Best 4000-Watt Inverter Generator 2021 Reviews

Best 4000-Watt Inverter Genertors

Looking for the Best 4000-Watt Inverter Generator? You’re in the right place! Nowadays, if you don’t know anything about generators, you’re definitely living under a rock. Almost all campers, tailgaters, and RV users make use of generators. However, recently, more people have started opting for quieter and eco-friendlier options i.e. inverter generators.

Best 4000-Watt Inverter Generator 2021 Reviews:

Best 4000-Watt Inverter Genertors Reviews and In-depth Guide

How are inverter generators better than conventional generators? They utilize new and advanced technology in order to make power generation quieter and more fuel-efficient. This helps cut down on fuel costs and helps prevent pollution.

For large-scale use or even for home backup, people usually choose inverter generators with a power output of about 4000 Watts or more. If you’re in need of one too, we’ve made a list of the best 4000-Watt inverter generators to make this task easier for you. Let’s begin!

Best 4000-Watt Inverter Generator 2021 Quick Overview:

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Champion 100302

Best 4000-Watt Inverter Generator for RV

The first product on our list of the best 4000-Watt inverter generators is the Champion 100302, with an astounding starting power of 4000W and running power of 3500W. On top of this unit, there are two handles that make it easier for you to carry it around.

It comes with a specialized TT-30R outlet which makes sure that it can easily be used in an RV so that you always have power on the go. Another great perk of this unit is its parallel capability. It comes with a parallel kit that you can use to parallel connect it with an inverter rated at 2800W or more.

For its high-power output, the Champion 100302 has a super quiet operation with noise levels at a mere 64 dba. The unit can hold up to 2.9 gallons of gas and has run times of up to 17 hours which is one of the longest on this list.

It also features an eco-mode which helps make the operation much more fuel-efficient. It has a recoil start similar to many other inverter generators. THD levels are quite low so you can safely power electronics using this inverter generator. Finally, it is backed by a 3-year warranty with great customer service.

On the downside, the unit is quite heavy and does not come with wheels.

All in all, the Champion 100302 is one of the best 4000-Watt inverter generators and offers durable power generation for extended periods.


  • Colour: Black and yellow
  • Dimensions: Not mentioned
  • Weight: 81 pounds
  • Wattage: 4000W (surge), 3500W (running)
  • Outlets: 1x 120V 30A RV, 2x 120V 20A, 1x12V with USB adapter
  • Engine: Not mentioned
  • Fuel tank capacity: 2.9 gallon
  • Run time: 17 hours
  • CARB compliant: Yes
  • Warranty: 3 years


  • 64 dba noise levels
  • Two handles
  • Parallel capability
  • Eco-mode
  • Low THD
Champion 4000-Watt RV Ready DH Series Open Frame Inverter with Quiet Technology (Pack of 1) infographic

  • Durable
  • Quiet
  • Efficient
  • RV ready
  • Heavy

Westinghouse iGen4500DF

Best Quiet Inverter Generator

The next product on our list is the well-rated and excellent Westinghouse iGen4500DF manufactured by the very well-known Westinghouse. This is basically a dual fuel generator that operates propane which makes it easier for you to run it as you always have an alternate option available in case one fuel is not available. Also, propane is much more efficient than gasoline which helps cut down on fuel costs and helps generate great power output with reduced fuel usage.

Along with being dual-fueled, the Westinghouse iGen4500DF also features three separate starting systems, namely electric start, recoil start, and key fob. This makes it much easier for you to start up the unit and in case one system is not working, you can use the other. This unit also features an efficiency mode which helps optimize fuel usage and makes the operation much more efficient.

It also has a control panel that has a variety of controls ranging from indicators and GFCI-protected outlets to the data center and breakers etc. Surge power is rated at 4500W while the rated power is about 3700W. Noise levels are super quiet at 52 dba and run times last up to around 18 hours. Being EPA, CARB, and USFS complaint, the unit is quite eco-friendly and also comes with a 3-year long warranty.

However, it is quite expensive so it might not fit in your budget.

If you’re willing to make a big investment, the Westinghouse iGen4500DF will prove to be an efficient and productive purchase.


  • Colour: Black and blue
  • Dimensions: 18 x 10 x 15.5 inches
  • Weight: 93 pounds
  • Wattage: 4500W (surge), 3700W (running)
  • Outlets: 1x 120V 30A RV, 2x 120V 20A, 2x USB ports
  • Engine: 224cc
  • Fuel tank capacity: 3.4 gallon
  • Run time: 18 hours
  • CARB, EPA and USFS compliant: Yes
  • Warranty: 3 years


  • 52 dba noise levels
  • Economy mode
  • Control panel
  • Dual fuel
  • Electric start, recoil start and key fob
  • Powerful
  • Multiple start systems
  • Long run times
  • Efficient
  • Expansive

Honda Eu7000is

Best Electric Inverter Generator

Honda has been manufacturing durable and efficient inverter generators for quite a long time. The Honda Eu7000is one of their quality products. The best quality of this inverter generator is its low noise levels which are at a mere 58 dba while the unit is operating at full power.

This is similar to a normal conversation, therefore; this will not cause a lot of disturbance if used indoors. It offers 18 hours long run times which means you can use it all day without having to refill the fuel. The unit is quite portable due to its lightweight and compact design so you can easily move it around.

