20 Best Diesel Generators [2024]

Are you looking for the best diesel generators? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling diesel generators.

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# Preview Product
1 Generac 6864, 5000 Running Watts/5500 Starting Watts, Diesel Powered Portable Generator Generac 6864, 5000 Running Watts/5500 Starting Watts, Diesel Powered Portable Generator
2 WEN DF1100T 11,000-Watt 120V/240V Dual Fuel Portable Generator with Wheel Kit and Electric Start -... WEN DF1100T 11,000-Watt 120V/240V Dual Fuel Portable Generator with Wheel Kit and Electric Start...
3 DuroMax XP13000EH Dual Fuel Portable Generator 13000 Watt Gas or Propane Powered Electric Start-Home... DuroMax XP13000EH Dual Fuel Portable Generator 13000 Watt Gas or Propane Powered Electric...
4 Generac Guardian 24kW Home Standby Generator with PWRview Transfer Switch Wi-Fi Enabled Generac Guardian 24kW Home Standby Generator with PWRview Transfer Switch Wi-Fi Enabled
5 Cummins Onan P4500I Inverter Portable Generator Cummins Onan P4500I Inverter Portable Generator
6 Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start, Transfer... Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start, Transfer...
7 Generac 7127 IQ3500 3,500-Watt Gas-Powered Portable Generator, 50-State/CARB Compliant Generac 7127 IQ3500 3,500-Watt Gas-Powered Portable Generator, 50-State/CARB Compliant
8 Champion Power Equipment 100111 15,000/12,000-Watt Portable Generator with Electric Start and Lift... Champion Power Equipment 100111 15,000/12,000-Watt Portable Generator with Electric Start and...
9 Generac Guardian 24kW Automatic Home Standby Generator Wi-Fi Enabled Generac Guardian 24kW Automatic Home Standby Generator Wi-Fi Enabled
10 Pulsar PG15KVTWB 15,000W Dual Fuel Portable Generator Pulsar PG15KVTWB 15,000W Dual Fuel Portable Generator
11 DuroStar DS13000EH Dual Fuel Portable Generator - 13000 Watt Gas or Propane Powered - Electric Start... DuroStar DS13000EH Dual Fuel Portable Generator - 13000 Watt Gas or Propane Powered - Electric...
12 GENMAX Portable Inverter Generator, 9000W Super Quiet Gas Powered Engine with Parallel Capability,... GENMAX Portable Inverter Generator, 9000W Super Quiet Gas Powered Engine with Parallel...
13 Briggs & Stratton Q6500 Quiet Power Series Inverter Generator | CO Guard, 6500 starting watts Briggs & Stratton Q6500 Quiet Power Series Inverter Generator | CO Guard, 6500 starting watts
14 WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator, CARB Compliant, Black/orange WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator, CARB Compliant, Black/orange
15 Champion Power Equipment 200986 4500-Watt Portable Inverter Generator, RV Ready Champion Power Equipment 200986 4500-Watt Portable Inverter Generator, RV Ready
16 DuroMax XP13000HXT 13,000-Watt 500cc Tri Fuel Gas Propane Natural Gas Portable Generator with CO... DuroMax XP13000HXT 13,000-Watt 500cc Tri Fuel Gas Propane Natural Gas Portable Generator with CO...
17 Westinghouse 6600 Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start with Auto... Westinghouse 6600 Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start with Auto...
18 All Power America G12000EGL 12000 Watt Heavy Duty Dual Fuel Portable Generator with Electric Start... All Power America G12000EGL 12000 Watt Heavy Duty Dual Fuel Portable Generator with Electric...
19 Generac G0071720 10 kW Guardian Home Standby Generator, bisque Generac G0071720 10 kW Guardian Home Standby Generator, bisque
20 Generac 7043 Home Standby Generator 22kW/19.5kW Air Cooled with Whole House 200 Amp Transfer Switch,... Generac 7043 Home Standby Generator 22kW/19.5kW Air Cooled with Whole House 200 Amp Transfer...
Bestseller No. 1
Generac 6864, 5000 Running Watts/5500 Starting Watts, Diesel Powered Portable Generator
  • Durable, fully welded 1 1/4" steel frame
  • Yanmar LW Series 435cc air-cooled direct injection, industrial-grade diesel engine
  • Diesel power requires less maintenance, is more efficient, and provides a long life
  • True Power Technology provides less than 5% total harmonic distortion for clean, smooth operation of sensitive electronics, tools and appliances
  • True Power Technology provides less than 5% total harmonic distortion for clean, smooth operation of sensitive electronics, tools and appliances
Bestseller No. 2
