Gasoline generators 5 kW: which is better, prices, types, reviews of models

The difference between gasoline generators by engine type

For the operation of gas generators, internal combustion engines are used. They are of two types:

• two-stroke;
• four-stroke.

The two-stroke engine is used in petrol generators with low power (maximum 5 kW). Such a motor starts easily, even at very low temperatures. It is not whimsical to maintain and consumes less fuel than other models.

A four-stroke motor is used for instruments with operating times of five hours or more. It has high power and works without the use of special oil mixtures. The power of the motor greatly complicates its start at negative temperatures, and in some cases it becomes completely impossible.

Gasoline generator engines can be made of different materials, have a different number of cylinders and valve arrangement. Aluminum cylinders have low stability and can work for a short time. These cylinders are used in generators intended for tourism, outdoor recreation, hunting or fishing. The main emphasis in the creation of these generators falls on the provision of mobility, lightness and compactness of the product.

Cast iron engines have lateral valves and are heavy enough. Due to their high power, they are able to provide electricity to a small country house. Such generators are expensive and are used as an additional source of energy in case of interruptions in the central grid, for seasonal needs in the country, in field work and in road construction.

Gas generators with the highest power and performance have a four-stroke engine and cast iron-based cylinders. The valves are located in the upper half of the unit. The generator's service life is more than 3000 hours and is comparable to the operation of a diesel station. Such models cost a lot of money and are used to supply power to summer cottages and cottages both in the summer and throughout the year.

Which 3 kW petrol generator is better to choose?

All presented models are decent enough

When choosing a generator, it is important to take into account the specific purposes of its use.

Especially the DENZEL GT-3500i gasoline generator has earned a lot of positive feedback. It attracts reliability, durability, high build quality, as well as a very reasonable price. In addition, the design provides an hour meter, and it is much more convenient to work with it.

The optimal solution for regular welding work is the Ayerbe AY 200 H DC. It is specially focused on working with power tools, with welding machines. Useful information about gas generators 3 kW

For repairs, the generator will be a real godsend.

There are also quite a few users who are looking for the best solution at an affordable price, but certainly with an electric start from a key. And there is such an option: Moller MR / GGT 4000E. The optimal ratio of quality and price, decent functionality.

Choose the most suitable generator for your job.

Power calculation

Power is the main characteristic that is taken into account when buying a power plant. To determine the required value of this value, add up the power of the devices that will be powered from it, while it should be 20-30% higher than the calculated indicator. This is because the generator will only operate optimally if the connected load does not exceed 40-80% of the nominal.

If the power is incorrectly calculated, the following negative moments are likely to occur:

1. Overloading the engine causing it to stop.
2. Reduction of the operating life of the power plant due to operation at limiting conditions.
3. Excessive consumption of fuel.

To calculate the power you will need:

1. Determine the types of devices that are planned to be used from the generator.
2. Find out the power of the devices.
3. Find out for devices coeff. starting currents.
4. Using the data obtained, calculate the required power of the power plant.

For example, the following electrical appliances consume approximately the same power (kWh):

Also in the calculations, the coefficient of inrush currents is used, which for various devices has the following values:

For example, if you plan to use an apparatus for welding, you need to select a power plant that is capable of supplying a current three times its rated power. This happens at start-up, and further work will be carried out in standard mode.

An example of calculating power: a generator is needed for a house or a summer cottage, since there are interruptions in light for 1-2 days. At this time, the refrigerator, lighting in the rooms, video surveillance, TV and a vacuum cleaner will be turned on. The total power of the devices will not exceed 2 kW. According to the above tables of powers and starting currents, you can calculate the parameters of the generator, designed for the simultaneous connection of all consumers.

For the calculation, take the largest values ​​(kW): lamps (0.05 * 2 + 0.1 * 3) * 1 + refrigerator 0.3 * 5.0 + vacuum cleaner 0.8 * 2.0 + TV 0.08 * 1 , 0. It turns out a little over 3.5 kW. Considering the fact that the total power of all devices will be much lower than the calculated value, and all consumers are unlikely to be involved at the same time, a generator with a capacity of 3 kW will be quite enough.

