best diesel home standby generator

Top 6 best diesel generators

Generators are surely the lifesaving machines that keep your life running during power outages. No matter whether you need a backup power source for your home or office, these generators work well to meet your power needs.

But if you need a fuel-efficient and durable generator that needs less maintenance, then a diesel generator is the perfect choice for you.

But which of the diesel generators are best to buy? Many people ask this question, and when they fail to get the best one, they move towards the gasoline-powered generators.

So, in order to help you out in getting the best diesel unit, we have made a list of the top 6 diesel generators. All of these units are the best in the business and will meet your power needs.

But before going through the list, it is essential for you to understand why a diesel generator is a better choice for you? Also, there is a buyer’s guide section which will help you to know about the factors that you must consider before buying your best diesel generator.

Table of Contents

Portable Diesel Generator Reviews

ImageProduct NameFeaturesRatingsReviewsCheck Price
DuroStar DS7000Q Enclosed3.8 gallons fuel tank12 hours at 50% load6500 watts outputRead ReviewsCheck Price
Generac XD5000E Diesel Generatorfully welded steel frame12 gallons fuel tank30 hours at 50% loadRead ReviewsCheck Price
Pulsar PG7000D Closed Frame Diesel Generator4-gallon tank9 hours+ runtime at 50% loadfour caster wheelsRead ReviewCheck Price
Generac RD05034GDAE Diesel Generator50,000 rated watts output62 gallons fuel tank28 hours at 50% loadRead ReviewCheck Price
Onan Quiet Diesel Generator RVQD 80008000 rated watts output66 dBA noise level0.5 gallons/hr at 50% loadRead ReviewCheck Price
Power Products Sigma JDP7000-LDESilent8 hours at 50% loadair-cooled 480cc enginefour caster wheelsRead ReviewCheck Price

1. DuroStar DS7000Q Enclosed Portable Diesel Generator – Overall Best

  • Output: 6500-5500 watts
  • Fuel tank: 3.8 gallons
  • Warranty: 3 years

More Features: A maintenance-free alternator having an automatic voltage regulator system ensures constant voltage and power.Check Latest Price

Durostar diesel generator

Fuel Tank Size and Runtime: This portable diesel generator from DuroStar is one of the best generators available in the market that comes with a 3.8 gallons fuel tank having a readable gauge. It can run continuously for 12 hours at 50% load.

Power Output: The maximum output power it can produce is 6500 watts, and its running watts are 5500.

Start system: The unit comes with both electric and recoil start systems for your convenience. Also, there is a remote control option.

Engine: It has a powerful 9 HP, 418cc single-cylinder, 4-cycle diesel engine that is fuel-efficient. It has an advanced direct fuel injection system that ensures low fuel utilization but meets all your power needs.

Safety Features: A maintenance-free alternator having an automatic voltage regulator system ensures constant voltage and power. Also, there is an automatic low-oil shutdown sensor.

Noise Level: The fully enclosed frame provides great protection to the engine and the overall generator. This also helps to reduce noise levels along with a super quiet muffler and soundproof system. The unit operates between 65 dBA and 70 dBA.

Control Panel: If we focus on its control panel, then it features a voltage meter, circuit breakers, low-oil and low fuel indicators, and power outlets. There are two GFCI protected, 120V 20A, 3-prong household power outlets. Also, a 120V 30A, 3-prong outlet, and one 120/240V 30A, the 4-prong outlet is part of the control panel.

Weight and Warranty: It has a weight of 305 pounds, which makes it quite a heavy unit. But the four caster wheels allow easy movement and make it portable. Also, the unit is backed by a 3-year warranty.

2. Generac XD5000E Diesel Powered Portable Generator – Excellent Run Time

Generac portable generator

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Weight: Another quality diesel generator on our list is the Generac XD5000E. It features a fully welded 1-1/4-inch steel frame that is quite sturdy and adds durability to the unit. It has a weight of 254 pounds that makes it a heavy unit.

Portability: Tires are not part of the generator; you have to buy the wheel kit separately to travel long distances. But there is a lifting eye that makes movement easy from one place to another.

Engine: It is powered with a Yamar LW Series 435cc engine having a direct fuel injection system. This industrial-grade diesel engine is very powerful that it easily deals with large scale operations.

Fuel Tank size and Runtime: The unit comes with an excellent fuel tank capacity of 12 gallons and offers a run time of more than 30 hours at 50% load. It means you can keep your appliances in working condition for more than a day during a power outage.

Power Output: It produces 5500 peak watts and 5000 rated watts. The best thing about this Generac XD5000E is its less than 5% total harmonic distortion. The generator is featured with a True Power Technology that ensures this notable harmonic distortion that is ideal for your sensitive electronics.

Start System: It comes with both electric and recoil start systems.

Control Panel: Its control panel is easy to access where you will find four 120V AC 20A household outlets, two 120V twist-lock power outlets, and an hour meter. Also, there are two 20A and a 30A push-button circuit breaker along with a 23A main circuit breaker.

Noise Level: The unit is noisy, having a decibel rating of 72 dBA.

3. Pulsar PG7000D Closed Frame Diesel Powered Generator – Best Budget Diesel Generator

Pulsar diesel powered generator

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Fuel Tank Size and Runtime: It comes with a 4-gallon tank capacity and can run for more than 9 hours at 50% load. The tank also features a fuel gauge.

