10 Best 4000 Watt Generator of 2025

Tested and Reviewed: Top 10 4000 Watt Generator deals with expert ratings from 8.1 to a perfect 10

July 2025 Edition

Editor's Choice

9.7

Westinghouse

Westinghouse 4000 Peak Watt Super Quiet Dual Fuel Portable Inverter Generator, Remote Electric Start, Gas & Propane Powered, RV Ready, CO Sensor, Parallel Capable

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Editor's bottom line:

“This 4000 watt generator is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

4000 Peak Watts and 3300 Rated Watts at Less Than 3% THD Telescoping Handle Gas or Propane Powered Remote Start With Included Key Fob, Electric and Recoil Start
Features a 520R 120V Duplex Household Outlet, an RV-Ready Tt-30R 30 Amp Outlet and Two USB Outlets Great Choice for Travel Trailers or Home Use with Automatic Low Oil and Carbon Monoxide (CO) Shutdown Strong Enough to Run All Your Essentials
Led Data Center: Rotating Digital Display Shows Fuel Level, Power Output, Remaining Run Time, Voltage Output, and Lifetime Hours
Extremely Quiet, Extremely Fuel Efficient: as Low as 52 dBA Noise Output and Up to 7 Hour Run Time on a 1.69 Gallon Gas Tank Features Economy Mode for Maximum Fuel Efficiency
All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contain Minimum Residual Oil and/or Fuel Odor; EPA Compliant; Backed By 3-Year Limited Service, Labor, and Parts Coverage and Nationwide Customer Service Network

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Picked by 205 people today

9.5

Save 22%

Champion Power Equipment

Champion Power Equipment 4000-Watt Dual Fuel RV Ready Portable Inverter Generator with Quiet Technology and CO Shield

22% OffFree Shipping

Main Highlights

Operate your 4000-watt portable generator right out of the box on either gasoline or propane, plus features CO Shield carbon monoxide auto shutoff system
With an ultra-quiet 64 dBA from 23 feet, enjoy 4000 starting watts, 3000 running watts and up to 10 hours run time on gasoline, and 2700 running watts and up to 25 hours on propane
The optional, sold-separately parallel kit enables this inverter to connect with another Parallel Ready Champion Inverter or Power Station for more power and longer run time
Includes a 120V 25A TT-30R outlet, a 120V 20 A household duplex outlet (5-20R) with clean electricity (less than 3% THD), plus a 12V automotive-style outlet, and Parallel outlets
Includes 3-year limited warranty with FREE lifetime technical support from dedicated experts

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9.5

WEN

WEN 56477i 4800-Watt Portable Inverter Generator, 72.7 pounds

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Main Highlights

224cc engine generates up to 4800 surge watts and 4000 rated watts
Produces clean power to prevent damage to sensitive electronics such as smartphones, tablets and laptops
Ultra-efficient 1.9-gallon tank provides up to 7 hours of half-load run time
Fuel shutoff maximizes the generators lifespan by using up the remaining fuel in the carburetor before shutting down
Includes onboard wheels, a telescoping pull handle, four three-prong 120V receptacles, one TT-30R RV receptacle, one 12V DC receptacle, two 5V USB ports, and a three-year warranty

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9.2

Save 10%

Champion Power Equipment

Champion Power Equipment 4000-Watt RV Ready Portable Inverter Generator with Quiet Technology and CO Shield

10% OffFree Shipping

Main Highlights

At less than 49 pounds, this inverter is one of the lightest 4000-watt inverters in the industry
64 dBA from 23 feet is perfect for camping, tailgating or to backup a few home essentials, with 4000 starting watts, 3000 running watts and up to 10 hours run time, plus features CO Shield carbon monoxide auto shutoff system
The optional parallel kit enables this inverter to connect with another 4000-watt Champion inverter to double your output power
Includes a 120V 25A TT-30R outlet, a 120V 20 A household duplex outlet (5-20R) with clean electricity (less than 3% THD), plus a 12V automotive-style outlet, and Parallel outlets
Includes 3-year limited warranty with FREE lifetime technical support from dedicated experts

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Best Value

9.0

Save 24%

Pulsar

Pulsar PGD40ISCO Ultra Light Quiet 4000W Portable Gas Inverter Generator

24% OffFree Shipping

Main Highlights

51 lbs [Extreme light weight]
12oz gas tank, 4.5 hrs run time @ half load
3200W Rated / 4000W Peak
RV ready, AC ready, Fridge ready

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8.8

Save 8%

WEN

WEN 3600-Watt Portable Inverter Generator, RV-Ready, Quiet and Lightweight with Fuel Shut Off (56360i)

8% OffFree Shipping

Main Highlights

149cc engine generates up to 3600 surge watts and 2900 rated watts
Produces clean power to prevent damage to sensitive electronics such as smart phones, tablets and laptops
Ultralight body weighs in at a mere 46 pounds for easy transport and torage
Fuel shutoff maximizes the generators lifespan by using up the remaining fuel in the carburetor before shutting down
Includes two three-prong 120V receptacles, one TT-30R RV receptacle, one 12V DC receptacle, two 5V USB ports, and a three-year warranty

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8.6

Aceup Energy

Aceup Energy 4000 Watt Portable Inverter Generator, Gas Powered Generator Quiet for Home, RV-Ready, EPA Compliant

