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DuroStar DS4000S Spec Review

The DuroStar DS4000S is a compact open frame generator with a rated wattage of 3300 W and a starting wattage of 4000 W.

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Description

The DuroStar DS4000S 4,000 Watt Generator is designed for light duty emergency backup applications. This Generator has everything a Great Generator needs, but at a price that everybody wants. (source: DuroStar (opens in a new tab))

Zoom on the DuroStar DS4000S

In summary, the DuroStar DS4000S is a compact portable generator especially useful for:

  • RV travellers looking for even more independence
  • People occasionally participating in sporting competitions, open-air performances and outdoor festivals
  • DIYers who wish to improve their efficiency with tools
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout

In the following paragraphs, we shall explore the power characteristics, available outlets, portability, and any additional features of the device, along with its emission compliance information.

Power & Run Time

The DuroStar DS4000S in use

The DuroStar DS4000S

The DuroStar DS4000S's core is the 208 cc (7 hp) DuroStar OHV 4-stroke engine, which runs on gasoline. With an output of 120V, it provides a running wattage of 3300W and a peak wattage of 4000W.

Enjoying a noise rating of 69 dBA (less noisy than background music), this generator gets running thanks to a conventional pull-start mechanism.

The fuel capacity of 4 gallons allows the DS4000S to operate for around 12 hours at 50% load with a full tank (fuel consumption around 0.33 GPH).

As the DS4000S has a relatively high THD (<12%), it is not recommended to use it to power sensitive electronic devices.

Outlets

The control panel features the upcoming 3 AC outlets:

Duplex 120V 20A (5-20R)
120V 30A (L5-30R) receptacle

Even though this DuroStar generator isn't quite RV Ready, its L5-30R receptacle allows an easy RV connection via an L5-30P to TT-30R adaptor.

Portability

The DuroStar DS4000S has the following dimensions: L23 x W18 x H17.5 in. In combination with its conventional, open frame design, they provide support and allow the generator to be raised above ground level. The design is ideal for rough environments and demanding outdoor use.

The DS4000S's dry weight of 94 lbs lets you use its power anywhere needed. In addition, it is even easier to grab and move the generator around thanks to its open frame design.

It is also possible to purchase the official wheel kit (opens in a new tab) to help you transport the DS4000S more easily.

Features

Panel of the DuroStar DS4000S

The DS4000S's control panel

The control panel of the DS4000S includes a convenient voltmeter, which provides an easy way to monitor power output anytime, helpful for the monitoring of its status and activity.

In addition to this info, a light indicator serves to show you when the oil level is too low.

The fuel level of the generator can be determined quickly, easily, and conveniently with the help of its built-in fuel gauge.

From a security point of view, the generator is equipped with an overload protection (circuit breaker) and an automatic low oil shut-off, giving you a peace of mind during use.

With the basic documentation and an owner's manual (opens in a new tab), letting you start the generator quickly, the DuroStar DS4000S also comes with several accessories, including: tool kit and funnel. An official storage cover is also available, as a separate purchase.

Emissions

The DuroStar DS4000S is EPA-approved and CARB-compliant. Therefore, its sale and purchase are permitted in all of the 50 states, including California.

Moreover, it features a spark arrestor and therefore, can be used in forested areas.

Product Videos

The DuroStar DS4000S versus other generators

The following charts are provided to give you an idea of how some of the key specs of the DuroStar DS4000S compare to generators of similar power (between 2500 and 3500 W).

  • At a weight of 94 pounds, the DuroStar DS4000S places in the expected weight range of the generators in the 2500-3500 rated wattage range. If you are concerned by weight, one of the champions in the above-mentioned power range is the Generac GP3300i, with a dry weight of just 59.5 pounds.
  • As this generator can emit noise as low as 69 dBA, it finds itself in the average expected noise for this kind of power. If noise emissions are one of your priorities, you may be interested in the Honda EU3000iS, one of the least noisy generators similarly powerful as this one, rated for 50 dBA.
  • The DS4000S, falls within the average autonomy range compared to generators of a roughly same power, with a run time of around 12 hours at a 50% load and a full tank. If you consider autonomy on a single full tank as one of the deciding factors, one of the generators in the same power range that offers the highest run time is the Predator 4375, with around 16 hours.
  • While the run time is an important parameter, it is dependent on the fuel tank’s capacity and thus, doesn’t say much on its own unless we consider fuel consumption as well. As this generator uses an estimated 0.33 GPH (gallon per hour) at a 50% load, it finds itself in the average gasoline consumption range of similar products. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.17 GPH, the Westinghouse iGen4200 is a device you should look out for.

Price comparison

As you can see from this interactive chart, when compared to other 2500-3500W generators, the DuroStar DS4000S is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget generator.

The bottom line

STRENGTHS:
  • Inexpensive
  • Several accessories included
AVERAGE SPECS:
  • Decent weight (94 lbs)
  • Acceptable noise (69 dBA)
  • Decent run time
  • Decent fuel efficiency
WEAKNESSES:
  • No electric start

Do you own the DuroStar DS4000S and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
PortableYes
Parallel capableNo
RV readyNo
FuelGasoline
Engine208 cc DuroStar OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120V 60 Hz
Running watts3300 W
Starting watts4000 W
Running amps27.5 amps
Peak amps33.3 amps
Run time @50% load12 h
Run time @25% loadUnknown
Features
GFCI outletsNo
Covered outletsNo
Automatic Voltage RegulationYes
AC outlets
  • 1x Duplex 120V 20A (5-20R)
  • 1x 120V 30A (L5-30R)
DC outletsNo
Data centerVoltmeter
IndicatorsLow oil
Fuel tank4 gal
Fuel gaugeYes
Misc
Weight94 lbs
Approx. dimensions (L x W x H)23 x 18 x 17.5 in
Noise (lower limit)69 dBA
THD< 12%
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralFloating
Accessories includedFunnel and tool kit
Warranty3 years

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

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About DuroStar

The DuroStar brand belongs to DuroMax, a company founded in 2003 and based in Ontario, California. DuroStar generators usually have a DuroMax twin, and only differ in their color scheme and in the factory in which they were produced. While DuroStar generators and engines are manufactured in China, the design and servicing centers reside in the US.

Warranty Information

The DuroStar DS4000S is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of DuroStar generators, please consult DuroStar's (DuroMax) warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-844-DUROMAX (844-387-6629).

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator sizer.
ItemRunning WattsStarting Watts
At homeRefrigerator (energy star)1921192
Hair dryer18001900
Printer600600
Pair of small speakers4545
Total2637 W3637 W
For campingRadiant heater13001300
RV refrigerator180600
RV AC (11,000 BTU)10101600
Radio100100
Pair of small speakers4545
Total2635 W3225 W
For workGrinder14002500
Disc sander12001200
Total2600 W3700 W

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