How Big of a Generator Do I Need To Run A 5000 BTU Air Conditioner?

DuroMax Generator - How Big of a Generator Do I Need To Run A 5000 BTU Air ConditionerMost households experience power outages from time to time whereas others experience it more often than not. Everyone knows how big of a problem it can be when blackouts happen for a very long time. Everyone knows that it can be quite inconvenient and there are many losses to experience. That’s especially the case, like mention, if the blackout lasts for a really long time.

That’s why it’s important to know what kind of appliances a generator can run. Some generators have limited capacities and can only run a few. On the other hand, there are those that can power the entire household. It all depends on what kind of generator you need and what you need to power. And, also, for what sort of occasion.

So in case you do know what you need to power, in this case it is a 5000 BTU air conditioner. But, you don’t know the size of the generator you need to make it run. There are many different-sized generators that can run different air conditioners so it’s only normal that it is confusing to most people. That’s why this article will answer your question: how big of a generator do you need to run a 5000 BTU air conditioner?

How to Know What Size You Need

There are two possible options to choose from. There is a portable one and a standby generator. The portable one, obviously, you can carry and transport it wherever you want. On the other hand, the standby generator can be installed outside of your home. In this way, you won’t need to transport it. It will always be there where you need it.

So, if you mainly need a generator for your home and you don’t need it for recreational activities, then the standby is the better option for you. Naturally, either of them have both advantages and disadvantages. The reason why the standby ones are better is because the biggest generator has 12,000 watts. In this way, the generator won’t get overloaded even if you run bigger air conditioners.

With standby generators, you won’t need to maintain it a lot. In other words, they are low-maintenance because you won’t need to worry about wattage consumption getting exceeded. You only need to change the fuel every once in a while.

How to use the generator

The XP12000E comes with a lot of outlets and buttons so it might make it look a little bit intimidating. However, considering that this generator also comes with an electric start, there will be no problems with starting it up. A lot of users found recoil starter to be problematic and that’s why electric starter is a lot more convenient and better for most consumers.

All you need to do is to switch over the power selector and select what kind of power you need. Once you do that, you’re going to need to turn the engine switch key and you’ll be good to go. Also recoil starter may not be ideal for everyone because may not be strong enough to work with it and operate it. The XP12000E has a control panel as well and you will notice that there are instructions on how to start it. This is great for those people who have never used a generator before.Or, just never used the one with an electric starter.

Identifying Requirements

In order to figure out the size of generator you need for any type of an AC, the process is really simple. The first thing you need to do is calculate both the starting and running power of a generator that you might want. Make sure that it’s a correct result because it is very important to know the exact power requirements. Check a few times, if needed.

Before deciding on one generator, take into consideration what you might want to run with the generator. It’s a good thing that all generators will be able to run mostly anything, even the really large devices. Now, to know the exact size you need for power up the AC, you need to know the possible consumption rate. You need to know whether you can power an AC with other important electronic devices.

Calculating the Size

Any sort of air conditioner is measured in tons or BTUs and you will be able to find in the owner’s manual of a generator. One ton is considered to be equal to 3,500 watts. One ton is actually 12,000 BTU. So, in this case, 5,000 BTU AC is even smaller than 1 ton. Then, taking everything else into consideration, you will be able to run it with a 2,000 watt generator.

The 5,000 BTU air conditioner is considered to be a room air conditioner as well. Like the name says, it is mostly used in normal households as well without any generators. The 2,000 watt generators are one of the smallest ones and therefore don’t require a lot of maintenance. Also, the result is only supposed to be starting or surge power. In other words, the amount of power you see is the amount of power you need to start a generator.

Keep in mind that almost any air conditioner will be able to be powered with a 2,000 to 3,000 generator. Most likely you won’t find any problems if you purchase any generator in that range. So, if you decide to use other devices at home, you will need to find a generator that can run several devices at once. Then, you should add the starting power of all the devices you might use.

Once you calculate it, try to find a generator that has more wattage than the resulting outcome. In that way, you will avoid any sort of power fluxes that may happen. So, you will also get continuous and steady power. You also won’t need to worry about your air conditioner or appliances getting damaged.

Noise Levels

When you look at the generator’s size, it’s expected to think that it is incredibly loud. However, you shouldn’t fear that. A generator will be considered loud if the noise rate is between 70 and 80 decibels which can be compared to the noise vacuum cleaner makes. All the noise rates of generators are calculated with 23 feet away from it. In this case, the XP12000 produces 72 dBa and it can be considered not too loud. And, especially, when one looks at its size.

Weather Outside

It is very important to also take into consideration temperature and humidity. That is because in cases of high temperature and humidity, you will need more power to start an AC. The power output of a generator will also decrease. So, in other words, you will need a generator with more wattage to run your air conditioner.

The input of all ACs is 35C, or 95F, outside while the inside is 27C or 80 F. The humidity is at 50%. The higher the temperature is, the more power hungry the device is. So, make sure to take into consideration all aspects including the temperature when buying a generator.


Deciding on the right size of a generator for any air conditioner is very important. That’s why we hope you found this article helpful and that it has answered your question. With the right-sized generator, you won’t experience sudden system failures or blackouts because of an overload. Your generator will be able to run smoothly and you will be guaranteed safety.

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