Home » Other » Top 10 Best Whole House Generators To Buy 2020

When you buy through links on our site, we may earn an affiliate commission at no cost to you.

Top 10 Best Whole House Generators To Buy 2020

If you’ve ever had to survive a power outage, you would know the value of a whole house generator. These devices are the best alternative energy source for all your appliances. And it’s not just you; multiple businesses and industries make use of these generators.

But generators require a lot of maintenance and are quite fragile themselves. And if you find that your generator has reached its limit, then it’s time for a replacement.

But wait, which generator is the best, given your circumstances? We’re here to help you find out.

Read on to learn more about buying generators, and our top picks for the best whole house generators.

Comparison Table

ProductsWattageMaterialCertificationsPower SourceBatteryBattery IncludedWeight
Wattage
22000 watts
Material
Aluminum
Certifications
None
Power Source
Natural Gas
Battery
Generac Model-7037 & 5819
Battery Included
No
Weight
458 lbs
Wattage
10000 watts
Material
Metal
Certifications
EPA &  CAR
Power Source
Gasoline & Propane
Battery
Tender
Battery Included
No
Weight
249 lbs
Wattage
20000 watts
Material
Steel
Certifications
None
Power Source
Natural Gas & Propane
Battery
Group 51
Battery Included
No
Weight
500 lbs
Wattage
20000 watts
Material
Aluminum
Certifications
None
Power Source
Natural Gas
Battery
Generac Model-5819
Battery Included
No
Weight
446 lbs
Wattage
15000 watts
Material
Steel
Certifications
CSA & CARB
Power Source
Natural Gas
Battery
Model- GP7000E
Battery Included
Yes
Weight
373 lbs
Wattage
20000 watts
Material
Steel
Certifications
None
Power Source
Propane
Battery
Model-540 CCA
Battery Included
No
Weight
252 lbs
Wattage
11500 watts
Material
Steel
Certifications
OSHA, CARB & EPA
Power Source
Natural Gas
Battery
Model-9500DF
Battery Included
Yes
Weight
82 lbs
Wattage
12000 watts
Material
Steel
Certifications
EPA & CARB
Power Source
Gasoline
Battery
12V Battery
Battery Included
Yes
Weight
206 lbs
Wattage
22000 watts
Material
Aluminum
Certifications
OSHA, CARB & EPA
Power Source
Natural Gas & Propane
Battery
Generac Model-7037 & 5819
Battery Included
No
Weight
515 lbs
Wattage
12000 watts
Material
Metal
Certifications
EPA & CARB
Power Source
Natural Gas & Propane
Battery
1 Nonstandard
Battery Included
Yes
Weight
236 lbs

Top 10 Best Whole House Generators Reviews

1 Generac 7037 Standby Generator

The Generac 7037 is truly a modern touch to old generators! This is an automatic standby generator, which is one of the best features in this generator.

This generator gives 22 kW, which is perfect for daily household electric chores. The generator has a g-force engine. This technology gives a pressure-lubricated engine.

How does it help?

This feature allows the engine to have a smoother and more capable flow of electricity. It also allows fewer interruptions and lesser maintenance hours.

Here’s more…

This generator is much quieter than the traditional ones. The low RPM consumes less fuel. Speaking of fuel, you may connect this generator to regular gas at your place, and you are good to go.

It looks modern, but does it reach the standards?

There are plenty of different smart controls that you may make use of. There is an LCD display in several different languages. This display will help you check the battery, maintenance, and other details to show how well your generator is.

There is also a mobile way to get that display. Simply download the application on your smartphone or tablet and access information.

Want more?

You may also start your generator with the app. Also, you may connect to a maintenance professional for better support.

Features sound good, but what about the body?

The body of this generator is tough aluminum. The proper enclosures are rhino coat powder. This feature allows the body to have resistance to corrosion, rust, and weather.

Generac 7037 Standby Generator
Our rating:3.3 out of 5 stars (3.3 / 5)

Pros

  • Smart features allow easy access.
  • Regular gas connection.
  • True power makes it suitable for sensitive electric devices.
  • Rhino coat aluminum enclosed body.
  • Quieter than regular ones.

Cons

  • Does not have overload protection.
  • No auto shut down.

2 Duromax XP10000E Portable Generator

Do you know what is better than a regular generator?  A portable generator!

