Diesel generators for construction sites and industrial applications

Determining the correct capacity of the generator you will need on your construction site is not as simple as it seems. When you spend money to rent or buy a generator and then find that the capacity is insufficient, you will be disappointed. Below you will learn how to avoid such costly mistakes.

Emergency generators come in various capacities: 5KW-50KW and more. Your choice will depend on the required wattage.

Selecting the correct capacity is an important and necessary step in creating a reliable generator system.

One of the most common mistakes made by people who are not used to working with the formulas used to determine generator capacity is selecting a generator with insufficient capacity.

If you calculate the wattage of the generator to be used on a 230-volt network, one of the following two conditions may apply to your site:

Condition #1 - Motor loads not included:
In this case, the total wattage of appliances and lights can be used to determine the generator's capacity. For example: ten 100-watt lights, a 1200-watt coffee maker, a 1250-watt toaster, and a 1500-watt hairdryer would require a 5kW generator.

Condition #2 - Motor loads included:
When motor loads must be included, the motor's starting wattage must be considered so that the generator can provide sufficient starting current. In general, these devices will require 5 to 6 times the mentioned wattage (exception: the modern E motor with frequency control as in compressors) or the full load current to start. Generally, it is advised to consider a 25% factor for supporting electrical appliances equipped with an induction motor.

In this example, if the data plate of your heating appliance (not an air conditioner) mentions that it is equipped with a blower and the amperage on the plate is 4.5 Amps at 230 volts, then the running motor load of this motor will be 1035 watts. When starting, the generator will need to provide 4000 to 6000 watts or 4-6 kW, just for this motor.

Generally, a generator's capacity is indicated in kVA. To obtain the kVA value, divide the kW value by 0.8 (approximate rule).

If you have trouble selecting the right generator, we are happy to help you free of charge: +32 56 61 67 01. You can also send us an email if you want: sales@machineryresale.be.

First, determine the total power of all connected machines in kVA. Choose a generator with 10-20% more power than the peak load to avoid overloading. Our specialists will advise you and help you select a customized solution. Read more in advance in our blog article: read more.

Our diesel generators provide reliable power for heavy machinery, lighting systems and mobile workstations. They are robust, resistant to harsh conditions and suitable for continuous operation over long days. Ideal for renovation and construction projects. See our mobile diesel generators for options from 10 kVA to 1,450 kVA.

Yes, our hybrid systems combine diesel generators with LiFePO4 batteries. This reduces fuel consumption, noise and CO₂ emissions. For example, a 200 kVA generator paired with a 100 kWh mobile battery provides sustainable yard energy. Check out our mobile energy storage.

Consumption depends on power and load. A 100 kVA generator consumes about 20-25 liters of diesel per hour at 75% load. Our latest models are fuel efficient and have long maintenance intervals. We will help you with exact project calculations.

• Standard generators: maximum capacity at lower cost, higher noise level.
• Quiet generators: noise-reduced, suitable for urban locations or events.
• Fimatec offers both types depending on site needs and environment.

Regular maintenance extends service life and prevents malfunctions. We recommend regular inspection, including oil and filter checks, and testing under load. Fimatec has an in-house service team that quickly performs maintenance and repairs.

a, we have a rental fleet of diesel generators, from small units for renovations to large generators for industrial projects. So you always have an immediate solution during peak periods or maintenance. Take a look at our rental generators for current availability.

Fimatec offers flexible long-term rental of diesel generators from 20 to 1,450 kVA, ideal for construction sites, industrial projects and events. Each generator comes with professional maintenance, inspections and quick replacement in case of breakdowns. Our experts help choose the right capacity, optimize fuel consumption and ensure your project remains continuously operational. Optional hybrid systems can be combined with LiFePO4 batteries for lower fuel costs and reduced noise. Contracts can range from a few months to several years and are fully customizable to your project needs.