuring that their acid do not overflow even when ruptured.

What is the best RV battery?

The reason why AGM’s are the best deep cell battery for RV and are much more preferred over gelled or flooded deep-cycle batteries is because their electrolytes cannot spill when spoilt. And since they poise no dangers they cost less for shipping. And since their electrolytes are saturated, this kind of deep-cycle battery is not prone to freezing.

Also there is very minimal water loss. And have very low discharge rate of about 1% monthly; meaning that over months they’re able to retain their charge without being used.

Another advantage it has is that it requires very minimal maintenance. Just too many advantages for the best RV battery around.


Deep-cycle battery are simply lead-acid batteries able to cyclically power an automobile. Because they repeatedly discharge their current deeply and also go through charging, they are hence used to power RV appliances.

The major benefit of deep-cycle battery is its ability to offer consistent power to all the appliances inside the RV in the absence of an alternative power source for a longer period of time.

The best battery for RV in markets are the AMG deep cycles, because they’re the cheapest to maintain and can function in extreme weathers. And also because their electrolytes do not spill due to firm enclosure.

Andrew Wheaton

Hey! I have been fond of the topic of RV for more than 5 years. I have experience in the features of life on wheels. I'm a member of various RV communities and support communication with people who living in RV full time. I hope my articles will be useful to you.

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