13 Best Diesel Generator of 2023 Reviews

• Best Overall: Westinghouse 12500 Peak Watt Dual Fuel Home Backup Portable Generator

• Best Budget: WEN DF1100T 11,000-Watt 120V/240V Dual Fuel Portable Generator

• Best Value: Kohler 20RCAL-200SELS 20kW Standby Generator

• Editor's Choise: Runhood Portable Power Station Rallye 600 Pro

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#1 Kohler 20RCAL-200SELS 20kW Standby Generator

Specs:

• Brand: Kohler
• Wattage: 20000 watts
• Fuel Type: Liquid propane
• Power Source: Dual Fuel
• Item Weight: 611 Pounds
• Color: Tan
• Product Dimensions: 47"L x 26.2"W x 32.2"H
• Model Name: 20kW Standby Generator
• Engine Type: 4 Stroke
• Frequency: 50 Hz

What we like:

The 20kW Kohler 20RCAL-200SELS Standby Generator is a premium generator with advanced voltage and frequency regulation. This generator can restore power autonomously within 10 seconds, making it a reliable source of power during power outages. It can operate on natural gas or liquid propane and includes an RXT 200-amp outdoor-rated, service entrance-rated automatic transfer valve.

The Kohler 20RCAL-200SELS is propelled by a dependable Kohler Command PRO engine that has been developed and tested for use in demanding commercial applications. It has hydraulic valve lifters that eradicate the need for costly valve adjustments and lengthy break-in periods. The engine is also equipped with PowerBoost technology, which provides the power necessary to initiate large loads, such as central air conditioners, without interrupting power to other devices.

What we don't like:

The price is one of the major drawbacks of the Kohler 20RCAL-200SELS 20kW Standby Generator. Many consumers cannot afford it because it is one of the most expensive generators on the market. In addition, its 611-pound weight makes it difficult to transport and install.

Our Verdict:

The Kohler 20RCAL-200SELS 20kW Standby Generator is an excellent option for those who require a dependable power source during blackouts. It is a premium generator with advanced voltage and frequency regulation, and it can operate on either natural gas or liquefied propane. Nevertheless, its high cost and weight may make it inaccessible to some consumers. If you have the funds and need for a premium standby generator, the Kohler 20RCAL-200SELS is an excellent option.

#2 Runhood Portable Power Station Rallye 600 Pro

Specs:

• Brand: RUNHOOD
• Wattage: 1296 Watt-hours
• Fuel Type: Gasoline
• Power Source: Solar Powered; Battery Powered; Car Powered
• Item Weight: 16.8 Pounds
• Voltage: 110 Volts
• Output Wattage: 600 Watts
• Special Feature: Modular Design, Swappable Lithium Energy Bar Backup Batteries, Expandable Battery Capacity
• Included Components: 1* Runhood Rallye 600 Pro portable power station (including HE600, 4324Wh EB324 energy bar batteries), 1SERI 100W solar panel, 1180W AC adapter, 1 120W car charger cable, 1AC connector, 1USB connector, 1* solar panel connector, 1* user manual.

What we like:

Modular design with interchangeable lithium energy bar backup batteries is a distinguishing feature that enables limitless, long-lasting power.
The rallye 600 Pro has multiple fueling options, including solar power, battery power, and vehicle power.
With a maximum output of 600W and the ability to simultaneously power nine essential appliances, this portable power station is extremely useful.
The package includes the solar panel, AC adapter, vehicle charger cable, and connectors required for charging and operating the power station.
Runhood, a company renowned for its craftsmanship and attention to detail, manufactures the product.

What we don't like:

The product's weight of 16.8 pounds may make it difficult to transport over extended distances.
This portable power station utilises petroleum, which may be inconvenient to purchase and store.

Our Verdict:

The Runhood Portable Power Station Rallye 600 Pro is an excellent option for anyone who requires a dependable and adaptable power source for camping or emergency situations. Its interchangeable lithium energy bar backup batteries and modular design distinguish it from other portable power stations on the market. With multiple charging options and a maximum output of 600W, it can simultaneously power multiple appliances. Although the product is relatively weighty and utilises gasoline as a fuel source, these disadvantages are outweighed by its numerous advantages. Overall, the Runhood Portable Power Station Rallye 600 Pro comes highly recommended.

