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Best small diesel generators - May 2026

Last Updated - May 29, 2026

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Energypac Systems

15kW Diesel Generator Enclosed with Fuel Tank

Energypac Systems

$11,299.00

More Details
Main highlights
- Auto/Manual Start Control Panel with Key Switch Safety Shutdown System (Low Engine Oil/High Temp) 12 Volt Electrics Vibration Isolators Industrial Air Cleaner Residential Muffler Engine Support Legs Oil & Fuel Filters 14 Gallon Sub-Base Fuel Tank with Level Gauge Center Point Lifting Eye, Super-Silent Level 2 Sound Attenuated Powder Coated Enclosure with Lockable Doors Circuit Breaker (2) Duplex 120 Volt Receptacles (2) 50Amp Nema 14-50R Receptacles Main Full Power Receptacle
$11,299.00
2

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Energypac Systems

6KW Diesel Generator

Energypac Systems

$5,397.00

More Details
Main highlights
- - Electric Start - Yanmar Heavy Duty L100 9.3HP Industrial 3600 RPM Air Cooled Electric Start Diesel Engine - Recoil Backup - Industrial Generator End - Automatic Voltage Regulator - 3.5 Gallon Fuel Tank (8 Hr Run Time) - Roll bar skid - 12 Volt Starter - Alternator - Control Panel (Key Switch & Low Oil Shutdown) - Receptacle Panel with 120V Duplex - 120V 30A twist lock - 240V 20A Twist lock plug - 12VDC Receptacle (8.3A Battery Charging) - Engine Oil - Fuel & Oil Filters - Battery Included Shop Tested.
$5,397.00
3

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Generac

Generac 6864 XD5000E 5000-Watt Diesel-Powered Portable Generator - Ideal for Emergency Backup Power and Job Sites - Reliable Power for Demanding Applications - CARB Compliant

Generac

$4,249.00

More Details
Main highlights
- Robust and Portable: The generator features a sturdy steel frame with an integrated lifting eye, making it easy to transport and secure on the jobsite. It's a reliable power source for both remote locations and professional use
- Industrial-Grade Diesel Engine: Equipped with a Yanmar LW Series 435cc air-cooled direct injection diesel engine, this generator is built to withstand heavy-duty use and provide reliable performance even in demanding environments
- Extended Runtime: The XD5000E from Generac features a 12-gallon diesel fuel tank provides an impressive run-time of 32.4 hours at 50% load, minimizing the need for frequent refueling and ensuring uninterrupted power supply for extended periods
- Durable and Strong: The 1-1/4-inch steel cradle adds strength and durability to the generator, ensuring it can handle the rigors of the job site or other challenging situations. A dependable power source engineered to keep running when you need it most
- Clean and Smooth Operation: With only 6% total harmonic distortion, this generator ensures the smooth operation of tools, appliances, and even sensitive electronics, offering peace of mind for your power needs
$4,249.00
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

WEN

WEN 4,750-Watt 120V/240V Dual Fuel Portable Generator with Wheel Kit and Electric Start (DF475T)

WEN

$439.99

$464.99
(5% Off)

More Details
Main highlights
- Voltage easily goes from 120V to 240V, perfect for transfer switches and emergency backup
- Switch between gasoline (4750 surge watts, 3800 running watt) and propane (4350 surge, 3500 running) with the simple turn of the selection dial
- Includes two 120V GFCI outlets (5-20R), a 120V/240V NEMA 30A twist lock (L14-30R), a 12V DC cigarette-lighter-style plug, a bottle of oil, a wheel and handle kit, a 47-inch LPG connection hose, and a 2-year warranty
- Electric start powers the 224cc 4-stroke OHV engine with the turn of a key
- 4-gallon tank provides up to 11 hours of half load run time
$439.99
$464.99 (5% Off)
5
Best Value
15% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

PowerSmart
15% Off

PowerSmart 3800 Watt Dual Fuel Inverter Generator, Quiet Portable Gas Propane Powered with CO Sensor and RV Ready Outlet, 149cc 4-Stroke OHV Engine for Home Backup, Camping and Tailgating

PowerSmart

$424.99

$499.99
(15% Off)

More Details
Main highlights
- 【WHISPER QUIET OPERATION】 Engineered for tranquility, this inverter generator operates at a noise rating of 70dB at 23 feet—comparable to a normal conversation. It’s the perfect companion for quiet campgrounds, tailgating, and residential areas where minimizing noise pollution is a priority.
- 【SAFE FOR SENSITIVE ELECTRONICS】 Equipped with an advanced inverter system, it produces clean, stable power (Pure Sine Wave) with less than 3% THD. Safely charge and run your smartphones, tablets, laptops, and CPAP machines without the risk of voltage spikes or frequency fluctuations.
- 【DUAL FUEL VERSATILITY】 Switch between Gasoline (3800 Surge Watts, 3300 Rated Watts) and Propane (3500 Surge Watts, 3100 Rated Watts) with ease. Our advanced dual-fuel technology provides the flexibility to choose the most available or cost-effective fuel source for long-term emergency home backup or remote camping.
- 【COMPACT & PORTABLE DESIGN】 Weighing just 50.7 lbs with a compact footprint (21.9 x 13.4 x 19.5 inches), this 149cc OHV 4-stroke engine delivers heavy-duty power in a lightweight package. The manual start system is optimized for reliable ignition in various weather conditions.
- 【CO SENSOR & SAFETY PROTECTION】 Your family's safety is our priority. Featuring a built-in Carbon Monoxide (CO) shutdown sensor, the unit automatically powers off if dangerous levels of CO are detected. Includes overload protection, low-oil shutoff, and an RV-ready TT-30R receptacle for instant power distribution.
$424.99
$499.99 (15% Off)

Best small diesel generators - May 2026

15kW Diesel Generator Enclosed with Fuel Tank

6KW Diesel Generator

Generac 6864 XD5000E 5000-Watt Diesel-Powered Portable Generator - Ideal for Emergency Backup Power and Job Sites - Reliable Power for Demanding Applications - CARB Compliant

WEN 4,750-Watt 120V/240V Dual Fuel Portable Generator with Wheel Kit and Electric Start (DF475T)

PowerSmart 3800 Watt Dual Fuel Inverter Generator, Quiet Portable Gas Propane Powered with CO Sensor and RV Ready Outlet, 149cc 4-Stroke OHV Engine for Home Backup, Camping and Tailgating

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