The Honda Eu7000is has a 289cc engine that delivers a surge power of 7000W and a rated power of 5500W. This heavy-duty power output can be used for a variety of applications at the same time. There are two 30A locking outlets on the front panel which offer 250V to appliances. This unit features a simple push start in order to make it easier for you to operate it. Added efficiency is offered by the eco-throttle system which optimizes engine speed in accordance with the load in order to reduce fuel usage. It is backed by a 3-year warranty and is also USDA and EPA compliant which makes it eco-friendly.

One issue with this inverter generator is its high price tag which might make it inaccessible for some users.

Other than that, we are all praises for the Honda Eu7000is and we would definitely recommend it to you.


  • Colour: Black and red
  • Dimensions: Not available
  • Weight: 51.3 pounds
  • Wattage: 7000W (surge), 5500W (running)
  • Engine: 389cc
  • Outlets: 2x 30A locking outlet
  • Fuel tank capacity: 5.1 gallon
  • EPA and USDA qualified: Yes
  • Run time: 18 hours at 1/4 load
  • Warranty: 3 years


  • 58 dba noise levels
  • Recoil and push-button start
  • Compact design
  • Eco-throttle system
  • Parallel capability
  • Light indicators
  • Portable
  • Easy start
  • Quiet
  • Long run times
  • Expansive

Pulsar PG4000iSR

Best Gas-Powered Inverter Generator

Next up, we present to you the Pulsar PG4000iSR which is available at an affordable price. If you’re on a tight budget, this one is a great choice for you among the best 4000-Watt inverter generators. A thin inverter generator uses gasoline as fuel and produces a peak power of 4000W along with running power of 3500W.

This power can easily power a microwave, refrigerator, and even a freezer simultaneously. It is run by a 224cc 4-stroke engine which is the reason for its powerful operation. The 3.4-gallon fuel tank offers run times of 15 hours at ½ load. There are also multiple power outlets on the Pulsar PG4000iSR’s panel which you can use to run multiple electronics at once.

The inverter technology helps the unit produce safe power for running sensitive devices and electronics without damaging them. The electric start feature makes it much easier for you to start up the system. This unit also has a low oil shut off which prevents damage to the inverter generator by shutting down the system when oil levels fall.

However, the power output is not indicated by the unit which is an inconvenience.

In conclusion, the Pulsar PG4000iSR offers efficient operation and is definitely among the best 4000-Watt inverter generators.


  • Colour: Gray
  • Weight: 48 pounds
  • Dimensions: 19.7 x 11.22 x 17.91 inches
  • Wattage: 4000W (surge), 3500W (running)
  • Engine: 224cc OHV 4-stroke
  • Outlets: 1x 120V 20A duplex outlet, 1x 120V 20A RV, 1x 12V DC, USB
  • Fuel tank capacity: 3.4 gallon
  • Warranty: 1 year
  • Run time: 15 hours at 1/2 load


  • Clean power with low THD
  • 63 dba noise levels
  • Electric start, recoil start
  • Low oil shut off
  • Reasonable price
  • Long run times
  • Efficient
  • Multiple outlets
  • Doesn’t indicate power output

Briggs & Stratton P4500

Best Electric Start Inverter Generator

The final product on our list of the best 4000-Watt inverter generators is the Briggs & Stratton P4500. With a price tag of just under $1000, this unit is definitely a solid choice. This unit features 4 20A outlets, 1 30A RV outlet, 1 120V outlet in addition to 2 USB ports. This unit produces very clean and stable power. As it prevents harmful surges, you can safely use it to power sensitive electronics.

A travel handle and a pair of wheels make the unit very convenient and portable. It delivers run times of 16 hours at quarter load which is long enough. The Briggs & Stratton P4500 adapts the engine speed according to the load. This makes the operation more efficient and also helps reduce fuel costs. Noise levels are as low as 58 dba which is similar to a normal conversation so it won’t be so distracting.

The protective shell on the unit not only offers protection to the system but also helps in muffling the noise. A very unique feature of this model is the CO Guard carbon monoxide shutdown technology which automatically shuts down the system if high levels of CO are detected around the generator.

On the downside, the unit is quite heavy which might affect its portability.

In short, the Briggs & Stratton P4500 is a great 4000-Watt inverter generator for all needs.


  • Colour: Gray and red
  • Weight: 114.8 pounds
  • Dimensions: 24.5 x 17.6 x 20.3 inches
  • Wattage: 4500W (surge), 3700W (running)
  • Engine: Not mentioned
  • Outlets: 4x 120V 20A duplex outlet, 1x 120V 30A RV, 2x USB ports
  • Fuel tank capacity: Not mentioned
  • Warranty: 2 years
  • Run time: 16 hours at 1/4 load


  • Handle and wheels
  • 58 dba noise levels
  • Energy efficient
  • Protective shell
  • CO Guard carbon monoxide shutdown technology


Frequently Asked Questions

Is it safe to use a 4000-watt inverter generator to run a TV?

Inverter generators with low THD levels can safely power a TV.

Will my 4000-watt inverter generator run my microwave?

Yes, it can easily power an inverter generator.

What is the highest wattage inverter generator?

Honda Eu7000is


Inverter generators are quieter, more energy-efficient, and more ecologically sound. Opting for this option instead of conventional generators is usually an intelligent decision. We hope our reviews helped you make a good choice!

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