The Duromax portable generator is an example of the best whole house generator that is also portable. There are many different features in this generator. It is conventional with a couple of modern twists.

Are you ready to see them all unravel?

Let us begin with the fuel type. The generator runs on gasoline. The tank capacity is about 8.3 gallons, which makes the run time around 10.4 hours on half the load. Read on to know what the load it can take.

The powerful engine is 18HP and 440 cc OHV engine. This engine speed gives off 3600 RPM. This means that this generator will give about 10,000 to 8000 running watts.

Still, confused?

All these features allow your air conditioner, generator, and other heavy appliances to run on this generator smoothly. To ensure safety, you may also choose the power. Between 120V and 240 V, you may control the power.

The body of this generator is an old design. However, there are wheels on it. The features allow it to have easy mobility, which makes it perfect for people on the go.

Here’s the best part…

It is resistant to surge. Do you hate the feeling or generators surging the power? Well, this generator helps keep the electricity at a full flow without surging.

To wrap it all up, this power generator is EPA and CARB compliant. This allows you to run this generator as backup without being guilty of ruining the environment.

Duromax XP10000E Portable Generator
Our rating:3.8 out of 5 stars (3.8 / 5)

Pros

  • The generator can run heavy loads of electronic devices.
  • Power surge resistant feature.
  • 4 hours on half load running time.
  • Easily mobile with wheels.

Cons

  • The generator is very loud.
  • Heavy to move about even with mobility features.

3 Kohler 20 RESCL – 200SELS Standby Generator

When you hear of heavy electric appliances, there is less to no chance that you do not hear Kohler. Kohler is a reliable brand that helps in many electric needs. And with this generator, you may run the whole house.

Since this is a standby generator, it takes about 10 seconds to power your house in case of an outage. The generator is 20,000 watt, which helps in this. There is only a 5% harmonic rate in this generator. This feature allows sensitive electronic devices to have safety with this generator.

What is the fuel type?

Just like any modern generator, the fuel on this is regular house gas. It is easy to connect and helps keep the system on standby.

The Kohler command engine allows this generator to run smoothly. The engine helps it be exclusive for high power electronics. It also helps them run at the same time smoothly.

You know how generators usually emit a lot of heat? Well, this generator has an inbuilt air cooler. The body of this generator is also safe. The corrosion resistance enclosed body allows better safety and durability.

Sometimes standby generators take time in switching to regular electricity. Yet, with this generator, there is no hassle. You may simply on the switch of a button, revive to natural transfer.

Pack this with 5 years of warranty, and this generator takes up all your worries.

Kohler 20 RESCL – 200SELS Standby Generator
Our rating:3.9 out of 5 stars (3.9 / 5)

Pros

  • Can hold heavy appliances loads.
  • Takes just about 10 seconds to give electric backup.
  • Runs on home gas.
  • Corrosion-proof body.
  • Air-cooled to keep it cool and safe.
  • Noise proof.

Cons

  • There no smart options in this generator.
  • Maintenance is not very easy.

4 Generac 7033 Standby Generator

Generac is a safe and reliable brand that has generators for almost every place.

First thing first, the 11000 Watts allows major loads on the generator at once without a lot of surges. The fuel uses its natural LP or gas at home. The connection is easy, and it helps the generator remain on standby as long as you have gas at your place.

But how long does it take to give power supply?

Well, this generator needs just a couple of seconds to give you power supply. When you want to revert to regular supple, all you have to do is push a button. This feature makes it very easy to operate that even a child can do it.

Here’s more…

The engine of this generator is the g-force engine. This is a strong engine that helps in keeping the power supply smooth and reliable. The engine also requires less frequent maintenance.

In addition to that, there is a True power technology in this generator. This exclusive technology gives only 5% or even less harmonic power. Hence, all your sensitive gadgets like mobiles and tablets remain safe!

But does this generator pass the test of noise?

Since the RPM runs at a lower level in the initial minutes of the generator, the generator remains quiet. If you compare it to a traditional generator, it is almost silent.

Generac 7033 Standby Generator
Our rating:4.1 out of 5 stars (4.1 / 5)

Pros

  • Great for heavy load at homes.
  • Reliable and smooth engine with fewer maintenance requirements.
  • Quiet generator.
  • LP gas connection.
  • Air cooling

Cons

  • Takes a little while to kick in.
  • Not portable at all.

