Best 4000 Watt Generator Reviews

Updated November 2, 2020

Whether you love to camp or just want to stay safe during a power outage, a 4000 watt electric start generator is a great investment.

Power outages are not just inconvenient, but they can even be dangerous in certain scenarios, and having a small generator on hand can give you the peace of mind you need during storms or on hot days. These small generators are also an excellent option for camping.

They’re compact and portable, but still provide enough power for your essentials. A 4000 watt generator is an investment, and you’ll want to make sure that the one you choose is durable and well-constructed. We’ve rounded up some of our favorite 4000 watt generators to help you select the best option for your needs.

Best 4000 Watt Generators

#PREVIEWProduct
1
Best For Higher Budgets
1Westinghouse iGen4500DF Generator
Westinghouse - iGen4500DF Dual Fuel Portable Inverter Generator
Best For Higher Budgets
Westinghouse iGen4500DF Generator
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2 Champion 4000-Watt RV Ready DH Series Open Frame Inverter with Quiet Technology
Best Overall
Champion 4000-Watt Generator
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3 WEN - GN400i RV-Ready 4000-Watt Open Frame Inverter Generator WEN GN400i Generator
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4 Briggs & Stratton - 30676 Portable Generator with RV Outlet Briggs & Stratton 30676 Generator
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5 Firman P03601 Recoil Start Gas Portable Generator Firman P03601 Generator
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6
Best For Low Budgets
6Rainier R4400 Generator
Rainier - R4400 Portable Generator with Electric Start
Best For Low Budgets
Rainier R4400 Generator
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7 Briggs & Stratton - P4500 Power Smart Series Inverter Generator Briggs & Stratton P4500 Generator
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1. Westinghouse iGen4500DF Generator

Highlights
  • Dual-fuel type operation
  • Remote start capable
  • Digital display for fuel and output levels
  • Ultra-quiet operation
Best For Higher Budgets
Westinghouse - iGen4500DF Dual Fuel Portable Inverter Generator

This is a great dual-fuel portable generator, as it allows you to use both gasoline fuel as well as propane fuel to run it. A 3.4-gallon fuel tank can be filled with gasoline, which will allow the generator to run at a maximum of 4500 watts and running wattage of 3700 watts.

For more extended use, you can seamlessly change to propane gas on the fly via the receptacle, which will allow the unit to run at a reduced maximum of 4050 watts and 3330 watts constant power. This is great if you’ll be running the generator for a long time, as it will be a much more economical way to fuel your generator with minimal difference in power output.

Perhaps what makes the Westinghouse iGen 4500 stand out from the rest on this list is its remote start functionality. It comes with a key fob that allows for push button start thanks to the electric starter, and it also maintains a low minimum of 52dBA of noise.

Specifications

Size:
24.5in x 17.5in x 20in
Voltage:
120V
Wattage:
Gasoline: 4500 watts (peak), 3700 watts (rated) Propane: 4050 watts (peak), 3330 watts (rated)
Noise Level:
52dbA
Output:
37A peak/30A running (gasoline) 34A peak/28A running (propane)
Power Source:
Gasoline, Propane

Pros

  • On-the-fly dual-fuel compatibility
  • Compact, modern design
  • Built-in 5V DC USB ports
  • Remote electric start system

Cons

  • Power output might be limited

2. Champion 4000-Watt Generator

Highlights
  • This generator has a power level of 4000 starting watts and 3500 running watts, which provides a total runtime of 17 hours.
  • It is an inverter generator with clean, efficient power. It has three 120V outlets – two 20A and one 30A – as well as a 12V DC outlet and a USB adapter. 
  • This model has an economy mode feature, which helps to reduce fuel consumption and extend the runtime. 
  • It has an open frame design that is light and easy to carry.
Best Overall
Champion 4000-Watt RV Ready DH Series Open Frame Inverter with Quiet Technology

Champion’s 4000 watt generator is a reliable option for camping or basic household power generation. It is an inverter generator that produces clean power suitable for electronics like laptops and cell phones. It is very affordable for an inverter generator, so it’s a good option if you need clean power, but don’t want to splash out for a more expensive model.