#3 Westinghouse 12500 Peak Watt Dual Fuel Home Backup Portable Generator

Specs:

• Brand: Westinghouse Outdoor Power Equipment
• Wattage: 12500 watts
• Fuel Type: Dual Fuel (Gasoline and Propane)
• Power Source: Gasoline
• Recommended Uses For Product: Residential
• Voltage: 120 Volts
• Output Wattage: 12500 Watts (Gasoline), 11200 Watts (Propane)
• Special Feature: Electric Start, Overload Protection, Automatic Voltage Regulation, Low Oil Shutdown, Muffler, Hour Meter, Dual Fuel, Fuel Gauge, Remote Start
• Included Components: Oil Bottle, Oil Funnel, Spark Plug Wrench, Remote, Propane Regulator/Hose, Battery Float Charger
• Color: CARB Compliant
• Running Time: Up to 12 Hours on a 6.6 Gallon Fuel Tank
• Outlets: Two GFCI 120V 5-20R Standard Household Receptacle, One Transfer Switch Ready 120V L14-30R, and One RV Ready 120/240V 14-50R

What we like:

Dual-fuel capability permits flexibility in fuel source selection.
The remote electric start with key fob included is practical.
Overload protection, automatic voltage regulation, and low oil shutoff increase the generator's safety and durability.
The digital hour metre and VFT display offer real-time performance updates.
Includes oil, oil funnel, spark plug spanner, and tool kit for maintenance convenience.

What we don't like:

Minimal assembly required; some users may find this challenging
Relatively hefty and cumbersome, not readily transportable
The generator could be positioned in a more versatile manner if the propane hose was lengthier.

Our Verdict:

The Westinghouse 12500 Peak Watt Dual Fuel Home Backup Portable Generator is a robust and versatile option for residential applications. The generator's dual fuel capability and remote electric start increase its convenience and adaptability, while its overload protection and low oil shutoff increase its durability. The VFT display and digital hour metre provide real-time performance updates, which facilitates maintenance. While some users may find assembly difficult and the generator is relatively large and weighty, the included oil, oil funnel, spark plug wrench, and tool kit make maintenance simple. Overall, this generator is a dependable and powerful option for those in need of a home reserve power supply.

#4 WEN DF1100T 11,000-Watt 120V/240V Dual Fuel Portable Generator

Specs:

• Brand: WEN
• Wattage: 11000 watts
• Fuel Type: Dual Fuel (Gasoline and Propane)
• Power Source: Electric
• Item Weight: 214 Pounds
• Voltage: 120 Volts
• Output Wattage: 11000 Watts
• Special Feature: Electric Start
• Included Components: Dual-Fuel Generator
• Color: Black
• Voltage range: 120V to 240V
• Run time: 8.5 hours at half load
• Outlets: four 120V GFCI outlets (5-20R), a 120V 30A twist lock outlet (L5-30R), a 120V/240V 50A outlet (NEMA 14-50R), and a 12V DC cigarette-lighter-style plug
• Warranty: Two-year warranty

What we like:

The ability to transition between gasoline and propane provides flexibility in terms of available fuel options.
The generator can be initiated with the turn of a key, making it simple to operate.
numerous outlets: The generator features numerous outlets of various types, allowing for the use of a variety of devices.
Voltage range: The 120V to 240V voltage range makes it appropriate for transfer switches and emergency backup.
At half capacity, the generator has a respectable run time of 8.5 hours.
The generator is packaged with a container of oil, a 47-inch LPG connection hose, and a two-year warranty.

What we don't like:

The generator weighs 214 pounds, making it potentially challenging to transport.
The generator is quite noisy and may not be appropriate for use in peaceful environments.

