10 Best Diesel Generator of December 2025

• 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

Generac

• Quiet, portable inverter generator delivers 6,500 starting watts of reliable home backup power
• Quiet power series inverter technology and a noise-reducing shell give you power that’s more than 60 % quieter than a standard generator (66 dBA at 25% load)
• Design is 45% more compact & 30% lighter (128 pounds) than a standard portable generator. Start type: Recoil
• Highly-efficient 306cc Briggs & Stratton integrated engine/alternator provides upto 14 hours of run time at 25% load
• Power a wide variety of electronics & devices at the same time with (4) 120V-20A outlets, (2) USB outlets & (1) 120V-240V locking outlet. Use of RV adapter in the twist lock outlet provides 2500W of continuous power (120V / 20.8A)
• Cannot be shipped to the state of California
• Engine type: 4-Stroke

Briggs & Stratton

• 5-Year limited Warranty for automatic standby generators.
• Up to whole house protection with the 200 Amp, NEMA 3R (aluminum outdoor enclosure) smart switch
• Smart, User-friendly controls. Generac’s evolution controller features a multilingual LCD display that allows you to Monitor Battery status and track maintenance intervals to ensure your generator is always in top operating condition.

Generac

• Digital readout helps manage oil changes and maintenance schedule
• Features electric start, low-oil shutdown, an automatic voltage regulator and overload protection to maximize safety
• CARB and EPA III meet requirements for sale in all 50 states
• Includes wheel kit and foldable handles for easy transport
• 223cc engine provides 4,750 surge watt and 3,750 rated watt

WEN

• PowerRUSH Technology - Delivers over 50% more starting capacity-allowing you to do more with less
• Quiet inverter power - reduces sound emissions and provides optimal performance
• Easy to carry - compact & lightweight with built-in handle
• Truepower - clean power for sensitive electronics. ItemWeight: 59.5 pounds
• USB outlets and parallel ready - connect 2 units together for double the power

Generac

• POWERFUL DUROSTAR ENGINE: The DS10000EH is powered by a DuroStar 18 HP 440cc OHV engine with automatic low oil shutoff; Fuel Capacity: 8.3 Gallons; Noise Level: 72dB
• PLENTY OF POWER: With 10,000 peak watts and 8,000 running watts, this unit is a workhorse that provides plenty of power to handle multiple jobs from powering high voltage appliances to heavy duty power tools
• MAXIMUM POWER: With DuroStar MX2 technology, get the maximum power from each of the 120V outlets; Choose between operating the generator at both 120V and 240V simultaneously, or at 120V only with full power
• POWERING EVERYONE ANYWHERE: Like all DuroStar generators, the DS10000EH is EPA and CARB approved for use in all 50 states
• DUAL FUEL TECHNOLOGY: This generator runs on gasoline or propane giving you the freedom and flexibility of fuel choice
• WHAT'S IN THE BOX: DuroStar DS10000EH Generator, Oil Funnel, Sparkplug Wrench, Tool Set, Wheel & Handle Kit, DC Charging Cables and Owner's Manual
• POWER PANEL: Includes a selection of outlets for maximum compatibility in your applications including: 2 120V household outlets, 1 120V 30A twist lock outlet, 1 120/240V 30A twist lock outlet and 1 120/240V 50A heavy duty outlet; Also includes a voltmeter and 12V DC charging posts for charging external batteries

DuroStar

• Dual Fuel: Operate your 3800-watt portable generator right out of the box on either gasoline or propane, plus the unit holds 0.6-quarts of oil (included) and has a low oil shut-off sensor
• Electric Start: Power up the 224cc Champion engine with the handy toggle switch, battery included
• Intelligauge: Keep track of voltage, hertz and run-time hours to easily monitor power output and track maintenance intervals
• Outlets: One 120V 30A RV outlet (TT-30R), one 120V 30A locking outlet (L5-30R) and two 120V 20A household outlets (5-20R) - trust Volt Guard built-in surge protector to prevent overloads
• Champion Support: Includes 3-year limited warranty with FREE lifetime technical support from dedicated experts

Champion Power Equipment

• Dimensions: 18" x 11" x 18" | Weight: 50 lbs
• Noise Level: 53 dB operation
• EPA III and CARB Compliant 79.7 cc 4-stroke OHV engine produces 2000 surge watts and 1600 rated watts
• Great for campgrounds, construction sites, tailgates and power outages
• Produces clean power to safely operate and prevent damage to sensitive electronics such as phones, tablets, televisions and computers
• Includes two three-prong 120V receptacles, one 12V DC receptacle and one 5V USB port

WEN

• Features Two GFCI (Ground Fault Circuit Interrupter) 5-20R 120V Household Duplex Receptacle and One L14-30R 120/240V Twist-Lock Receptacle; All Outlets Have Rubber Covers for Added Safety
• 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 Out of the Box (Minimal Assembly Required)
• Powered by a 420cc Westinghouse 4-Stroke OHV Engine Featuring a Long-Lasting Cast Iron Sleeve with Automatic Low Oil Shutdown and Digital Hour Meter. Noise Level-72 dBA
• All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contain Minimum Residual Oil and/or Fuel Odor; EPA and CARB Compliant; Backed by 3-Year Limited Service, Labor, and Parts Coverage with Nationwide Customer Service Network
• 7500 Running Watts and 9500 Peak Watts; Remote Start With Included Key Fob, Electric and Recoil Start; Up to 11 Hours of Run Time on a 6.6 Gallon Fuel Tank With Fuel Gauge

Westinghouse

• Your purchase includes One DuroMax XP4400EH 4400 watt Dual Fuel Hybrid generator with Electric Start, One oil funnel, One spark plug wrench, tools set, wheels and handle kit, DC charging cables and owner’s manual
• Portable Generator dimensions: 24” L x 17" W x 17" H. Product weight: 127 lbs
• Specifications: Noise level – 69 dB. Fuel tank capacity (GASOLINE) – 3.96 gallons. Suggested tank size (PROPANE) – 20 gallons
• The ability to run on Propane or Gasoline allows the Freedom and Flexibility of Fuel Choice
• With 4,400 starting watts and 3,500 running watts, this unit can handle heavy loads from lights and a refrigerator to a home air conditioner and high amperage power tools. Operate at both 120 V and 240 V simultaneously, or at 120 only with full power

DuroMax