WEN DF1100T 11,000-Watt 120V/240V Dual Fuel Portable Generator with Wheel Kit and Electric Start -...
  • Switch between gasoline (11,000 surge watts, 8,300 running watt) and propane (9,500 surge, 7,500 running) with the simple turn of the selection dial
  • Voltage easily goes from 120V to 240V, perfect for transfer switches and emergency backup
  • Electric start powers the 457cc 4-stroke OHV engine with the turn of a key
  • 6.6-gallon tank provides up to 8.5 hours of half load run time
  • Includes four 120V GFCI outlets (5-20R), a 120V 30A twist lock outlet (L5-30R), a 120V/240V 50A outlet (NEMA 14-50R), a 12V DC cigarette-lighter-style...
SaleBestseller No. 3
DuroMax XP13000EH Dual Fuel Portable Generator 13000 Watt Gas or Propane Powered Electric Start-Home...
  • POWERFUL DUROMAX ENGINE: The XP13000EH is powered by a 500cc OHV Duromax Engine. Engine Speed-3600 RPM. Wheel Diameter-10-Inches
  • DUAL FUEL TECHNOLOGY: The ability to run on Propane or Gasoline allows the Freedom and Flexibility of Fuel Choice.
  • PLENTY OF POWER: With 13,000 starting watts and 10,500 watts, this unit can handle heavy loads from lights, refrigerators, home conditioners and high...
  • MAXIMUM POWER: The power panel includes a wide selection of outlets for maximum compatibility in your applications including: 1 120/240V 50A heavy...
  • POWERING EVERYONE ANYWHERE: Like all DuroMax generators, the XP13000EH is EPA and CARB approved for use in all 50 states.
Bestseller No. 4
Generac Guardian 24kW Home Standby Generator with PWRview Transfer Switch Wi-Fi Enabled
  • Save up to 8,000 dollars in product and installation costs (when compared to competitive output products)
  • Takes up 70% less space (when compared to competitive output products)
  • PWRview, Generac's home energy management system, allows generator owners to monitor and manage home energy usage, leading to a reduction in electric...
  • Using PWRview you could save enough to pay for your generator
Bestseller No. 5
Cummins Onan P4500I Inverter Portable Generator
  • Dependable 7.3 HP 224cc OHV 4-Stroke engine
  • Parallel capable with another P4500 inverter generator to reach 50A of power
  • Two 5V USB ports for charging sensitive electronics such as phones or tablets
  • RV and camper ready with 30A TT-30R outlet
  • Push button and remote start with pull cord backup
SaleBestseller No. 6
Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start, Transfer...
  • 9500 Running Watts and 12500 Peak Watts (Gasoline); 8500 Running Watts, 11200 Peak Watts (Propane); Remote Start With Included Key Fob, Electric and...
  • Features Two GFCI 120V 5–20R Standard Household Receptacle, One Transfer Switch Ready 120V L14-30R, and One RV Ready 120/240V 14–50R; All Outlets...
  • Powered by a Heavy Duty 457cc Westinghouse 4-Stroke OHV Engine Featuring a Long-Lasting Cast Iron Sleeve With Automatic Low Oil Shutdown and Digital...
  • Plug-and-Play: Comes With a Remote Start Key Fob, 12V Battery Charger, Oil, an Oil Funnel, a Tool Kit, and a User’s Manual to Get You Started Right...
  • All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contain Minimum Residual Oil and/or Fuel Odor; EPA and CARB...
SaleBestseller No. 7
Generac 7127 IQ3500 3,500-Watt Gas-Powered Portable Generator, 50-State/CARB Compliant
  • ULTRA-QUIET – 40% Quieter than Honda* Advanced inverter technology and enclosure design provide optimal quiet performance (* Over 5 dB(A) quieter...
  • Ideal for work or play - durable steel enclosure, clean inverter power and easy portability make this the ideal generator for jobsites or recreational...
  • 16% more power than Honda, Featuring power rush advanced technology.Rated AC Frequency:60 Hz
  • Digital smart lcd - digital wattage meter, run time remaining display, generator status, hour meter and fuel level
  • USB ports - charge mobile devices including smartphones and tablets
Bestseller No. 8
Champion Power Equipment 100111 15,000/12,000-Watt Portable Generator with Electric Start and Lift...
  • Ultra-Powerful – At 15,000 starting watts and 12,000 running watts, enjoy up to 9 hours of run time on a full tank of gasoline with a noise level of...
  • Electric Start – Trust the reliable 717cc V-Twin Champion engine with its battery-included electric start featuring a reliable toggle switch, plus...
  • Covered Outlets – One 120V 30A locking, a 120/240V 30A locking, a 120/240V 50A and four 120V 20A GFCI outlets, plus Volt Guard built-in surge...
