How to Charge RV Batteries with Battery Charger, Generator, Solar etc?

Your RV’s battery is the heart of your electrical system, providing power to all the lights, appliances, and other equipment when you’re camping. For your RV to operate smoothly, make sure your battery is fully charged and in good condition.

If you apply an incorrect method, it may shorten the life of your battery or even damage it. So you want to know how to charge rv batteries with battery charger, generator, solar etc.

In this article, we will discuss the basics of RV battery charging and provide a few tips to help you maintain your battery while on the road.

Easy Guide on How to Charge RV Batteries with Battery Charger, Generator, Solar etc?

There are a few different ways to charge your RV’s battery, and the best way to charge your battery will depend on your type of RV, the equipment you’re using, and your camping style.

Charge RV Batteries with Battery Charger, Generator, Solar etc

Method 1. Charging RV Batteries with a Battery Charger:

Most RVs come equipped with a 12-volt battery charger. This is the simplest and most common way to charge your batteries while on the road. However, there are some steps you should take to ensure that your battery is being charged correctly.

Charging RV Batteries with a Battery Charger

Step 01. Check the Battery:

The first step is to check the battery to make sure it is in good condition. A dead or weak battery will not charge properly, no matter what method you use.

Step 02. Connect the Charger:

Once you have confirmed that the battery is in good condition, connect the charger to the RV’s batteries using the appropriate cables.

Connect the Charger

Step 03. Set the Voltage and Amp:

The voltage and ampere of the charger should be set to the same as the battery. It can usually be found in the owner’s manual or on the charger itself.

Step 05. Turn on the Charger:

Once the voltage and amperage have been set, turn on the charger and let it run until the battery is fully charged.

Method 2. Charging RV Batteries with a Generator:

An RV generator is an important piece of equipment for anyone who enjoys spending time in their recreational vehicle. It can be a great way to charge your batteries when you are not near an electrical outlet.

Charging RV Batteries with a Generator

When using a generator to charge your RV batteries, you will want to make sure that the voltage and frequency of the generator match the requirements of the battery charger. Here is the process of charging an RV battery with an RV generator:

Step 01.  Check the RV Generator Fuel:

If you have already driven your RV many miles, the fuel is reduced. Therefore, you need to check the fuel level before starting the RV generator. If there is no more fuel in it, you have to refill it with diesel or gasoline.

Step 02. Connect the Generator:

After refilling the RV generator, you need to connect it to the campground electrical box by plugging the power cord into a properly grounded outlet. Now, turn on the generator by flipping the switch to the “on” position. The generator will start producing power.

Charging RV Batteries with a Generator

Step 03. Set the Voltage and Frequency:

In order to charge your RV batteries, you will need to set the voltage and frequency of the generator. The voltage should be set to 120 volts and the frequency should be set to 60 Hertz. You can do this by using the switches on the generator.

Step 04. Plug in Your Battery Charger:

Now, you need to plug the battery charger into the generator. The charger will start charging your RV batteries. Make sure that the battery charger is turned on.

Step 05. Monitor the Charge:

It is important to monitor the charge while it is happening. This will help you ensure that the batteries are being charged properly.

When the battery charger is plugged into the generator, it is important to note that the charger will not start charging the batteries until the generator reaches a certain voltage. Once the generator reaches this voltage, the charger will start charging the batteries and will stop when the generator falls below this voltage.

Method 3. Charging RV Batteries with a Solar Panel:

The sun is a great source of power and can be used to charge your RV batteries. Solar panels are a great way to keep your batteries charged while you’re on the road, and they can be installed on your RV or towed behind it.

Charging RV Batteries with a Solar Panel

There are a few steps you need to take to properly charge your batteries with a solar panel:

Step 01: Place the Solar Panel in Direct Sunlight:

The solar panel needs to be in direct sunlight in order to generate power. Make sure it’s positioned so that the sun hits it as directly as possible. The best place for a solar panel is on your RV’s roof, but if that’s not possible, you can install it on the side of your RV or even tow it behind.

Step 02: Check the Voltage of Your RV Battery:

Before connecting the solar panel to the battery, you need to check the voltage of the battery. This can be done with a voltage meter, which you can purchase at most RV stores. The battery should be 12 volts or higher.

Step 03: Connect the Solar Panel to the Battery:

Once you’ve checked the voltage of the battery, you can connect the solar panel to it. Make sure the connections are tight and secure.

Connect the Solar Panel to the Battery

Step 04: Monitor the Battery Voltage:

Once the solar panel is connected to the battery, you need to monitor the voltage. The solar panel will not produce power if the battery is already fully charged, so you don’t want to leave it connected for too long. Make sure to disconnect the solar panel when the battery reaches 12 volts or higher.


  • Make sure that your solar panel is compatible with your battery charger. Some solar panels come with a built-in battery charger, while others require an external battery charger.
  • If your solar panel doesn’t come with a built-in battery charger, you will need to purchase one separately. Be sure to get a battery charger that is designed for use with solar panels.
  • You need to make sure that your solar panel is large enough to provide enough power to charge your RV batteries. The size of your solar panel will depend on the size and type of your RV and the amount of sunshine you get where you live.


There are a few questions that are commonly asked about charging RV batteries. These are some of the most common questions and their answers.

1. Can I Charge Batteries with Solar and Generator at Same Time?

Yes, you can charge your RV batteries with a solar panel and a generator at the same time if you have multiple sources of power. You don’t need to disconnect one source to use the other. It is safe and efficient to run them both at the same time.

2. How Long does It Take to Charge RV Batteries with Generator?

It usually takes about 2 hours to charge RV batteries with a generator. However, the amount of time it takes to charge your batteries will depend on the size of your generator and the amount of power it is putting out.

3. What Size Generator do I Need to Charge My RV Batteries?

If you’re looking to buy a generator specifically to charge your RV batteries, you’ll need to decide what size generator you need. The answer to this question depends on the wattage of your battery charger. You can run 10 amp battery charger with a 600 watt generator. If you have a triple-stage charger, you’ll need a generator with at least 2,000 watts of power.

4. Why are My RV Batteries not Charging?

One possible reason your RV batteries are not charging is that your battery charge health is low. Another possibility is that your converter isn’t working properly. You should also check for corrosion and blown fuses, diodes, and resistors on your circuit board.


Charging your RV batteries can be done in a variety of ways. Every RV must have one or more 12-volt deep cycle batteries to power the house systems. Charging these batteries is necessary for providing electrical power while camping or traveling.

There are three main ways to charge your RV batteries. Each of these methods has its own advantages and disadvantages. You will need to decide which method is best for you based on your needs and what you have available.

If you follow our tips, you will be able to charge your RV batteries using any of the three main charging methods. Remember always to monitor the battery voltage to ensure that your batteries are not being overcharged.