Solar Inverters

Brief Overview of Famous Inverter Brands

ChintPower Systems Co.,LTD

This type of inverter is quite expensive. Country of origin China. Produces a pure sine wave with reduced noise of about 30 decibels. Power 1000 VA, voltage up to 230 volts. The power of the SB with this converter reaches 1200 watts. The price tag varies within 40,000 rubles.

Cyber ​​Power Inverter

It is considered a budget microinverter for solar panels. Outputs a pure sine signal. Great for low power appliances. Can automatically switch. Output power 200 VA. Output voltage 220 v. Performs a transition to the battery in 4 ms. Its cost is only about 5000 r.

Voltronic power

The device of this company has a built-in charge controller. It also has pure sine. It has a maximum power of 1600 watts. The output voltage is 230 v. The output frequency is 50 hertz. To purchase it, you will have to pay about 20,000 rubles.

To get the maximum output from the entire power plant, it is necessary that each component of the system harmonizes with each other.

MAP "Energy"

This company produces Russian-made converters. It creates inverters with a power of 800 - 1200 watts.

The following converter options come out of its conveyor:

• 3-phase.
• Pure sine inverters.
• Devices that borrowed additional energy from the battery.

Each of these devices is capable of charging the battery. This type is used everywhere for both domestic and industrial needs.

This company has produced a device with a power of up to 20 kW. This is her pride! It holds loads up to 25 kW.

Schneider Electric

This company produces solar inverters with good performance. These devices can be safely used in cloudy weather. The body is coated with anti-corrosion protection, which allows you to resist salt precipitation.

In the manufacture of the French company abandoned electrochemical capacitors. This gave her an advantage in the consumer market.

The efficiency of devices manufactured by this company is 97.5%. Using an inverter from this company, it is quite possible to build a solar power plant for 3-20 kW.

TBS Electronics

The company has been producing converters since 1996. Their devices are suitable for Poversine solar modules with power from 175 to 3500 watts. The metal surface protects it from various harmful factors.Good electronics allow it to work very reliably.

This type of device is protected against short circuits and overloads.

Kostal

Produces converters of various types and capacities. Some appliances have a built-in AC switch. Many devices are already built into this device.

Anyone can use this device. It is easy to install and very convenient to use. The manufacturer gives a 5-year warranty. It is created according to European GOSTs.

Taiwan inverters ABi-Solar

These are autonomous SL / SLP and hybrids. They have built-in controllers for recharging the battery. Taiwanese developers have combined 3 devices in one device: a controller, an inverter and a charger.

The built-in screen will allow you to monitor the incoming data. Efficiency 93%. Some of these devices have protection against various dust.

The ABi-Solar SL 1012 PWM model delivers 800 watts of power. With it, it is easy to make the charging process automatic.

Manufacturer GoodWE

The Chinese manufacturer makes quality devices and sells them for a small price in Russia. With the help of special software, you can make calculations. This will allow you to squeeze the maximum efficiency out of the solar station.

You can control the operation of the installation using a regular mobile phone.

Thus, by installing the desired inverter for solar panels, you can be completely independent of the standard power supply.

Selection criteria

It, along with the geometry of the output signal, is also affected by its power.

Important: When choosing one of the main elements of solar-powered batteries, you need to proceed not only from the optimal geometry of the output signal: you must take into account the power.It is recommended to complete them with converters whose power value is higher than that of the equipment used by the consumer

The stock should be at least 30 percent. It is also necessary to take into account the one-time load that occurs when several devices with high starting power are turned on at the same time.

An important criterion is the efficiency, which characterizes the associated energy losses. It is different for different devices and lies in the range of 85-95%. The optimal value is considered to be 90%.

Benefits of Inverter Batteries

Modern homes are often subject to power surges and power outages. The heating system suffers the most from this, since in most houses water is heated using electricity. The presence of constant electricity affects the smooth operation of the gas boiler. Circulating pump and control automation.

The inverter is designed to transform direct current into alternating current

If the heating boiler stops, it is likely that the pipes through which water passes will break, which will lead to the destruction of finishing materials and the appearance of cracks in the building structure. Inverter batteries have gained wide popularity in recent years and began to displace individual generators. Inverters work thanks to the fact that special batteries supply it with a power source.