  • Lift Hook – Designed for safe and easy transport, loading and unloading, plus the Intelligauge keeps track of voltage, hertz and run-time hours so...
  • Champion Support – includes 3-year limited warranty with FREE lifetime technical support from dedicated experts
Bestseller No. 9
Generac Guardian 24kW Automatic Home Standby Generator Wi-Fi Enabled
  • Save up to 8,000 dollars in product and installation costs* (*when compared to competitive output products)
  • Takes up 70% less space* (when compared to competitive output products)
  • 5-Year limited warranty for automatic standby generators
  • True power technology delivers best-in-class power quality with less than 5 percent total harmonic distortion for clean, smooth operation of sensitive...
Bestseller No. 10
Pulsar PG15KVTWB 15,000W Dual Fuel Portable Generator
  • 15, 000 Peak Watts/12, 000 Running Watts (Gasoline)
  • 13, 500 Peak Watts/11, 000 Running Watts (Propane)
  • Dual Fuel Capability
  • 713cc, V-Twin, 4-Stroke, OHV, Air Cooled Engine
  • Heavy-Duty Powder Coated Frame with Lifting Bar, Never-flat wheels and Folding Handles
SaleBestseller No. 11
DuroStar DS13000EH Dual Fuel Portable Generator - 13000 Watt Gas or Propane Powered - Electric Start...
  • plenty of power – with 13,000 starting watts and 10,500 running watts, this unit can handle heavy loads, from lights and a refrigerator to a home...
  • dual fuel technology – this generator runs on gasoline or propane, giving you the freedom and flexibility of fuel choice
  • powerful engine – the durostar 500cc ohv engine is a workhorse that provides plenty of power to handle multiple jobs, from powering high voltage...
  • idle control – lowers the rpms of the generator when not in use, saving fuel and reducing noise. ideal on job sites where power is used...
  • fully featured power panel – the power panel includes a wide selection of outlets for maximum compatibility in your applications including: 2 120v...
Bestseller No. 12
GENMAX Portable Inverter Generator, 9000W Super Quiet Gas Powered Engine with Parallel Capability,...
  • 【Strong Power】458cc 4-stroke OHV engine produces 9000 peak watts and 7600 rated watts with only 62 dBA Noise level at 23 feet distance quarter...
  • 【Easy To Carry And Use】 Strong steel handle and 2 rolling wheels for easy travel; The Digital Control Center features an LCD display showing hours...
  • 【Parallel function】Voltage Transfer switch allows you parallel both 120V or 240V. Just using parallel cord to connect two GM9000iE inverter...
  • 【Powerful Control Panel】The control panel includes a wide selection of outlets for maximum compatibility in your applications including: 4 120V...
  • 【CO DETECT】Automatically turns off the generator when an unsafe level of carbon monoxide is detected.
SaleBestseller No. 13
Briggs & Stratton Q6500 Quiet Power Series Inverter Generator | CO Guard, 6500 starting watts
  • QuietPower Series Inverter Technology - Inverter technology produces power that’s more than 60% quieter than standard generators while delivering...
  • 306cc Integrated Engine/Alternator - A highly-efficient integrated engine/alternator provides up to 14 hours of run time.
  • Protective, Noise-Reducing Shell - With an all-steel frame enclosed in a protective shell, noise is minimized and internal components are protected.
  • Compact, Lightweight Design - With a design that’s 45% more compact and 30% lighter than standard generators, moving and storing your generator is...
  • CO Guard carbon monoxide shutdown technology - Shuts down the generator when harmful levels of carbon monoxide are detected
Bestseller No. 14
WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator, CARB Compliant, Black/orange
  • Dimensions: 19.8" L x 13.8" W x 18.9" H | Weight: 66.1 lb
  • Generate clean power to safely operate sensitive electronics such as phones, tablets, televisions and computers
  • Parallel-ready panel allows you to connect any two WEN inverter generators for increased wattage output
  • 212cc 4-stroke CARB-compliant OHV engine produces 4000 surge watts and 3500 rated watts
  • Includes two 120V NEMA 5-20R receptacles, two 5V USB ports, one 120V RV-ready TT-30R receptacle
SaleBestseller No. 15
Champion Power Equipment 200986 4500-Watt Portable Inverter Generator, RV Ready