Noise Level: The fully enclosed frame is to protect the unit from any harm and to reduce the noise levels. It has a decibel rating of 68 dBA, which is due to a specially designed insulation system.

Engine: Its 10HP single cylinder, 4-stroke OHV engine features an air cooling technology that also ensures less sound during operation.

Power Output: If we talk about the maximum output power this unit can produce, then it is 7000 watts. Also, it generates 5000 rated watts. This starting and running power output is enough to meet your power needs.

Start System: It has an electric start system that includes a maintenance-free battery. Also, there is a recoil start option for emergency purposes.

Control Panel: Its control panel is very intuitive. If we focus on the power outlets, then they are five altogether. Two of them are the 120V AC household outlets, and one is the 12V DC outlet. The other two outlets include a 120V twist-lock outlet and a 120/240V twist-lock outlet. Along with the power outlets, the control panel features a voltage meter and an hour meter.

Weight and Warranty: Its weight is 353 pounds and has a 2-year limited warranty.

Portability: The four caster wheels allow easy movement from one place to another. Also, two ergonomically designed handles on both the front and back sides make it easy to pull and push the unit.

4. Generac RD05034GDAE Protector Series Diesel Home Standby Generator – Heaviest Standby Diesel Generator

Generac Protector series diesel generator

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Weight and Warranty: The biggest diesel generator on our list is the Generac RD05034GDAE that weighs 2114 pounds. It is also backed by a 5-year limited time warranty.

Power Output: It is ideal for big homes, offices, and flats. It can produce 50,000 rated watts. It is one of the most powerful diesel generators available in the market that can meet all your power needs. You can run your air conditioners, refrigerators, heaters, personal electronic devices, and other things at the same time with ease.

Start System: It supports both the automatic and manual start systems.

Fuel Tank Size and Runtime: It has a fuel tank capacity of 62 gallons and can run for 15 hours at 100% load and for 28 hours at 50% load.

Control Panel: Its intuitive control panel makes the unit easy to use and operate. The control panel is featured with the Evolution Controller that incorporates a variety of control features for automatic usage.

Noise Level: The Generac RD05034GDAE also offers ultra-quiet operation. It has a decibel rating of 70 dBA, which is nothing for such a powerful unit.

Code Ready: Other than this, the most appealing feature of this generator is that it is code ready. Now, there is no need to buy an expensive custom-figured unit when you have a code available function in this Generac generator. It is equipped with a set of popular pre-customized options that make this unit highly compatible with a wide variety of applications.

Maintenance: Not only the unit is easy to use and operate; it is also easy to maintain. The removal doors will allow you to easily refill the tank and do necessary servicing work.

5. Onan Quiet Diesel Generator RVQD 8000 –Most Expensive Diesel Generator for RVs

Onan diesel generator 8000 watt

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Power Output: It is quite a powerful diesel generator that is designed to use outdoors. With 8000 rated watts, it helps you to run your various electronic appliances during your travel through RV or at the campsites or outdoor parties.

Noise Level: The best thing about this unit is that it won’t disturb you mentally during your outdoor parties and at the campsites. It operates quietly, which is an excellent feature for light sleepers. It has a decibel rating of 66 dBA which is nothing. Also, the three-point mounting system helps to reduce vibration which also results in lower noise levels.

Fuel Consumption: If we focus on its fuel consumption then it consumes 0.5 gallons of fuel per hour at a 50% load. But at 100% load, it will consume 1.02 gallons of fuel per hour.

Start System: The unit is also easy to start and stop with the help of remote control. There is no need to go near to the unit to turn it on and off.

Weight: The unit weighs around 430 pounds. It is also an EPA certified product and meets the California standards.

6. Power Products Sigma JDP7000-LDESilent Diesel Generator – Best for Home Backup

Power Products Sigma Diesel generator

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Power Output: The last diesel generator in our list is the Sigma JDP7000-LDE by Power Products. It is another powerful generator that produces 7000 starting watts and 5500 running watts.

Engine: The unit is powered with a 4-stroke, direct injection, air-cooled 480cc engine.

Fuel Tank Size and Runtime: can run for 8 hours at 50% load on 4 gallons of fuel. The fuel gauge is a standard that comes with a low-oil shutoff sensor.

Start System: The electric start system makes it easy to turn the generator on and off. But there is no remote start option, so you have to switch it on and off manually.

Portability: The four caster wheels and a good gripping handle make this 365 pounds unit easy to move.

Noise Level: Its enclosed frame makes it a noise-free product. It has a decibel rating of 68 dBA that is acceptable.

Buyer’s Guide

In this buyer’s guide section, you will know about those things that you must look at before purchasing a diesel generator. So, what are those things? Take a look.

Types of Diesel Generator

First of all, it is necessary for you to decide which type of generator you want to buy. For this, you have to do some research to find out the types of diesel generators.

First, it is necessary to make sure whether you want a standby diesel generator or a portable diesel generator.

standby generator doesn’t need your presence to turn it on during a power outage. It automatically turns on when the light goes and keeps your appliances running.

On the other hand, a portable generator needs a person to start and stop the generator manually. But since they are portable, you can easily move them from one place to another.

That is the main difference between the two. Other differences include, all the standby generators feature fully enclosed frames whereas not all the portable diesel generators come with enclosed frames, have exposed engine parts.

In order to run your sensitive appliances, it is best to go for a standby generator. They are responsible for providing consistent and clean power to your appliances, whereas not all the portable generators are responsible for doing so.