Many firms indicate its maximum power on the product. Before choosing a gas generator and buying it, you need to remember that it is not designed for long-term operation in this mode. In fact, the rated power is lower than indicated.

Gas generator DDE DPG6501E-ATS

This unit with a 420 cm³ engine is made on the basis of a synchronous generator and a four-stroke engine. This device consumes 2.8 l / h, and at the same time delivers energy up to 6.5 kW.

DDE DPG6501E-ATS Advantages

• This gasoline generator has an autostart, which monitors the voltage in the network, and when it is not enough, it starts the engine.
• You can choose to start in manual or automatic mode.
• This design already has a platform on wheels, which makes the generator more mobile with a weight of 92 kg.

Disadvantages of DDE DPG6501E-ATS

• When the device is not used for a long time, the battery is discharged, which powers the electrical system and monitors the voltage in the network to start the engine.
• If this structure has a wheelbase, it will not work to move it over long distances. To do this, you will have to use a trailer or transport, where you can load it for transportation.
• This device is not so easy to connect, so you have to call a specialist.

Other criteria

An important point in the generator is its belonging to the synchronous and asynchronous type. Synchronous is quite complicated: for example, it has inductors on the rotor. An asynchronous type apparatus has a different structure: its rotor is similar to a regular flywheel and is completely closed, which is why it is less susceptible to moisture and dirt. The main differences between this type of generators are as follows:

1. Asynchronous ones are simpler and react more easily to short circuits. Therefore, they are used to work with a welding machine.
2. Both types of generators have different properties: on devices of the synchronous type, the starting voltage does not have a significant effect, and they also deliver "clean" current better.

In addition to other factors, the voltage stability is influenced by the class of the engine - its ability to maintain constant speed (about 3 thousand) during load drops, as well as the voltage regulation system in the form of an automatic regulator (AVR). Models of generators without brushes serve more efficiently, and do not require special maintenance, which is confirmed by the reviews of people who use them for a long time.

Criteria for working conditions

When using an electric generator at home or in the country, any device with a power that corresponds to the estimated consumed load is suitable for powering ordinary household appliances. The possibility of using them when connecting special tools and a welding machine would help to solve many additional tasks. To do this, power generators must meet certain characteristics:

1. Current strength, indicated in amperes. With a higher characteristic that the unit is capable of producing, an electrode of a larger diameter can be used. For example, at a current of 200 A, you can use a 4 mm electrode, which is quite enough for welding at home or for the needs of a summer cottage. For industrial needs, it is better to use a more powerful device that produces more than 400 A.
2. By the type of current - units with alternating current - the most demanded option due to the low price. The weak side of the device is the rather low quality of the weld seam. Constant voltage models have a rectifier that allows the arc to burn smoothly, but this increases their cost.

If you need to power a computer, a video surveillance system, or low-power electrical appliances, it is better to buy a small inverter generator. But before that, you need to find out how closely its output voltage waveform follows a sinusoid. Such generators are light, small-sized, and have a low noise level, moreover, they are able to adjust the engine speed based on the load, which significantly affects fuel consumption.

So, a household inverter generator operates at minimum load more than 70% of the time, dropping the frequency to 1000-1200 rpm. The main disadvantage of such units is lower reliability. Also, its electronic circuits may not withstand the inrush current of the motors of a water pump or other device having similar characteristics.

Photos of the best gasoline generators

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Varieties

The problem of power outage is now solved simply - by the presence of an electric generator. Manufacturers produce several types of such products:

1. gasoline
2. gas
3. diesel

The category is determined by the type of fuel to be filled.

Also, the models differ in:

• the size of the produced voltage
• weight
• number of phases
• own dimensions
• Efficiency (economy)

There is a whole range of power plants on the market, and it's easy to get confused by the huge variation.To find the most suitable device for your needs, and to be sure of the choice, you should familiarize yourself with the characteristics and the list of the best models.

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Main selection criteria

To choose a high-quality generator for a garage or home, you need to understand the technical characteristics that such a unit must have.

The first thing to pay attention to is the installation. It must be produced with the involvement of a specialist, otherwise you may face an accident in the power grid.

