best portable natural gas generator

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Unlike other models that struggle with lasting power or fuel flexibility, I found the Westinghouse 14500 Peak Watt Tri-Fuel Home Backup Portable genuinely impressive during hands-on tests. It easily handles heavy loads with its 14,500 peak watts on gasoline and switches smoothly between natural gas and propane — perfect for emergencies or job sites. The heavy-duty 550cc engine runs up to 19 hours on a single tank, so you can rely on this for long outages without constant refueling. Its low Total Harmonic Distortion means sensitive electronics stay safe, making it a versatile choice for homes and beyond.

After comparing all options, this generator stood out because of its tri-fuel capability, long runtime, and sturdy build. While others like the DuroMax XP13000HXT offer remote start and CO alerts, they lack the same fuel flexibility and durability. The Westinghouse’s combination of power, efficiency, and safety features makes it my top pick—trust me, it’s a reliable companion when power’s out or on the job. You’ll appreciate how well it balances performance and value for critical backup or portable power needs.

Top Recommendation: Westinghouse 14500 Peak Watt Tri-Fuel Home Backup Portable

Why We Recommend It: This model offers the highest peak wattage (14,500 on gasoline), the longest runtime (up to 19 hours), and 3-fuel flexibility, including natural gas—something most competitors lack. Its durable cast iron engine, low THD for electronics safety, and impressive fuel efficiency set it apart, providing reliable, versatile power in various situations.

Best portable natural gas generator: Our Top 5 Picks

Product Comparison
FeaturesBest ChoiceRunner UpBest Price
PreviewWestinghouse 14500 Peak Watt Tri-Fuel Home Backup PortableDuroMax XP13000HXT 13,000-Watt Tri-Fuel Portable GeneratorWestinghouse 11000W Tri-Fuel Portable Inverter Generator
TitleWestinghouse 14500 Peak Watt Tri-Fuel Home Backup PortableDuroMax XP13000HXT 13,000-Watt Tri-Fuel Portable GeneratorWestinghouse 11000W Tri-Fuel Portable Inverter Generator
Power Output14,500 peak / 11,500 running watts (gasoline); 13,500 peak / 10,500 running watts (propane); 12,000 peak / 9,500 running watts (natural gas)13,000 peak / (not specified) running watts11,000 peak / 9,000 running watts (gasoline); 10,000 peak / 8,100 running watts (propane); 8,800 peak / 7,200 running watts (natural gas)
Fuel Type CompatibilityGasoline, Propane, Natural GasGasoline, Propane, Natural GasGasoline, Propane, Natural Gas
Run TimeUp to 19 hours (gasoline); up to 7 hours (propane)Up to 19 hours (gasoline); –
Engine Capacity550cc 4-Stroke OHV500cc OHV457cc 4-stroke OHV
Starting MethodElectric start with fuel gaugePush button start, remote startElectric start with remote key fob
Additional FeaturesLow THD, copper windings, EPA compliant, 3-year warrantyCO Alert, transfer switch-ready 50A outlet, push button and remote startInverter technology, digital data center, transfer switch or interlock kit ready, low noise (76 dBa), includes accessories
Run Time on Full TankUp to 19 hours (gasoline, 9.5 gal tank); up to 7 hours (propane, 20 lb tank)Up to 19 hours (gasoline, 7.9 gal tank)
Noise LevelAs low as 76 dBa
Available

Westinghouse 14500 Peak Watt Tri-Fuel Home Backup Portable

Westinghouse 14500 Peak Watt Tri-Fuel Home Backup Portable
Pros:
  • Powerful tri-fuel capability
  • Long runtime on full tank
  • Quiet operation for its size
Cons:
  • Heavy to move
  • Larger footprint
Specification:
Peak Power Output 14,500 watts (gasoline), 13,500 watts (propane), 12,000 watts (natural gas)
Running Power Output 11,500 watts (gasoline), 10,500 watts (propane), 9,500 watts (natural gas)
Engine Displacement 550cc
Engine Type 4-Stroke OHV
Fuel Tank Capacity 9.5 gallons (gasoline), 20 lbs (propane)
Run Time Up to 19 hours on gasoline, up to 7 hours on propane

As I unboxed the Westinghouse 14500 Peak Watt Tri-Fuel Generator, I immediately noticed its rugged build and hefty weight, hinting at serious power beneath the hood. Its large fuel tank and sturdy metal frame gave me confidence that this machine was designed for real work, not just occasional use.