The type further extends according to the use and purpose. So, when we classify the diesel generators according to the use and purpose, we get two types. One is the industrial generator, and the other one is the domestic generator.

The industrial diesel generator is used in industries and at the construction sites and large settings. They are the big units that produce more output power.

On the other hand, a domestic diesel generator is designed to use at homes where you need less output power to run your appliances.

Also, you can classify a diesel generator on the basis of the start-up system. Some portable generators feature recoil start systems whereas some units come with and an electric start system. Also, you will find some units that feature a remote start system or come with two or all the three start systems. On the other hand, standby generators, feature automatic or manual start systems or both of them.

Moreover, you can also classify diesel generators on the basis of their cooling systems. Some diesel generators are air-cooled diesel generators whereas some units are called water-cooled diesel generators.

In the air-cooled diesel generators, the air is responsible for cooling the heated engine. A specialized air intake system cools the burning engine. On the other hand, water-cooled diesel generator uses water to cool up the heated engine with the help of an additional radiator and water pump.

Power Outage

The power output of a diesel generator is the first thing that you should look at after selecting the type. A big unit will definitely produce more power output as compared to a small or undersized diesel generator. So, it all depends on your needs and the purpose of your usage. If you are looking for a diesel generator for your RV or a small house, then a unit having low starting and running watts will be enough. But for large settings, it is necessary to buy a generator having high power output.

Run Time

If you have a fuel-efficient diesel generator then you will get more run time. Also, the tank size of the generator determines the run time. Other than this, how much load your generator is bearing also changes the run time of the generator. Your unit will offer a different run time on 25% load and different run time on 50% load.

Noise Level

In general, diesel generators are loud. They produce more sound as compared to the gasoline generators. But it doesn’t mean that every diesel generator makes noise. Some manufacturers make these generators with the enclosed frame to reduce the operational sound. Also, they use a noise-damping feature such as muffler. Moreover, the mounting system helps to reduce vibration which also results in lower noise levels.

Control Panel

It is also necessary for you to focus on the control panel of your diesel generator to make sure that it has enough power outlets to meet your needs. Some generators come with two 120V household outlets whereas some units feature four. Also, a 120V and 120/240V twist-lock outlets are must. Moreover, a 12V DC outlet is a plus.

Other things that a control panel must feature include circuit breakers, voltmeter, an hour meter, and low-fuel and oil indicators.

Portability

If you are planning to buy a diesel generator for your RV, campsites, and tailgate parties, then the unit must be portable. We have discussed the portable diesel generators in the diesel generator types, but here you should keep in mind the following things.

First of all, make sure that the wheels available are long-lasting. The size of the wheels creates problems when you pull or push your generator on a rough surface. Small tires may create problems, but a unit with big tires will not. If your unit is small or medium-sized, then small tires may be suitable, but for bigger units, big tires are a must.

Other than this, make sure that the handle or handles are ergonomically designed so that you can pull, push, or lift your generator easily and comfortably.

Safety Features

Your diesel generator must have some safety features. The safety features include low oil and fuel indicators, overheat protection, and overload protection. Also, your unit must have a safety feature to prevent short-circuiting.

Moreover, you can also go for diesel inverter generators that feature less than 5% of total harmonic distortion. This THD rating is ideal for sensitive electronics as it ensures a clean power supply.

Price

Price is another factor that everyone should consider. If you are looking for a full-featured model, then it will be expensive, but the low-priced models come with fewer features. So, it all depends on your budget to either go for an expensive unit or a lowly-priced unit. But the most important thing is to purchase a unit that meets your power needs, no matter how much expensive it is.

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Generators have been in high demand since long now. This is due to the current predicament of the weather pattern leading to hurricanes, flooding, fires etc. In times like these, when grid power is not reliable and electricity is indispensable for retaining connectivity with the world. Generators have come through to combat this problem and in the current scenario, portable generators have been trending since some time now.

Portable diesel generators are rampantly expanding through the power equipment market, one better than the other. Inverter generators, dual fuel engines, True Power Technology, electric start remote and what not has been exemplifying the amazing innovation that has gone into manufacturing these generators in such a way so that they are not only able to operate powerfully but also are incredibly efficient and economical.

With a plethora of options in the market it is a gigantic task to just choose one and risking it all. Rest assured, we have compiled a list of the Best Portable Diesel Generators of the year right below.

8 Top Rated Diesel Powered Generators

It is difficult to choose from gasoline, propane or diesel powered generators and each type holds its own feat. The best aspect about Diesel Powered Generators is that they are very fuel efficient and run for longer durations. The below table mentions some of the Best Diesel Generator For Home Backup. They are analyzed on the basis of most efficiency provided, price value and mobility and portability. Read on to learn about them in detail and find the perfect match for your house or workplace.

