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ИAn inverter generator is the best solution for people who are looking for a permanent or backup power source. The device is capable of generating high quality electricity with subsequent conversion to a stable voltage without significant jumps.
Such models are called “digital”, because they implement new technologies and electronic control circuits are available.
The device and principle of operation of the inverter generator
Structurally, inverter generators consist of the following components:
- ICE.
- A generator designed to generate voltage.
- An inverter unit that converts alternating current into direct current.
- Pure sine wave DC/AC converter.
- Terminals for connecting circuits at the output.
- Control block.
- Control device for technological cycles.
- Fuel tank.
- Starter.
The principle of operation of inverter generators is based on current conversion.
It works in the following way:
- Turning on the device. The generator produces an alternating high-frequency current.
- The rectifier converts the voltage to DC. At the same time, the electrical oscillations are stabilized with the help of a filter unit.
- The transformation of the current converter from DC to AC with an almost perfect sinusoid.
- Smoothing voltage indicators by the control unit and making changes (if necessary).
- Supply voltage to the outlet.
The difference between inverter generators and conventional generators
During operation, simple generators produce electricity that is not suitable for ultra-precise devices.
In addition, to maintain the speed, the engine is forced to consume additional fuel, which increases consumption. The quality of the current is also affected by the load and fuel, so the voltage is not ideal.
With the help of a converter, the alternating current is converted to direct current, and then the regulator equalizes the parameters. After conversion, the current of the inverter generator deviates from the ideal value by no more than 2.5%
The voltage control at the output is regulated by the “feedback” chains, which ensures its high quality. The mentioned connection guarantees control of the engine speed, and a conventional generator is connected directly to the engine.
Pros and cons of inverter generators
Before buying inverter generators, it is important to understand their strengths and weaknesses.
- Small fuel consumption. The operation of the device involves automation, which controls the required amount of energy. As a result, the generator consumes the declared amount of fuel and lasts longer. For comparison, an inverter generator consumes 75% less fuel than a simple device.
- Pure sine wave. With the increasing popularity and complication of electrical appliances, there is a need to obtain a better current. Printers, smartphones, PCs, security systems, gas boilers, refrigerators and other equipment are demanding on current. A small difference is enough for the electronics to burn out.
- Small size and weight. The use of microprocessors helps to reduce the size of inverter generators. They are two to three times smaller than simple models. Inverter models also have a smaller weight, which simplifies the process of transportation and storage. Some devices can be carried by hand, because they look like a small suitcase. For comparison, a conventional 2-kilowatt generator weighs 40 kg, and an inverter model with the same power weighs 22 kg.
- Low noise level. Inverter generators have a shroud that reduces the volume by up to 66 dB. During operation, the device quietly “rumbles”. This feature allows you to use the device even in an apartment, without worrying about possible scandals with neighbors.
- Resistance to external influences. Inverter generators are protected to allow the equipment to be used outdoors. The device is not afraid of rain, snow and other negative factors.
- Large set of additional options. Modern models have an economy mode to optimize speed, an oil level sensor to shut off when the level drops, and internal protection. Many inverter generators are equipped with a digital display that allows you to control the output parameters: frequency, voltage, hours of operation and speed parameters.
- Small selection of models on the market. Despite their popularity, the number of inverter devices is limited. The most demanded generators are from Hyundai and Honda.
- High price. The use of expensive electronics affects the final price of the equipment. You will have to pay 2-2.5 times more for an inverter generator than for a conventional one. But it is worth considering that such equipment allows you to take care of the equipment and makes it possible to save on the purchase of a new refrigerator, boiler or expensive dental apparatus.
- Limited power. Inverter generators rarely have a power of more than 8 kW. This is enough even for a large residential building with an electric pump and a large number of appliances. If the device is needed to power household appliances, a 2-3 kW model is enough.
- A complex system. Models with an inverter have many electronic components, which complicates the maintenance process, and also increases the risk of equipment failure.
Classification
For convenience, inverter generators are classified by control options, power and structure. Let’s consider each of the options in more detail.
According to the method of management are divided into four types:
- Remote. They are controlled using a special remote control, which allows you to turn the device on and off from another room.
- With manual start. They start by pulling on the cable. Unlike conventional generators, starting is faster even in cold weather conditions.
- Electric start. More expensive models have an electric starter. Starting is done with the ignition key, which is especially important at low temperatures.
- With the possible installation of ATS. Some manufacturers provide for the installation of an automatic transfer switch. The ATC unit can be bought separately and installed by yourself, taking into account the instructions. The main condition is that an electric starter is provided on the generator.
By power there are:
- Compact. Such models have a power of 1 to 3 kW and a weight of 8 kg. They are small in size and can be easily carried from place to place.
