3 Best Portable Generator for Construction Site

For contractors with jobs to do but no access to power a dependable portable generator is helpful. 

Every job site is unique; hence, it’s vital that you understand your energy requirements before purchasing a portable generator. 

A user that runs a one-man show with basic appliances to power may not need exactly the same generator as another individual with a seven-man crew that work with a load of tools requiring 240V amperage.

In this article we’ll review the best portable generators for construction site:


Top 3 Best Portable Generators for Construction Site


Durostar DS10000E

The Durostar DS10000E is a heavy-duty generator on this ranking, which is sturdy enough to take the harsh abuse of a construction site. Taking just a look at the machine is enough to tell you that it was built tough.

The unit delivers enough juice to power just about any job site, putting out a power output of 8000 running watts & 10000 starting watts. This amount of wattage will keep the tools of your full crew running & charging throughout the day.

It comes with integrated, collapsible handles and rubber tires, which help you move the 260-lb generator to almost anywhere easily. The majority of job sites often secure their generators at night to avoid theft, and for this reason, having a convenient means to move it inside is a great advantage.

The generator packs an 8.3-gallon fuel tank, allowing you to enjoy 10 hours of runtime @ 50 per cent load. As the 16 HP OHV Durostar Engine only produces 72dB at 23ft away, you won’t need to worry about noise pollution.

There’s a wide range of different outlets, enabling you to plug up into the generator just about any piece of equipment you need at a site. But it only features two 3-prong outlets, without any covered outlets. This makes it not as competitive as the other units in this article.


  • 16 HP OHV Durostar Engine
  • Starting Watts: 10000W
  • Running Watts: 8000W
  • Weight: 260 lbs
  • 10 Hour Runtime at 50 per cent load
  • 3 Gallon Capacity Fuel Tank
  • 2 – 120V-20A GFCI Outlets
  • 1 – 120/240V 50A
  • 1 – 120/240V 30A L14-30R
  • 1 – 120V 30A Twist Lock AC Outlet
  • Sound Level: 72dB from 23ft away
  • Rubber Inflated Tires
  • Collapsible Transporting Handles
  • Recoil Start

This product has a 30-day replacement warranty, along with a full 1-year parts warranty for protecting your investment.


  • Durably Built
  • Affordable
  • 10-hr run time
  • Easy Transportation
  • Relatively Quiet



  • There are no covered outlets
  • No three-prong outlets


Westinghouse WGen7500DF

The Westinghouse WGen7500DF is a dual fuel generator built to run on either propane or gasoline. The unit supplies 7500 rated watts and 9200 peak watts, providing you with enough power to run multiple equipment and tools, allowing you to get through the workday.

The generator, which weighs 194 pounds (roughly 88kg), sports non-flat wheels and collapsible transporting handles — features that let you move the generator all around your construction site easily. They’re also used to move it out of the rain to store it indoors at the end of the day or during a sudden storm.

To keep your site powered all day long, you can exploit the dual-fuel mode, which will enable the machine to run on either gasoline or propane. The WGen7500DF gives you around 16hrs of runtime at 50 per cent load on either fuel.

It comes with covered outlets, which help vital generator parts stay safe from water, dust, and debris, common in construction settings.


  • 420cc 4 Stroke OHV Engine
  • Starting Watts: 9500W
  • Running Watts: 7500W
  • Weight: 109 lbs
  • 16-hr runtime at 50 per cent load
  • 6-gal. capacity fuel tank
  • 4-120V outlets (Household Style Outlets)
  • 1 – USB 5V Outlet
  • 1 – 120/240V 30A L14-30R Outlet
  • Dual Fuel
  • Westinghouse Smart Switch Ready
  • Sound Level: 74dB from 23ft away
  • Remote Electric Start
  • Covered Outlets
  • Non-Flat Wheels
  • Collapsible Transporting Handles

Westinghouse provides you with a 3-year limited warranty on this model, along with a 1-year unit exchange period as well as a 2-3 year replacement part coverage.


  • Dual Fuel
  • Electric Start
  • Covered Outlets
  • Up to 11-hr run time
  • Great safety features including low oil shutdown and overload protection



  • Expensive
  • A bit noisy

Duromax XP10000E

For job sites, you’ll require a generator built to last, to power all of your equipment and tools seamlessly, and that’s exactly what the Duromax XP10000E offers. It pumps out 8000 running watts & 10000 starting watts, which will power your construction site as and when needed.

