Best 22KW Standby Generator

It is needless to dwell much on the importance of electricity. We are all aware of that. That’s why we all need a 24-hour power supply. Unfortunately, this is not possible in many parts of the world for several reasons. One major cause of power outages is a natural disaster.

Floods, hurricanes, thunderstorms, earthquakes, and other natural disasters usually cause power outages that could last for days. This is why many homes and organizations now have standby generators as a backup. In fact, power is not stable in many parts of the world, especially in African countries.

Many homes run generators for several hours every day. In recent years, the demand for standby generators has increased dramatically. That’s why its production has increased too.

This review is for 22KW generators. We tested many of them and came up with the five reviewed below. They are the best among them. We took the time to review each of them separately. At this juncture, we must remind you that we’re not affiliated with any of the brands.

We just reviewed their products because we were impressed with their performance. We recommend all of them. If you pick any of them, you’ll be glad you did.

Our Picks of 5 Best 22kw Standby Generators:

1. Generac 7043 Home Standby Generator 22kW/19.5kW

The distinguishing feature of this generator is its app. Once you install the app on your phone, you can monitor it remotely.

Even if you’re in another continent, you can still monitor the generator. This generator can generate an output of 22KW, so it is good enough to power all the appliances in your home easily.

Also, the generator comes with a 5-year warranty. However, it is important that you study its warranty terms and conditions.  It has a dimension of 48 by 25 by 29 inches and it weighs 515 pounds.

From its display unit, you’ll monitor its battery status and maintenance intervals. You don’t have to worry about leaving it outside because it is strong enough to withstand all kinds of weather.

Considering its size, you may think its noise will be unbearable. Conversely, its noise level is very low. Its rate of fuel consumption is also low. The generator is durable and its Amazon rating is 4.6 stars.


  • The generator has an output of 22KW.
  • You can monitor it remotely through its app.
  • Its aluminum body can withstand tough weather conditions.
  • A weight of 515 pounds is fair.
  • The product is assembled in the US.
  • It has a low noise level.
  • You’ll find out about its battery status from its display unit.
  • The generator has a dimension of 48 by 25 by 29 inches.
  • Buyers will enjoy its 5-year warranty.
  • It has an Amazon rating of 4.6 stars.

2. Generac 6551 Guardian Series, 22kW

This is another 22KW generator from Generac. It comes with a 200-Amp transfer switch. It runs on natural gas and liquid propane. You can choose which type of fuel is suitable for you.

It is designed to start on its own once there’s a power outage. It has been certified by UL, CUL, and EPA. Like the one above, this generator comes with a 5-year warranty.

It has a dimension of 25 by 29 by 48 inches. You can also monitor this one remotely.  Its fuel consumption is low and so is its noise level.

The heavy-duty generator weighs 526 pounds. The generator is tough and durable. It can withstand all weather conditions. Its Amazon rating of 3.6 stars is fair.


  • The generator comes with a 200-Amp transfer switch.
  • It runs on natural gas and liquid propane.
  • EPA, CUL, and UL have all certified it.
  • It weighs 526 pounds.
  • Buyers will love its 5-year warranty.
  • It has a dimension of 25 by 29 by 48 inches.
  • The power output of the generator is 22KW.
  • You can monitor it remotely.
  • Its noise level is low.
  • Users have confirmed its durability.

3. Generac 5734 GP15000E

This generator gives out 22.5KW of power. This beast should be able to power all homes. A weight of 373 pounds is great for such a powerful generator. Also, its orange color is quite unique.

It has a dimension of 48.5 by 30.75 by 38.5 inches. The voltage of the standby generator is 120 volts. And its tank capacity is 16 gallons.

Although its electric start is convenient, its recoil start isn’t difficult either. Its low-oil sensor will shut down the system when the oil level is low.

This helps to protect the system. It conserves fuel and also has a low noise level. When you fill the tank to capacity, it can run for ten straight hours at half load.

It comes with two strong wheels that make mobility super easy. We have been able to confirm its durability from its oldest users. Its Amazon rating of 4.3 stars confirms its fantastic performance.


  • The generator can run for ten hours at 50% load.
  • It offers 120 volts.
  • An Amazon rating of 4.3 stars is great.
  • The tank capacity is 16 gallons.
  • The generator is capable of giving out 22.5KW.
  • It weighs 373 pounds.
  • Having an orange color makes it unique.
  • It is rugged and durable.
  • There’s a low-oil shutdown feature in it.
  • It has a dimension of 48.5 by 30.75 by 38.5 inches.

4. GENERAC RG02224GNAX – 22/22 kW, 1800 R

This is a super-heavy-duty generator and its weight of 971 pounds confirms that. It is the fourth Generac product on this list.

That makes it clear that Generac is the king in the world of 22KW standby generators.

It starts up automatically when there’s a power outage. The generator is certified by UL and CUL. The power output of the generator is 22KW.

It runs on liquid propane and natural gas. The dimension of the product is 62 by 39 by 31 inches. Also, it has an aluminum enclosure. So, it can withstand all weather conditions. The noise level is quite low. So is its fuel consumption.


  • The generator has a power output of 22KW.
  • It weighs 971 pounds.
  • It runs on natural gas and propane.
  • The aluminum enclosure of the gen-set makes it tough and rugged.
  • The dimension of the product is 62 by 39 by 31 inches.
  • It is certified by UL and CUL.
  • You can be sure of its durability.
  • Its noise level is low.
  • Also, its fuel consumption is also low.
  • The generator kicks in automatically.

