Are you planning to buy a professional generator, but you don't know which model to choose? Check out the subjective ranking of generators, prepared by Onninen specialists. You will learn what criteria to follow when buying a device and you will learn about the most popular power generators chosen by our wholesale customers in 2025. We invite you!
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What to consider when choosing a power generator?
Generators are devices that are independent sources of electrical energy. They are used to generate electricity for various needs. They are used in places where there is no access to the electrical grid. They ensure the continuity of operation of electrical devices in the event of a power failure. There are two basic types of generators: portable and stationary.
The power generator should be adapted in terms of technical parameters and functional features to the individual needs of the customer. First of all, it is necessary to determine what equipment or installations will be powered by the power generator and to establish requirements for the frequency of transport. The key parameters and functions of the device are:
- rated power,
- supply voltage,
- automatic voltage stabilization (AVR),
- automatic switching (ATS),
- fuel tank capacity (a large fuel tank eliminates the need for frequent refueling).
Ranking TOP 5 power generators
Place No. 5 - Scheppach SG2600 generator
In 5th place in our ranking was a generator from the renowned German brand Scheppach – model SG2600, equipped with an AVR voltage regulator, a 4-stroke engine and a large tank with a capacity of 15 liters. The generator has an output power of 2200W and a nominal power of 2000W.
Place No. 4 - Scheppach ISE2500 inverter generator
The 4th place is also occupied by a generator (inverter generator) from Scheppach – the ISE2500 model powered by a 4-stroke petrol engine with a capacity of 79 cm3. It offers a maximum power of 2000 W. It has 2 AC sockets and a 12-volt DC output for charging the battery. It is ideal for the garden, on the plot or on the construction site. The lightweight and compact design ensures mobility and versatility of applications. The generator works quietly. It is suitable for powering many electrical devices, including sensitive ones.
Place No. 3 - Scheppach SG3200 generator
The 3rd place goes to the 1-phase Scheppach generator – the SG3200 model with a power of 2800W, equipped with a 4-stroke 6.5 PS petrol engine with a recoil starter and air cooling system, as well as a solid steel frame, AVR voltage regulator, 2 independent 230V and one 12V sockets, an integrated overload fuse and a 15-litre tank, which reduces the need for frequent refuelling. The rated power of the generator is 2500W. This is a reliable and economical solution, ideal for places without access to permanent power supply, such as a campsite or construction site. 
Place No. 2 - Scheppach SG3100 generator
Place number 2 is again a Scheppach generator. The SG3100 model offers an AVR voltage regulator, a 4-stroke engine, an output power of 2700W and a nominal power of 2500W. It has a capacious, 15-liter fuel tank.
Place No. 1 - Scheppach SG7100 generator
The top 2025 generator is the SG7100 Scheppach model, equipped with a 4-stroke 420 cm3 engine, AVR voltage regulator and advanced security systems. It offers a maximum power of 5500 W, which is fully sufficient for most work around the house or on the construction site. A stable, steel frame, transport wheels and foldable handles ensure mobility and versatility. The generator has a very large, 25-liter petrol tank, which guarantees approx. 10 hours of uninterrupted operation. Users have access to 230V / 400V / 12V sockets, which allows for powering a wide range of machines and tools.
If you have any questions or concerns, please contact us. We will help you choose a power generator that will provide the right amount of energy in specific conditions.
Check out the offer of portable generators at the Onninen wholesaler