The machine that has a noise level of just 72dB at 23 feet ensures you won’t have to worry about noise pollution since it‘s among the quietest on this ranking. Apart from that, the unit also has a Dual fuel, Hybrid version.

If you often need to move the generator, that’s no problem at all with the P10000E’s rugged tires and collapsible transporting handles that facilitate easy movement around the site. It has an 8.3- gallon tank, enabling you to run the generator for up to 10hrs at 50 per cent load for keeping you powered up all day long.


  • 16 HP OHV Engine
  • Starting Watts: 10000W
  • Running Watts: 8000W
  • Weight: 249 lbs
  • 10-hr runtime at 50 per cent load
  • 3-gal capacity fuel tank
  • 1 – 120/240V 30A L14-30R
  • 2 – 120V-20A GFCI Outlets
  • 1 – 120/240V 50A
  • 1 – 120V 30A Twist Lock AC Outlet
  • Collapsible Transporting Handles
  • Sound Level: 72dB from 23 feet awayCovered Outlets
  • Recoil Start
  • Rubber Inflated Tires

The company gives a 3-year warranty for the original buyer of the XP10000E.


  • Affordable
  • Quiet Operation
  • 10-hr runtime
  • 3-yr warranty



  • There are no covered outlets
  • Heavy



All Power America 10000 Watt Generator

When working on a construction site, a vital aspect of getting your job done is finding a generator, which is user-friendly and can easily power multiple tools. This All Power America Generator can handle a heavy workload in an easy-to-transport package. It makes use of a 15hp 420cc OHV engine to supply 8000 rated watts & 10000 peak watts, which will have your entire crew powered up on their appliance and tools.

With the rubber wheels & collapsible transporting handles, you can move the generator, which weighs 235lb, easily to anywhere you need it. It has an 8-gallon fuel tank, enabling you to work all day with the 9-hr run time at 50% load.

Since the noise level is only at 76dB, you won’t need to worry about noise pollution since it’s relatively quiet in comparison with the larger-sized generators.


  • 420cc 15 HP OHV Engine
  • Starting Watts: 10000W
  • Running Watts: 8000W
  • Weight: 235.4 lbs
  • 11 Hour Runtime @ 50% Load
  • 8 Gallon Capacity Fuel Tank
  • 1 – 120V 30A Twist Lock AC Outlet
  • 4 – 120V-20A GFCI Outlets
  • 1 – 12V DC
  • 1 – 120/240V 30A L14-30R
  • Hour Meter
  • Sound Level: 76dB from 23ft away
  • Collapsible Transporting Handles
  • Electric/Recoil Start
  • Rubber Inflated Tires

This machine carries a 2-year warranty, allowing their customer service team to handle your complaints smoothly.


  • A wide variety of outlets
  • Affordable
  • 2-yr warranty



  • There are no covered outlets
  • Run time not as long as others
  • Heavy

Difference between Professional Use and Residential Use Generators

It isn’t all generators that are built for use on a construction site. The best portable generators for construction site all have most of these features in common:

Commercial Duty Engine

A commercial or industrial use engine offers you an improved lubrication system (pressurized versus splash) and more durable components with better heat dissipation (that prevent overheating during extended use). It also has automotive grade oil & air filters, low oil protection systems, along with better computer controlled ignition system.

Bigger Fuel Tank Yield Longer Run Time

An ideal generator for use on a construction site must come with at least 9hrs runtime. And the reason for this is obvious since such portable generators are required to be able to work for a whole day non-stop.

Electric Outlet Protection

Since construction sites will often be dusty, you might want to opt for one of the options above that features outlet protect, ensuring that the outlet will be protected from dust and dirt when the generator isn’t in use.

Heavy-Duty Wheels

The 3 best portable generators for construction site above are not lightweight, and they’re encased in heavy frames, sitting on pneumatic wheels, which make them easy to move around. For such commercial use, you’re going to want a machine that has a rugged design and durable wheels.

Ease of Maintenance

Another factor you need to consider when looking to buy a portable generator for a job site is ease of maintenance. We’ll give some maintenance tips for your generator in the FAQ section below.

What Are the Best Portable Generator Accessories?

Twist-lock RV style plugs are another common and beneficial feature of a lot of portable generators on this list. Depending on the application, the 120-volt 30-amp outlets can be connected to the RV or home to offer power for the needs of your tools and appliances on the job site.

