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How to properly Charge RV battery when not in use?

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How to properly Charge RV battery when not in use?

Have you ever pondered how to keep your RV battery charge and ready for use during long storage periods? RV owners must undertake regular battery maintenance if they want to get the most out of their batteries and keep them running for as long as possible.

LFP24-100 24V100Ah LiFePO4 Lithium Battery
LFP24-100 24V100Ah LiFePO4 Lithium Battery

Before you can hit the highway, an important question demands an answer: how on earth do you keep your camper battery charged when it’s not in use? Don’t worry, fellow wanderlust seeker, because, in this captivating blog post, we’re about to unveil the secrets of maintaining a fully charged and reliable deep cycle rv battery, even during those long storage stretches. From unraveling the factors that affect battery discharge to discovering alternative charging options and implementing ingenious maintenance routines, we have the power-packed knowledge you need.

charge and discharge rv battery
charge and discharge rv battery

Why Proper Maintenance Matters for RV Battery Charge

As an RV owner, you rely on your camper battery to power various electrical systems and appliances. Whether it’s providing energy for lights, the refrigerator, or your entertainment devices, a well-maintained lithium battery charger is essential for a comfortable camping experience. Neglecting battery maintenance can reduce Brava lithium batteries life, frequent replacements, and unexpected power outages during your trips.

Factors Affecting RV Battery Discharge

Several factors contribute to rv house battery discharge, and understanding them can help you take appropriate measures to preserve your Battery’s charge.

Standby Power Consumption: Identifying Power Drains in Your rv battery Charge

When your camper battery is not in use, specific electrical systems continue to draw power, leading to a gradual rv house battery drain. Devices such as carbon monoxide detectors, propane detectors, or electronic controls for appliances may consume power even when the RV is not being used. Identifying these power drains and disconnecting or minimizing their usage can help preserve your battery charge.

rv battery for solar
rv battery for solar

Environmental Factors: Temperature, Humidity, and RV Battery Charge


Extreme temperatures, both hot and cold, can have a significant impact on rv house performance and self-discharge rates. High temperatures can accelerate the chemical reactions within the deep cycle rv battery, causing it to discharge more rapidly. On the other hand, freezing temperatures can reduce the Battery’s capacity and ability to hold a charge. Therefore, storing your deep cycle rv battery in a cool and dry place is crucial for maintaining its performance.

RV battery inside
RV battery inside

Maintaining Your RV Battery Charge during Storage

Now that we understand the factors affecting battery discharge let’s delve into the practical steps you can take to keep your rv house charged when not in use.

Disconnect the Battery terminals.

Before storing your RV, it’s essential to disconnect the battery terminals to prevent any power drains caused by standby consumption. By disconnecting the lithium rv battery, you effectively cut off the electrical connection and preserve the Battery’s charge. Remember to disconnect the negative terminal first and then the positive terminal.

Store the Battery in a Cool and Dry place.

Store your Battery in a cool and dry location to minimize self-discharge and protect it from extreme temperatures. A temperature-controlled environment like a garage or storage unit is ideal. Ensure the storage area is well-ventilated and moisture-free, as excessive humidity can lead to corrosion and damage to the Battery.

Get a Trickle charger.

If you have access to electricity at your storage location, consider investing in a trickle charger. A trickle charger provides a slow, steady charge to the Brava lithium batteries, compensating for any self-discharge and ensuring it remains fully charged. These chargers are designed to prevent overcharging, making them safe for long-term use.

Watch the Battery’s level.

Regularly check the Battery’s charge level during storage. If you notice a significant drop in the charge, it’s advisable to recharge the deep cycle rv battery to prevent a deep discharge, which can cause irreversible damage. By monitoring the Battery’s charge, you can take timely action and ensure it remains in optimal condition.

Keep the deep cycle rv battery Clean and restored.

Maintaining the cleanliness of your Brava lithium battery is crucial for its longevity and performance. Regularly inspect the Battery for any signs of corrosion or buildup on the terminals. If you notice any corrosion, clean it with baking soda and water.

Exploring Alternative Charging Options for RV Batteries

While disconnecting the Battery and using a trickle charger are effective methods, there are alternative charging options worth considering. These options can provide additional convenience and ensure your RV battery remains charged when not in use.

Implementing a Charging Routine for Your RV Battery Charge

Creating a charging routine is an excellent way to keep your RV battery in optimal condition. Set a schedule to recharge the Battery regularly, even if you’re not planning an immediate trip. This practice helps prevent deep discharges and ensures that the Battery remains ready for use whenever you need it.

Upgrading Your RV Battery Charge System

If you’re frequently experiencing battery issues or if you’re planning to use power-intensive equipment during your RV trips, upgrading your RV battery system might be a worthwhile investment. Consider switching to a higher-capacity battery or exploring newer technologies like lithium, which offer improved performance, a longer lifespan, and faster charging times.

Integrating RV Batteries Charge Management Systems for Enhanced Performance

Battery management systems (BMS) can significantly enhance the performance and longevity of your lithium rv battery. These systems monitor the batteries voltage, temperature, and state of charge, ensuring optimal charging and preventing over-discharge or overcharge situations. Installing a BMS can provide peace of mind, knowing your Battery is correctly maintained and protected.

Considering Lithium RV Batteries: Benefits and Drawbacks

Lithium RV batteries have gained popularity recently due to their numerous advantages. They offer higher energy density, a lightweight design, and a longer lifespan than traditional lead-acid batteries. Moreover, lithium batteries can be discharged more deeply without damaging their capacity. However, it’s important to note that lithium batteries come with a higher upfront cost, so consider your budget and specific needs before making the switch.