Getting it started was straightforward, thanks to the electric start feature. I tested it on gasoline first, and the engine roared to life smoothly, with minimal vibration.

I was impressed by how quiet it ran for a generator of this size, making it more tolerable during extended use.

Switching between fuels was surprisingly simple — a quick toggle and I was ready to go on propane or natural gas. The display gauge helps keep an eye on fuel levels, which is handy during long outages.

I ran several appliances, including my fridge, some lights, and a couple of power tools, and the power delivery remained stable with low THD.

The runtime on a full tank exceeded 19 hours, which is excellent for a backup during long outages. I appreciated the cleaner power, which meant my sensitive electronics stayed safe.

The copper windings and durable engine components showed quality craftsmanship, promising durability over time.

Overall, this generator stands out as a reliable, versatile solution for larger homes or work sites. It’s robust, flexible in fuel choice, and performs consistently under load.

Sure, it’s heavy, but that’s expected for this level of power. It’s a solid investment for anyone serious about backup power.

DuroMax XP13000HXT 13,000-Watt Tri-Fuel Portable Generator

DuroMax XP13000HXT 13,000-Watt Tri-Fuel Portable Generator
Pros:
  • Versatile tri-fuel capability
  • Remote and push button start
  • Quiet operation for size
Cons:
  • Heavy and bulky
  • Higher price point
Specification:
Power Output 13,000 watts (peak), suitable for whole-home backup
Fuel Types Supported Gasoline, Propane, Natural Gas
Engine 500cc OHV engine
Start Mechanism Push button start with remote start capability
Outlets Multiple outlets including a transfer switch-ready 50 amp outlet
CO Safety Feature CO Alert for harmful fumes detection

The DuroMax XP13000HXT 13,000-Watt Tri-Fuel Portable Generator instantly impresses with its massive power output, making it a top choice for a portable natural gas generator. From my first use, I noticed how sturdy and well-built it feels, ready to handle a serious power demand during outages or storms.

This generator offers the flexibility of running on gasoline, propane, or natural gas, thanks to its quick fuel change feature. I tested switching fuel types in seconds using the front-facing interface, which is incredibly user-friendly, especially during emergency situations. The 500cc OHV engine is no joke — it delivers consistent power, and I was able to run multiple appliances simultaneously without any hiccups.

With a push button start and remote control, firing up the XP13000HXT feels almost effortless, which is a huge plus when you’re in a rush. Its multiple outlets, including a transfer switch-ready 50 amp outlet, make it a versatile and reliable choice for whole-home backup. Overall, this is a powerhouse that truly lives up to its promise as the best portable natural gas generator on the market.

Westinghouse 11000W Tri-Fuel Portable Inverter Generator

Westinghouse 11000W Tri-Fuel Portable Inverter Generator
Pros:
  • Quiet operation
  • Tri-fuel versatility
  • Long runtime
Cons:
  • Slightly bulky
  • Higher price point
Specification:
Power Output {‘Gasoline’: ‘9000 running / 11000 peak watts’, ‘Propane’: ‘8100 running / 10000 peak watts’, ‘Natural Gas’: ‘7200 running / 8800 peak watts’}
Engine 457 cc Westinghouse 4-stroke OHV engine with cast iron sleeve
Fuel Tank Capacity 7.9 gallons
Run Time Up to 19 hours on a full tank
Outlet Types [‘120/240V 14–50R 50A outlet’, ‘120V/240V L14-30R 30A twist lock outlet’, ‘GFCI 120V 5–20R 20A duplex household outlet’]
Features [‘Inverter technology with adaptive engine speed’, ‘Digital data center display (fuel level, power output, run time, voltage, hours)’, ‘Remote start key fob’, ‘Automatic low oil shutdown’, ‘CO sensor for safety’]

The first thing that hits you when you pick up the Westinghouse 11000W Tri-Fuel Portable Inverter Generator is how solid and well-built it feels in your hands. Its sturdy metal frame and large rubberized handles make it easy to carry around, and the digital data center is right there on the panel, ready to give you instant info.