This can be a perfect solution to provide you with a convenient, easy way to connect to electricity on your construction site. Twist-lock & RV style plugs have other uses apart from merely supplying 120V power to the RV or home with adapters such as the following:

  • Twist-lock plug to standard household outlet: The product is, AC WORKS L5-30 30Amp 3-Prong Locking Generator Distribution Cord (1.5FT L5-30 to Tri-household Flexible)
  • RV Plug male to standard household female outlet pair: This product, Coleman Cable 01915 3-Feet Generator Power Cord Adapter, 10/3 Splitter Y Adapter, L5-30P to (2) Lighted 5-20R

This kind of adapters (if they’re not available in the unit you bought) can really expand the usefulness of the generator. With access to power from every one of the 120V outlets on your generator, you can use more of its capacity to enjoy more out of the machine. This lets you run more appliances and provide power support for your crew.

Also Read: Best Portable Generators [2022]

Generator Types

Apparently, different job sites will demand different generator sizes. If you’re getting a generator for commercial applications, there are at least 3 types of generators you need to consider:

Small backup units (1000 – 5500W): If you’re primarily doing small jobs or those that need just 1 or 2 power tools working simultaneously, then these generators are ideal for you. The units can be easily carried around your workplace and don’t occupy too much space.

Semi-professional generators (3500–10000W): These units are recommended as a high-end backup power source for homeowners and also for contractors that need frequent use of power tools on their job site. This kind of generators often makes use of heavy-duty engines, including longer-lasting components than smaller generators. Also, they have a number of extra features, which are ideal for contractors. Most units reviewed above can be grouped under this category. Below, we’ve looked at how to estimate the power requirements of the tools and appliances on your construction site to know the suitable semi-professional generator to choose.

Professional heavy-duty units (2500–15000W): These generators are great for use on any construction and job sites. While they’re professional, heavy-duty machines may not be quite portable like other generators. Fortunately, there are different portable generators for construction site on the market falling under this category, some of which are reviewed above. They’re built to withstand the harsh conditions of your site, supply stable power for extended shifts, and also provide you with all the necessary features every tool requires.

Key Factors That Determine the Best Portable Generator for Construction Site

Check Your Power Needs

When looking for a generator to buy for commercial use, the first thing to do is to assess the amount of power you’ll actually need. To do this easily, simply list all power tools and electronic appliances you think you’ll need to use simultaneously to complete your job successfully.

Once you’ve done the listing, now take these following steps:

  • Write info from name tags on needed running & starting watts for each of the power tools into a table (as shown in the below example)
  • Now, add up all the running watts needed for operating your appliances
  • Then, find the item that has the highest additional starting watts
  • Add the number to the total running watts
  • Add 10 per cent to each number as a safety margin
  • The final figure is the total amount of starting watts that your generator will have to supply

Bear in mind that certain electric appliances you’ll be using may not have their running watts specified on their data tags. If this is so, you can use the equation below to estimate the required running watts:

Watts (W or kW) = Volts (V) x Amps (A)
Amps (A) = Watts (W or kW) / Volts (V)

So long you’ve the required volts and amps, you can convert them easily into an estimate of the required running watts.

Fortunately, there’s a device known as appliance load tester, which you can buy to know precisely how many watts each appliance consumes. Once you can get this tool, you’ll be able to avoid all that physics equation. As soon you’ve been able to determine your total running & starting watts, you also need to take average output capacity into account.

Regular Maintenance

Many building contractors don’t know the value of preparing a good maintenance plan for your equipment in advance. Once you do can this, you could cut down on chances of unexpected downtimes to the barest minimum. The maintenance of your best portable for construction site should be done by an expert.

If you own a professional heavy-duty generator at your site, the best thing could be to leave the execution of your maintenance plan to an expert with the right knowledge and experience to help keep your machine in a good shape.

Storage Requirements

Storing your generator set may not be as straightforward as it may seem from the outset. The most comfortable method you can use for storing the machine is to utilize a wheel kit & a foldable handle for moving your generator around easily. And if your unit doesn’t have these features, you might need to get them.

You also need to bear it in mind that if you’ll be storing it for a longer period of time, then consider either draining all the gas from the generator set or putting a fuel stabilizer into the tank, leaving it to run for a while. Otherwise, the gas inside the tank will become bad and will produce gum deposits, which will clog the machine’s carburetor.

