Autonomous electricity for a private house, cottage, summer residence

Increasingly, in today's very volatile conditions, there are questions that such autonomous electricity for a private house, villa or how to solve the problem of the uninterrupted supply of electricity to our home. There are two ways. The first is to connect to already existing electrical networks. The second - to buy an electric generator - an independent source of electricity.


But even if you think that there is not yet a need for a personal small power plant, then still it will not be superfluous to be portable power generator in the event of a power outage, and from the occurrence of contingencies, no one is immune.

Modern life is impossible without electricity. His absence disrupts the rhythm, routine of our life, and malfunctions can even become a threat to life, health of tenants at home. Of course, professionals must solve the problems of power supply. Nevertheless, there are things that every owner of a house, cottage, country house should know.

Connection to the power grid, unfortunately, does not guarantee a smooth and high-quality power supply. Many homeowners, striving for energy independence, acquire their own backup source of electricity - generator sets, or mini-power plants. If there is no electricity or there are intermittent power outages, then, alas, some of the benefits of civilization (light, heat, hot water) become unavailable. In these conditions, the autonomous electricity for the house, obtained from the power generator, undoubtedly becomes a means for survival.

The range of power generators includes both compact portable devices weighing up to 12 kg for solving local problems, and powerful units capable of completely supplying electricity to the house, to which centralized electricity supply is not provided.


Often the generator is purchased already during construction, when the construction site has not yet been provided with a permanent power supply line.

Autonomous generators generate electricity with a voltage of 220 or 380 V with a frequency of 50 Hz. The main elements of the generator are the internal combustion engine and the generator itself, which converts mechanical energy into electrical energy. Internal combustion engines used in generators can be diesel, gasoline, and also those that run on liquefied gas.

Autonomous generators of low power consume from 1 to 4 liters of fuel per hour.

In the most simple stand-alone generators, all components (the motor together with the generator, the fuel tank, the starting device, etc.) are mounted on a frame made of steel pipes. To reduce noise, most devices have mufflers. And the more complex ones are mounted in a metal casing with a noise-damping layer.

Stand-alone generators can be equipped with oil level and pressure sensors, as well as thermal protection, which stops the engine in case of danger of overheating.

There are autonomous generators that are designed for continuous continuous operation, and there are such, which after several hours of operation (from 4 to 8 hours) should be turned off for a half-hour break.

By the method of connection, the autonomous generators can be divided into two types:

  • mobile;
  • connected with the electrical network.

Mobile autonomous generators.Power - from 1 to 10 kV • A. For comparison, the maximum power consumption for a private house is about 10 kW, and with electric kitchen equipment - about 15 kW. The engine is usually gasoline. For ease of movement, the metal frame on which the generator is mounted is equipped with wheels.

For such a generator to start producing electricity, it is necessary to start the engine.


The engine can be started manually or with an electric starter. Some models have a combined version of the launch, that is, they can be started manually and using an electric starter.

Generators with an electric starter are equipped with a battery.

Sockets are used to connect electrical cables to the frame or in the generator housing. This can be either only single-phase sockets, or exclusively three-phase, or both.

Sometimes autonomous generators are additionally equipped with a voltage regulator.

Autonomous generators associated with the internal power network.For private and country houses, aggregates with a capacity of 7 to 30 kVA are usually used. The engine is most often diesel. These generators are usually installed indoors. It must be dry and have a chimney, through which exhaust gases will be emitted. It is desirable that the room had good sound insulation, since the engine operation is accompanied by noise.


Such generators are equipped with automatic control, starting and stopping the engine. In the event of a power failure, the automation starts the motor and connects the voltage generated by the generator to the indoor electrical network.

The delay time for starting the engine (response to a lack of voltage) can be adjusted from a few seconds to several tens of seconds. This is necessary to prevent the engine from starting during short-time power failures in the network.


When the power supply resumes, the automation checks the voltage stability for several minutes. If it is stable, the generator turns off from the in-house electrical system, the engine stops and goes into standby mode.

The market offers a wide range of autonomous generators with a capacity from 1 to 2000 kVA. Manufacturers usually indicate the power of generators in kilovoltamperes (kVA).

For generators that produce single-phase voltage, the power indicated in kVA is equal to the power in kW. To calculate the power of a generator producing a three-phase voltage (in kW), the value specified in kVA should be multiplied by a factor,.

In order to make it easier for you to navigate, what power generator is needed to provide autonomous electricity your house, cottage or cottage, give below an approximate list of power-consuming equipment, its approximate power

Electricity Consumers Power consumption, kW Number, pcs. Total power, kW
Light bulbs (lighting) , 15 ,
Sockets for portable electric power consumers , 10 ,
Sump pump , 1 ,
Electric stove , 1 ,
Washer , 1 ,
Fridge , 1 ,
Freezer , 1 ,
Lawn Mower , 1 ,
Street Light Bulbs , 3 ,
Total 1,
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