5 Generac 5734 GP15000E Portable Generator

Here we have another generator by Generac. This time it is not a standby generator. It is a portable one with a traditional body.

The generator delivers 15000 watts of power. This feature makes it perfect for the household. The power allows almost all types of appliances to run on it without any problems.

The engine is an OHVI engine. This type of engine requires minimum maintenance and adds a lot of years to the life of the generator. It also helps in keeping the hassle-free generator at your place.

So what is the fuel type on this generator?

Well, this generator uses gasoline. There is a 16-gallon tank. With this amount, the generator can run for 10 hours on half the load.

To help the fuel last longer, there is automatic idle control. This feature also helps in making the generator less noisy.

A gauge helps in ensuring that you are up to date on the amount of gas that is left. This generator has several safety options as well. Here are they;

There is an auto-shutdown when there is not enough oil. This protects the generator and the house from short circuits.

Let us also talk about the body.

The body is all metal. A traditional hefty and strong design! Yet, there are all-terrain wheels for better mobility. Backed with two years of warranty, this generator is a pretty great option for home and travel.

Generac 5734 GP15000E Portable Generator
Our rating:4.4 out of 5 stars (4.4 / 5)

Pros

  • Relatively quiet.
  • Less maintenance required.
  • 16-gallon tank for 10 hours on half load.
  • Wheels for portability.
  • Auto shutdown in case of low oil.

Cons

  • Very heavy makes mobility difficult.
  • Does not work on more than one heavy appliance.

6 Briggs & Stratton 40445 Standby Generator

Even though the Briggs & Stratton generator is a modern look, does it have all the modern features? Let us break it down to know what it holds for us.

One of the best things about this generator is that it is good for small homes as well. You may install this generator close to home without worrying. It is a compact design but gives big power. With up to 8000 watts of power, this generator will run your daily household appliances easily.

Want to know about the engine?

The commercial Vanguard engine helps in providing smooth electricity running through simple and a few heavy load appliances. As far as the fuel goes, you can connect this generator to your LP. Simple home gas allows standard backup.

But how does a small generator give such mighty power?

The symphony 2 power management is the magic here. It helps in ensuring that you get the best power in a small generator.

The transfer switch is a 50 amp switch. You may easily switch back to regular electricity as well.

The body is Galvanneal steel, which is highly durable. It keeps the generator’s internal parts safe and out of reach for regular people.

Back this generator up with 5 years of warranty, and you have the complete package! A small standby generator that will make power failures more bearable!

Briggs & Stratton 40445 Standby Generator
Our rating:3.3 out of 5 stars (3.3 / 5)

Pros

  • The generator is installed near your place safely.
  • It uses the low pressure of home gas.
  • The vanguard engine helps in smooth electricity flow.
  • High durable body of steel.

Cons

  • Very loud.

7 Westinghouse WPro8500

Westinghouse Wpro8500 model is rated at 8,500 watts and can peak at up to 11,500 watts. We chose the Westinghouse WPro8500 for its high power output and efficient production.

Firstly, speaking of the power output, the Westinghouse peaks at 11,500 watts. Given the price range and quality, this power output is optimal. It’s enough to power up a regular-sized house or apartment.

Secondly, this Westinghouse generator uses a special Westinghouse OHV 457cc engine. This Overhead Valve Engine is able to consume up to 6.6 gallons of fuel. And to know when the fuel is low, the generator features a fuel gauge.

With a full tank, the Westinghouse WPro8500 can run for up to 17.5 hours. To facilitate easy startup, it features a remote start with a key fob. When you finally get this generator running, it can produce up to 48 amps.

What’s more?

Although the average amperage is closer to 35 amps, the frequency of the AC voltage has less than 5% Total Harmonic Distortion. This means that you get an uninterrupted supply of voltage.

For healthy maintenance, the Westinghouse features an automatic shutdown when the oil is low. Along with that, the generator is able to maintain itself when idling.

Westinghouse also backs up its safety claims through its OSHA, EPA, and CARB certification. These are all safety standards that ensure security when handling heavy machinery.

To further protect you from electric shocks, this generator features a full-panel GFCI. This includes four 20 amp outlets, one 30 amps outlet, and one 50 amps outlet. It also features two 5V ports for USB cables. This increases the number of devices you can attach to the Westinghouse WPro8500.

Westinghouse WPro8500
Our rating:5 out of 5 stars (5 / 5)

Pros

  • Higher fuel capacity.
  • Comes with accessories.
  • Little to no THD.
  • OSHA, EPA, and CARB
  • Protects from electric shocks.