- Medium. They have power up to 6 kW and weight up to 100 kg. Externally they look like monoblocks. Structurally, they consist of a frame with convenient wheels for rolling.
- Heavy. Models with power up to 9 kW, weighing more than 100 kg. Are applied to professional application when it is necessary to feed many consumers.
Structurally, inverter generators can have two types of housing:
- Open. Manufacturers of such equipment have provided many open devices that are mounted on a frame. This option, as a rule, is designed for operation in difficult conditions and with heavy loads at the risk of overheating.
- Closed. Most of the models are produced in a special casing that absorbs noise and vibrations. Also, its functions include protection from negative environmental factors, for example, ingress of dust, water and pollution. Such models can be applied under any conditions.
See also:
Where is the best place to use
There are several areas where the use of inverter generators will be the most optimal.
Powering modern electronics and equipment in homes
Such devices have a low noise level and will not disturb residents of neighboring apartments. Anyone can enter YouTube and explore the features of using an inverter generator in an apartment in a multi-storey building.
The amount of harmful emissions during the operation of such equipment is minimal, because the device is economical and has a high efficiency.
coffee stalls
Inverter generators are actively used to power coffee machines, which are in demand in many cities with a shortage of electricity.
Also, such equipment can be used at various field sites where it is not possible to connect to a 220 V network.
Medicine
The presence of a “pure sine wave” allows the use of inverter generators to power high-precision medical equipment. The devices are actively used in special laboratories, clinics and other institutions.
Tourism and hobbies
Inverter devices are useful during the holidays when leaving the territory of settlements. They are actively used by fishermen, hunters and tourists.
The reason for the high demand is the reliability and compactness of such equipment. It can be taken along with a sleeping bag, tent and other equipment.
Other applications
Inverter generators are in demand at enterprises with precise digital equipment that is sensitive to voltage drops.
Many company representatives install such models even in offices and other premises with people. This is due to the minimum emissions of gases.
This option is possible for a short period of time and subject to ventilation of the room.
FAQ
There is not much information about inverter generators yet, so people are facing questions regarding the application of equipment. Below are the main questions and answers to them.
Can a gas boiler be connected?
Can a refrigerator be connected?
This is possible if we are talking about a modern model. Older refrigerators have compressors that cause a dangerous surge of current when starting up.
Is it possible to connect welding inverters?
In most cases, connecting welding machines to an inverter generator is not recommended.
The reason is that when the arc is ignited, a sharp increase in current occurs, which negatively affects the electronics of the generator itself and can damage it.
The first time the connection and application can be successful, but eventually the device will break. In this case, going to the service center is useless, because this is not a warranty case.
What kind of oil is used in inverter generators?
In such equipment, 4-stroke gasoline engines are installed. They are the same as on other generators, so the oil will be identical.
TOP 5 best inverter generators on the market
With the growing demand for inverter generators, the number of manufacturers that offer such products is also increasing.
Below are five of the best models that rank highly due to quality and a large number of positive reviews.
5. Huter DY6500LXW, (5500W)
Autonomous power source, can be used for welding current up to 200 A. Has comfortable handles for transportation. Starts with built-in starter.
The device has forced cooling, small size and solid metal construction.
- type – gasoline;
- generator type – synchronous;
- nominal / maximum power – 5/5.5 kW;
- engine – Hunter 188F, 15 hp With;
- number of cylinders / cycles -1/4;
- start – manual and electric;
- functions – overload protection;
- type of gasoline – AI-92;
- noise level – 71 dB;
- dimensions – 70x57x53,5 cm;
- weight – 72 kg;
- fuel consumption – 370 g / kWh.
- service life / warranty – 10 / 12 years.
- Reliability.
- The optimum ratio of price and quality.
- Ease of launch.
- Good equipment.
- Convenience of transportation.
- Possibility of use as an independent power source.
- Great weight.
- Weak battery.
- The battery is not included in the package, you need to select according to the size.
- Not a very good starter.
Huter DY6500LXW, (5500 W) is a reliable and time-tested inverter generator. From the first days it becomes the best assistant in the house or apartment. Deservedly ranked fifth in the ranking.
4. PATRIOT GP 3000i, (3500 Вт)
A device designed to power small power devices. Provides a 50Hz 220V pure sine wave output. It can be used to power any modern devices.
The presence of the ECO mode contributes to fuel economy and increases the life of the engine.
- type – gasoline;
- generator type – asynchronous;
- nominal / maximum power – 3/3.5 kW;
- engine – Patriot 5.7 HP, 149 cm3;
- number of cylinders / cycles – 1/4;
- start – manual;
- functions – overload protection;
- type of gasoline – AI-92;
- fuel tank size – 5.7 l;
- noise level – 63 dB;
- dimensions – 27x47x56 cm;
- weight – 30 kg;
- service life / warranty – 5 / 1 year.
