7 Best 4000-Watt Generators for Indoor, Outdoor, and Everyday Use

Sometimes you need a little portable power, but more than what standard batteries can provide. Or you might need some extra energy to power appliances indoors or outdoors, but the locations of your power outlets leave a lot to be desired.

In either case, a 4000-watt generator might be the solution you need. Depending on the generator you pick, some units are powerful enough to run all the appliances in your mobile home. Others are perfect for keeping a refrigerator going, while also having enough energy to spare to run some air-conditioning units at the same time.

Whatever your reasons, let us show you the best 4000-watt generators on the market.

Overview table

Finding the right 4000-watt generator for your needs can be tricky, especially if you don’t have the time to do the research yourself. Don’t worry, we did the heavy lifting and finished all the research for you. Check out a quick list of the highlights of each of our favorite 4000-watt generators.

Editor choice 1 Yamaha EF4500iSE
Yamaha EF4500iSE
(Best Quality 4500-Watt Generator)

This generator is one of the more fuel-efficient models available and is portable despite its weight. It’s got a number of excellent technological innovations and plenty of startup power for even the most demanding appliances.

2 Westinghouse iPro4200
Westinghouse iPro4200
(Best Solid 4000-Watt Generator)

This is a durable and long-lasting machine that also has excellent fuel efficiency. The addition of two USB ports gives it some added value for those with smaller gadgets in need of a boost.

3 Pulsar PG4000iSR
Pulsar PG4000iSR
(Best 4000-Watt Generator with Extra Outlets)

This generator boasts of a large fuel tank and plenty of outlets for using many appliances simultaneously. It can also be used in an RV with a dedicated outlet.

4 XtremepowerUS
(Best 4000-Watt Generator for the Money)

This affordable generator has plenty of outlets and lots of safety features. It’s one of the best picks you can make for traveling with a family in a mobile home.

5 Champion 76533
Champion 76533
(Best Dual-Fuel 4000-Watt Generator)

This generator can be run with either gasoline or propane. This versatility is continued with a high number of outlets and some extra features to make it worth checking out.

6 DuroStar DS4000S
DuroStar DS4000S
(Most Durable 4000-Watt Generator)

This heavy-duty generator has a durable steel frame and surge protectors integrated into each outlet. It’s excellent for use outdoors.

7 Sportsman GEN4000LP
Sportsman GEN4000LP
(Best 4000-Watt Generator for Charging Batteries)

This generator runs on propane and comes with a hose you can get started right away. It also has a fairly unique battery charging port.


1 Editor choice

Yamaha EF4500iSE – Best Quality 4500-Watt Generator


  • 4500 starting watts
  • 4000 running watts
  • Electric start
  • Wireless remote control
  • Easy to read hour meter
  • Wheels and twin bars
  • 7.4-hour runtime at max speed
  • Compliable with California Air Resources Board Tier III exhaust emission standard

This generator is a phenomenal machine. It’s incredibly fuel-efficient and easy to move, so it’s one of the most portable inverter 4000-watt generators you can find on any market. The fuel efficiency is excellent! It can run from 7.4 hours at its maximum speed of 2600 RPM. You can also go as low as 1000 RPM to stretch out fuel efficiency even more. It’s 4500-Watt startup output is perfect for powering heavier machinery and larger appliances without trouble.

This generator also has a wireless remote that can work from up to 66 feet away; it’s incredibly convenient when the generator is stashed in a small or high place away from your hands. You can also use the electric start button with a key to begin power generation.

The inclusion of an automatic choke ensures that the generator will start even if the ambient temperature is quite low. The front of the generator has both a low oil warning system, a gas gauge, and a power meter so you’ll never be taken by surprise when the unit needs tuning or refueling.

Add to that a pair of lifting bars located on the top of the generator and four rolling wheels and you got yourself affordable and compact inverter generator that’ll last for a long time to come.

  • Powerful
  • Very easy to move around with wheels and handles
  • Good for fuel efficiency
  • Remote start is useful and convenient
  • Quiet for indoor use
  • Safe
  • Heavy
  • A bit expensive

Westinghouse iPro4200 – Best Solid 4000-Watt Generator


  • 4200 starting watts
  • 3500 running watts
  • 2.6-gallon fuel tank
  • Six power outlets
  • 2 USB outlets
  • Efficiency mode
  • 22-hour runtime

In terms of machines that are built for the long haul, you’d be hard-pressed to find a generator better than the Westinghouse. This generator can run for up to 22 hours on a 2.6-gallon gas tank; that’s phenomenal value for money fuel efficiency so it’s perfect if you need a generator you can rely on consistently.

This generator is built to handle multiple appliances at the same time. It has six different outlets for industrial or household appliances, plus 2 USB outlets if your handheld devices need a little juice as well.