Our Verdict:

The WEN DF1100T is a dual-fuel generator that offers flexible fuel options. The electric start and multiple sockets make it user-friendly and compatible with a variety of devices. It is suitable for transfer switches and emergency backup due to its voltage range of 120V to 240V and reasonable runtime of 8.5 hours at 50% load. However, the generator's portability and use in peaceful areas may be limited by its weight and noise. Overall, the WEN DF1100T is an excellent option for those in need of a robust and adaptable generator.

#5 DuroMax XP13000EH Dual Fuel Portable Generator 13000 Watt Gas

Specs:

• Brand: DuroMax
• Wattage: 13000 watts
• Fuel Type: Gasoline/Propane
• Power Source: Gas
• Item Weight: 234 Pounds
• Voltage: 240 Volts
• Output Wattage: 13000 Watts
• Special Feature: Electric start
• Included Components: Generator
• Color: Blue/Gray

What we like:

Dual fuel technology offers the option of using either gasoline or propane as a fuel source.
It can power large loads such as refrigerators, air conditioners, and high amperage power tools due to its 13,000 starting watts and 10,500 continuous watts.
The power panel has a variety of outlets to ensure maximal compatibility with your applications.
It has been approved for use in all fifty states by the EPA and CARB, making it compliant with emissions standards.
The electric start makes starting the generator as simple as turning a key.
The generator's 10-inch wheels make it simple to transport it to various locations.
Includes a comprehensive safety manual with explicit instructions on how to safely operate the generator.

What we don't like:

The generator is quite weighty at 234 pounds, making it difficult to transport without assistance.
Propane has a shorter runtime than gasoline, making it unsuitable for those who require protracted power outages.

Our Verdict:

The DuroMax XP13000EH Dual Fuel Portable Generator is a robust and adaptable generator equipped with dual fuel technology, making it suitable for a variety of applications. The generator is EPA and CARB-approved, guaranteeing that it complies with stringent emission standards, and has an electric start for convenience. Even though the generator is quite substantial and propane has a shorter runtime than gasoline, the large number of outlets and high starting and running wattage make it a dependable backup power source for homes and businesses. Overall, we recommend the DuroMax XP13000EH Dual Fuel Portable Generator to anyone searching for a dependable and potent generator.

#6 WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator

Specs:

• Brand: WEN
• Wattage: 4000 watts
• Fuel Type: Gasoline
• Power Source: Gas Powered
• Item Weight: 66.1 Pounds
• Voltage: 120 Volts
• Output Wattage: 4000 Watts
• Special Feature: Portable
• Included Components: Inverter generator with two 120V NEMA 5-20R receptacles, two 5V USB ports, one 120V RV-ready TT-30R receptacle
• Color: Black/orange
• Dimensions: 19.8" L x 13.8" W x 18.9" H

What we like:

The WEN GN400i generator is portable and compact, making it simple to store and transport.
It has an inverter that generates stable, clean power, making it secure for use with sensitive electronics.
It has an RV-ready TT-30R plug, making it ideal for camping and outdoor activities.
The parallel-ready feature permits the connection of two WEN inverter generators to increase the total output wattage.
The generator's two 120V NEMA 5-20R outlets and two 5V USB connectors are sufficient for charging your devices.

What we don't like:

Compared to other inverter generators in its class, this generator is relatively noisy.
Due to its tiny fuel tank capacity, it may not be able to operate for an extended period of time without being refuelled.
The oil filler lid is in a difficult-to-reach location, making it difficult to access.

Our Verdict:

The WEN GN400i RV-Ready 4000-Watt Open Frame Inverter Generator is an exceptional choice for those in need of a portable and dependable power source. It is simple to transport and store because it is small and lightweight. It is safe to use with sensitive electronics due to its inverter technology, which produces clean, stable electricity. In addition, the ability to connect two WEN inverter generators for increased wattage output makes it a versatile option for outdoor activities. However, because of its loud operation and limited fuel tank capacity, it may not be the best choice for extended use.