This generator has a respectable runtime of 17 hours with a 2.9 gallon fuel tank. The engine is a 224cc Champion model that produces 4000 starting watts and 3500 running watts. A low oil shutoff sensor turns the generator off when oil levels drop to prevent safety issues. It comes with a range of outlet options for a variety of different types of electronics, and the control panel is very simple to navigate.

It has an open frame design, which you would expect from a more traditional generator, but it is relatively light and can be carried around. Champion makes compatible parallel kits, which allow you to connect this model to a larger generator for increased power. There is also an economy mode to help you save energy. Not only is this mode very efficient, but it helps your generator last longer.

Specifications

Size:
20.5 x 17.9 x 17.7 inches
Voltage:
120V
Wattage:
4000 starting, 3500 running watts
Noise Level:
64 dB
Power Source:
Gas

Pros

  • Since it is an inverter generator, this model works well with many different types of electronics, and has a wide range of outlets to support them.
  • It has a noise level of 64 decibels, which is relatively quiet for a generator of this power level.
  • It has an efficient design that is relatively lightweight, and a control panel makes it easy to navigate the various functions that the generator offers.
  • You can connect this generator to other inverter generators using Champion’s parallel kit, which is sold separately. This is a great way to increase your power.

Cons

  • Some users have reported issues with mild oil leakage.

3. WEN GN400i Generator

Highlights
  • The OHV inverter generator produces clean power. 
  • 212cc engine generates 4000 starting watts and 3500 running watts. 
  • It is available in open or closed frame designs. 
  • There are three 120 volt outlets, including one for RVs, as well as two USB ports.

This generator from WEN is a great choice for those who want to be able to power their smaller electronics anywhere. It has a reliable 212cc OHV 4-stroke engine that runs with a maximum of 1.2 percent harmonic distortion using inverter technology.

This means that it is completely safe to use with your sensitive electronic devices. It runs at 4000 surge watts and 3500 running watts. The 1.85 gallon fuel tank requires gasoline and can run for seven hours at half of its maximum load.

The generator is designed to meet CARB requirements, and has an eco mode to help your fuel last longer. The eco mode essentially adjusts the fuel output to match the electronic devices that are plugged into the generator at any given time.

Since this generator is an inverter generator, it is very quiet, running at around 57 dB. This is about the same volume as a normal conversation.

There are many safety features built in to protect the life of the generator, including overload protection as well as an automatic shutdown if the generator is low on oil or fuel. It has two three-prong 120V outlets, which will work with many electronic devices.

It also has a TT-30R 120V outlet specifically for use with RVs, as well as two 5V USB ports. Since this generator is relatively small, you can easily link it to another generator for more power using the WEN brand’s parallel connector kit, which needs to be purchased separately.

Specifications

Size:
19.8 x 13.8 x 18.9 inches
Voltage:
120 V
Wattage:
4000 starting, 3500 running
Noise Level:
57 dB
Power Source:
Gasoline

Pros

  • The clean power means this generator is safe to use with devices like computers and televisions.
  • The generator is CARB compliant and has an eco-friendly mode to conserve power.
  • It is easy to link to other generators for more power with a parallel connector kit.
  • This generator is very quiet, running at less than 60 dB.

Cons

  • It does not come with a wheel kit, which can make it difficult to move around.

4. Briggs & Stratton 30676 Generator

Highlights
  • This generator has a 208cc engine with 4375 starting watts and 3500 running watts.
  • It has a 5 gallon fuel tank with a 14 hour run time. 
  • It comes with 3 120V outlets, one of which is specifically for RVs. 
  • There are 7-inch wheels attached to the base of the generator.

This generator from Briggs & Stratton is a good choice for those who are most concerned with a long run time.

