In the case of a power outage, a generator might be a great alternative for supplying backup power to your home.
You may not be able to power everything in your home depending on the capacity of your generator, but you may be able to power the most vital items such as a central AC.
So, through this article, know the about the best size generator which can run your central AC.
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What Size Generator Do I Need To Run Central Air Conditioner?
To run a central AC, you will need a 6,000 to 18,000 watts generator. It will depend on your central ac size.
Let’s see some sizes of the generators based on the capacity to run a central AC.
Generator Watts | Central AC Size |
---|---|
6,000 | 1.5 ton |
8,000 | 2 ton |
12,000 | 3 ton |
15,000 | 4 ton |
18000 | 5 ton |
For small central AC (up to 3 tons) we recommend to use DuroMax XP13000EH Dual Fuel Portable Generator.
And for large central AC (from 4 tons) we recommend using Generac Standby Generator.
How To Determine The Right Size Generator To Run A Central Air Conditioner?

Knowing how to determine the size of a generator is very important. As it can be very problematic if you choose the wrong size generator for your central AC.
AC Unit Size
The size of your central air conditioner is a primary factor in determining the appropriate generator size.
AC units are typically measured in tons, with a 3-ton AC unit requiring a generator with a power output of 8-10 kW.
Climate Conditions
The climate conditions in your area can also impact the power requirements of your AC unit.
For example, if you live in a hot and humid climate, your AC unit may need more power to operate efficiently.
Generator Capacity
The capacity of the generator you choose is another crucial factor to consider.
Ensure that the generator has enough power output to run your AC unit, as well as any other appliances or electronics you may need during a power outage.
Consult with a Professional
To determine the exact generator size needed for your specific situation, consult with a qualified electrician or HVAC technician.
They can assess your AC unit, climate conditions, and other factors to recommend the appropriate generator size and capacity for reliable and efficient operation during power outages.
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How To Choose The Best Size Generator To Run A Central Air Conditioner?

It’s not a good idea to walk into a generator dealer and get the greatest model available without thinking about the pros and downsides. Know the facts to think about.
Make a list
The size of the generator you’ll need is determined by the air conditioner’s make and model, as well as the power needs of each component in your system.
It’s critical to get the right estimate if you want to know how much electricity you’ll need.
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Power Loading Managements

Find a generator size that can start several pieces of equipment if you’re powering other vital home appliances.
Add up the wattage of all the machines you should be running. Then purchase a generator that is more powerful than the combined wattage of the units.
Benefits
The size of a generator should be appropriate for your home’s demands.
In the case of a power loss, it should be strong enough to keep your air conditioner operating for many hours. There are some advantages you should know,
- There will be no out-of-the-blue system breakdown.
- There will be no outages due to data overload.
- Your generator will last longer.
- Consistent results.
- Simple and inexpensive repairs.
- Increased the lifespan of power systems.
- Personal security is ensured.
Types
You should be aware that there are two types of generators available on the market.
- Portable generators are the most popular as they are smaller and lighter. If you’re utilizing a smaller portable generator to power your AC, it won’t be able to power your system.
- Standby or backup generators are a wonderful option if you’re a large user of power because they’re also cheaper and easier to utilize.
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How Do You Calculate The Right Size Generator For Your Central Air Conditioner?

You must know the total possible consumption rate before deciding on the right size generator to run your air conditioners.
The weight of AC is measured in tons or BTUs. You may use this to determine the amount of generator you’ll need to power a central AC.
Appliances
Your appliances can consume a surprising amount of energy. When choosing or looking for a generator, we recommend measuring how much power you’ll need at a minimum.
Most individuals are surprised to learn how much electricity they use to run their homes.
Space
A generator that will readily power one or more air conditioners is usually rather large, so you will need to make certain you’ve got enough room for it.
If you don’t have the correct or enough room for the generator, you could have to settle with a lesser one.
The Use Of Air Conditioning
You must check that the generator can power your central air conditioning.
When picking a generator, keep this in mind and make sure it can power the system and has enough overhead to handle everything.
Usage in General
Sometimes, you can figure out what appliances your generator will need to run thinking about when you’ll need it.
If you want to use your generator during hot weather, keep in mind that you’ll need ACs during those times, while heaters will be required during the cooler months.
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FAQs About The Right Size Generator To Run A Central Air Conditioner
What About The Noise Of The Generator While Running A Central AC?
Every generator creates a certain amount of noise, and some generate more than others. The quantity of noise that some housing zones will tolerate is regulated.
A rubber sheet is a fantastic solution for reducing generator noise. Cover the generator from all sides and you will notice that it makes less noise.
How To Install The Generator?
First of all, check the transfer switch. Then prepare the space, you need to shut off the circuit breaker to your furnace, rewire the system, and install the plug, in the Generator.
Why Are More Powerful Generators Required To Run A Central Air Conditioner?
Air conditioners will need to consume the maximum amount of electricity they can pull regularly to keep the space at the ideal temperature.
This is often usually why you’ll notice that your generator dies more frequently when the weather becomes cooler.
The Bottom Lines
Your generator can and will comfortably power your central air conditioning throughout your house if you purchased and maintained it properly.
Side by side the best size generator can bring a revolutionary change to your home. So, let’s begin your day with the best size generator to run your central AC.