What Is A Diesel Generator? How to Choose the Right Diesel Generator?

You must have often seen that most of the residential settings and commercial buildings have a backup plan for electricity. And that backup plan goes by the name of the generator. It is a machine that generates electric power at the expense of chemical energy from diesel. 

Now, there are different kinds of generators, but the main classification is done based on the fuel source of the same. The most common type of generator that is widely used in both residential and commercial properties is the diesel generators. 

Since most of us are usually not aware of this generator type, here we will discuss everything about it, starting with what exactly is a diesel-based generator to its working mechanism, and so on. 

What Is A Diesel Generator? 

A typical generator consists of a fuel source that drives the engine present inside. This engine produces a mechanical force that is then converted into an alternating cycle of current by the operation of the carbon brushes. The electric power is then fed to the mains where all the connections are present. 

The diesel generators have a diesel fuel tank. This liquid acts as the source of power for the generator itself and starts driving the motor in the engine once you switch it on. 

How Does It Work? 

Before going further, it would be better to know the working method of the generator. Even though its functioning is quite similar to a standard power source, there are some minute variations that you need to know before you look for the best diesel generators

Here, the primary source of power is the diesel fluid which is stored in a tank. When you switch on the generator, the fluid drives the motor to produce mechanical energy. This mechanical energy is then converted into the electric current with the help of a magnetic induction setup. There are two carbon brushes in the electrical circuit that rotate alternatively, producing an alternate cycle of current at the output. 

The output of the generator is connected to the main circuit of the building. After a complete cycle of AC current is generated, the electric power is transferred to the mains, which then flows to all the connected circuits in the building. 

How to Buy Diesel Generators? 

Buying diesel generators is not an easy task, especially when you are not well informed about its working function and types. You cannot just pick any random generator. A generator has various specifications, starting from the current output to load limit, and so on.

There are also certain external conditions that might influence your choice of generator. That’s why here we have mentioned a few aspects that you need to keep in mind while choosing the perfect generator for your home or office. 

  • Generator Size: This is a crucial factor before buying any generator. To buy the right size generator, first, you need to determine the size and needs of your home or office. Also, calculate how frequently do electricity cuts occur and how long do they stay on an average. All these factors are important in finding the right size generator for your property. Your generator should be able to supply full power to home or office space, equipment, and appliances efficiently. 
  • Power Output: The power capacity of the Genset is measured in kilo or megawatts. To determine how much power capacity of the generator you need, find out the number of electrical equipment or appliances that you are about to use on the generator electric supply. This will give you an idea of how much power capacity of Genset you need. 
  • Noise Produced: No matter what’s the size and power capacity of a generator, it is going to produce noise. But there is differentiation in this factor also. For instance, portable generators produce more noise than stationary ones. So, you can buy accordingly. If you are going to place Genset away from your place outdoors then you don’t need to spend extra money on buying quite Genset. 
  • Fuel Efficiency: This is the amount of fuel needed to produce the maximum power output of the generator. For example, if it is meant to produce 100 KW electric power, the total fuel volume that will be consumed to generate the power is fuel efficiency. Mostly diesel generators are fuel-efficient and give benefits in the long run. 


Diesel generators are indeed costlier than other types, but its variety of features and benefits over others makes it stand out among other types of generators. That’s why you need to be very cautious when you are choosing a generator. Determine your needs first, and then finalize the one for your property.

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