Westinghouse iPro4200-3

To improve efficiency even more, you can set a strict “efficiency mode” and stretch out the fuel supply you have left in a pinch. A low oil shut off system is implemented to keep you and your family safe in the event of an overload.

The generator also comes with lifetime technical support and a warranty for the first 1000 hours of use. It’s a great combination generator that takes the best parts of inverter generator fuel efficiency with the reliability of conventional generators to create a unique and effective product.

  • Very good fuel efficiency
  • Not as loud as other conventional generators
  • Lots of outlets and ports
  • Large fuel tank
  • Durable steel frame
  • Difficult to carry (no wheels)

Pulsar PG4000iSR – Best 4000-Watt Generator with Extra Outlets


  • 4000 starting watts
  • 3500 running watts
  • 15-hour runtime at half load
  • 3.4-gallon fuel tank
  • Wireless remote start
  • Comes with wheels and a handle
  • 1 USB port
  • 5 power outlets

This generator is ready for use in an RV or anywhere else. It comes with five different power outlets, one of which is designed for use with mobile homes, and a single USB outlet for excellent power distribution versatility.

Turning the generator on is easy thanks to the electrical push-start or the wireless remote. The remote can operate from up to 80 feet away. A battery indicator and other warning lights are located near the switches to let you know when fuel is starting to run low or the generator is in danger of overloading.

The Pulsar is very fuel efficient, too. It can run for 15 hours at half load and has a generous fuel tank. Moving the generator around is simple thanks to the telescoping handle that collapses into the main chassis when not in use, plus the two wheels on the back of the body. It’s compact, quiet, and fuel-efficient, so it’s an excellent choice for taking on a camping trip or other mobile expeditions.

  • Can be used with an RV
  • Convenient USB port
  • Large fuel tank
  • Generally quiet
  • Very movable
  • Remote start is convenient
  • Becomes louder at higher loads

XtremepowerUS – Best 4000-Watt Generator for the Money


  • 4000 starting watts
  • 3500 running watts
  • Easy recoil start
  • 3 outlets, 1 for RV
  • 10-hour runtime
  • ~ 0.16-gallon oil capacity

This generator is incredibly affordable and still provides excellent value and quality. It can run for up to 10 hours at full load, taking advantage of the well-sized gasoline tank. Starting up the generator uses a simple recoil start system that you can initialize from the front panel.

The panel also has an engine shut off switch for emergencies, as well as voltmeters and circuit breakers. All of these instruments are designed to give you total control of what you power and how.
The generator comes with three different outlets, one of which is suitable for use with an RV. It’s also a relatively quiet generator, only running about 67 dB at 7 m. Since the engine is air-cooled, you don’t have to listen to a loud cooling system causing extra noise.

The only downside to this generator is its lack of extra outlets. Having only three limits the number of appliances you can use with it at one time, so you’ll need to make choices if you’ve got a lot of machines demanding power.

It’s best used as a stationary generator that powers a few things consistently.

  • Isn’t too loud
  • Ready for RV use
  • Safe and easy to start and operate
  • Good efficiency
  • Only 3 outlets, 1 of which can’t be used for usual appliances

Champion 76533 – Best Dual-Fuel 4000-Watt Generator


  • Runs on gasoline or propane
  • 4750 starting watts, 3800 running watts on gasoline
  • 4275 starting watts, 3420 running watts on propane
  • 4 outlets, 2 for RV
  • 2 wheels
  • 9-hour runtime on gas, 10.5-hour runtime on propane
  • 3.4 Gallon fuel tank

This generator can be powered by two different fuel sources: gasoline or propane. The gasoline fuel source can give you slightly more power than the propane, at the cost of slightly less fuel efficiency and an overall runtime of just shy of 10 hours.

The generator comes with four power outlets in total, two of which are already prepared for use with an RV or mobile home. The generator can be started up the control panel located on the front face of the chassis, and a voltage meter is included to let you monitor energy draw and capacity as time progresses.

Each of the two primary outlets is protected by Volt Guard power surge defenders. These are excellent for ensuring that the generator won’t overload in a storm. The generator can be moved somewhat easily thanks to the two large wheels located on its left side. This is a good thing, as it’s rather heavy. A propane hose is included, as well, to make switching between fuel sources more convenient on your end.

Unfortunately, this generator is rather loud, going up to 68 dB even at 23 m. This is best used outdoors for larger jobs that require a lot of energy at once, especially if you have both fuel sources present.

  • No need to rely on just one fuel source
  • Mobile to some degree
  • Outlets are protected from surges
  • Large fuel tank
  • 3-year limited warranty
  • Runtime is a bit low
  • Loud

DuroStar DS4000S – Most Durable 4000-Watt Generator


  • 4000 starting watts
  • 3300 running watts
  • 3 outlets, 1 for RV
  • 4-gallon fuel tank
  • 12-hour runtime
  • Integrated surge protector
  • Tough metal frame for protection

This generator is a consistent and heavy-duty machine. It’s built with a durable steel frame that surrounds the more delicate instrumentation of the main generator machinery. It’s built for use outdoors, especially since it’s pretty loud for use in confined spaces.