#7 DuroMax XP13000HXT 13,000-Watt 500cc Tri Fuel Gas Propane Natural Gas Portable Generator

Specs:

• Brand: DuroMax
• Wattage: 13000 watts
• Fuel Type: Gasoline, Propane, Natural Gas
• Power Source: Fuel Powered
• Item Weight: 260 Pounds
• Voltage: 240 Volts
• Output Wattage: 13000 Watts
• Special Feature: Portable
• Included Components: Generator
• Color: Black/Blue

What we like:

Tri-Fuel Technology: This generator operates on gasoline, propane, and natural gas, giving you fuel choice freedom and flexibility.
Home Power Backup Ready: Powered by 13,000 watts, this generator can easily power your lamps, appliances, air conditioning system, and other essentials during a blackout.
This generator offers the safest generators on the market due to its CO Alert technology, which automatically shuts off the generator when a hazardous level of carbon monoxide is detected.
The generator is equipped with a robust DuroMax 500cc OHV engine that is designed to provide the most power.
The generator is equipped with the most up-to-date computer system and a large LED display so that the gas gauge, capacity gauge, voltage, frequency, and time can be viewed at a glance.

What we don't like:

This generator is quite weighty, weighing 260 pounds, making it difficult to transport.
This generator is somewhat costly in comparison to other variants on the market.

Our Verdict:

The DuroMax XP13000HXT generator is an excellent option for anyone seeking a dependable and potent generator that can operate on a variety of fuel types. This generator's CO Alert technology, advanced computer interface, and potent engine make it a safe and convenient way to power your home during a blackout. However, its weight and price may be disadvantageous for some consumers. Overall, we strongly recommend this generator to anyone seeking a reliable backup power source.

#8 DuroMax XP10000EH Dual Fuel Portable Generator - 10000 Watt Gas

Specs:

• Brand: DuroMax
• Wattage: 10000 watts
• Fuel Type: Gasoline / Propane
• Power Source: Gas-powered, Propane-powered
• Item Weight: 220 Pounds
• Voltage: 120 Volts
• Output Wattage: 10000 Watts
• Included Components: Generator
• Color: Blue, Black
• Product Dimensions: 30"L x 29"W x 26"H

What we like:

The DuroMax XP10000EH Dual Fuel Portable Generator is a dependable and powerful generator that is ideal for RV use and residential backup. Dual-fuel technology provides greater flexibility and convenience by allowing users to choose between gasoline and propane. The generator also has a powerful engine that can handle heavy loads and MX2 technology that enables users to extract the maximum amount of power from each 120-volt outlet. In addition, the idle control function saves petroleum and reduces noise.

What we don't like:

It may be difficult to transport the generator, which weighs 220 pounds, because it is relatively heavy. Some users have also reported that the generator can be difficult to start in frigid weather.

Our Verdict:

The DuroMax XP10000EH Dual Fuel Portable Generator is an excellent option for those in search of a dependable and potent generator that can be used for both home backup and RV applications. It is a versatile and convenient option due to its dual fuel technology, strong engine, and MX2 technology. We believe the benefits of this generator outweigh its weight and possible starting difficulties.

#9 A-iPower Portable Inverter Generator, 2000W Ultra-Quiet RV Ready

Specs:

• Brand: A-iPower
• Wattage: 2000 watts
• Fuel Type: Gasoline
• Power Source: Gas Powered
• Item Weight: 50 Pounds
• Voltage: 120 Volts
• Output Wattage: 2000 Watts
• Special Feature: Overload Protection, Low Oil Shutdown, Automatic Idle Control
• Included Components: Generator
• Color: Red

What we like:

The A-iPower Portable Inverter Generator is compact and lightweight, weighing only 50 pounds, making it simple to transport for camping, tailgating, and other outdoor activities.
This generator generates 2,000 starting watts and 1,600 running watts of clean and secure electricity, making it ideal for powering sensitive electronics such as phones, televisions, and laptops.
The low idle technology extends the generator's run time, allowing it to operate for up to 4 hours at 100% load and 7 hours at 50% load.
It is equipped with a low oil warning light and low oil automatic shutdown, which safeguard the engine from damage caused by insufficient oil.
With only 52 decibels of noise, the generator is ideal for use in calm environments.

