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Best 4000 Watt Generator Review: Experts share their choice!

Investing in a suitable generator can be your best bet if you are aiming to have a power unit that lasts for a long time. We put together a quick and easy guide to help with your decision-making when it comes to choosing an appropriate generator for different kinds of uses. Here is our recommended list of our favorite 4000 Watt generators in the market today.

Click here for the Best 4000 Watt Generators available on Amazon

Here is a list of the Best 4000 Watt Generator

Top Five Best 4000 Watt Generator

1 - DuroStar DS4000S

Rating: 4.4 / 5.0

This gas-powered generator is the #1 best seller on Amazon and truly stays true to the hype. If you are looking for a generator to power up your parties, various appliances, or even your workplaces, then you can turn toward the DuroStar DS4000S for all your woes. Starting at 4000 Watts and running 3300 Watts, the DuroStar 7.0 HP generator is complete with a heavy-duty steel frame and a 4-point isolated motor, which lets out minimal levels of noise during operation. With the 8-hour runtime allotted and a 4-gallon gas tank coupled with an air-cooled OHV engine, the DuroStar DS4000S is quite a keeper. It is recommended you also purchase the DuroStar DS4000S-WK Wheel Kit for convenient maneuvering.


  • Easy setup and starts with one pull; Easy to operate
  • Compact and sturdy
  • Easy-to-read fuel indicator
  • Inexpensive at $264
  • Quiet during operation


  • Oil needs to be changed every time you go on to refill the gas tank
  • No Watt meter or amp meter
  • Tiny hardware pieces
  • Oil fill location is a bit inconvenient

DuroStar DS4000S Gas Powered Portable Generator Video Review

2 - Champion Power Equipment 46539

Rating: 4.5 / 5.0

This generator sports a suave look for a heavy-duty machine, and with the looks come the various features as well. A reliable, portable generator that can come in handy in your RV or even at camping sites or when facing the wrath of hurricanes, the Champion Power Equipment 46539 peaks at 4000 Watts and runs at 3500 Watts. It boasts of an OHV 196cc engine and weighs a solid 140 lbs. Its dimensions stand at 29x21x21, making it easily portable, and it also complies to the EPA carburetor standards, making it environment-friendly.

The gas tank holds out 3.8 gallons and can then keep running for a period of 12 hours when the load is at 50%. There are three outputs to this generator: the RV receptacle, a 120-volt duplex outlet, and a 120-volt twistlock.


  • It is RV-ready
  • Contains the electric remote control start functionality
  • Quality product by Champion
  • A lot of power for a mid-sized generator
  • Brownie points for customer service


  • Louder than most generators in its league
  • Heavier than the DuroMax generators

3 - DuroMax XP4400S

Rating: 4.2 / 5.0

Another quality product coming in from DuroMax, this is the newest model in the 4000 Watt range that is turning heads and is currently reigning in the market. This gas-powered generator surges at 4400 Watt and runs continuously at 3500 Watt. The internal specifications, such as the 4-gallon tank, running at 8-hour runtime, and an electric start are very similar to the DuroMax DS4000. Weighing at 116 pounds, the heavy-duty steel frame is pretty light as compared to other generators in its league. With two standard outputs to standard household appliances or light sources, each operating at 120-volt and 20-amps.

There is also an exclusive DuroMax RV switch for voltage selection, helping you get maximum power from each of the receptacles and pushing the buck from 120 volts to 240 volts when needed.


  • Low oil protection system; automatically shuts the operations of the generator
  • Quiet engine
  • Dual 15-amp circuit breaker to avoid any overload
  • Value for money at $456
  • Great power for the specifications


  • Frequent oil changes
  • You might face oil drip problems
  • Not compliant with CARB

4 - Generac 5778

Rating: 4.0 / 5.0

This 4000-Watt power horse by Generac is a 220cc OHVI engine marvel and one of the best generators out in the market. With 4500 surge wattage and 3600 Watts continuous supply, the Generac 5778 is complete with a full-wrap frame tubing that secures the internal frame and gives it a compact look. The control panel is illuminated for clear visibility and the 4.5-gallon tank ensures that the generator runs for a good 13-hour stretch at 50% load.

Using the Generac 5778, you can run a number of appliances, including your air-conditioner, refrigerator, and your other electrical appliances. It has 4 5-20R GFCI and 1 L14-20R outlets along with a 120/240 volts twistlock for power-up. Weighing a good 140 pounds, this mid-sized generator stays true to its functionalities.


  • Easy setup
  • Includes a maintenance kit
  • Has an oil and filter break-in period of 30 hours
  • Moderate noise level
  • Great design
  • Reliable and trusted brand


  • Slightly expensive, though it does perform well
  • Rocker switch might be a nuisance
  • Cannot be charged during use

5 - Yamaha EF4500iSE

Rating: 4.9 / 5.0

A Yamaha product is known for its reliability and power, and this Yamaha product is no different. This generator puts up a quaint picture of an efficient system running at 4000 Watts and powering up using a 375cc OHV air-cooled 4-stroke engine, allowing a surge of 4500 Watts. Power requirements can be well adjusted to run @1000-2600 rpm, enough to power up a motorboat and get it going. The design is sleek and trendy and it also makes for a good storage option due to its size (30.7 x 24.3 x 27.2). Using gasoline, the 4.5-gallon tank can power up your appliances and home for a running time of 15.2 hours when used at 25% load.

The Yamaha EF4500iSE emits a moderate sound level at around 65-68 dB when it runs at a commendable load.


  • Clean power supply making it safe for different electrical appliances
  • Enough power for loaded equipment
  • Electric start and battery dependent
  • Easy setup and startup
  • Boasts of a noise block sound reduction system
  • CARB-compliant
  • 4-wheeled unit


  • Expensive at $3,322
  • Heavier than other generators in the same league


These 5 products are the best-in-class offerings within the power generator realm, which offers relief to anyone hunting for a great generator to satisfy their everyday needs. You don’t need to be an expert to get these machines started, and now, with the all-encompassing list, all you have to do is check your own requirements and go shopping. 

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