The generator has three separate outlets, one of which can be used for RVs or mobile homes. Each of the outlets is protected by an integrated surge protector; this can be of particular benefit on construction sites or spots where you might be switching from machine to machine frequently.

There’s also a voltmeter and a low oil shut off function to protect the generator even further. The generator works for up to 12 hours of runtime on a full tank of gasoline, which is about four gallons if filled to the brim. However, this is a rather heavy generator and there aren’t any mobility assistants like wheels or handle.

It’s best used when it’s placed in a spot where won’t be disturbed and it can consistently provide your appliances or with regular, uninterrupted power for long stretches of time.

  • Ready for heavy-duty
  • Good construction, very durable
  • Plenty of safety features
  • Long runtime on a full gasoline tank
  • Gas tank is large
  • Loud and heavy

Sportsman GEN4000LP – Best 4000-Watt Generator for Charging Batteries


  • 4000 starting watts
  • 3250 running watts
  • 10-hour runtime on 50% load
  • Propane hose included
  • Auto fuel shutoff included
  • Non-CARB compliant
  • 3 outlets, 1 for battery charging

This propane-powered generator comes with the hose you need to get started right away, although of course, you’ll have to supply your own fuel. It can run for up to 10 hours at 50% load, making it a great choice for mobile use or confined inner spaces.

It’s not too heavy, either, even though it doesn’t have any dedicated handles or wheels. It weighs 88 pounds without a propane tank attached. It has a number of safety features to promote a long lifespan, such as a circuit protector, a recoil start system, and an auto fuel safety valve that shuts off automatically if the generator is in danger of overloading. There are three outlets you can use, and one of them is specifically designed for charging portable batteries.

As it runs at lower than 68 dB and doesn’t emit much carbon monoxide, it’s good for use in campsites and some RVs and mobile homes. However, this noise is likely a bit much for many confined spaces.

  • Not too loud
  • Good safety features
  • Light enough to carry around
  • Long propane hose (5 feet)
  • Lower emissions
  • Still a bit noisy

Buying Guide

When we were looking at the best 4000-watt generators, we examined these major factors to determine good units from mediocre ones. You should keep these aspects in mind as well as you browse for the generator best-suited for your needs.

Starting Watts/Running Watts

The starting and running Watts of any given generator dictates the kinds of things you can start, particularly when it comes to large appliances. Higher starting Watts let you start up bigger motor-driven appliances and tools like air-conditioners and refrigerators; these larger machines take an extra kick to really get going.

On the other hand, the running Watts metric measures how much power your generator produces as it continually runs. This metric informs you of what appliances a generator can keep running, or in more cases how many things you can run with one generator at a single time.

In both cases, higher Watts mean that you’ll need more fuel, so it’s common to see generators with higher watt-counts and good fuel capacity.

Naturally, all of these generators will have a 4000-watt starting rating, but their running watt counts will vary from unit to unit. Consider how many appliances you plan to run on your generator at the same time before making a final purchase.
You can also deliberately calculate the Watts necessary for your various appliances and machines to run, then add them all up for a total amount. Then you can try to find a generator that has enough watts to work for your needs.

The Yamaha EF4500iSE is a great example of a generator with great runtime power.

Yamaha EF4500iSE-1

Conventional or Inverter

These are the two major types of portable generators.

Conventional generators are the standard type that has been around for decades. They rely on a central motor attached to an alternator, and these parts are fueled with gas to create electricity.

Inverter generators are smaller and lighter than conventional generators in most circumstances. They also tend to be quieter, although this is not a universal difference.

Inverter generators have a unique ability to change DC power into AC power with a high enough frequency. The resulting stability reduces the likelihood of any power fluctuations or ripples in your electrical lines.

Conventional generators produce power at a single level consistently, and you normally can’t change this speed. Conversely, inverter generators can either be manually adjusted or will automatically adjust their speed based on the power draw currently required. For instance, they will produce less waste and be more efficient with their energy if the power draw is lower than its maximum capacity.

Because of this, inverter generators are typically a lot “greener” and better for the environment. Overall, they waste less power.

In general, inverter generators are great for portable uses, like in RVs or for campsites. On the flip side, conventional generators are great for larger-scale needs and for relatively-stable power draw situation, like when used for the entertainment systems at your home.