What we don't like:

The power output of 2000 watts may not be sufficient for larger appliances or tools.
The generator can only operate on gasoline, which may not be as convenient or cost-effective as dual-fuel generators that are commercially available.

Our Verdict:

The A-iPower SUA2000iV Portable Inverter Generator is an excellent option for those in search of a portable generator that is portable, lightweight, and simple to operate. It generates safe and pure electricity, making it suitable for powering sensitive electronics. However, its 2000-watt power output may not be sufficient for larger appliances or tools, and it is gasoline-only. Overall, it is an excellent option for those who require a portable generator for outdoor activities or as a fallback power source in case of an emergency.

#10 DuroMax XP4850EH Generator-4850 Watt Gas

Specs:

• Brand: DuroMax
• Wattage: 4850 watts
• Fuel Type: Dual Fuel (Gas, Propane)
• Power Source: Gas-powered, Propane-powered
• Item Weight: 130 pounds
• Voltage: 120 volts
• Output Wattage: 4850 watts
• Included Components: Generator
• Color: Green
• Product Dimensions: 24"L x 17"W x 17"H

What we like:

Dual Fuel Technology provides fuel choice flexibility.
The DuroMax 210cc OHV engine provides ample power for a variety of tasks.
MX2 Technology enables optimum power output from each 120-volt outlet.
The Fully Featured Power Panel includes a vast array of outlets for maximal application compatibility.

What we don't like:

At 130 pounds, the weight of the generator is relatively substantial.
The generator's decibel level is not mentioned, which can be an important consideration for some users.

Our Verdict:

The DuroMax XP4850EH Dual Fuel Portable Generator is a dependable option for those who require a generator for large loads, such as household appliances and power tools. Its dual-fuel technology allows for the freedom and flexibility of fuel selection, while its potent engine and MX2 Technology permit the efficient use of power. The fully-equipped power panel is a bonus, as it includes a wide variety of outlets for maximal application compatibility. However, the generator's weight is a disadvantage, and the decibel level is not mentioned. This generator is an excellent option for those who require a dependable source of power for hefty loads.

#11 Generac Guardian 24kW Home Standby Generator

Specs:

• Brand: Generac
• Wattage: 24000 watts
• Fuel Type: Electric
• Power Source: Natural Gas
• Item Weight: 0.01 Ounces
• Voltage: 120 Volts (AC)
• Output Wattage: 24 Kilowatts
• Special Feature: Electric
• Included Components: Engine oil, oil funnel, handle & wheel kit, owner's manual
• Color: Beige

What we like:

The Generac Guardian 24kW residence Standby Generator has a high wattage output of 24,000 watts, allowing it to power an entire residence during a power outage.
Compared to petroleum or diesel, natural gas is a cleaner-burning and more cost-effective fuel source for the generator.
The included PWRview transfer switch enables homeowners to monitor and manage their household energy consumption, resulting in a 20% reduction in electric utility bills.
Wi-Fi connectivity enables householders to obtain real-time updates on the generator's status and required maintenance.

What we don't like:

The Generac Guardian 24kW Home Standby Generator is a premium-priced, high-end product that may not be affordable for everyone.
The generator must be professionally installed, which may increase the product's total price.

Our Verdict:

The Generac Guardian 24kW Home Standby Generator is a dependable and effective generator with a high wattage output that is powered by natural gas. The PWRview transfer switch allows homeowners to monitor and control their energy consumption, resulting in cost savings. However, the high price and requirement for professional installation may make it inaccessible to some users. If cost is not an issue, this generator is an excellent choice for homeowners who place a premium on reliability and convenience during power disruptions.

#12 196CC 2.2KW Vertical 4 Stroke 6HP Diesel Engine, Manual Start Single Cylinder Engine

Specs:

• Brand: YIYIBYUS
• Wattage: 2.2 KW
• Fuel Type: Diesel
• Power Source: Diesel-powered
• Item Weight: 44.09 Pounds
• Special Feature: Long Service Life
• Color: Red, Black
• Engine Type: 4 Stroke
• Engine Displacement: 196 Cubic Centimeters
• Frequency: 50 Hz

What we like:

Advanced software analysis and design optimisation guarantee high dependability.
High-quality fuel, inlet, and exhaust systems optimise energy efficiency and fuel economy.
The self-injection fuel system offers excellent atomization, low fuel consumption, punctual fuel injection, and a long service life.
Compared to gasoline engines, diesel engines have a small dimension and a light weight.
Enhanced with thickening, a special painting process, seam welding, and oil leakage, a gasoline tank with a large capacity and an alloy box were designed to prevent oil leakage.