  • QUIET TECHNOLOGY: 61 dBA is great for RVs, tailgating, or camping with 4500 starting watts and 3500 running watts and up to 14 hours run time on only...
  • PARALLEL READY: The optional parallel kit (sold separately) enables this inverter to connect with another 2800-watt or higher Champion inverter to...
  • INTELLIGAUGE: Monitor voltage, frequency and operating hours with ease, plus the EZ Start Dial simplifies startup while Economy Mode monitors power...
  • CLEAN POWER: RV Ready with a 120V 30A RV, plus two 120V 20A household outlets with clean power (less than 3% THD) and a 12V automotive-style outlet,...
  • CHAMPION SUPPORT: Includes 3-year limited warranty with FREE lifetime technical support from dedicated experts
SaleBestseller No. 16
DuroMax XP13000HXT 13,000-Watt 500cc Tri Fuel Gas Propane Natural Gas Portable Generator with CO...
  • Tri Fuel Technology: This generator runs on gasoline, propane, and natural gas, giving you the freedom and flexibility of fuel choice. Gasoline is a...
  • Home Power Backup Ready: With 13,000 watts of POWER, the XP13000HXT will power your lights, appliances, AC system and other household essentials with...
  • Powerful 500cc OHV Engine: At the heart of this generator resides a robust DuroMax engine designed to provide you with the most power.
  • CO Alert: Protect your family from dangerous engine fumes. DuroMax offers the safest generators on the market with our CO Alert technology, which...
  • Push Button Start and Remote Start: Turn on your generator with a simple push of a button, or use the remote to conveniently start your generator from...
SaleBestseller No. 17
Westinghouse 6600 Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start with Auto...
  • Gasoline: 6600 Peak Watts and 5300 Running Watts; Propane: 5900 Peak Watts and 4800 Running Watts; Push-Button Electric Start with Remote Key Fob; 4.7...
  • Features One 5–20R 120V Household Duplex Receptacle, One RV-Ready TT-30R 30 Amp Receptacle, and One Transfer Switch Ready L14-30R 30 Amp Receptacle;...
  • Plug-and-Play: Comes With Oil, an Oil Funnel, Propane Hose, Tool Kit, and a User’s Manual to Get You Started Right Out of the Box (Minimal Assembly...
  • Powered by a 274 CC Westinghouse 4-Stroke OHV Engine Featuring a Long-Lasting Cast Iron Sleeve With Automatic Low Oil Shutdown
  • All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contain Minimum Residual Oil and/or Fuel Odor; EPA and CARB...
Bestseller No. 18
All Power America G12000EGL 12000 Watt Heavy Duty Dual Fuel Portable Generator with Electric Start...
  • 12000 watt peak power, 9000 watt rated power(GAS); 9000 watt peak power, 7250 watt rated power(LPG)
  • 18 HP 459cc OHV air cooled engine; Running time: 10 hrs @ 1/2 load; Operating Noise 76 dB
  • Electric & Recoil Start; 8 Gallon Fuel Capacity; Low Oil Level Shut Down
  • 2x AC Duplex 120V Outlet, 1x 120V/240V Twist-Lock Outlet, 1x 120V Twist-Lock Outlet, 1x 120/240V 50A Outlet. Flat Free Wheel Kit inluded
  • EPA Certified. Non C. A. R. B. Compliant, not available to ship to California
Bestseller No. 19
Generac G0071720 10 kW Guardian Home Standby Generator, bisque
  • Powers 16-circuits of your home with the 100-amp, NEMA 3R (indoor or outdoor rated) transfer switch with aluminum enclosure
  • True Power Technology delivers best-in-class power quality with less than 5 percent total harmonic distortion for clean, smooth operation of sensitive...
  • Generac's G-Force Engine is a purpose-built, pressure-lubricated engine capable of handling the rigors of generator use, resulting in power that’s...
  • Mobile Link Wi-Fi allows users to monitor the status of the generator from anywhere in the world using a smartphone, tablet, or PC
  • 5 year limited warranty
Bestseller No. 20
Generac 7043 Home Standby Generator 22kW/19.5kW Air Cooled with Whole House 200 Amp Transfer Switch,...
  • True power technology delivers best-in class power quality (less than 5% thd) for Smooth operation of sensitive electronics and appliances
  • Includes a 200 amp NEMA 3 (indoor/ outdoor rated) whole house Smart transfer switch
  • Generac evolution controller features LED indicators for generator status, utility power presence or maintenance required
  • Tough, durable all-weather aluminum enclosure offers 3 removable sides for easy access for installation, service and maintenance
  • Battery not included. Generac Battery 7043 5819 Sold Separately.

