Diesel Generator- what to consider before you buy one?

Diesel generators are quite popular for their efficiency to supply backup power. It consists of two primary parts, an alternator, and an engine. Generally, the locations with longer power cuts make use of diesel generators to maintain the power supply in the hour of need.

Even with the development at pace, there are some locations over the world where power cuts bother people, and they need something to cope up with the emergencies that may arise. For such emergency situations, there are numerous diesel generators available in the market worldwide in different sizes, designs, and models varying with the purpose.

Generally, there are three bases to differ: site of the requirement (industrial or residential), input requirement (air-cooled or water-cooled), and the power output. Industrial generators are large in size, provide more power as opposed to the residential generators which are small in size and comparatively generate quite a low amount of power. Air-cooled generators need nothing more than air to cool the internal systems and prevent overheating while the water-cooled generators need a regular supply of water to cool and hence require higher maintenance. There are generators with a power output of as low as 3 kVA while there are even the ones with 200 kVA, and even more. They are used accordingly as per the requirement.

Now, what facts does one consider before they buy a diesel generator? Here are a few that might come in handy:


Diesel generators are of two types in terms of phase; single-phase generator or a three-phase generator. Single-phase generators are generally meant to be used for residential purpose while the three-phased one for industrial use. The reason why households prefer single-phase generators is that they generate a reasonable amount of high voltage power at an efficient cost. Whereas, industries require a huge amount of power supply to keep the heavy machinery working and hence prefer three-phase generators.


There are diesel generators ranging from 2.5 kVA to above 2000kVA which can be used by industries/enterprises/households depending upon the use and power requirements. Households might only need about 5kVA in the times of power cut while the industries will need generators with high power output to support the heavy machinery.

Control systems

As efficient a person/enterprise may need a diesel generator to be, they can buy one easily. There are diesel generators in the market that automatically transfer the power every time there’s a power cut, and some even display the need for fuel or any other change in the system.

Power management systems

If a diesel generator is efficient enough to display a requirement of action, power management systems try to cope up with it. It optimizes the fuel consumption by the generator and ensures an effective performance as per the requirement.

Fuel consumption

If a household requires a generator, they generally opt for the ones that cost less. The main cost of generators adds up in fuel consumption. When a generator is picked up carefully according to its per hour average of consumption, per kVA, and the efficiency that it provides with the given load, they seem to serve the purpose better. For example, if you click here you may find different options that can meet the required power output. Usually, for home utilities, power outputs more than 5kVA are not used.


A home requires dusting all the time, and hence they cannot afford to have one generator placed in a spot forever. This is why they choose portable diesel generators for residential purposes. Whereas, industries or factories might be okay with the ones who never need to be moved and hence would buy a non-portable diesel generator any day. This is how one may decide if they need a portable generator or not.


This is one of the most important factors to be considered while choosing a diesel generator. The area that a generator might cover should be considered precisely for convenience. For residential purposes as an example, there can not be a huge generator while industries can cope with them easily. Also, the size usually varies with the power and load too.


Where does the generator need to be placed? Is it in the house? Is it in a factory? It matters a lot as the noise can be cacophonous and even harm the people in close proximity sometimes. Hence, if a generator is supposed to be placed at home, it should be taken care of to not produce much noise while it might not be a problem in a factory where machines do make noises all the time.

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