Advantages of the inverter:

Sound and quick turn on. The inverter starts up silently: no one even notices how the battery power of the inverters starts up.

Noiseless at work.If the fuel-fired generators are very noisy, then the inverter makes no noise at all.

No exhaust

When using generators, it is important to think carefully about the location and exit of the pipes through which the gases leave the room. The inverter does not emit exhaust gases.

fire safety

The inverter does not require fuel, which reduces the risk of fire.

Mobility. The inverter can be located in any convenient place.

When placing the inverter, it is important to pay attention to the fact that the room must have high-quality thermal insulation. The use of inverters is not only efficient, but also profitable. Of course, its purchase and installation will cost money, but in the future, inverters will pay off and save a lot of money.

Of course, its purchase and installation will cost money, but in the future, inverters will pay off and save a lot of money.

The principle of operation of the inverter

From a technical point of view, each inverter is inherently a converter. These devices are integrated uninterruptible power supplies that convert direct voltage to alternating voltage. The output of 220 volts ensures the normal operation of appliances and household appliances available in the house.

As power sources for inverters, sets of high-capacity industrial batteries are used, in the amount of several units. All household electrical equipment is also connected to them. When the voltage in the central network is turned off, all household appliances immediately switch to power supply from batteries. When the main power is restored, the inverter automatically switches to the battery charging mode, and the home equipment starts working from the central network.Thus, uninterrupted power supply of a private house is ensured.

It is necessary to separately consider the processes of accumulation and storage of electricity in the inverter system. A normal duty cycle is ensured by the use of special high-power batteries with a capacity of 200 VA and more. Unlike conventional batteries, these devices are manufactured using state-of-the-art technology. For example, batteries made using GEL technology use a gel electrolyte rather than a liquid electrolyte. Batteries made using AGM technology are filled with dry electrolyte. In the latter case, a special cloth is used, impregnated with electrolyte and firmly pressed into the battery plates.

In case of damage, only dust that is not dangerous to others can fall out of the battery, which makes the inverter-type backup power supply environmentally friendly and safe. They can be freely installed in residential premises of any purpose. Batteries themselves are consumable equipment of inverter systems. Their service life averages from 8 to 12 years, after which replacement is required because further operation will lead to loss of power.

Transmitter Selection Criteria

The first thing to pay attention to is the power reserve of the IV, which should be at least 25% of the total load of all consumers while they are working. Starting currents exceed the nominal values ​​several times

If the manufacturer does not separately indicate the magnitude of the peak load, then the nominal parameter should be considered as such.
Next, you need to consider the geometry of the output signal. Hybrid converters have the best such parameter.A hybrid or multifunctional device is considered the most reliable equipment of a solar system.
Of great importance is the efficiency factor, which determines the proportion of energy lost to accompanying processes. The optimal value of the coefficient should be at least 90%. High-quality devices have an efficiency of 95%.
In domestic conditions, single-phase inverters are the best choice, since household appliances and devices operate on a current of 220 volts and a frequency of 50 Hz. Three-phase IVs give out current with a voltage of 315, 400 and 690 V.
Manufacturers equip expensive equipment with output transformers. The presence of such devices is determined by the distribution of 1 kg of the mass of the device for every 100 W of power.
A reliable high-quality converter must have several protection circuits. This is a forced cooling fan, as well as short circuit fuses and surge suppressors.
The presence of a standby mode can significantly reduce the rate of battery discharge. Switching to standby does not turn off the inverter completely. The energy consumed is reduced by several times and is spent only on maintaining the device in working order.
The manufacturer indicates the operating temperature range in the accompanying documentation. It is necessary to pay attention to this when operating the IV in a room without heating.
If a solar panel power exceeds 5 kW, then install several inverters. The optimal solution would be to use one IW for every 5 kW.

welding inverter

Connection

Depending on the configuration and equipment, the following connection schemes can be selected.