Cons

  • Very low weather resistance.

8 A-iPower SUA12000E

The A-iPower SUA12000E combines innovation with quality standards. It features a larger capacity, powerful engine, and GFCI protection. The starting wattage of this generator is 12,000 watts, and the running power is 9,000 watts. The engine and the entire generator body are made of 100% steel.

Beginning with the engine, the A-iPower uses a 459cc engine. This engine can deliver up to 12,000 watts and is perfect for powering construction sites and offices. It can be used in your home to power, even heavy appliances like ACs and refrigerators.

However, the runtime is quite low, reaching a peak of 9 hours at half the load. This means you need to refuel the generator quite frequently.

Speaking of the fuel, this generator has a tank capacity of 7.0 gallons. And it features a fuel gauge to alert you when the fuel is too low. To avoid electrically shocking the users, the A-iPower has GFCI protection on all outlets. To further that, all the cords have an insulated covering.

Here’s more…

The A-iPower can be used with small devices such as power banks and batteries. It includes a DC adapter that’s built-in, along with DC charging cables. As for the design, it looks like a traditional electric-start generator.

But the wheels are 9.5 inches in diameter and reduce friction. This is turn, makes moving the generator a whole lot easier.

As for accessibility, the A-iPower has an inclined control panel that is easy to use and reach. It helps you avoid neck strains, and the markings on the panel make it easier to understand the function of each button. And the engine produces noise as low as 78 dB.

A-iPower SUA12000E
Our rating:4.4 out of 5 stars (4.4 / 5)

Pros

  • Low noise output.
  • Features fuel gauge.
  • DC adapter and cables included.
  • Better accessibility.
  • GFCI protected.

Cons

  • Manufacturing faults are frequent.

9 Generac 7043

Right off the bat, you can notice the elegant silver design, which makes it perfect for use in offices. Now you won’t need to put your generator in the corner of the room. This generator will not spoil the interior design of your house and keep your appliances running.

But that’s not all we love about the Generac. To start off with, the Generac uses a special Generac G-Force Engine. It’s built to last and pressure-lubricated, to reduce maintenance requirements.
It is through this engine that the Generac is able to deliver between 19.5 and 22 kilowatts of power. And the electrical signals produced have less than 5% THD, allowing for smoother operation. However, the engine is pretty loud and noisy.

To add to that, the Generac 7043 features weather protection as well! It uses a special Rhino Coating made from corrosion-resistant aluminum. So you can leave it outside of the house too.

Here’s more…

It can resist snow, rain, and even high levels of dust. However, it is recommended to clean it. And for that, the Generac allows you to remove the paneling from three sides. This helps in installation and servicing.

We recommend investing in a Generac if you have too many appliances. The high power output means you can connect it to heaters, refrigerators, and sump pumps.

Generac 7043
Our rating:4.4 out of 5 stars (4.4 / 5)

Pros

  • Highly reliable with a 5-year warranty.
  • Low maintenance requirements.
  • Smoother voltage output.
  • Weather-resistant.
  • Aesthetic design.

Cons

  • It produces a lot of noise.

10 DuroMax XP12000EH

DuroMax is no bystander when it comes to high power generators. This DuroMax model is the best for powering up your whole house.

It features an 18 horsepower OHV engine with 457cc. This allows every room in your house or office to get an uninterrupted supply of electricity.

The powerful OHV engine is able to supply wattage of 12,000 watts, with a running power of 9,500 watts. This high wattage makes it compatible with equipment that sucks up a lot of power. An example would be a refrigerator or an air conditioner.

The one thing that sets this generator aside is fuel flexibility. The DuroMax can run on both gasoline and propane. So you won’t have to worry about spikes in the price of gasoline, as there will always be a cheaper option.

Is that all? Wait, here’s more.

Speaking of flexibility, the DuroMax has two output options: 120V and 240V, or 120V only. You can run it with a 120V and 240V voltage output simultaneously.

Aside from that, the fuel tank capacity is about 8.3 gallons, and the approximate runtime is 8 hours.

Admittedly, the runtime is a bit lower than other generators. But if you run it on propane, you can get up to 20 hours of runtime. This is yet to be tested, however, as there doesn’t seem to be any exact runtime on the generator.