1

DuroStar-DS7000Q-Image

DuroStar DS7000Q

  • Portable
  • 4- stroke direct engine
  • Efficient diesel engine
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9.8

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2

DuroMax-XP12000EH-Image

DuroMax XP12000EH

  • Portable
  • Dual- fuel efficient engine
  • Runs on gas and propane
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9.6

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3

Pulsar-10000W-PG10000B16​-Image

Pulsar PG10000B16

  • Portable
  • 10,000 Watts dual- fuel engine
  • Convenient outlets and switch & go technology
  • Budget- friendly
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9.5

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4

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DuroStar DS4000S

  • Very budget-friendly
  • Portable
  • All metal frame generator
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9.3

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5

Briggs-Stratton-30675-Q6500-Image

Briggs & Stratton 30675 Q6500

  • Portable
  • Highly-efficient 306cc Briggs & Stratton engine/ alternator
  • QuietPower series
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9.3

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6

Westinghouse-WGen7500-Image

Westinghouse WGen7500

  • Portable
  • Convenient minimal assembly setup
  • Budget friendly gas powered generator
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9.1

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7

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Champion 3800

  • Very Portable
  • Dual fuel engine
  • Extremely budget friendly
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9

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8

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Generac 6864

  • Highly efficient
  • Less portability
  • Value for money generator
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8.9

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1

DuroStar DS7000Q 6,500 Watt Enclosed Portable Diesel Generator

With an admirable peak power output of 6,000 Watt and a steady 5,500 Watt, the DuroStar DS7000Q diesel- powered generator is a reliable power companion for fields, houses, businesses and even emergency power cuts. The direct fuel injection system of the 4- stroke single- cylinder diesel engine facilitates low fuel utilization and is easy to start with just an on/off button.

The enclosed frame packed between the engine/alternator and the outer base frame helps in noise attenuation. The 3.83 gallon fuel tank comes with a readable gauge that allows the generator to run for 12 hours at ½ load.

DuroStar-DS7000Q-Image

DuroStar DS7000Q 6,500 Watt Enclosed Portable Diesel Generator

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FEATURES

  • Power source – Gas Powered
  • Wattage – 6,000 Watt
  • Manufacturer – DuroStar
  • Fuel tank capacity – 3.8 Gallon
  • Batteries: 1 Nonstandard Battery batteries required. (included)

SPECIFICATIONS

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ITEM WEIGHT

305 pounds

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DIMENSIONS

37.8 x 22 x 30.3 inches

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MODEL NUMBER

DS7000Q

The 4 single- cylinder engine has a constant power output of 5,500 Watt that can be raised up to 6,000 Watt that works with a 3. 8 gallon fuel tank that allows a 12- hour long run at ½ load and has a direct fuel injection system that uses less fuel making it more efficient and economical.

The generator has a well laid out control panel that consists of the start/stop button, the voltmeter, circuit- breaker and also offers two 120- V, 20 A, 3- prong outlets alongside a ground fault interrupter that can be plugged into home (less power consuming) appliances.

There are also 2 twist- lock outlets that can power high power- consuming machinery and tools, they are 120 V, 30 A, 3-prong outlet and another 120/240 V, 30 A, 4-prong outlet.

PROS

  • Very quiet due to sound mufflers.

CONS

  • Exhaust pipe can fill with water from outside.

2

DuroMax Hybrid Dual Fuel XP12000EH 12,000-Watt Portable Generator

With a massive 12,000 Watt power output and dual fuel engine, the DuroMax Hybrid Dual Fuel XP12000EH 12,000-Watt Portable Generator is deal- breaker when it comes to the business of portable generators. Being versatile, the dual fuel engine can run either on gasoline or propane.

While the conventional gasoline is well- tested and dependable, propane is not only economical but also a very efficient and environment- friendly fuel with it being completely combustible and cheaper than gasoline.

The engine is a 457cc, 18HP DuroMax OHV that can fully power two 120V, 20 A outlets, one 120 V, 30 A twist lock outlet and an intense 50 A outlet to power the most intense tools and appliances.

DuroMax-XP12000EH-Image

DuroMax Hybrid Dual Fuel XP12000EH 12,000-Watt Portable Generator

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FEATURES

  • Power source – Gasoline/ Propane
  • Wattage – 12,000 W (Gasoline)/ 11,400 W (Propane)
  • Fuel tank capacity – 8.3 Gallon
  • Batteries – 1 Nonstandard Battery batteries required. (included)
  • Warranty – 3 years
  • Engine size – 457cc

SPECIFICATIONS

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ITEM WEIGHT

227 lbs

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DIMENSIONS

29 x 29 x 27.5 inches

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MODEL NUMBER

XP12000EH

The engine is an intense 457cc, 18HP DuroMax OHV that can run on either propane or gasoline and provides a power output of 12,000 Watt and 11,400 Watt through gasoline and propane, respectively.

It has two 120V/20A outlets and one 120V/30A twist- lock outlet along with one massive 50A outlet to power much taxing appliances and machinery. With such large power output and heavy- duty engine, the generator is only 227 pounds and is easily portable.

The sturdy all- metal frame and fully framed and encased motor results in very reduced and muffles noise and vibrations. Its portability increases with strong, solid- fill tires.

PROS

  • Quiet and powerful.

CONS

  • Insufficient power outlets.

3

Pulsar 10,000W Dual Fuel Portable Generator, CARB Approved with Switch & Go Technology & Electric Start, PG10000B16

This portable generator comes with a Switch & Go technology that shows off its dual fuel engine and helps it switch between the gasoline and liquid propane mode with the utmost ease and smoothness.

The air- cooled 420cc, 4- stroke OHV engine gives a peak power output of 10,000 Watt and a constant 8,000 Watt when run on gasoline; and 9,000 peak Watt and steady 7,000 Watt when run on LPG.

It has both, an electric start as well as recoil start. It has a strong steel frame with drop down handles that make it easy to store and handle.