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Main Highlights

149cc 4-stroke OHV engine produces 4000 peak watts and 3200 rated watts with recoil start for up to 5 hours at half-load on 1.32 gallon, 60Hz
Intelligent gauge keeps track of voltage, run-time, gasoline meter, hertz and power output, plus feature low oil led and economic mode to save fuel
Includes 120V AC one 20A outlets, one RV receptacle, one 12V DC 8.3A car charger outlet; Parallel ready to connect 2 generators for twice the power (parallet kit sold separately)
5-in-1 Knob:fuel on/shut-off, engine on/off, choke; When turning off the engine, the fuel switch is turned off at the same time, which avoids the risk
Produce clean power required by sensitive electronics such as phones, TV; Fully-enclosed design reduces noice level
All generators are functionally tested in the factory to guarantee quality with EPA compliant; Backed by a 2 year limited and lifetime technical guidance from experts

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8.3

Westinghouse

Westinghouse Outdoor Power Equipment 4650 Peak Watt Portable Generator, RV Ready 30A Outlet, Gas Powered

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Main Highlights

3600 Running Watts and 4650 Peak Watts; Recoil Start; 4 Gallon Fuel Tank With Fuel Gauge; Up to 14 Hours of Run Time Per Tank
Features One 520R 120V Household Duplex Receptacle, One RV-Ready TT-30R 30 Amp Receptacle, and One L5-30R 30 Amp Receptacle; All Outlets Have Rubber Covers for Added Safety
Plug-and-Play: Comes With Oil, an Oil Funnel, a Tool Kit, and a Users Manual to Get You Started Right Out of the Box (Minimal Assembly Required)
Powered by a 212cc Westinghouse 4-Stroke OHV Engine Featuring a Long-Lasting Cast Iron Sleeve With Automatic Low Oil Shutdown
All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contain Minimum Residual Oil and/or Fuel Odor; EPA Compliant; Backed By 3-Year Limited Service, Labor, and Parts Coverage and Nationwide Customer Service Network

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8.1

Westinghouse

Westinghouse 4650 Peak Watt Portable Generator, RV Ready 30A Outlet, Gas Powered, CO Sensor

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Main Highlights

3600 Running Watts and 4650 Peak Watts; Recoil Start; 4 Gallon Fuel Tank With Fuel Gauge; Up to 14 Hours of Run Time Per Tank
Feature Two 520R 120V Household Duplex Receptacle, One RV-Ready TT-30R 30 Amp Receptacle, and One L5-30R 30 Amp Receptacle; All Outlets Have Rubber Covers for Added Safety
Plug-and-Play: Comes With Oil, an Oil Funnel, a Tool Kit, and a Users Manual to Get You Started Right Out of the Box (Minimal Assembly Required)
Powered by a 212cc Westinghouse 4-Stroke OHV Engine Featuring a Long-Lasting Cast Iron Sleeve With Automatic Low Oil and Carbon Monoxide (CO) Shutdown
All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contain Minimum Residual Oil and/or Fuel Odor; EPA Compliant; Backed by 3-Year Limited Service, Labor, and Parts Coverage with Nationwide Customer Service Network

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8.1

Oxseryn

Power Equipment 4000 Watts Inverter Generator Gas Powered, Portable Open Frame Generator, with ECO Mode and Quiet Technology, RV Ready, Emergency Home Backup

Main Highlights

: 4000 peak watts and 3200 running watts, gas powered by 208CC 4-stroke OHV engine, perfect for RV camping and home backup.
- : Includes 2*120V AC ports, 1*12V DC port, 1*RV port.
: Runs for up to 14 hours at 25% load with ECO mode, 2 gallon fuel tank with fuel gauge, allows you to check fuel levels at a glance, keeping you prepared.
: Under 72 dBA from 23FT away, this generator provides quiet, steady power for your home during a power outage or RV nights.
: Only 56lbs, easy to move around.
: All generators are functionally tested in the factory, there may be a slight smell of gas when you receive it. Don't worry about it, it's not second-hand.

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Our Best Overall Choice

Best Choice

9.7

Westinghouse

Westinghouse 4000 Peak Watt Super Quiet Dual Fuel Portable Inverter Generator, Remote Electric Start, Gas & Propane Powered, RV Ready, CO Sensor, Parallel Capable

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

4000 Peak Watts and 3300 Rated Watts at Less Than 3% THD Telescoping Handle Gas or Propane Powered Remote Start With Included Key Fob, Electric and Recoil Start
Features a 520R 120V Duplex Household Outlet, an RV-Ready Tt-30R 30 Amp Outlet and Two USB Outlets Great Choice for Travel Trailers or Home Use with Automatic Low Oil and Carbon Monoxide (CO) Shutdown Strong Enough to Run All Your Essentials
Led Data Center: Rotating Digital Display Shows Fuel Level, Power Output, Remaining Run Time, Voltage Output, and Lifetime Hours
Extremely Quiet, Extremely Fuel Efficient: as Low as 52 dBA Noise Output and Up to 7 Hour Run Time on a 1.69 Gallon Gas Tank Features Economy Mode for Maximum Fuel Efficiency
All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contain Minimum Residual Oil and/or Fuel Odor; EPA Compliant; Backed By 3-Year Limited Service, Labor, and Parts Coverage and Nationwide Customer Service Network

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