Having trouble finding a great diesel generators?

This problem is well understood by us because we have gone through the entire diesel generators research process ourselves, which is why we have put together a comprehensive list of the best diesel generatorss available in the market today.

After hours of searching and using all the models on the market, we have found the best diesel generators for 2023. See our ranking below!

How Do You Buy The Best Diesel Generators?

Do you get stressed out thinking about shopping for a great diesel generators? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching diesel generators, which is why we have assembled a comprehensive list of the greatest diesel generators available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for diesel generators that you consider buying. Your questions might include the following:

  • Is it worth buying an diesel generators?
  • What benefits are there with buying an diesel generators?
  • What factors deserve consideration when shopping for an effective diesel generators?
  • Why is it crucial to invest in any diesel generators, much less the best one?
  • Which diesel generators are good in the current market?
  • Where can you find information like this about diesel generators?

We’re convinced that you likely have far more questions than just these regarding diesel generators, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for diesel generators, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible diesel generators. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an diesel generators buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available diesel generators currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of diesel generators has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an diesel generators?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your diesel generators.
  5. Customer Ratings: Number ratings grade diesel generators objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their diesel generators.
  7. Product Quality: You don’t always get what you pay for with an diesel generators, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an diesel generators is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining diesel generators information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding diesel generators is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

FAQ:

Q: How to choose a good diesel generator?

A: – Running Wattage (R) = 350 watts – Starting Wattage (S) = 350 x 3 = 1,050 watts – Total Wattage (R + S) = 350 + 1,050 = 1400 watts

Q: What is the best home diesel generator?

A: Portability and Design. The Generac is as solid as it can get,thanks to the solid steel frame construction,which is built to last. Performance and Power. Under the hood of the Generac,we have a Yanmar LW Series 435cc air-cooled,utilizing direct fuel injection. Fuel Efficiency. … True Power Technology. … Ease of Use. …

Q: What to consider when buying a diesel generator?

A: Size really matters. The most important thing to consider when sizing a generator is the high inrush currents associated with starting electric motors and transformers,which are typically six times … Modular capability. … Control systems and power management. … Fuel efficiency and autonomy. … Physical size and transportation. … Conclusion. …

Q: What is the best generator to buy?

A: Portable. One of the most popular types of generators,portable generators are relatively compact units typically mounted on wheels for easy positioning and mobility. Inverter. For an alternative to stationary home generators and noisy portable generators,consider an inverter generator. Home Standby. …

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