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Best 4000 Watt Generators

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In the event of a power outage or when no alternative energy sources are available, a generator can literally mean the difference between life and death.

They are often within the financial reach of most individuals and at the moment they are needed most they can provide steady power for extended periods of time. Even after only one blackout, most people find that it was money well spent to own a generator.

Different generators are better suited to different tasks, and in general, the more watts a generator has, the more noise it makes and the heavier it is.

There are techniques to silence a 4000 watt generator, but that doesn't mean it won't create noise. If a silent generator is out of your price range, a generator quiet box is another option to reduce the noise of a cheaper generator.

Check out what I think are the Top 8 best 4000 watt generators:

Westinghouse iGen4500

Westinghouse 4500 Watt Super Quiet Portable Inverter Generator, Remote Electric Start with Auto Choke, Wheel & Handle Kit, RV Ready, Gas Powered, Parallel Capable

The Westinghouse iGen4500 was our top pick for many reasons.

The fact that it is both subtle and robust is one of them. If you need a quiet generator that can yet power an RV, this is the one to look at.

It uses 3,700 watts to run but can kick up to 4,500. If you need a generator to run the air conditioner in your RV, the iGen4500 is your best bet. As a result, it can provide all of the energy needed for the massive RV.

Fuel capacity is up to 3.4 gallons, providing for a possible 18 hours of operation time, though this varies with load.

The generator's comprehensive LCD data display can be activated either by remote control or electric push button. The current power output, battery life, voltage, and fuel levels will be shown for your perusal.

This portable generator has a telescoping handle and an extra handle on top for convenient transport.

The iGen4500 has a noise level as low as 53 dBA during operation. Because of this, it's perfect for camping or doing other outdoor things.

Total harmonic distortion (THD) is used as an indicator of the "purity" of a portable generator's sinusoidal electric wave. Most portable generators have a THD of over 5%. The risk of damage to delicate electronic devices is increased.

However, the Westinghouse iGen 4500 is an inverter generator that produces clean power with a THD of less than 3%. This inverter generator can be used with sensitive electronics like computers, televisions, and mobile phones without risk.

You won't need any special adapters to plug in your portable generator to a standard RV's TT-30R 30 Amp outlet.

Along with the standard RV plug, this amazing inverter generator also features a pair of USB connections and a 5-20R 120VR Duplex outlet. Westinghouse backs their products with a 3-year guarantee and offers unlimited technical support for the duration of that time.

The inverter's weight is the only real downside, but considering the amount of power it produces, this is to be expected.

Pulsar PG5250

Pulsar 5,250W Dual Fuel Portable Generator with Switch and Go Technology, PG5250B

If you're looking for a powerful and reliable 4,000-watt generator, go no further than the Pulsar PG5250. This unit's 224cc OHV motor can produce 4250 watts while running and 5250 watts when first started.

This engine has a built-in safety feature that turns it off if the oil gets too low.

Once you turn on this machine, you'll notice that it's not exactly silent (it produces approximately 76 dBA) but it is not annoyingly loud either. With its 4 gallon (15 l) fuel tank, the Pulsar PG5250 can operate for 8.5 hours at 50% load.

In addition, there are four different types of outlets on this generator: You'll only find one 120 V 20 A (5-20R DUPLEX) plug, a single L14-30R Twist Lock 120/240 Volt AC 30 Amp Power Outlet, a single 30A 120V TT-30R RV plug, and a single 12V DC 12.3-amp outlet

When compared to other 4,000-watt generators, this Pulsar model has the lightest dry weight at around 99.5 lb (45.13 kg). Due to the machine's small size and being lightweight, transporting it is a breeze.

To purchase a Pulsar PG5250 won't break the bank. Therefore, it is a good option for people who need a lot of power but have a limited budget. Electric current (AC) and direct current (DC) plugs are available. In addition, it is equipped with useful components including a spark arrestor, muffler, and fuel gauge. 

However powerful it is, this generator does have a few downsides. No outlet covers are present. The absence of an electric starter and electronic fuel injection systems are also notable features missing.

Firman 3650 PO3601

If you're in the market for a generator and want the longest possible runtime, the Firman 3650 Watts PO3601 should be at the top of your list.

With its massive five-gallon tank and 14-hour duration, you can leave this running all night and still use it in the morning.

With a running power of 3650 W and a peak output of 4550 W, the Firman PO3601 beats several of the other generators we considered. If you want to run your air compressor and belt sander in your workshop without having to rely on the power grid, this is a great option.

The PO3601 has four different types of AC outlets, including the 30-amp twist-lock receptacle that is necessary for RV hookups (TT-30, 120 V). The control panel provides a wealth of information, such as the generator's total lifetime hours, voltage, frequency, and an integrated fuel indicator, to quickly check the generator's supply.

All in, it is just a very solid generator which I like. 

Predator 3500W

GCD Fits Predator Inverter 3500 watt Generator Cover (Black) Cover ONLY

Fantastic LCD display with numerous controls; robust build; relatively quiet operation is to be expected.

Predator is, without a question, making a name for itself as a formidable rival in the generator market. They have a number of silent alternatives, and this seems to be their main selling point.

Even though it only has an 11-hour lifespan at 25% capacity, it's a convenient pick because of its small size. You can roll it anywhere you need to go, and the adjustable settings help you get the most out of your power supply.