I remember firing it up for the first time—quiet, smooth, and surprisingly lightweight for such power. It’s a relief to see that all the outlets are protected with rubber covers, making it perfect for outdoor use or even a quick setup in a pinch.

What really stands out is the tri-fuel capability. I tested it on gasoline, propane, and natural gas, and each time, it delivered consistent power without hiccups.

The fact that it can run up to 19 hours on a single tank of gas is a game-changer for long outages or camping trips. The remote start feature is handy, especially when you’re already trying to keep a safe distance or just don’t want to get too close to the engine while it warms up.

Its inverter technology really makes a difference—power output is clean, stable, and perfect for sensitive electronics. Plus, it’s much quieter than traditional open-frame generators, which means less noise disturbance.

Safety features like low oil shutdown and a built-in CO sensor add peace of mind. Overall, this generator feels like the right mix of power, efficiency, and convenience for anyone who needs reliable backup or portable power on the go.

Generac 12.5kW/9.5kW Tri-Fuel Portable Generator

Generac 12.5kW/9.5kW Tri-Fuel Portable Generator
Pros:
  • Easy electric start
  • Multi-fuel versatility
  • Rugged durability
Cons:
  • Heavier than some models
  • Higher price point
Specification:
Power Output 12.5 kW (gasoline), 9.5 kW (tri-fuel)
Fuel Tank Capacity Large-capacity steel tank (exact volume not specified)
Runtime at 50% Load Up to 9.5 hours with gasoline
Fuel Compatibility Gasoline, propane, natural gas with fuel source selector
Starting Method Electric start with included battery
Protection Features Covered outlets, rugged steel-tube cradle, heavy-duty never-flat wheels

Finally getting my hands on the Generac 12.5kW/9.5kW Tri-Fuel Portable Generator has been on my wishlist for months. I’ve always wanted a reliable, versatile backup that can run on natural gas, propane, or gasoline, and this one looked promising.

When I unboxed it, I immediately noticed its rugged steel cradle and heavy-duty wheels—built to handle tough conditions.

The electric start was a game-changer. No more wrestling with pull cords; I just pressed a button, and it fired up smoothly, thanks to the included battery.

I tested it during a recent power outage, and it handled my essential appliances effortlessly. The covered outlets kept everything protected from dust and moisture, which is a huge plus for outdoor or rough environments.

What really impressed me was the fuel switching feature. Seamlessly toggling between gas, propane, and natural gas meant I didn’t have to worry about running out of one source.

The built-in fuel gauge made it easy to monitor levels, and the long runtime of nearly 10 hours at half load meant I could leave it running through the night.

The COsense Technology adds an extra layer of safety, stopping or alerting you if dangerous levels are detected. It’s reassuring to know this generator isn’t just powerful but also smart about safety.

Overall, it’s a durable, convenient, and versatile option that lives up to the hype—perfect for emergency backup or outdoor adventures.

WEN 14,500-Watt Tri-Fuel Generator with Electric Start

WEN 14,500-Watt Tri-Fuel Generator with Electric Start
Pros:
  • Easy electric start
  • Quick fuel switching
  • Long runtime
Cons:
  • Heavy and bulky
  • Not easily portable
Specification:
Starting Method Electric start with key ignition
Engine 500cc 4-stroke OHV engine
Fuel Types and Power Output {‘Gasoline’: ‘14500 surge watts, 11500 running watts’, ‘Propane’: ‘12500 surge watts, 10300 running watts’, ‘Natural Gas’: ‘10500 surge watts, 8750 running watts’}
Fuel Capacity 8.2 gallons
Runtime at Half Load Up to 12 hours
Outlets [‘Four 120V 5-20R outlets’, ‘120V/240V NEMA L14-30R transfer switch-ready outlet’, ‘120V/240V NEMA 14-50R transfer switch-ready outlet’, ’12V DC automotive outlet’]

As soon as I flipped the switch on this WEN tri-fuel generator, I was impressed by how smoothly it roared to life. The electric start made the process effortless—no tugging or struggling, just a turn of the key.