This gasoline-powered generator can run for as long as 14 hours on a half load, and has a full 5 gallon fuel tank. It has a recoil start as well as a CO guard for safety, which will shut the generator off if there is too much carbon monoxide in your immediate area. The power surge alternator prevents the generator from overloading, and rubber outlet covers can prevent electrical accidents.

It has an open frame design, and although it weighs over 100 pounds, it does come with wheels already installed to help you move it around.

There are a total of three outlets and there are twist lock options for RVs. Since this is not an inverter generator, the engine can be quite loud, and it may not be safe for some sensitive electronics.

Specifications

Voltage:
120 V
Wattage:
4375 starting, 3500 running
Power Source:
Gasoline

Pros

  • This generator has an excellent run time of 14 hours at a half load.
  • A power surge alternator protects your generator from overloading.
  • The control panel is angled for ease of use, and each outlet has rubber protectors to keep you safe.
  • Briggs and Stratton offers a two-year limited warranty to protect your purchase.

Cons

  • Although it has wheels, this generator is heavy for a model of its size and can be difficult to move around.
  • This generator is relatively loud because it is not an inverter generator.

5. Firman P03601 Generator

Highlights
  • It has a starting wattage of 4550 and a running wattage of 3650, with a 208cc engine.
  • The gas tank holds up to 5 gallons. 
  • It has a run time of 14 hours and uses an automatic voltage regulator. 
  • It has a Whisper series muffler to keep noise levels down.

This is a very powerful recoil generator that can keep your home running in the event of a power outage. It has a huge 5 gallon tank and can run for up to 14 hours at a time. It has a powerful Max Pro Series 208cc Farman engine with an automatic voltage regulator, power stream alternator, and Phoenix Fat Head block for energy efficiency. 

Although recoil generators are normally quite loud, this one comes with a muffler and spark arrester to keep volumes relatively low. This generator is heavy and very durable, so it can stand up to extended use. You can easily monitor your generator’s stats using the data minder, which indicates the voltage, remaining amount of power, oil levels, and more.

Specifications

Size:
23.2 x 17.5 x 18.5 inches
Voltage:
120V
Wattage:
4550/3650 Watts
Noise Level:
68 dB
Power Source:
Gas

Pros

  • A data gauge indicates the current voltage, Hertz, and hours remaining on the generator, and will also indicate if you are running low on oil.
  • It has a very durable design that is built to last for years.
  • It is very powerful and has a long run time for the price.
  • It has four different outlets, so you can connect to a wide variety of devices.

Cons

  • It is heavy and can be difficult to move around.

6. Rainier R4400 Generator

Highlights
  • The 212cc OHV engine runs at 4400 starting watts and 3600 running watts. 
  • The four gallon fuel tank runs for 18 hours at 25 percent capacity. 
  • It has a total of four outlets and two grounding ports. 
  • This generator comes with an 8 inch wheel kit already installed.
Best For Low Budgets
Rainier - R4400 Portable Generator with Electric Start

This generator from Rainier is an excellent option, both at home and while you’re on the road. The 212cc engine produces 3600 running watts, which is enough to power your small electronics.

It’s also very easy to use – the electric start option means you can turn it on with the press of a button. A recoil start is also available for emergencies. It’s excellent for RVs, as it has 120V 30 amp twist lock outlets in addition to two 120V household outlets.

This generator is also very easy to move around, because it has both wheels and a folding handle. It is both EPA and CARB compliant, so you won’t have to worry about unsafe emissions.

It also comes with low oil and overload protection for your safety. It runs on gasoline and lasts up to 18 hours on a partial load. Rainier offers a three year warranty on this product for your peace of mind.

Specifications

Size:
23.3 x 15.5 x 21.3 inches
Voltage:
120 V
Wattage:
4400 starting, 3600 running
Power Source:
Gasoline

Pros

  • The wheel kit and a folding handle make this generator very easy to move around.
  • There are a variety of outlets for different types of devices, including both household and twist lock outlets.
  • It has both an electric and a recoil start option for your convenience.
  • It has a long run time to power your devices through an extended power outage.

