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Home/Residential Diesel Generators Buying Guide

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Having a diesel generator set that can start anytime and light up the whole house during a power outage is reassuring!

It is also your main power guarantee for dealing with and solving various problems.

Home Silent Diesel Generator 5kW

Being unable to turn on the TV may not be a big deal.

But power outages can cause fish in the fish tank to die due to lack of oxygen, the network cannot be connected, the latest news and business opportunities are missed, the food stored in the refrigerator spoils and causes health damage, and the children cry because of boredom.

Power outages can bring many inconveniences, but having the right diesel generator can ensure your family is always prepared for various emergencies.

This article will explore how to choose the right home diesel generator set, including power selection, fuel consumption, noise, size and portability, warranty, and budget.

Understand the main performance of home diesel generators through detailed analysis and make wise decisions.

What Is A Home Diesel Generator?

A home diesel generator is a main machine that can provide onsite electricity for your home or outdoor needs.

You can also think of it as a small power plant.

It can operate independently of government public infrastructure and mains electricity and is not affected by weather, distance, and environment.

How Much Power Can A Home Diesel Generator Generate?

It is up to your needs.

Usually, it can reach 20KW to 25KW of power and can cover almost all household electricity needs.

Home Appliances

Safety Tips

Never operate a diesel generator in a closed room.

Ensure the generator is installed in a ventilated environment away from living rooms.

Types of Home Diesel Generators

Large permanent standby diesel generator (powering the whole house in an emergency), a more permanent solution than portable ones, are larger and produce more power.

It is permanently installed outdoors or basement of your house.

Large permanent standby diesel generator

It is equipped with an ATS that automatically starts when the power goes out and shuts down when it is restored. Usually, they are in water-cooled type.

Small portable diesel generator (small homes, outdoor office workplaces), a more flexible mobile power solution.

It can be moved to any place where power is needed.

Small portable diesel generator

Usually, they are in air-cooled type.

Things To Consider When Comparing Home Diesel Generators


The first and most important factor to consider when buying a diesel generator is the power capacity.

The power output of a diesel generator is usually measured in KW, KVA, and WATT, which indicates the amount of electricity that the diesel generator can produce when it is running.

If you want to determine the power output that is suitable for your home, you need to calculate the total wattage of the appliances and equipment that you want to power during a power outage.

Usually, a refrigerator requires about 600W of power, and a sewage pump requires about 1300 to 2200 watts of power to start and 800 to 1000 watts to run.

For winter areas, heaters are essential, which require about 1800 watts of power. Therefore, you must consider and judge what best suits your needs.

ApplianceWattage requirement
Air conditioner500-2,000
Space heater800-1,000

The biggest electricity guzzlers in any home, whether it’s an air conditioner, furnace, or heater, must be matched with a diesel generator that can handle these heavy loads.

Frequency of Use

Frequent Power Outages

Areas prone to severe weather such as blizzards, tornadoes, hail, hurricanes, etc. The city power construction is not perfect, and the national power grid cannot provide a stable power supply, resulting in frequent power outages, and the power outage time exceeds 14 hours per day.

Power outages

Recommend Genset Type: Large permanent standby diesel generator (water-cooled)

This type of diesel generator can generate enough electricity to power the entire home. And it can be directly connected to the home’s circuit breaker switch panel. For example, air conditioners, sewage pumps, water heaters, and water pumps. But remember, when connecting any of the above-mentioned devices, you must ensure that all devices are turned off and powered off when connected, and install a transfer switch on the circuit breaker to connect the large fixed standby diesel generator. This installation work is recommended to be handled by a professional electrician. It will be equipped with a large fuel tank can ensure it continuously works longer time.

Occasional Power Outages

Sometimes there is a power outage, but it is not common, and the power outage time is less than 2 hours per day.

Recommend Genset Type: Small portable diesel generator (air-cooled)

This type of diesel generator set can meet the power needs under temporary power outages. It does not need to power the whole house. Just need to meet the power supply of equipment in a short period.