The DuroMax generator has one outlet, each of 50 amps, 120/240 30 amps, and 120V 30 amps. Along with that, you also get two regular 20V household outlets.

Like every other DuroMax product, this generator is also approved by EPA and CARB. A CARB certification specifically means that the generator can be safely shipped to the state of California.

DuroMax XP12000EH
Our rating:4.2 out of 5 stars (4.2 / 5)

Pros

  • Great for ACs and fridges.
  • Wide connectivity options.
  • CARB approved.
  • Powerful engine.
  • Larger fuel tank.

Cons

  • Runtime is very low on gasoline.

Best Whole House Generators Buying Guide

What should you look for when you want to pick out the best whole house generators? Here are a few tips to help you get started:

How Big Of A Generator Do I Need?

Normally, the “size” (i.e., power output) depends on how many rooms you want to supply power to. For a regular-sized home, you can normally power all your appliances by using 3000 to 6500 watts.

However, if you use a large furnace and have your own well pump, you can expect something in the 5000 to 6500 range.

Electric and gas heaters can take up power too. A typical electric heater needs 4500 watts at a minimum. For campers, RVs, and boaters, anywhere between 1000 and 2000 watts can take care of most things.

An easier way to do this is to note the starting wattage of all your appliances and machinery. Then add them up and find a generator with a similar starting watt.

Whole House Generators

Compliance with Safety Inspections and Code Requirements

Generators can feature safety in multiple ways, including certifications. The Environmental Protection Agency (EPA) approves generators and power supplies. This is to make sure they don’t emit harmful gasses and ruin the indoor air quality.

Aside from that, approval from CARB means that the generator can be shipped to California. Even if you’re living in another state, a CARB approval means the product is highly secure. Other than that, an OSHA certification also means that your generator is safe from electrical and fire hazards.

Fuel Types

Most generators either use gasoline, propane, or both. Those that run on gasoline not only produce a lot of waste but run for shorter amounts of time. A propane-powered generator is more eco-friendly and runs for more time. Ideally, gasoline generators run for up to 9 hours, and propane generators run for 17 to 20 hours.

If you can afford it, get a generator that uses both. So you can easily switch things up if one type of fuel isn’t cutting it for you.               

Installation

This is the part that most people often overlook. The installation of the generator is what makes the process so much more intimidating. Normally, generators are small and can be carried around by one adult. Most come pre-assembled, where you only require plugging in the battery and the other cables.

The cables that go into the outlets can also be confusing. Most have outlets that supply 12 V DC, 120 V AC, and 240 V AC. These can be hooked to powerful appliances or the circuitry of a room. Some also feature USB cables to directly charge up batteries and power banks.

A/C Shedding Options and Load Maintenance

This is quite a new thing for most people. Load shedding refers to the act of turning off low-priority appliances to supply power to higher-priority equipment.

In simple terms, if you have too many appliances connected to your generator, it will overload and shut off. In this case, it is wise to manage the load by “shedding off” devices that you don’t need.

Regular homes don’t face this issue much, as the appliances used aren’t too heavy. Unless, of course, you have too many furnaces, sump pumps, heaters, etc. connected.

Some generators come with a load management system. This system prioritizes certain equipment and only supplies power to others when extra power is available.

Fuel Efficiency

Fuel efficiency refers to how much fuel is being used and how much is being wasted. Manufacturers tend not to display the efficiency of the engine unless it’s really high.

If you can find out the efficiency, make sure it’s not lower than 90%. Fuel is expensive as it is, so wasting it is a big blunder. In this regard, we highly recommend reading about the different types of engines and their expected efficiencies.

Noise Factor

Noise is such a frequent issue with generators that we’ve particularly gotten used to it. Every engine produces noise. It can almost never be gotten rid of. However, some generators do have lower noise output.

Most on the market have a noise figure of between 70 to 80 dB. Some may feature a quieter operation at 65 dB, but those usually have a lower power output. It should be noted that if you keep the generator outside of the house, then the noise shouldn’t be that much of an issue.

Conclusion

With enough investment and the right decision, you can power up almost any room in your house. All you need is one of the best whole house generators. If you’re still confused, then we recommend trying out the Westinghouse Generator. It’s one of the best, with high power output and amazing engine performance.

And if you’ve already found your favorite generator, then best of luck. We hope you like these generators just as much as we liked them. And that they will not give way right when you need them.

Leave a Comment