- Stable work.
- Economical.
- Reliability.
- High quality plastic.
- Light weight.
- ECO mode.
- Ease of launch.
- Low noise.
- Difficult to fill with oil.
- High price.
PATRIOT GP 3000i, (3500 W) – the best option for home and garden, has a modern look. Fairly quiet and easy to use. The device is in fourth place in the ranking.
3. Denzel GT-3500iF
Inverter generator with small size and economical motor. Works up to 4.5 hours without refueling and produces up to 3,5 kW. It has built-in protection against overload, short circuit and low oil level.
Covers on sockets protect from moisture and dust. The motor has increased reliability, thanks to a cast-iron sleeve, a camshaft / crankshaft made of steel, an improved piston design.
- type – gasoline;
- generator type – synchronous;
- nominal / maximum power – 3.2/3.5 kW;
- motor – 212 cm3, 7 liters. With;
- number of cylinders / cycles – 1/4;
- start – manual;
- functions – protection against overload, low oil level and short circuit;
- type of gasoline – AI-92;
- fuel tank size – 5 l;
- noise level – 97 dB;
- dimensions – 50,2x35x49,5 cm;
- weight – 27 kg;
- service life / warranty – 10 / 1 year;
- manufacturer China, the birthplace of the brand Germany.
- Low price and weight.
- Compactness.
- Reliability.
- Ease of operation.
- High-quality assembly.
- Oil filling control.
- Stable work.
- The time of continuous operation on one gas station is 4-5 hours, depending on the load.
- Louder than competitors.
- Small fuel tank size.
- Not suitable for welding.
- High noise level.
Denzel GT-3500iF is a comparatively small and quite powerful inverter generator. It has good functionality, a reliable motor and an affordable price. Deservedly ranked third in the ranking.
2. Zongshen BQH 4000
Inverter generator, focused on powering low-power devices. Has a small size. Starts with manual starter.
The socket outlets are provided with covers that protect against moisture and dust. It is possible to connect two or more inverters in parallel to increase power.
A control panel and a screen are provided to control the parameters.
- type – gasoline;
- generator type – synchronous;
- nominal / maximum power – 3.5/3.8 kW;
- motor – Zogshen, NH 225, 224 cm3;
- number of cylinders / cycles – 1/4;
- start – manual;
- functions – 12 V output;
- type of gasoline – AI-92;
- fuel tank size – 7,8 l;
- noise level – 65 dB;
- dimensions – 61x56x32 cm;
- weight – 34.5 kg;
- Manufacturer China;
- service life / warranty – 2 / 2 years.
- Low noise.
- Ease of launch.
- Ability to work on a well.
- High quality, as for Chinese technology.
- Stable voltage.
- Pure sine wave output.
- The manufacturer, despite the fact that he is Chinese, is one of the best in the world market.
- Not all nuts can be tightened.
- Hours are missing.
Zongshen BQH 4000 – the best solution for home and garden The device easily copes with the tasks, just starts up, withstands easy start-up and pump operation. It is in second place in the ranking.
1. Honda EU30is, (3000W)
Versatile model for small retail outlets, caravans, campsites and more. Runs on clean gasoline, delivers high quality current.
The battery life on one gas station in ECO mode reaches 20 hours. For transportation, convenient handles are used, there are wheels.
- type – gasoline;
- generator type – synchronous;
- nominal / maximum power – 2.8/3 kW;
- engine – Honda GX200, 196 cm3;
- number of cylinders / cycles – 1/4;
- start – manual, electric;
- functions – overload protection, 12 V output;
- type of gasoline – AI-92;
- fuel tank size – 13,3 l;
- noise level – 90 dB;
- dimensions – 65,5x57x48 cm;
- weight – 61 kg;
- air filter number – 17211-ZS9-A02;
- service life / warranty – 2 / 2 years.
- Electric and manual start available.
- The battery is inside the case.
- Versatility of application.
- Net voltage output.
- Modern engine.
- Japanese quality.
- Small noise level.
- Economical.
- Availability of spare parts from an authorized dealer.
- High price.
- Great weight.
Honda EU30is, (3000 W) is the best solution in terms of price and quality. The inverter generator is easy to operate, reliable and able to cope with tasks of varying degrees of complexity. The device is in first place in the rating.
An inverter generator is the best choice for consumers who are sensitive to current quality. With it, you can power a modern refrigerator, TV, boiler and other equipment.
It is designed for continuous operation and is able to withstand high peak loads. It can be used as a main or backup power source.
It is worth considering that not all models are capable of producing a pure sine wave and support the welding function, so these points need to be clarified separately.