Cons

  • This generator does not produce clean power, so it may not be suitable for devices like computers and smartphones.

7. Briggs & Stratton P4500 Generator

Highlights
  • This inverter generator produces safe, clean power.
  • It has 4500 starting watts and 3700 running watts. 
  • This generator comes with four household 120V outlets, as well as a twist lock outlet and two USB ports. 
  • It comes with wheels and a handle already installed for mobility.

This portable generator from Briggs and Stratton provides the power you need to keep your electronics running on the go. This generator is an inverter generator, which means that it produces the clean power that you need to run sensitive devices like computers, televisions, and smartphones.

Inverter generators are also very quiet, and this generator has an additional layer of insulation to keep things even quieter. This makes it a great option if you’re worried about a generator being too disruptive.

This generator has 4500 starting watts and 3700 running watts. It has enough outlets for all of your devices, including 4 120V household outlets as well as a larger 120V twist lock 30A outlet for RVs.

There are also two USB ports for your smaller electronics. You’ll be able to monitor the generator’s fuel level and remaining run time on the electric panel. It has a 3.5 gallon fuel tank and runs on gasoline.

One of the best safety features that this generator offers is its CO guard, which shuts down the generator if there is too much carbon monoxide in the surrounding area.

Specifications

Size:
24.5 x 17.6 x 20.3 inches
Voltage:
120 V
Wattage:
4500 starting, 3700 running
Power Source:
Gasoline

Pros

  • Since this is an inverter generator, it produces clean power with minimal harmonic distortion that can be used with sensitive devices.
  • It is very quiet and has a protective shell on the exterior to minimize noise even further.
  • The start-stop button makes it very easy to turn the generator on and off.
  • Although the generator is heavy, it comes with wheels and a handle already attached, which make it easy to move.

Cons

  • The electric start button can be fussy, and there is not a recoil option as a backup.
  • It does not have parallel connector capability, which means you can’t increase its output.

4000 Watt Generator Buying Guide

Inverter VS Standard

One of the biggest considerations to make when selecting a 4000 watt generator is whether you would like an inverter generator or a standard generator. There are advantages and disadvantages to both types of generators that you’ll want to consider when shopping. 

An inverter generator converts its electric current from AC to DC and back again, which creates cleaner and more efficient energy than a standard generator. This clean electricity is necessary for powering certain devices, such as smartphones or computers. 

The biggest advantage of an inverter generator is that it uses far less fuel, which is easier on your wallet as well as being better for the planet. Inverter generators are also much quieter than their standard counterparts. If you’re someone that is sensitive to noise, inverter generators are going to be much more comfortable to use. 

The disadvantage of using an inverter generator is that they are more expensive than a standard generator. This means they may not be the best choice for someone on a tight budget. Inverter generators also tend to have a lower power output than standard generators. That makes them a better choice, so if you are on the lookout for inverter generators, make sure you read our inverter generator reviews to help you choose the one suitable for your needs. 

However, if you’re shopping for a 4000 watt inverter generator, this may not be a big consideration, since 4000 watt generators are inherently small. 

Fuel

Another factor to consider when selecting a generator is the type of fuel that it uses. Two common options are a propane generator or a dual fuel generator. Dual fuel generators can typically run on both gasoline and propane, although the exact fuel sources vary.  There are advantages and disadvantages to both types of fuel, so here’s what to look at when making your decision. 

4000 Watt Propane Generator

One of the biggest advantages of using a propane generator is that you can purchase propane in small tanks to keep at home, instead of having to get fuel directly from a pump. 

This means that you can easily keep propane on hand for emergencies. Propane has a very long shelf life, so you can store it at home without worrying about its quality. 

Propane is also generally considered to be better for the environment than gasoline, because it contains less carbon monoxide. It’s also easier on your fuel tank – it runs well in the cold, and propane tanks generally need to be cleaned less often than gas tanks. However, there are some disadvantages to using propane. 