When you’re draining the fuel, a manual fuel-shutoff switch is handy as you’ll find it to be a very practical feature.

Automatic idle control or smart throttle

Construction tools don’t run continuously since there’ll be times you need to take a break or use manual tools. The best portable generator for construction site should have Smart Throttle (also called an automatic idle control or the Eco-Throttle).

This mode will help you save a lot of fuel costs and cut down on the noise from the generator. Also, the option allows the generator to be able to adapt the rotations of the engine based on the actual load.

Local Laws & Regulations

Before you purchase a generator, we recommend that you find out whether there are local laws & regulations in the area, where your construction site is located, which could limit the number of generators you can select from. In some states, municipalities, and areas, there are limits on the highest allowed noise (noise pollution), while in others, there are limits on the maximum allowed amount of air pollution.

You can make inquire about this issue from your local generator dealer. If they’re professionals, they can offer you every piece of legislation & regulation, which the generator requires to meet since you’ll be using it on your construction site.

Altitude of Your Construction Site

Many individuals underestimate the effects of altitude of a construction site on the performance of a generator. If you’ll be using the machine at higher elevations, it’ll deliver a lower performance.

As a rule of thumb, do note that engines lose around 3 per cent of their power for every 1,000ft of elevation. For this reason, if you’re getting the generator for a job in areas with high altitude, consider opting for a more powerful machine to offset the diminished output. Also, if your site is in high altitudes, you need to take low temperatures into consideration, too.

Carbon Monoxide

Unfortunately, even these days, a lot of people die yearly from carbon monoxide poisoning, which is occasioned by the wrong use of generators. Those individuals either underestimate or don’t realize the fact that fumes coming from their generators are poisonous.

And the worst part is carbon monoxide is a gas, which is odorless and colorless.

For this reason, you should never use your generator set within Enclosed Space or too close to your home or other people’s houses (with open windows and doors inclusive) because you could be poisoning yourself or other people inadvertently.

Also, you’ll want to make sure you’re not breathing in any poisonous exhaust fumes.. so we would suggest checking an Exhaust Extension for your generator. For detecting poisonous CO gas, please be sure to check out some of the best Carbon Monoxide Detectors.

Also Read: Best Portable Generators [2022]

Frequently Asked Questions About The best portable generator for construction (FAQs)

What essential maintenance does the portable generator for construction works need?

A generator that is ideal for use on construction sites needs oil refill when the level drops. Also, it requires oil change a number of times in a month. You’ll also have to tighten the screws & the bolts because the vibration of the machine can make them get loosened. Apart from that, considering applying grease to every moving part to prevent wear and tear.

How many watts do I require to power construction tools?

Power tools have a wide variety of shapes and sizes. This brings a wide assortment of wattage demands, which your particular construction site could need. As said earlier, check your inventory of tools that you’ve on a specific site and go through the wattage demands of each.

Now, add these up, put a little extra (like 10%) just for emergencies, and buy a generator set based on that number.

How good are Chinese brand generators?

While Chinese equipment and tools could seem like a gamble as a result of lower quality standards, there are quite a few Chinese generators that perform just as well as their American counterparts. If you’re in doubt, you can always go through their reviews and conduct extensive research from first-hand accounts before you buy one.

So, Which is Best portable generator for construction?

All of the generators discussed have more than enough power for most construction job-site needs.

But, which is the best?

The best generator is a personal preference depending on your usage needs and tastes.. but let’s dive into which generator is best for each area.


The best performing generator is the Westinghouse WGen7500DF with a maximum Wattage of 9,500 and run time up to 11 hours at 50% load.


The DuroMax XP10000E and DuroStar DS10000E are both tied for the lowest priced options.


The DuroStar DS10000E is the most lightweight at 129 lbs and comes with a wheel kit included.


The Westinghouse WGen7500DF has the best safety features including overload protection, low oil shutdown, and covered outlets. It’s also CARB compliant and comes with a 3 year warranty.


The DuroMax XP10000E and DuroStar DS10000E are tied for the least noisy at 72 dB.


Top 3 best portable generator for construction Sites

A reliable generator is a vital tool for contractors that have jobs to do but limited access to power.

We believe the best overall option to be the DuroStar DS10000E due to its combination of affordability, portability, and lower noise level. It also has a pretty high run time of up to 10.4 hours at 50% load.

The Westinghouse WGen7500DF has the longest run times and the best safety features.


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