What Size Generator is Best For RV With Two AC Units

Ah, the joys of having air conditioning while camping. It can be such an awesome treat and one that we can quickly become accustomed to! So much so that your current RV has 2 AC units! I get it, mine has three!!

But what if we are without power and want to run it off our generator? What size generator will you need to power to AC units?

The quick answer is it depends.

I know, not the answer you wanted but there are several factors to consider. In general, if your RV has two AC units, it’s safe to assume that they will consume a combined total of 3000 to 4000 watts.

Having a properly sized generator is necessary to be able to run both AC units so that you can stay cool and comfortable. Depending on the age, brand, and model of your RV, along with the type and strength of each AC unit, the size of the generator you need will vary.

In this article, I will discuss what size generator to use and how to determine which one is right for you. So, let’s get the ball rolling!

What Size Generator Do I Need For Powering 2 RV Air Conditioning Units?

The size generator you need for powering two RV air conditioning units depends on the wattage needed to run each unit. Generally, a 6,000-watt generator should be sufficient for powering two RV air conditioners but it’s advisable to check the manuals of both units beforehand and make sure that your generator has enough power to properly run your air conditioners. Additionally, you may want to consider purchasing a larger size generator if you plan on running other appliances along with the A/C units. That way, you can be sure that your generator will have enough power to handle all of your appliances and devices.

It’s also important to factor in the startup wattage requirement of your RV air conditioners. This is the amount of additional power required when the A/C units first start up before settling into a steady state of operation. Many generators are rated for their running watts but not for their starting watts. Make sure you know how much power each of your A/C units will draw at startup so you can select a generator with enough power to meet their requirements.

Finally, be sure to check the voltage output of your generator. Most RV air conditioners run on either 115V or 230V AC, depending on the model and size. Ensure that the generator has the correct voltage output for your A/C units.

By taking these factors into account and doing your research, you can choose a generator that will provide enough power to safely and efficiently run your RV air conditioners. Good luck!

How Can You Measure the Power Consumption of your 2 AC Units?

Measuring the power consumption of your RV air conditioning units is an important step in selecting the right-sized generator to power them. To measure the power draw of each AC unit, you will need to use a watt meter. This device connects between the outlet and the appliance, measuring the current and voltage being used by the AC unit as it runs. The watt meter will then display the power consumption in watts. Make sure to measure both A/C units and record the highest wattage of the two readings for accurate generator sizing. Additionally, be sure to measure the startup wattage as discussed earlier, so you can make sure your generator has enough power to handle their load at startup.

Once you have the wattage readings for both AC units, you will be able to calculate the total power draw of your air conditioners and select the appropriate generator size. With this information, you can rest assured that your generator will have enough power to keep your RV cool and comfortable.

Note: It’s important to note that the power consumption of an AC unit can vary based on several factors, such as the size of the AC, the age of the AC unit, and the efficiency of the unit.

Recommended Article: How to Run RV AC Without A Generator?

What Are The Different Types of Generators?

Several different types of generators can be used to power RV air conditioners, each with its own advantages and disadvantages. The most common types of generators include portable gasoline-powered, diesel-powered, propane-powered, and solar-powered models.

Gasoline-powered generators

The most popular type and tend to be the most affordable option. They are relatively easy to use, portable, and offer a good balance of power output and efficiency. However, they can be noisy and require regular maintenance to keep them running smoothly.

Diesel-powered generators

Tend to be more powerful than gasoline models but they are also larger and heavier, making them less portable than gasoline generators. They also require more regular maintenance and can be quite noisy.

Propane-powered generators

A great option for RVers because they tend to be quieter, more fuel efficient, and don’t produce as much carbon monoxide as gasoline models. However, they have limited power output compared to other types of generators and require a propane tank, which can be bulky and inconvenient.

Solar-powered generators

Increasingly popular among RVers due to their efficiency and convenience. They are also quieter than other types of generators, however, they tend to have limited power output and require lots of sunlight in order to generate enough power for powering an AC unit.

Ultimately, the type of generator you choose will come down to your own needs and preferences. By understanding the different types of generators and fuel sources available, you can make an informed decision on which one best suits your RV.

Good luck with your selection!

What are Portable Generators

What Are Portable Generators

Portable generators are a convenient and efficient way to generate power for your RV. They provide the freedom of being able to move them around, making them ideal for camping, tailgating, and other activities that require temporary power. Portable generators come in various sizes and are powered by either gasoline or propane.


  • Portable generators are a popular choice for RV enthusiasts because they are smaller, lighter, and more affordable than stationary generators.
  • The main advantage of portable generators is their convenience and portability. They are relatively inexpensive, making them a good option for those on the go.
  • Portable generators are easy to store and transport, making them a good choice for RV owners who travel frequently.


  • They are not as powerful as stationary generators, so they may not be able to run both AC units in your RV simultaneously.
  • Portable generators can be noisy and emit fumes, which can be a problem in populated areas.

Related Articles


When it comes to powering RV air conditioners, there are a variety of generator options available. Gasoline-powered generators tend to be the most popular and affordable option; however, diesel-powered, propane-powered, and solar-powered models may also offer advantages depending on your needs. Ultimately, the type of generator you choose will come down to your own preferences and requirements. Taking into consideration factors such as power output, portability, efficiency, and maintenance can help you make an informed decision about which one best suits your RVing lifestyle. With careful research and planning you can find the perfect portable generator for all your recreational vehicle needs!