The diesel generator is a widely used piece of equipment across various sectors, such as large industries, major businesses, hospitals, schools, and many other places that require a reliable power supply.
Among the available types, they can also vary in size and power, the latter directly impacting their consumption.
The installation and calculation of electrical energy consumption depend on both the power and the care taken over time with its maintenance and the overall condition of the electrical system.
Additionally, the segment that will use the generator and the analysis of the necessary demand are important points in the consumption calculation when evaluating generator rental.
Want to know more about diesel generators and their average consumption information? Keep following our publication!
DIESEL GENERATOR
Generators are generally excellent options for power generation from some fuel that can be either fossil or renewable.
With technological advancements, the combustion of fossil fuels has become increasingly efficient, having much less environmental impact, especially concerning the consumption of each piece of equipment.
The diesel generator can supply electrical energy from this fuel’s combustion and is considered one of the most robust models available.
One of the important points is that it offers greater work strength and can avoid wear over the years, making it a more durable and resilient option.

HOW A DIESEL GENERATOR WORKS
It basically operates with a diesel engine to convert fuel combustion into mechanical movement, which is then transformed into electrical energy.
As an engine, it involves the same air suction until it is fully compressed.
Then diesel is injected, ignited, combusts, and performs the movement.
This equipment’s main advantage is its ease of application across various sectors.
Being a readily accessible fuel, this type of energy can be applied anywhere, from urban centers to the most remote regions of Brazil.
In very remote regions, it is common to install large external tanks to increase the plant’s autonomy and extend the interval between refuels.
Diesel generator sets also have a good response to sudden loads compared to other types of fuels.
MAINTENANCE AND DIESEL QUALITY
The maintenance of this type of generator is also important, even if it can occur over a longer period.
One point of attention is the water that can accumulate in the fuel tank.
It must be removed to prevent contact with the machine’s engine and potential breakdowns.
Another focus is the quality of the diesel used for power generation, which should be as high as possible.
Low-quality fuel can lead to dirt in the tanks, which can be carried to the engine, impacting potential failures and equipment breakdowns.
AND HOW MUCH DOES A DIESEL GENERATOR CONSUME?
There are diesel generator sets with low specific fuel consumption and high electrical power generation performance compared to outdated technology models.
This consumption also depends on the different power ranges among generators and even the time they can work continuously.
An example of calculation through its generated power can be performed, such as:
A model with 180 kVA nominal power; Its consumption will be approximately 27 liters of diesel per hour.
With a 300-liter fuel tank, its autonomy is about 12 hours of continuous operation.
Other power types have different calculations and quantities of liters per hour of work, and it is important to have this data or consult the equipment manufacturer.
OTHER INFORMATION ABOUT DIESEL GENERATOR CONSUMPTION
A good analogy for diesel generator consumption is with a car.
A car with a 1.0 power consumes less fuel than one with 1.4 or even 2.0 power, but consequently has lower power – it will provide less energy overall.
Power is directly linked to the type of use the equipment will have.
A generator for an industry will require more power than a generator used in a small business or residence.
There are some average values that can vary even according to the voltage of each piece of equipment.
Adding other powers to our study of generator sets (GMG):
- GMG 25 kVA consumes an average of 4 liters per hour
- GMG 45 kVA consumes an average of 7 liters per hour
- GMG 100 kVA consumes an average of 15 liters per hour
- GMG 180 kVA consumes an average of 27 liters per hour
- GMG 260 kVA consumes an average of 39 liters per hour
- GMG 550 kVA consumes an average of 82 liters per hour
- GMG 700 kVA consumes an average of 104 liters per hour
- GMG 1100 kVA consumes an average of 163 liters per hour
- GMG 1500 kVA consumes an average of 223 liters per hour
Of course, these values still vary according to usage, the generator’s installation location, the quality and frequency of its maintenance, and even the quality of the fuel used.
LEARN MORE!
Calculating consumption and understanding which diesel generator is best for your scenario can be a challenging task that falls outside your main scope.
That’s why it’s important to rely on a trusted partner who understands your reality and provides the best option according to your needs.
Tecnogera has extensive experience in offering the best option for generator rental for your business.
Contact one of our specialists.