There are generators on the market, the cost of which starts from a few thousand rubles and reaches several tens of thousands. It is not difficult to guess that the higher the price, the more powerful and reliable the equipment will be.

The volume of the tank guarantees long-term operation. It is better to choose models with a dual-fuel system, it is very convenient.

For domestic use, a single-phase model with a power of up to 4 kW is sufficient. The work of the equipment will be enough for 4 hours. If the equipment is purchased for a construction site or provided with light for a summer residence, then three-phase models with a power of 6-7 kW should be considered. They always have a built-in 4-stroke motor.

If you plan to connect a telephone, household and small construction equipment, you can consider Champion generator models.

To keep your construction equipment running, it's time to take a closer look at Huter units. They are more powerful, reliable and capable of pulling such devices.

There are also budget options on the market, for example, Fubag. The equipment is inexpensive, has decent functionality, but you should not expect great power from it.

When a stationary installation is required that can operate for a long time, then the most important thing is to pay attention to the size of the fuel tank. If the manufacturer includes a useful list of components with his model, then this is undoubtedly a plus.

In the case when the user does not understand the technical features of generators, it is better to contact a store consultant for help. He will accurately select a model for individual needs, he will be able to take into account all the nuances.

For information on how to choose a generator for your home, see the video below.

Generators with a capacity of 3 kW

If a weak generator can be enough to power standard household electrical equipment, then, if necessary, use a powerful tool (heat gun, grinder, perforator), the best generators for giving are those that produce 3 kW of current power.

Gasoline generator DDE GG3300Zi

Single-phase gas generator based on a synchronous alternator. In nominal mode, it delivers a current of 3.2 Amperes and 3.5 at maximum. With a fuel consumption of 1.3 l / h and a tank capacity of 9 liters, it can work without refueling for 7-8 hours (depending on the load).

+ Pros of DDE GG3300Zi

1. The device weighs only 35 kg - even less than some kilowatt models. If necessary, the generator can be moved from place to place alone.
2. The price-quality-performance ratio is one of the best among the devices of similar power.
3. The generated current is outputted through the inverter circuit, which improves its performance.
4. Good build quality - proven multiple times by tightening connections on newly purchased generators.
5. Well tolerates working with welding devices (with correctly selected characteristics).

- Cons of DDE GG3300Zi

1. Noise level - the specification for the generator indicates 91 dB - if possible, it is better to place the device away from the work site.
2. Although the weight of the generator is relatively small, the absence of wheels is a significant disadvantage when using it as a mobile source of electricity. If necessary, you will have to do them yourself.
3. The degree of protection against moisture and dust is IP21 - if it starts to rain, it is better to cover the generator at least.

Gasoline generator Hitachi E 40

Single-phase generator with rated and maximum power of 3.3 and 4 kW, respectively. It is equipped with a Mitsubishi engine with a working volume of 296 cm³, but at the same time the noise level does not exceed the passport 68 dB.

+ Pros of Hitachi E 40

1. Build quality and components - all production lines are located in the homeland of the brand - in Japan.
2. A large power reserve - the nominal value in the passport is 3.3 kW, and at the maximum, all 4 can be hung on the generator.
3. Large fuel tank - 21 liters. This is enough for more than 9 hours of continuous operation (the lower the load, the lower the consumption).
4. The volume of the engine is 296 cm³, due to which its "smooth" operation is achieved - with stable characteristics of the output current.
5. The design is simplified as much as possible - if necessary, minor repairs can be performed independently.
6. Easy engine start - even in frosty weather.

- Cons of Hitachi E 40

1. The quality of the components determines the large weight of the device - 70 kg, in the absence of wheels, at least two people will have to move it.
2. Compared to some analogues, the fuel consumption is quite high - about 2 liters per hour.
3. The price is fully consistent with the quality and premium class of the device - if necessary, you can find a generator with similar characteristics, but cheaper.

Review of popular models

Let's briefly describe the most popular models of HPP production.

HHY3000F

Universal main power supply. Suitable for domestic use, it can be used at construction and industrial sites as a backup power plant. Engine power - 7 HP with. The power of the electrical installation is 2.6 kVA. The unit has two sockets for connecting electrical appliances and branching boxes. Battery life - up to 15 hours.