Pulsar-10000W-PG10000B16​-Image

Pulsar 10,000W Dual Fuel Portable Generator, PG10000B16

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FEATURES

  • Power source – Gasoline / Liquid propane
  • Wattage – 10,000 W (Gasoline)/ 9,000 W (LPG)
  • Fuel tank capacity – 10,000 W (Gasoline)/ 9,000 W (LPG)
  • Run time per tank – 12 hours at half load
  • Batteries – 1 Nonstandard Battery batteries required. (included)
  • Engine size – 420 cc

SPECIFICATIONS

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ITEM WEIGHT

209 pounds

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DIMENSIONS

28.5 x 22.2 x 21.8 inches

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MODEL NUMBER

PG10000B16

The dual fuel system of the 420cc, 4- stroke OHV engine allows it to run on gasoline as well as LPG making it economical and efficient. It comes with a Switch and Go technology that enables the generator to switch from gasoline to gas and vice- versa.

The power output from the engine is 10,000 W/ 8,000 W for gasoline and 9,000 W/ 7,000 W for LPG. The fuel tank can hold 6.6 Gallons of fuel and run for 12 hours at half load.

There are four 120 V outlets, one 120 V/240 V Twist- lock outlet and one major 120/240v 50 A RV port making it a choice for RV Diesel Generator. Backed up for recoil, it also has an electric start option.

PROS

  • Adequate number of power outlets.
  • Easy switching between dual fuel modes

CONS

  • A little pricey.

4

DuroStar DS4000S, 3300 Running Watts/4000 Starting Watts, Gas Powered Portable Generator

The gas- powered DuroStar DS4000S, 3300 portable generator is the right choice for personal outdoor uses like camping, tailgate parties, garden appliances, etc. It runs on gas and will shut down automatically when fuel is low to prevent damage to the machinery.

This affordable and handy generator is protected against power surges and is great for light- duty appliances from gardening tools to air conditioners. The 7.0-horsepower air-cooled overhead valve engine gives a peak power of 4,000 W and a constant running power of 3,300 W.

DuroStar-DS4000S-Image

DuroStar DS4000S, Gas Powered Portable Generator

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FEATURES

  • Power source – Gas
  • Wattage – 3,300 W
  • Fuel tank capacity – 3.96 Gallon
  • Run time per tank – 8 hours
  • Batteries – 1 Nonstandard Battery batteries required. (included)
  • Warranty – 24 months factory warranty
  • Engine size – 208 cc

SPECIFICATIONS

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ITEM WEIGHT

102 pounds

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DIMENSIONS

23 x 18 x 17.5 inches

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MODEL NUMBER

DS4000S

This 102 lbs. generator is fully metal constructed for utmost endurance and strength. The 3.96 gallon fuel tank allows the 208cc 7HP engine to run for 8 hours on a full tank.

There are two 120 V household power outlets and one 120V twist lock outlet.

PROS

  • Reasonably priced.
  • Powerful

CONS

  • A bit too noisy.

5

Briggs & Stratton 30675 Q6500 Inverter Generator – 6500 Starting Watts QuietPower Series Portable Generator for Home Backup

The Briggs & Stratton 30675 Q6500 can easily be called the Best Diesel Generator for Home Backup. This inverter generator is the best or domestic uses and appliances as it is 60% softer as opposed to a standard generator making it a Super Quiet Diesel Generator. It is also comfortable to transfer from one place to another as its design is 45% more compact and 30% lighter against a typical portable generator.

With amazing power output of 6,500 starting Watts and 5,000 running Watts, the 306cc integrated engine/alternators is very fuel efficient. At 25% load and with a 5 gallon fuel tank it can run for up to 14 hours. Its portability is enhanced due to its luggage- style handling that makes it super easy and comfortable to glide across surfaces as on would do with a luggage bag.

Briggs-Stratton-30675-Q6500-Image

Briggs & Stratton 30675 Q6500 Inverter Generator

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FEATURES

  • Power source – Gasoline
  • Wattage – 6,500 W peak/ 5,000 W steady
  • Fuel tank capacity – 5 Gallon
  • Run time per tank – 14 hours at 25% load
  • Batteries – 1 Nonstandard Battery batteries required. (included)
  • Warranty – 24 months factory warranty
  • Engine size – 306 cc

SPECIFICATIONS

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ITEM WEIGHT

135 lbs

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DIMENSIONS

25.5 x 21.1 x 21.4 inches

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MODEL NUMBER

30675

The 306 cc engine of the Briggs & Stratton 30675 Q6500 generator powers at peaks 6,500 W and at constant 5,000 W and runs on gasoline. The 135 pounds generator is compact in design and is lighter by 30% than a common generator. There are four 120V-20A outlets, two USB outlets & one 120V-240V locking outlet. RV adapter in the twist lock outlet can give 2,500 W of nonstop power.

PROS

  • Quieter as compared to its counterparts.
  • It is very portable as it is 30% lighter than a standard inverter generator and comes with luggage style handling.
  • It is also very fuel efficient. At 25% load it 30% more fuel saving than its counterparts.

CONS

  • No facility for electric start.

6

Westinghouse WGen7500 Portable Generator with Remote Electric Start – 7500 Rated Watts & 9500 Peak Watts – Gas Powered – CARB Compliant – Transfer Switch Ready

The Westinghouse WGen7500 Portable Generator is a pleasurable machine due to its immensely user- friendly model and minimal assembly requirement. This is because it is equipped with an electric start button remote that just pushes the generator into action in just a moment. It also has the traditional recoil start.