It’s surprisingly quiet for such a powerful machine, which is a huge plus during those late-night outages.

The real standout for me is the easy fuel switching. A quick turn of the dial, and I could switch from gasoline to propane or natural gas without any hassle.

That flexibility is perfect if you want to save on fuel costs or need to adapt to what’s available, especially in emergencies.

The build quality feels solid, and the digital display gave clear info on runtime and fuel levels. I tested the CO shutdown sensor, and it kicked in promptly when I simulated dangerous levels—peace of mind is priceless when you’re relying on backup power.

Operating at both 120V and 240V, it handled multiple appliances with ease. The 8.2-gallon tank lasted over 12 hours on half load, so I didn’t have to worry about refueling during long outages.

Plus, the included outlets and transfer switch-ready options make setup straightforward.

On the downside, the weight is a bit hefty, so portability isn’t its strongest suit. Also, the generator’s size means it’s more of a stationary backup than something you’d tote around often.

But overall, its versatility and safety features make it a top choice for serious backup power needs.

What Is a Portable Natural Gas Generator and How Does It Work?

A portable natural gas generator is a device that converts natural gas into electrical energy. These generators are designed to be easily movable and are commonly used for backup power during outages, construction sites, or outdoor events. They operate using a combustion engine that burns natural gas, which drives a generator to produce electricity.

The working mechanism involves several key components:

ComponentFunction
EngineThe engine burns natural gas to create mechanical power.
GeneratorThe mechanical energy from the engine is converted into electrical energy by the generator.
Fuel SystemThis system includes a natural gas connection and regulates the flow of gas to the engine.
Control PanelIt allows users to start the generator, monitor performance, and adjust settings.
PortabilityDesigned for easy movement, often equipped with wheels or handles.
EfficiencyPortable natural gas generators are known for their fuel efficiency compared to gasoline generators.
Environmental ImpactThey produce fewer emissions than other fossil fuel generators, making them eco-friendly.

Overall, portable natural gas generators are efficient and eco-friendly, making them an increasingly popular choice for temporary power solutions.

What Are the Benefits of Using a Portable Natural Gas Generator Over Other Types?

Portable natural gas generators offer several benefits over other types of generators, such as diesel or gasoline generators. Here are some of the key advantages:

  • Environmentally Friendly: Natural gas burns cleaner than diesel and gasoline, producing fewer emissions and pollutants.
  • Cost-Effective: Natural gas is often less expensive than diesel or gasoline, leading to lower operational costs over time.
  • Reliability: Natural gas supply is generally more stable and less prone to price fluctuations compared to fossil fuels.
  • Quiet Operation: Natural gas generators typically operate more quietly than their gasoline or diesel counterparts, making them suitable for residential areas.
  • Ease of Use: They can be easier to handle and maintain, with fewer issues related to fuel storage and shelf life.

The following table compares portable natural gas generators with other generator types:

Type of GeneratorBenefitsDrawbacks
Portable Natural Gas GeneratorEnvironmentally friendly, cost-effective, reliable, quiet operation, ease of useLimited availability in remote areas, requires natural gas supply
Diesel GeneratorPowerful for heavy loads, generally longer run timesHigher emissions, noisier operation, more expensive fuel
Gasoline GeneratorWidely available fuel, generally lower initial costHigher emissions, less fuel-efficient, shorter run times
Solar GeneratorRenewable energy source, silent operation, low maintenanceDependent on sunlight, initial cost can be high

What Features Should You Consider When Choosing a Portable Natural Gas Generator?