Predator does an excellent job with the machine's settings and general design. A digital LCD display lets users know if the machine is low on oil, has reached capacity, or requires maintenance. Some controls can be easily adjusted with the click of a button. 

This generator is more advanced than the standard model, so its price may be higher than some individuals are willing to spend.

Durostar DS40000S

The Durostar DS4000S is an excellent choice if you're looking for a portable 4-thousand-watt generator. It has a 4-gallon tank and a frame that is 24" by 17" by 17".

Its hefty weight of 94 pounds is especially noticeable given that it has no wheels. The decibel level is a little high at 69. However, the volume is manageable thanks to an integrated muffler.

The air-cooled engine has a shorter operating time than other variants (only 8 hours), although it uses the same amount of fuel.

However, it is in accordance with EPA standards. The generator comes with a few extra equipment like a spark plug wrench and an oil funnel. There are two 20-amp outlets and one 30-amp outlet, each powered by 120 volts. There's a limited warranty on it for three years.

Champion 4000W RV Ready

Champion Power Equipment 100302 4000-Watt RV Ready Open Frame Inverter, Yellow

To those in search of a cheap and powerful 4000 watt inverter generator for use with home appliances and sensitive electronic equipment, it is a terrific and powerful option.

The generator has an operating wattage of 3,500 and a surge wattage of 4,000. Fuel capacity is 2.9 gallons, and in economy mode, it can travel for up to 17 hours.

It has a low-oil sensor to prevent damage to the engine and turn off the portable generator automatically.

This inverter can generate sound up to 64 dBA from a distance of 23 feet, which is slightly louder than a group of people having a conversation.

It has a Quick Touch Panel to make navigating the interface a breeze.

Two 120V 20A household outlets with less than 3% THD for sensitive equipment and two 12V DC outlets with twin USB adapters are included in the Champion. 

You can get more juice out of it by hooking up another inverter using a parallel kit. Thanks to this approach, you'd have access to an astonishing 8,000 starting watts.

Champion offers a 3-year guarantee and unlimited technical assistance.

In terms of power output, it is right up there with the best of the 4000 watt models on the market today. As with any Champion Power Equipment product, this inverter generator is a safe bet.


A-iPower SUA5000 - 5000 Watt Portable Generator Small Gas Powered For Jobsite, RV, and Home Backup Emergency

This generator features a gasoline-powered 223cc OHV 4-stroke engine that produces 4,250 operating watts and 5,000 starting watts. Furthermore, this mechanism protects against an automatic shutdown due to low oil and automatically manages voltage, making for cleaner electricity.

Since the SUA5000 model only makes 68 dB of noise, it is very quiet when in use. It has a decent 6 hours of operating time at 100% load, thanks to its steel 4 gallon (15 l) fuel tank, and 9 hours at 50% load.

This generator is lightweight and easy to move thanks to its mobility kit and dry weight of just 123 pounds (54 kilogrammes).

That this A-iPower generator includes protected plugs for both AC and DC power is really convenient. Also, it comes with a plug adaptor that may be used in a recreational vehicle. The numerous beneficial features include a fuel gauge, steel gas tank, manual fuel shutdown valve, muffler, and spark arrestor.

Given the low price, it's hardly unexpected that this gadget doesn't come with a battery or electric starter. Electronic fuel injection and an automatic idle adjustment system are also features that are also absent from this model.

If you're looking for a generator that won't break the bank but yet produces a lot of power and serves multiple purposes, the A-iPower SUA5000 is a fantastic alternative.

Duromax XP4400E

DuroMax XP4400E Gas Powered Portable Generator-4400 Watt Electric Start-Camping & RV Ready, 50 State Approved, Blue/Black

The Duromax XP4400E has a robust engine, making it ideal for uses like camping and emergency circumstances in which electricity is interrupted.

This generator uses gas as fuel and has a 3.96-gallon fuel tank. The low fuel consumption is a major selling factor for this generator.

A total of 12 hours of use can be expected at 50% capacity. The Duromax XP4400E is authorized for use in California and in national parks since it follows all applicable EPA and CARB guidelines.

It weighs 120 pounds but can be moved around easily thanks to wheels and a carry handle. The continuous output of this generator is 3,500 watts, and its maximum output is 4,400 watts.

It uses a turnkey for an electric start instead of a recoil starter, unlike many other variants.

There are three plugs total: two standard 120V 20A outlets and one 120/240V 30A RV twist lock plug. There's an oil funnel, DC wires, a toolkit, and a wrench for the spark plugs.

This generator has some drawbacks, such as its large weight due to the size of its engine and its inability to charge delicate electronics safely.

Final Thoughts

Getting recommendations from people who use your generator in a similar way is a great way to find the best generator.

Those who frequently hit the road in an RV are likely to have a group of buddies who share their passion. One of your friends or family members probably just acquired a generator and can offer advice on how to utilize it.

If, however, you have trouble finding a reliable person to take some advice from, this article is for you. Having done the necessary testing and investigation, I am convinced that the best generator for you can be found among these options.

About Tom Bell

Hey, I’m Tom, the owner of Generator Reviews! I built this website to help you get the very most out of your generator and select the correct one for your personal circumstances. This site contains reviews of virtually every generator, detailed buying guides, as well as maintenance advice to help you keep yours in tip-top shape!


Generator.Reviews is an independent review business. I am not affiliated with any manufacturers and do not accept paid reviews. When you buy through my links, I may earn a commission which helps me to maintain this website and keep the reviews coming your way!

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