Boasting a 420 cc Westinghouse 4-Stroke OHV Engine, the WGen 7500 powers through 7,500 W at steady running and 9,500 W at peak. It is enabled to shut down automatically when fuel is low to prevent it from withering and losing viscosity. The Westinghouse engines have an overhead valve technology that enable it to work at even lower temperatures and uses less fuel than traditional side valve engines.

The WGen 7500 has a robust casing of hardened steel- frame that has roll bars that secures the fuel tank completely and GFCI power outlets are rubber covered to provide additional protection against the corrosion and damage from its environment.

Westinghouse-WGen7500-Image

Westinghouse WGen7500 Portable Generator with Remote Electric Start

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FEATURES

  • Power source – gasoline
  • Wattage – 9,500 W peak/ 7,500 W steady
  • Fuel tank capacity – 6.6 Gallon
  • Run time per tank – Up to 16 hours
  • Batteries – 1 Nonstandard Battery batteries required. (included)
  • Warranty – 3 year factory warranty
  • Engine size – 420 cc

SPECIFICATIONS

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ITEM WEIGHT

192 pounds

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DIMENSIONS

27.3 x 26.2 x 26.2 inches

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MODEL NUMBER

WGen 7500

With 7,500 steady W/ 9,500 peak W, the 420 cc Westinghouse 4- stroke engine runs on gasoline that is filled in a 6.6 Gallon fuel tank that can run for up to 16 hours when the tank is full. There are two Ground Fault Circuit Interrupters- 5-20R 120V Household Duplex Receptacle and One L14-30R 120/240V Twist-Lock Receptacle.

Requires least assembly and starts with a button on a remote fob and 12 V battery charger. There are four 120/240 v outlets and a digital hour meter.

PROS

  • Minimal assembly requirement- very user friendly, comes with a great manual and is almost assembled.
  • A cast iron sleeve protects the engine.
  • Great factory service and customer care.

CONS

  • A little on the expensive side.

7

Champion 3800-Watt Dual Fuel RV Ready Portable Generator with Electric Start

While looking for an Rv Diesel Generator, the Champion Power Equipment 76533 3800 Watt Dual Fuel RV Ready portable generator is where one should stop to look. The generator can run on either gas or propane and comes with a propane hose for immediate use using propane as fuel.

The engine has an electric start that can be pushed into action by just one touch. The 224 cc Champion engine can power at 4750 starting W and 3800 running W when run on gasoline and for propane can a power of 4275 stating W and 3420 running W.

The Small Portable Diesel Generator is very RV- friendly with its 30A RV and is very portable with never- flat tires. The 224cc Champion single-cylinder OHV engine comes with a 3.4 gallon fuel tank and automatic low- oil shut down to prevent withering and retaining viscosity of the machine.

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Champion 3800-Watt Dual Fuel RV Ready Portable Generator

CHECK PRICE

FEATURES

  • Power source – Gasoline/ Propane
  • Wattage – 3,800 Watt
  • Fuel tank capacity – 3.4 Gallon
  • Run time per tank – At ½ load, 10.5 hrs. (Propane) and 9 hrs. (Gasoline)
  • Batteries – 1 Nonstandard Battery batteries required. (included)
  • Warranty – 3 year factory warranty
  • Engine size – 224 cc

SPECIFICATIONS

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ITEM WEIGHT

122 lbs

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DIMENSIONS

22.8 x 22 x 30.7 inches

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MODEL NUMBER

76533

The generator has a 4 stroke, 224 cc Champion engine that can be started with a touch and produces an output of 4,750 starting W and 3, 800 running W for 9 hours on a full tank of gasoline and 10.5 hours on 20 pounds of propane. The tank has a 3.4 Gallon capacity.

There is one 120V 30A RV outlet, one 120V 30A locking outlet and two 120V 20A household outlets, all protected against power surges. The generator also has a low- oil shut down mechanism and a cast iron sleeve for endurance.

PROS

  • Very portable with never- flat tires that do not suffer from puncturing.
  • Cast iron sleeve for resilience.
  • Best suitable for RVs

CONS

8

Generac 6864, 5000 Running Watts/5500 Starting Watts, Diesel Powered Portable Generator

With an impressive below 5 % harmonic distortion, the Generac 6864, 5000 uses True Power Technology to create Diesel Powered Generators that have finesse and sensitivity in their electronics and operations.

It has an electric start which can be started by just one touch. It is especially built for professionals and work sites and thus it has a 1- ¼” steel frame that not only protects it but gives it the durability to weather any storm. Its 435cc engine and 12 gallon fuel tank can, at 50 % load, run for 32.4 intense hours.

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Generac 6864, 5000 Running Watts/5500 Starting Watts, Diesel Powered Portable Generator

CHECK PRICE

FEATURES

  • Power source – Corded- electric
  • Wattage – 5,000 W
  • Capacity: 6.6 Gallon Fuel Tank.
  • Fuel tank capacity – 12 Gallon
  • Run time per tank – At 50% load, 32.4 hours
  • Batteries – 1 Nonstandard Battery batteries required. (included)
  • Engine size – 435 cc

SPECIFICATIONS

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ITEM WEIGHT

254 lbs

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DIMENSIONS

33.1 x 22.5 x 25.6 inches

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MODEL NUMBER

6864

Equipped with the air- cooled Yanmar LW Series 435cc engine that uses single injection fuel technique which leads to efficient fuel consumption, the Generac 6864 5000 is made with True Power Technology that reduces it harmonic distortion to less than 5%.