5. Auto Standby Generator,22 LP/22 NGkW

This is the fourth Generac generator. That’s awesome. We must remind you that we’re not affiliated with Generac in any way.

We just found its generators to be awesome and we’re introducing them to the world.

This one also weighs 971 pounds and has an output of 22KW. It runs on liquified propane and natural gas and that gives you two fuel options.

The generator is approved by CUL and UL for its safety. With its aluminum enclosure, it can withstand tough weather conditions. When there’s a power outage, the generator kicks in automatically.


  • The fuel consumption of the generator is low.
  • It is approved by UL and CUL.
  • The dimension of the product is 62 by 39 by 31 inches.
  • It runs on natural gas and propane.
  • The generator has a power output of 22KW.
  • The gen-set weighs 971 pounds.
  • It is tough and durable.
  • The noise level is low.
  • It has an aluminum enclosure.
  • In the event of a power outage, it will kick in automatically.

How Big of a House Will a 22KW Generator Run?

People always ask for the size of a house that a particular size of a generator can run. And we have always given them an estimate. However, these estimates may not be accurate. It is not the size of a house that matters but the total power consumption in that house.

So, it is a good practice to list out the amperage or wattage of all your electrical appliances and add them together. While doing that, you should take note of two or more appliances that will never be switched on at the same time. For example, you can’t switch on your air conditioner and heating unit at the same time. So, in that case, pick the amperage of the appliance with the higher amperage.

That being said, we can say that a 22KW generator can easily power a 3,500 square foot house to a 4,000 square foot house.

How Many Amps is a 22kW Generator Good For?

To calculate the amperage, you need to use this equation – Amp = Watts/Volts

Remember, big generators have two standard voltages and they are 120 volts and 240 volts.

With 120 Volts

Amp = 22,000 watts/ 120 volts

Amp = 183.3 amps.

With 240 Volts

Amp = 22,000 watts/ 240 volts

Amp = 91.67 amps.

How To Start a Generac 22KW Generator?

There are two ways to start this generator. You can configure it to start automatically and manually when there’s a power outage. For automatic starting, you’ll need to install it with an automatic transfer switch. That way, once there’s a power outage, the transfer switch will send a signal that will start the generator.

To start the generator manually, you’ll open it and look at the right side for the control. Press the “Off” button and press the “Enter” button to clear all faults. Then, press the “Auto” button and it will start automatically in 10 seconds. And if it does not start, you’ll have to press the “Manual” button. Your generator should start immediately. After that, press the “Auto” button to enable it to start automatically subsequently.

What will A 22kW Generator Power?

A 22KW generator will power a lot of appliances. With it, you can power your heater or HVAC, air conditioner, dishwasher, washing machine, microwave oven, refrigerator, water dispenser, television, fans, lighting, and many other electrical appliances.

Even in the office, it will power your computers, servers, printers, scanners, and copiers. This is why it is the best option for many homes and offices.

Will A 22KW Generator Run My House?

We can’t just answer the question directly. It depends on your power consumption. To answer the question, you need to list all the appliances that you want the generator to power.

Get the wattage or amperage of each of them. Add them up. If they are not up to 22KW, then a 22KW generator should be able to run your house.

On the other hand, if the total is more than 22KW, you’ll need to remove some appliances. Afterall, it is not likely that you’ll need all your electrical appliances at the same time. So, the answer to the question depends on your total power consumption.

How Much Does It Cost to Install A 22kW Generator?

Generally, the cost of the installation of a 22KW generator begins from $1,500 and it goes up from there. The factors that determine the cost are:

  • Size – The bigger the generator, the higher the cost of installation.
  • Brand – Notable brands cost more to install than obscure or new brands of generators.
  • Distance – The distance between the generator spot and your home matters too. The longer the distance, the higher the installation cost.
  • Service provider – Some installation experts charge higher than others. So, you should compare quotes before making a choice.

What are The Prices of 22KW Standby Generators?

The generators come in different models and sizes. So, they differ in prices. One factor that determines the prices of generators is the brand. Tested and trusted brands like Generac will cost more than generators from new brands.

Nevertheless, the prices of new 22KW generators start from $4,500. You may be lucky enough to run into a used or refurbished one. Its price may be slightly lower.

Buying Guide – How To Choose A Good 22KW Standby Generator?

1. Pick from this list

We will advise you to pick from this list because they have all been tested and we recommend them. Picking from this list will save you the time of searching online from scratch.

2. Pick from Amazon

Many generators of this category are heavy-duty machines that require special equipment to deliver them. Amazon has partnered with big logistic companies that can handle the delivery of any product regardless of its size and weight. Also, Amazon offers great price deals on all its products. So, if a good deal tops your priority list, Amazon is your best bet.

3. Study Warranty Terms

Many 22KW generators come with limited warranties. You need to study the warranty terms and conditions to know what it covers and what it does not cover. This will help you avoid a rude shock.

4. Hire Qualified Technicians for Installation

The warranty on your generator can be voided if an unqualified technician handles it. That’s why you must hire qualified personnel for installation.

If the supplier of the generator has an office in your city, they’re likely to have their installation team. It is better you let them install it. That will give you additional peace of mind.

5. Test it Before its Return Window Closes

Make sure you get your generator installed quickly after delivery. When you discover anything you don’t like about it, you can return it. Conversely, if you wait until the return window closes, you won’t be able to return it.

Final Word

The five generators reviewed above are the best in the market. They are tough and durable, they run on dual fuel, and they give out huge power. Also, their fuel consumption is low, just like their noise level. Hence, we recommend all of them for you or anybody.