Fuel Consumption

Fuel consumption

Diesel generators are popular with consumers for their high efficiency. However, it is still important to choose a model that can provide long-lasting power and low fuel consumption. Looking for a diesel generator with low fuel consumption and a large-capacity fuel tank can ensure that your generator can run continuously for a long time without refueling all the time

  • WALT WDG-6800DSE, 5.0kVA, 15L Tank, 8.5 hours running. 1.76L fuel consumption @ 100% load.
  • WALT WDG-7800DSE, 5.5kVA, 15L Tank, 8.5 hours running. 1.76L fuel consumption @ 100% load.
  • WALT WDG-9800DSE, 6.5kVA, 15L Tank, 8.5 hours running. 1.76L fuel consumption @ 100% load.
  • WALT WDG-12000DSE, 8.0KVA, 25L Tank, 10 hours running. 2.5L fuel consumption @ 100% load.

For more models contact us


Diesel generators will inevitably make noise when running. If you use it at home, it is recommended to choose a silent model to avoid disturbing your family or neighbors. Look for generators that are specially designed to be quiet or have noise-reduction features such as soundproof housings or mufflers.

  • WALT, Home Silent Diesel Generator WDG-6800DSE, Max 5kVA
  • WALT, Home Silent Diesel Generator, WDG-7800DSE, Max 5.5kVA
  • WALT, Home Silent Diesel Generator, WDG-9800DSE, Max 6.5kVA
  • WALT, Home Silent Diesel Generator, WDG-12000DSE, Max 8kVA
  • WALT, Home Silent Diesel Generator, WDG-16000DSE, Max 10kVA

See more models.

Size and Portability

The size and portability of the diesel generator are also important factors to consider, especially if you often need to move the diesel generator set to different locations or install it in a limited space. You need to consider the size and weight of the generator to ensure that it can be easily transported and installed without taking up too much space. In addition, look for a diesel generator with wheels or handles, which will be more convenient to move.

5kW Home Diesel Generator Installation Onsite

Brand and Warranty

When buying a diesel generator for home use, it is crucial to choose a well-known brand that provides a product warranty. This will help ensure that the generator you buy is of high quality and that the manufacturer will provide support if any defects or problems arise. Research different brands and read customer reviews to find a reliable generator that meets your requirements and comes with a good warranty. Walt Power offers a one-year or 500-hour warranty on all home diesel generator sets, giving you peace of mind


Having a sufficient budget when buying a home diesel generator can help you choose a satisfactory home diesel generator set more quickly. Because the price of diesel generators varies according to power size, style, and performance.

Other Features

Automatic transfer switch (ATS), for home diesel generator sets, install an automatic transfer switch, and the generator set will automatically start within 10 seconds when the power is off. When the power is restored, it will automatically shut down.

Automatic Transfer Switch (ATS)

Oil level gauge, you can easily check the remaining oil level so that you know when to fill the generator set with diesel

Multiple sockets, we will install multiple waterproof sockets on the generator set to connect devices to the generator, so that you can run multiple devices at the same time.

Daily Maintenance of Home Diesel Generators

No matter which generator you choose, it needs regular maintenance to ensure that it works well when you need it.

It is very important to check and change the oil in the generator. It’s recommended that you check the oil before use and change it every 100 hours or so (but sooner for new generators). While you’re checking the oil, also take the time to check the filter and spark plugs to make sure they’re in good condition.

Next, avoid leaving your generator idle for long periods. Running the generator helps burn off moisture and recharge the battery. If you don’t plan on using it for more than a few weeks, you should run it dry to avoid fuel being trapped in the lines. Lastly, be sure to store your generator properly in an appropriate manner to protect it.


Buying a diesel generator for your home can provide a reliable backup power source during power outages and emergencies. When choosing a home diesel generator, consider factors such as power output, fuel consumption, noise, size, brand, warranty, and budget to ensure you make the right decision for your family.

Buying And Contact

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Our Contact is: +8618717996108 (WhatsApp)

Ke Wong

Ke Wong

Hey, I’m Ke Wong joined WALT POWER in 2011. I spent a dozen years focused on generator set & load bank technology and solutions for the power & energy industry. WALT Power is a reliable & leading manufacturer & supplier in China, as a business director, I am so proud of our knowledge is more and more popular not only for engineers, and generator distributors but also for end-users. Hope you are enjoying our article, if any questions or comments welcome to send me sales at