The generator has a lifting eye to make it easy to carry around and port. The tank is a massive 12 Gallon which when fully filled, allows the generator to run for 32.4 long hours at 50% load. It consist of a voltage selector 10/240 V and an hour meter that denotes maintenance intervals. For protection it has a 1- ¼” steel frame.

PROS

  • Very long running capacity at full tank. 32.4 hours at 50% load.
  • 1 1/4″ steel frame and lifting eye give the generator lot of durability, protection and permanence.

CONS

  • No wheels on the generator.
  • Large size. Inconvenient to store.
  • Not suitable for domestic purposes.

How did we decide this list as Top 10?

Behind this Top 10 list there is 60 hours of research. We contemplated more than 30 models and compared their features, specifications, and price. For complete knowledge on these models, we have analyzed upto 150 reviews. And finally, we came up with this Top 10 diesel generators list to match the requirement of each and every user.

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60 hrs+

RESEARCH

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30+

MODELS CONSIDERED

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150+

REVIEWS COMPARED

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3

EXPERTS INVOLVED

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DIESEL GENERATOR BUYING GUIDE​

It is important to consider different factors before buying a Diesel generator. This buying guide helps you know what are those. Also, gain some knowledge on how it works, why we need it, and what are the top brands that are offering diesel generators, etc. from this guide.

Why do we need a Diesel Generator?

Diesel generators are widely- used, dependable sources of long- lasting energy used by houses, industries, schools, business, and etcetera. These are essentially required in cases of prolonged consumption and provide a smooth and regular voltage supply as opposed to its utility power. These are alternative sources of power when there is no source of utility or grid power.

In case of grid power absence, a diesel generator can be used for long durations with less care and proves to be a robust and reliable source of energy. For off- grid projects and businesses where there are no power lines available and power is required for machinery and other applications, a Diesel Powered Generator acts as a great alternative.

Also, during climatic disasters, diesel generators can power up houses and buildings for many days as long as the fuel tank is filled. This prevents disconnection with the world and helps in better coping and management.

How does a Diesel Generator work?

In basic terms, a diesel generator works by converting mechanical energy into electrical energy. Now this electrical energy is not your conventional power plant electricity but is the result of electric current due to electromagnetic induction. This is the theoretical principle behind the working of a diesel generator.

A diesel generator has essentially 9 physical components that comprise the whole machine, they are, the engine, Alternator, Fuel system, Voltage regulator, Cooling and exhaust systems, Lubrication systems, Battery charger, Control Panel and Main Assembly Frame.

The Engine is the source of mechanical energy that is to be converted into electrical energy. This is achieved by a component of the alternator, called Armature or Rotor which is surrounded by powerful magnets. The armature rotates in central to the position of the permanent magnets, thus establishing an electromagnetic field. Another necessary sub- unit of the alternator is the Stator which are basically wire conductors that are firmly coiled around the rotor.

When mechanical energy from the diesel engine causes the rotor to move continually along the north and south poles of the magnetic field produced by the permanent magnets, the stator or bundled coils wrapped around it conduct a large amount of ‘to and fro’ electric current or AC (Alternating Current).

The fuel system has a tank and pipe that consist of the fuel, which, for a Diesel Powered Generator is diesel, that is required to spark the engine. The voltage regulator, as the name suggests, works to regulate the voltage to avoid the fluctuations in current output as the AC mains are large amounts unsteady current.

Since there is a lot of physical action that takes place for a very long duration in a Diesel generator, the machine tends to get very hot which is very undesirable and thus a coolant is given to the system to counter the heating effect produced by the machine. The exhaust releases the gases produced in the generator, through a pipe, outside of the generator. The Lubrication system helps relieve the machine from excess friction and the consequent withering from it and also facilitates smooth functioning of the generator.

Battery charger is used to charge the battery of the electric motor connected to the machine that starts the engine. The Control Panel can comprise of a start button in case of manual starting of the generator and can contain a lot other controls like the frequency check, statistics about the fuel and the coolant and etcetera.

The Main Assembly Frame is basically just a body that encases the whole generator into one body and protects its inside machinery from corrosion due to outside factors like rain, moisture, dust, etc. It also helps in diminution of the noise from the generator.

A larger engine and fuel tank can be used when there is a need of greater power output and usage for longer duration without constant refilling of the fuel tank.

Types of generators

Portable Generators:

Portable generators can either be powered by gas or diesel. They are used for temporary power supply and act as backups in times of grid power outage due to bad weather, natural disasters or repair and maintenance. These are used mostly used for domestic and personal uses but are also used widely by businesses to power light to moderate tools and machinery.

They have power outlets that can be plugged into by several appliances and tools that need power. Portable gensets are used for several purposes like tailgate parties, gardening, camping, RVs, business sites, etc.

Inverter Generators:

As the name suggests, an inverter generator works by converting the AC power produced by the generator into DC power using a switch that open and closes to change the polarity of the current and this current then flows through the circuit. This is the new Direct Current which is then again converted into AC power by an inverter.

This is done because the AC power has a lot of distortions and fluctuations and is not very smooth. By converting it into DC and then back into AC using mathematical algorithms helps it to overcome such distortions and in fact become better in comparison to grid power. Due to this working of an inverter generator, it has better fuel efficiency, more power output and newer designs are way quieter than the older ones.

Standby Generators:

These generators are the ones that can sense power outage on their own and come in play automatically by a transfer switch that sense the power cut and transfers all the electrical load from the electrical circuit of the building or house onto the generator.