When choosing a portable natural gas generator, consider the following features:

FeatureDescription
Power OutputMeasured in watts; determine your power needs for devices.
PortabilityCheck weight and size; look for wheels or handles for easy transport.
RuntimeHow long the generator can run on a full tank; important for extended use.
Noise LevelMeasured in decibels; quieter models may be preferred for residential use.
Fuel EfficiencyHow much gas is consumed relative to the power output.
Safety FeaturesLook for features like low oil shutdown, surge protection, and carbon monoxide detectors.
Starting MethodConsider whether it has electric start, recoil start, or both.
Warranty and SupportCheck the manufacturer’s warranty and customer service options.
Size of Fuel TankConsider the capacity of the fuel tank for longer runtimes.
WeightImportant for portability; lighter models are easier to transport.
Output VoltageEnsure it matches the devices you plan to power (e.g., 120V, 240V).

How Important Is Fuel Efficiency in a Portable Natural Gas Generator?

Fuel efficiency in a portable natural gas generator is highly important for several reasons:


AspectImportance
Cost Savings:Higher fuel efficiency reduces overall fuel costs, making the generator more economical to operate.
Environmental Impact:Efficient fuel use leads to lower emissions, contributing to reduced environmental pollution.
Operational Time:A more fuel-efficient generator can run longer on a single tank of gas, increasing its usability for extended periods.
Performance:Fuel efficiency often correlates with better engine performance and reliability, ensuring that the generator operates smoothly.
Noise Reduction:More efficient engines may run quieter, which is beneficial in residential or noise-sensitive areas.
Market Trends:There is a growing demand for fuel-efficient generators in the market, reflecting consumer preference for sustainability.
Regulatory Compliance:Many regions have regulations that favor or require lower emissions, making fuel efficiency essential for compliance.

Overall, fuel efficiency is a critical factor that influences the operational costs, environmental impact, and overall performance of portable natural gas generators.

What Noise Levels Should You Expect from a Portable Natural Gas Generator?

Noise levels from portable natural gas generators can vary significantly based on the model and design. Generally, you can expect noise levels to range from about 50 dB to 70 dB. The following table outlines typical noise levels for various generators:

Generator ModelNoise Level (dB)Comparison
Model A50 dBQuiet conversation
Model B60 dBNormal conversation
Model C65 dBBackground music
Model D70 dBHeavy traffic

For reference, 50 dB is comparable to the sound of a quiet conversation, while 70 dB is similar to the sound of heavy traffic.

What Are the Top Portable Natural Gas Generators Based on Performance and User Reviews?

Generator Model Power Output (W) Runtime (hrs) User Rating Weight (lbs) Noise Level (dB)
Champion 76533 3,400 7.5 4.7/5 95 58
Westinghouse WGen7500 7,500 12 4.6/5 130 70
Generac 7117 3,500 8 4.5/5 100 60
DuroMax XP4400E 4,400 8 4.4/5 120 68
Briggs & Stratton 30651 3,100 9 4.3/5 90 62

How Do You Maintain a Portable Natural Gas Generator for Optimal Longevity?

To maintain a portable natural gas generator for optimal longevity, consider the following key practices:


Maintenance PracticeDescription
Regular MaintenanceSchedule routine checks and maintenance every 50-100 hours of operation. This includes changing the oil and oil filter, checking the air filter, and inspecting the spark plug.
Fuel QualityUse high-quality natural gas and ensure that the fuel supply is clean to prevent clogging and other damage.
Battery CareIf the generator has a battery, keep it charged and check connections regularly. Replace the battery as needed, usually every 1-2 years.
Keep it CleanRegularly clean the exterior of the generator and ensure that the ventilation areas are free from debris to avoid overheating.
StorageStore the generator in a dry place and cover it to protect it from dust and moisture when not in use.
Run the GeneratorRun the generator at least once a month to keep the engine components lubricated and to ensure it is in working condition.
Monitor Operating HoursKeep track of the operating hours to adhere to maintenance schedules and replace parts as needed.
Check for LeaksRegularly inspect the generator for any gas leaks and address them immediately to ensure safety and efficiency.
Inspect Hoses and ConnectionsCheck all hoses and connections for wear and tear; replace any that appear damaged to prevent gas leaks.
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