HHY3010F

The model is almost identical to the previous one. The difference is that the volume of the tank is reduced on it, therefore, the battery life is also reduced (up to 11 hours). The 3010F received a new engine, but its characteristics were at the level of the previous generation.

There are no major operational differences between the models at all.

HHY960A

Compact portable device for household use. Can be taken on hiking trips and long trips. Rated power - 0.85 kVA. The four-liter tank allows the compact generator to run for ten hours without stopping. Declared by the manufacturer as the main source of electricity. Weight - 17 kg.

HY125Si

An inverter-type gas generator with a declared power of 1 kVA. The portable installation can work up to 8 hours without refueling. Used as a backup source of electricity. The unit weighs only 13.5 kg.

HHY3010FE

This is the same model as the 3010F described above. The only difference is that the “E” model is additionally equipped with an electric starter and a set of accessories to facilitate transportation. The main source of electricity.

HHY2500F

One of the most popular models. Used as the main power supply. Focused on household needs. The declared capacity is 2.5 kVA. Autonomous work: 8 hours. The device consumes almost 2 liters of gasoline in 60 minutes of operation. The device has a built-in fuse, there is a voltage stabilization system.

The generator is equipped with a vibration and noise suppression mechanism.

HHY3000FE

Identical to the 3000 model. The additional letter "E" indicates the presence of an electric starter.

HHY7000FE

High-performance main source of electricity with a capacity of 5.5 kVA. For single-phase networks. Starting through an electric starter. The car is heavy - 74 kg.On one tank (22 l), the generator operates without refueling for more than 13 hours.

HY2500L

Open frame generator. Power - 2.5 kVA. Currently out of production. It has a low noise level. It can work autonomously for almost a day - 22 hours. There are 2 standard sockets on board. Unsuitable for use in bad weather.

HHY5000F

A utilitarian model of the main source of electricity. Suitable for both household and household needs. The power for this class of devices is very high - 4.4 kVA. Operating time - 10 hours with a fuel consumption of 2.5 liters per hour.

HY300Si

Heavy inverter device with a capacity of 3 kVA. Backup power supply with a maximum operating time of 5 hours.

Equipped with castors for easy transport.

In general, Hyundai gas generators are highly rated by consumers. The reviews indicate that these are quite productive devices with which most electrical appliances and mechanisms are compatible.

As an important advantage, buyers cite outstanding noise levels. Another positive point is the rich configuration of the generator: there are many additional accessories in the box, the presence of which allows you to maximize the operational potential of the power plant

In this regard, Hyundai gas generators have high user ratings on product aggregators (an average of 4.5 stars on Yandex.Market).

How to choose the right power for an autonomous power plant

In general, the selection of the power of the gas generator is reduced to the arithmetic addition of the number of watts for which all the devices that will be connected to it are designed. This opinion is completely true, but with some reservations, which must be remembered when performing calculations.

What electrical appliances will necessarily work at the same time. If there is, for example, a lathe in the garage, then it is unlikely that it will be used in parallel with the compressor. On the other hand, if there is an electric oven in the kitchen, then a dishwasher or a bread machine may well start up with it.

After calculating the power of all devices, which theoretically can be turned on at the same time, about 30% must be added to the result obtained. This is due to several considerations at once:

• Just in case, which are different.
• So that the generator does not work constantly in the "wear and tear" mode.
• Starting currents are leveled, which are several times higher than the rated values ​​of electric motors (of the same refrigerator).
• Such a margin helps to take into account, in addition to the active, also the reactive power of the generator itself and the devices connected to it, which can be 1.5-2 times higher than the declared ones (this is mainly true for electrical appliances, inside which there is a winding). If the manufacturers indicate the power of the equipment in Volt-Amperes, then the calculations will be somewhat simplified.

As a result, despite the seeming simplicity of calculations, if a gas generator is chosen for the simultaneous operation of numerous electrical appliances (for example, for a workshop), then it is better to seek advice from specialists. An unsuccessfully selected power will entail excessive fuel consumption for an excessively powerful generator, or the need to periodically turn off some electrical appliances.