They run on either gas, liquid propane or diesel. The air- cooled units are capable of powering certain appliances while the liquid- cooled gensets can power an entire house. They need to be fueled and cannot run infinitely

Diesel vs. Gasoline vs. Gas generators

This demarcation amongst the three is made on the basis of the fuel used by the generator.

Diesel generatorGasoline generatorGas generator
These use diesel as the fuel.These use gasoline as the fuel in the generatorThese use natural gas or liquid propane as the fuel
Diesel is not a clean fuel but has better combustibility than gasoline. It is the most efficient as it uses the lowest amount of fuel to produce the same amount of powerGasoline is not a clean fuel and less efficient than diesel because it works with a carburetor that mixes air and fuel which leads to less efficient use.Gas is the cleanest fuel amongst diesel, gasoline and itself.
It has the most power output as compared to gasoline and gas generators.It has better power output than gas generators but lower than diesel generators.It is fully combustible
These are more resilient and require less maintenance.As compared to diesel generators, these require more maintenance and can wear faster.Gas is distributed through pipelines and in case of a disruption of pipeline, it will not be workable.
Although, diesel is more expensive than gasoline and gas.These generators do not give a lot of power output as compared to its counterparts.
This uses the cheapest fuel.

Best Diesel Generator Brands

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HONDA

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DUROSTAR

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CHAMPION

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GENERAC

HONDA


Honda is a well- established and prominent multinational corporation known for its vehicles and power equipment. The first Honda generator was launched in 1965. It was the E300 portable generator with 300 VA output. As of today, Honda sells 21 types of generators to its buyers.

DUROSTAR


DuroStar is line of power equipment launched by the power systems company DuroMax. The DuroStar generators comprise of 11 portable generators that are dual fuel, gas based and gasoline based.

CHAMPION


Since 2003, Champion is a renowned US- based company that manufactures and sells power equipment.

GENERAC


Generac Power Systems was founded in 1959 and was the first to launch a standby generator. It stands for its mighty reputation and has over 50 years of experience on power equipment and especially in generator manufacturing.

What to look for in the Best Diesel Generator for home?

Diesel generators for domestic purposes need to be compact, easy to move around, easy to use and should be able to sufficiently power most domestic appliances. While purchasing a genset, one needs to be completely knowledgable of the power required by appliances in their house and the overall load. Proper calculation and estimation should be done beforehand to ensure that the diesel generator purchased is sufficiently able to power the household.

The criteria for choosing the Best Diesel Generator for Home Use is as follows:

WATTAGE


After calculating the total amount of power consumed by several appliances and tools in a household, it becomes important to know about the wattage the gensets in the markets have to offer. It then becomes important to choose a generator that will adequately be able to power the household without overbearing itself.

SIZE


Since what you’re looking for is a domestic generator, it is very crucial that the dimensions of the generator are reasonable and in accordance to your storing facility. Very bulky gensets can be hard to store, maintain and move around.

PORTABILITY


Domestic generators should be portable so that they can be used for gardening, camping and other such personal activities. It is better to search for gensets with wheels.

NUMBER OF OUTLETS


 While it is vital to find a genset that can power heftier electrical appliances, it is also essential that the genset has a reasonable amount of power outlets so that the user can plug their desired and practical amount of tools and appliances into it.

FUEL EFFICIENCY


 There are gensets that turn off automatically when there is low fuel in the system and have mechanisms that enable saving up on fuel by making the most efficient use of it. You don’t want to be spending too much on fuel after you’ve just spent on the genset!

DURABILITY AND NOISE ATTENUATION


Generators are innately sturdy machines that should take very little care but that is ensured by their protective casing and vibration mounting. It is very obvious to look for gensets that are nicely encased and framed to give you the best permanence out of the machine.

It is also essential that one keep in mind about the noise creation due a to a diesel generator. By simple asking for the noise created in Decibels, you can compare between gensets and then choose the one with the least amount of noise Decibels.

Frequently Asked Questions (FAQ)

Can sensitive equipment be operated from a generator?

Generators do not give as stable power as a supply from mains. As the fuel gets lower in quantity, the instability of the generator may increase and the engine might surge. If you have to use any sensitive equipment, you should opt for a UPS (Uninterrupted Power Supply). They are mostly bought with computers to prevent loss of data in the event of a power cut.What is the right size of diesel generator for my house?

To know the right size of Diesel Powered Generator for your home, you need to consider many factors. If you’re looking for a portable generator, you might want a generator that is smaller in size, otherwise depending on the space in your house that can comfortably fit a generator you can look for a generator.

Final Verdict

By this point it must have become clearer to you as to what YOU seek in your ideal generator. To sum it up, it should be clear that while most of the above mentioned diesel generators are versatile and can be used for domestic as well as industrial uses, products like Generac 6864, 5000 Running Watts/5500 Starting Watts, Diesel Powered Portable Generator are especially built for work sites and are not very portable. For RVs or mobile homes, Champion 3800-Watt Dual Fuel RV Ready Portable Generator with Electric Start should be a perfect match.

The Westinghouse WGen7500 Portable Generator with Remote Electric Start – 7500 Rated Watts & 9500 Peak Watts – Gas Powered – CARB Compliant – Transfer Switch Ready is more appropriate for domestic uses especially for inexperienced or elderly users.

While each gen set has its own virtues, it all boils down to the user’s need and which product compliments that need while also fairly settling with all other needs too. Reason your way to the right generator and power through!

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