Troubleshooting Common RV Battery Issues

Even with proper maintenance, 12v deep cycle battery rv issues can still arise. Here are a few common problems and their potential solutions:

Low voltage or failure to hold a charge: could indicate a faulty battery or parasitic drain. Consult a professional to test your 36-volt lithium Battery’s health and identify any power drains.

Corrosion on terminals: Corrosion can hinder the 36-volt lithium battery’s performance. Clean the terminals using a mixture of baking soda and water, and apply a thin coat of petroleum jelly to prevent future corrosion.

Sulfation: Sulfation occurs when lead-acid batteries are left in a discharged state for an extended period. Consider using a sulfur or battery rejuvenator to restore the Battery’s capacity.

How Do I Charge My RV Battery?

An RV’s battery is charged when connected to a 120v electrical outlet (like a shore power pedestal at a campground), an onboard or external generator, the motorhome or tow vehicles alternator, or solar power.

Let’s break these down in more detail and learn how to use each method to charge your RV’s batteries.

Power Converter/Charger

Arguably, the most common way to charge RV batteries is through its onboard power converter or a battery charger when hooked up to a 120v electrical outlet, like on a shore power pedestal at a campground.


Another fast way to charge your RV batteries is with an RV generator, whether an onboard generator or a portable generator.

Vehicle Alternator

Another option is to charge your RV batteries while driving using the alternator on your truck, or any tow vehicle, with a 7-pin travel trailer plug.

Solar Power

The sun is a free and convenient energy source, allowing you to charge your RV batteries and operate electrical devices without needing a generator or anywhere shore power isn’t accessible.


Tips for Maximizing RV Battery Life

To prolong the life of your RV battery, keep these tips in mind:

Avoid deep discharges: Deep discharges can shorten the Battery’s lifespan. Recharge the Battery before it reaches a critically low level.

Limit high-power usage: Excessive power-intensive devices can drain the Battery quickly. Use energy-efficient appliances and be mindful of your power consumption.

Regularly inspect and clean the Battery: Perform routine inspections to check for corrosion, leaks, or any signs of damage. Clean the 36 volt lithium battery terminals and keep them free from debris.

Avoid extreme temperatures: Extreme temperatures can affect 24-volt battery performance. Park your Brava lithium RV in a shaded area during hot weather and use insulation or heating devices during cold weather.


To ensure your 12-volt RV battery remains charged and ready for your next adventure, practice proper maintenance techniques such as disconnecting the terminals, storing it in a cool and dry place, and utilizing trickle chargers or alternative charging options. Monitor the Battery’s charge level, keep it clean, and consider upgrades like lithium batteries or battery management systems. With these steps, you can maximize your Battery’s lifespan, avoid power outages, and confidently embark on memorable journeys. Safe travels, and may your 24-volt RV battery always be ready to power your adventures!

how to connect a solar panel to a battery and inverter diagram
how to connect a solar panel to a battery and inverter diagram

FAQs (Frequently Asked Questions)

Do the RV batteries charge when plugged into shore power?

Yes, under a couple of conditions.

The first is simple: is the battery disconnect switch (usually located very close to the battery, either in a compartment or next to the battery) set to “off?” If the disconnect is off, then no amount of head scratching will help the batteries take a charge. Until you turn the disconnect switch, that is. You’d be amazed at how often RVs get brought in to dealerships for this simple problem. Frequently the issue is that the RV owners are new or didn’t even realize there was an in-line disconnect that needed to be considered. 

Next: is your RV receiving enough shore power to handle all of the power requirements and still have enough left over to charge the batteries?

For example, suppose you have a small 1500 Watt generator running your RV, and the air conditioning is cranked up in August while your niece is using a hairdryer for an hour. In that case, there isn’t enough power left over for the converter to send to the batteries.

Luckily, the converters we have nowadays are automatic. It takes no effort on your part to redirect power to the batteries when there is a break in power draw.

Will an RV converter work without a battery?

This one is still a hotly debated topic online. The easiest way to find out is to plug your RV into shore power, turn on some lights, water pumps, and other twelve-volt systems and then turn off the battery disconnect switch that we mentioned earlier.

What you’ll find is that nearly everything still works fine. So no, you don’t need to have a battery installed to use most of your 12V systems.

There is a caveat to that statement: motors with extremely high 12V current demands, such as slide-outs, don’t always function without a battery being installed. The reason is that some motors require more current than a typical power convert can deliver at once. The battery, on the other hand, is designed to output power in a larger dose.

Plenty of RV slide-outs can function without a battery. If yours can’t, it will typically be listed in the documentation that came with your rig or even via a sticker somewhere near the switch to operate the slide-outs. 

Feel free to contact us if you have any further questions or need assistance with your RV battery or related topics. Happy travels, and enjoy the freedom of the open road with a fully charged and reliable RV battery!

How to Properly Use an RV Battery Disconnect Switch

Also known as: What is this thing, and when should I use it?

An RV battery disconnect switch is an essential feature for any vehicle with a house battery. Performing a single action (usually a twist) allows you to easily and quickly disconnect the main RV circuit from the battery, protecting not only the battery but also other electrical components of your RV.

This switch is typically located in close proximity to the battery itself, either in its compartment or in a nearby maintenance bay. This switch is often overlooked or even forgotten, buried behind stacks of gear inside a storage bay. 

Batteries have the unfortunate tendency to slowly discharge over time, even if the appliances they’re attached to are turned off. While turned off, electrical appliances still draw tiny amounts of energy passively in preparation for startups. Wiring itself also drains power slowly. This type of energy loss drains at least some charge from your battery and can ultimately result in a dead battery precisely when you don’t expect (or need) it.

When to use an RV battery disconnect

Understanding when to use an RV battery disconnect is necessary if you own an RV. When dealing with electronics, you should always take the necessary safety precautions, so you don’t cause any damage or risk injury.



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