What we don't like:

Some users may find the lack of an electric starter inconvenient.
Lack of information regarding pollution levels and emissions.

Our Verdict:

The YIYIBYUS 196CC 2.2KW Vertical 4 Stroke 6HP Diesel Engine is a long-lasting, dependable, and high-quality engine. It is a more fuel-efficient and lightweight alternative to petroleum engines due to its optimised fuel system, intake, and exhaust systems. The durability and prevention of oil leakage are ensured by the engine's large gasoline tank capacity and reinforced alloy box. Some users may find the manual start and dearth of information regarding noise level and emissions to be disadvantages. This engine is an excellent option for those in search of a dependable and efficient diesel-powered engine for their irrigation and drainage equipment or generator sets.

#13 GENKINS 3800 Watt Portable Inverter Generator W/ Electric Starter & Remote Controller Ultra Quiet RV

Specs:

• Brand: Genkins
• Wattage: 3800 watts
• Fuel Type: Gasoline
• Power Source: Fuel Powered
• Recommended Uses for Product: Camping, commercial, RV, emergency power backup, recreation
• Item Weight: 67 Pounds
• Voltage: 110 Volts
• Output Wattage: 3300 Watts
• Special Feature: Electric Start, remote start, pure sinewave
• Product Dimensions: 24"L x 15"W x 24"H

What we like:

The electric and remote start options make it simple to initiate the generator.
It is parallel-ready, so it can be connected to a second GENKINS generator for additional power.
The integrated fuel gauge allows you to monitor the petroleum level.
In ECO mode, the noise level is 57 dB, making it RV- and camper-friendly.

What we don't like:

With a weight of 67 pounds, the product may be difficult to transport.
It has a petroleum tank capacity of 2.11 gallons, which may not be adequate for extended use.

Our Verdict:

The GENKINS 3800 Watt Portable Inverter Generator is an excellent option for those in need of a dependable and silent generator for camping or emergency power backup. It is suitable for RV and camping use due to its low noise level and remote and electric start options. However, its weight and limited fuel tank capacity could be disadvantageous for some users.

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• Before buying a diesel generator, it is necessary to consider the following factors:
• Power Output: The generator's power output should be sufficient to meet your power requirements. Consider the amperage of your power-requiring appliances and devices.
• Diesel generators are more efficient with fuel than gasoline generators. Look for generators with low fuel consumption and maximum runtime.
• Choose a model with minimal noise levels if you're using the generator in a residential area to avoid disturbing your neighbours.
• Portability: Diesel generators can be weighty, so consider the generator's size and weight if you intend to transport it frequently.
• Choose a generator that is simple to maintain, has readily available replacement components, and repair services.

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What are the advantages of diesel generator use?

Diesel generators are fuel-efficient, durable, long-lasting, and deliver consistent power output. In addition, they are low-maintenance and possess a high resale value.

How frequently must I replace the oil in my diesel generator?

It is recommended to change the oil every 100-150 operating hours or annually, whichever occurs first.

Can a diesel generator be connected to my home's electrical system?

Yes, you can use a transfer switch to connect a diesel generator to your home's electrical system. This switch prevents the generator's power from being sent back to the grid, which would cause a power surge.

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A diesel generator is a dependable and efficient source of electricity for homes and businesses. Consider the power output, fuel efficiency, pollution level, portability, and maintenance when purchasing a diesel generator. The Generac RD17530, Caterpillar C15, and Cummins RS30 are our top selections for the best diesel generators. The high power output, fuel efficiency, and low pollution levels of these generators make them ideal for both residential and commercial applications.

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