The biggest disadvantage is that propane isn’t as readily available at gas stations as other types of fuel. It also can be more expensive in the long run, because it burns very quickly and you’ll likely need to repurchase it more often. 

4000 Watt Dual Fuel Generator

Dual fuel generators have the capacity to run on multiple sources – usually propane and either diesel or natural gas. The biggest advantage of this is that you can switch back and forth between fuel sources depending on what is available to you. 

Diesel is cheaper in the long run than propane, and it’s generally easier to find as well, so it can be very advantageous to have it available as a fuel option. 

Uses

There are many different uses for a 4000 watt generator. In fact, these small generators are a great choice for many people, because they’re portable and can be used with a wide range of appliances. 

When shopping for a generator, consider how you want to use it and look for models that are specifically designed for that. Here are some of the ways that you might consider using a 4000 watt generator. 

Home

It can be very helpful to have a generator at home, just in case the power goes out. There are a number of reasons why your city might experience a power outage – severe wind and precipitation during a storm can cause a power outage, as can an intense heat wave. Severe natural disasters like earthquakes could also cause a power outage. In some cases, power outages happen as the result of a maintenance error or some other internal problem with the power grid. 

You never know when something like this might happen, so it can be very handy to have a whole house generator, just in case. When selecting a generator for your home, make sure that you have storage for it, as well as a safe place to run it (generators need to be run outside). 

RV

A 4000 watt RV generator is a great purchase for any outdoor lover. If you like to travel in an RV, this small generator will ensure that you can power your must-have electronic devices, even when you’re living off the grid. 

Having a generator on hand can make things like cooking, cleaning, or even just checking your email much easier when you’re on the road. 

Noise Level

One of the biggest challenges many people face when using a generator is the noise levels. Generators can be incredibly noisy and distracting, particularly if you’re trying to do something like have a conversation or watch TV. When selecting a generator, you’ll want to look at the noise level, which is measured in decibels. 

For reference, the average conversation is 60 decibels, so anything higher than that may be disruptive. Inverter generators are generally much quieter than standard generators, so this may be the best choice if you are concerned about noise. 

Some generators also come with generator mufflers, which can be very helpful for reducing the sound. 

Portability

Portability is another important factor to consider when shopping for a generator, particularly if you’re planning on traveling with it. A 4000 watt portable generator is ideal for camping or RV trips. 

If portability is one of your main concerns when selecting a generator, you’ll want to look at the weight of the product before you purchase it. 

It’s important that you can lift the generator without too much strain on your body. Many generators come with wheels or handles, and these features can be very helpful for portability. 

Pricing Range

Of course, you’ll also want to consider the price of the generator before making a purchase. One of the advantages of purchasing a smaller 4000 watt generator is that they are usually more affordable than a larger generator. While prices can vary widely, for larger generators of high power, like 15000 watt generators, you can expect to pay several thousand dollars. 

A 4000 watt generator can cost anywhere between $300 and $1000, depending on its unique features and the quality of the construction. It’s important to remember that cheaper generators aren’t always better – you’ll want to find a generator that combines reliability with power.

Frequently Asked Questions

Q: What Can a 4000 Watt Generator Power?
A:

A 4000 watt generator is relatively small, so if you’re looking to power your entire home, it may not be the best choice.

However, a 4000 watt generator is great for powering one or two small appliances at a time. For example, it may be able to power a fridge, a small AC unit, a toaster oven, or a hair dryer.

Before plugging in any appliances, check to see how many watts of power they need – this will prevent you from overloading your small generator.

Our Verdict

A 4000 watt generator is a great investment for any household. Their small size makes them relatively easy to move around, and they’ll be able to keep you safe in a power outage.

These generators are also an excellent option for those who like to camp or travel in RVs, as they’ll keep you powered on the go.

Although it can be difficult to decide which generator is best, we recommend any of the options mentioned in this review. We also encourage you to review our buying guide to determine which one is the right fit for you.