Generators

The VARI brand offers a complete range of gasoline generators with outputs from 2000 W to 8500 W, designed for both home and professional use. You will find frame generators with AVR voltage regulation as well as encased or suitcase inverters. Not sure which one to choose? We have a comparison for you to help you understand the differences between AVR and inverter generators.

AVR generators

AVR generators are equipped with an AVR (Automatic Voltage Regulator) unit that monitors and balances the output voltage. The purpose of the AVR system is to keep the output voltage constant, which is necessary for the stability of electrical equipment connected to the generator. AVR generators have a wide range of uses; they can be used as a stable power source in households, cottages, gardens, mobile service centers, during installations, and on construction sites. They are not entirely suitable for a large number of appliances with sensitive electronics, such as televisions or computers.

Principle of operation: A gasoline generator produces AC power directly in the alternator. The AVR system electronically regulates the output voltage so that it does not fluctuate when loaded. The output is a sinusoidal current, but it is not completely pure. Both voltage and frequency may fluctuate slightly (±5%).

Compared to inverter generators, AVR generators have a higher noise level, especially during increased load. These are reliable generators that do not operate at the limits of their capacity even at full operating load, and their technical specifications are always met with room to spare. AVR generators have a high-quality, robust design, which usually includes a handle and a chassis with wheels for easier handling. They have a much larger fuel tank, ensuring a long running time without the need for refueling. Unlike inverters, they always operate at maximum speed, so they have higher consumption.

AVR generators are suitable for powering modern power tools, electric motors, heating equipment, and lighting, and some types are also suitable for welding units. AVR generators can also be used as a backup power source in the event of a power outage.

Inverter generators

Inverter generators are the ideal power source for sensitive electronic devices such as computers, servers, digital systems, etc., providing optimized electrical energy for both reactive appliances and electronic devices. This also ensures maximum performance and long service life of the powered appliances. Inverter generators are mainly manufactured in fully soundproofed, hooded or suitcase designs with minimal noise levels, very low weight, and low fuel consumption.

Principle of operation: The inverter first generates alternating current. This is then rectified to direct current. Subsequently, its special electronics "reassemble" the direct current into a pure alternating sine wave with a precise frequency and stable voltage. The output is thus a very clean, stable current without voltage and frequency fluctuations.

Inverter generators use computers to modulate both the voltage curve and magnitude, as well as frequency stability, regardless of engine revolution, providing exceptionally high-quality electrical current. Inverter technology also allows for the design of exceptionally compact generators with alternators that are almost half the size and weight of similarly powerful conventional generators. They are therefore quieter, more compact, easy to handle, and portable. In addition to their normal use and the aforementioned powering of sensitive and delicate electronics, inverters are also suitable for camping, caravanning, and providing power at various social events, where their quietness ensures that no one is disturbed. Inverters regulate engine rpm according to load, so they consume less power than AVRs.

Another advantage of inverter technology is the possibility of parallel operation, or "phasing" of two identical generators. Using special connection cables for parallel operation, two identical generators can be connected to double the electrical power. This ensures that larger appliances can be powered as needed without having to replace the generator with a larger and heavier one. If necessary, the two generators can be disconnected from each other and used separately. The VARI range offers the possibility of pairing ECV 2000 W models.

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