Again, the Yamaha EF4500iSE is a fantastic example of an inverter generator. The Westinghouse iPro4200 is something of a combination generator with aspects of both types.

best 4000 watt generator

Fuel Options

Some generators come with two fueling options or methods while others will only have one. Larger 4000-watt generators will sometimes have both liquid propane and gasoline, as an example, while many smaller inverter generators will only have one propane tank option.

Having dual fuel options is a necessity, but it’s a good idea if you never want to accidentally run out of power. If you ever need to switch to another fuel source and an emergency, a generator with dual fuel compatibility will be able to keep running through the crisis. As a best option, running on gas and propane, we recommend Champion 76533. This model is unlikely to let you down!

Champion 76533)3


Fuel Capacity/Efficiency

Of course, fuel capacity matters a great deal as well.Having a larger fuel tank means that you can run your generator for longer before needing to refill whatever fuel source is required. This does usually add some more weight to the overall unit, but it’s usually worthwhile in terms of the extra hours of use you can squeeze from the generator.

However, fuel efficiency is the other side of this coin. Generators that have massive fuel tanks but low fuel efficiency will burn through even the biggest tanks in no time at all and may even cost you more money in the long run due to a constant need to refuel.

Check the “runtime” of any given generator to determine how efficient it is with its fuel. Most models will have a chart or diagram depicting how long a generator can run at a certain power load. A good rule of thumb is to never settle for any generator that can’t provide you with at least 9 to 12 hours of fuel at 50% of its power load.

Such a generator will let you get a lot of work done throughout the day or sleep through the night without having to refuel.The DuroStar DS4000S has an excellent fuel capacity, for example.

Durostar DS4000S_3


Most 4000-watt generators can power up to three larger appliances at any one time. Therefore, three outlets on any 4000-watt generator is a necessity.

But three outlets don’t leave you any room for plugging extra devices or appliances in, and it can become a hassle to constantly plug or unplug appliances from the generator.

For better efficiency and results, try to find a generator that has four outlets if you plan to use a wide variety of appliances and machines with your generator. You can always settle with three outlets if the generator is going to be used for only up to three appliances, but having the extra slot is nice in a pinch or an emergency.

In addition, any 4000-watt generator you want to use in a motor home or RV needs to have RV ready outlets. A 30A RV Twist Lock is a good example of such an outlet. Most generator brands mention on the box or in their product specifications if they are usable with a mobile home or RV. The Pulsar PG4000iSR has plenty of outlets to use.

Pulsar PG4000iSR

Noise level

Don’t discount this factor when making your final decision. The noise level of your 4000-watt generator can be a hindrance or a non-issue depending on how loud it is and where you plan on using it.

Generators that are going to run outdoors and sparingly can be a lot louder than once you plan to use indoors and frequently. You don’t want a really loud generator rattling and buzzing incessantly while you’re trying to do work or sleep.

Naturally, inverter generators have an advantage here, since they are usually quieter or practically silent when compared to conventional generators. Inverter generators usually produce less than 60 dB(A) of noise compared to the typical 65 dB(A) of noise produced by conventional ones.

If your generator is going to run in the backyard or garage of a suburban neighborhood, remember to keep the preferences of your neighbors in mind as well. You’ll likely get a bunch of complaints if you run a really loud generator all the time.
The XtremepowerUS is pretty good when it comes to working well while keeping noise low.



While all of these 4000-watt generators are designed to be portable, there are some that are more portable than others. The size and weight of your generator dictates who can carry them from place to place and how long they can lift them.

Larger and heavier generators will be a total pain if you need to move them from car to campsite or car to garage and back. Lighter generators are a lot easier to handle, and they are usually a lot better for taking on a camping trip or outdoors expedition.

You can also find 4000-watt generators that come with wheels or handles to assist with portability. Wheeled generators are obviously best for moving around on flatter ground, while generators with handles can be taken anywhere provided you have the strength to manage the job.


The warranty of a given 4000-watt generator is a good indication of how much faith the manufacturer has in the product. Generators that have a generous warranty with lots of technical support are likely built to last and can be counted on to work in tough conditions. But generators that have poor warranties or warranties that expire very quickly might not be worth their lower asking price.

Overall, good warranties are usually worthwhile, particularly if you plan to use your chosen unit all the time. Warranties can provide peace of mind in situations where you’re not sure if your generator will survive inclement weather, flooding, or a moving day.

Final Words

Overall, the right 4000-watt generator for your needs may be different from our favorite. But we’re sure that the Yamaha EF4500iSE is a good starting point for just about anyone in need of some portable power.

Its excellent running watt rate and phenomenal design innovations, like its wireless remote, make it a fantastic product for most situations or scenarios. But if you’re not sure, remember the advice in our buying guide and you’ll be able to find the best 4000-watt generator no matter what you need it for.

Good luck!

You have read the article! Great job! Do not forget to rate the article.

We will be happy to hear your thoughts

      Leave a reply

      Login/Register access is temporary disabled