With DC charge controller

The essence of the scheme is to recharge the battery through the MPPT controller. Here, a converter is used that supports the transfer of energy to the network or load if Uacb is greater than the set parameter.

The advantage of the solution lies in the efficiency of using alternative energy with frequent on / off.

The second point is the ability to connect a solar battery after the battery is discharged.

With mains or hybrid converter

Here, a network-type converter is mounted on the terminals of the inverter battery. In this case, both converters are connected to different solar power sources.

The hybrid converter is connected to the photovoltaic cell to charge the battery, and the network is combined with the main solar battery module.

Peculiarities:

• the need to adjust the network inverter;
• uninterrupted power supply regardless of mains voltage;
• battery charge from the terminals;
• battery operation on the buffer principle, which prolongs their life.

The total power of the network device must be less than the power of the hybrid device. In this case, it is easier to recycle electricity from solar panels when the battery is discharged and the power is turned off.

General points:

1. The length of the wires for direct current should not exceed three meters. If necessary, it is better to increase the AC connection.
2. The optimal installation of the inverter is at eye level. This makes the data on the screen easier to see.
3. The device must not be installed in a box made of combustible materials.

If the inverter has a power greater than 0.5kW, it is important to ensure the rigidity of the connection between the product and the wires.

Overview of popular models

Inverters of domestic production

Russian inverters from the UMA company are high-quality devices with a rated power of 2.5 kW and a maximum of 5 kW. The operating voltage of such installations is 24 V with a system power of 220 V. It combines the functions of not only an inverter, but also an uninterruptible power supply, a controller and a mains charger, with a capacity of 20 A-30 A.

The SV15000s device from the Russian company Sunville. Refers to a three-phase network type of inverters with a rated power of 15.0 kW. The maximum efficiency is 97.8%. The rated operating voltage is 720 V.

MAP Energia deserves special attention. It offers a wide range of inverters ranging from 800W to 1200W.

Inverters from Energia are suitable for all types of batteries. They are installed in private homes, as well as in many industries, medical centers, weather stations, and are used in construction.

It was Energia that produced the first inverter with increased power - 20 kW, which can withstand a maximum load of 25 kW. This device is able to supply electricity to a multi-storey building with a large number of different equipment and appliances.

Foreign inverters

Inverters from the French manufacturer Schneider Electric have proven themselves well. The company produces equipment for solar power plants with high functionality. Such inverters can be used in regions with different climatic conditions.

The body of the transducers is coated with special compounds that are resistant to corrosion, as well as to the effects of aggressive substances. It is possible to use installations from Schneider Electric in private houses, high-rise buildings and in private industries.

Inverter for solar batteries «Schneider Electric»

The Conext series inverters are available with over 96% efficiency even with maximum loads. Some models are equipped with a distribution block, so the installation of an external electrical panel is optional. In the product range you can find models with different power ratings - from 4 to 20 kW.

Taiwanese inverters "ABi-Solar" in the Russian market are represented by a series of autonomous converters with an efficiency of at least 94%, as well as multifunctional devices NTR and NT. Installations are completed with charge controllers from phytopanels. They also combine three functions:

• convert energy;
• perform the function of a controller;
• work like a charger.

The built-in LCD display allows you to monitor the main indicators of the entire solar system.

Kostal grid inverters for solar systems are high-quality single- or three-phase devices of a new generation with power from 1.6 to 25 kW. The design includes an AC circuit breaker, MPP trackers, a display, a meter and much more, which makes the operation of the converters convenient and reliable, and also allows you to connect them to the smart home system.

Thanks to the housing materials, Kostal inverters can be installed both indoors and outdoors. In any case, it is quite difficult to damage them. All models are assembled in Europe and meet international quality standards.

The Dutch company TBS Electronics has been producing inverters of various capacities for more than 20 years.The models in the Powersine range are characterized by a pure sinusoidal output signal, so their use guarantees uninterrupted and long-term operation of devices that are sensitive to voltage drops. The equipment is equipped with protection against temperature extremes and power surges. With such converters, it is possible to give loads up to 500 V with a starting force that is ten times higher than the working one.

Why you need a solar inverter

In our world, there are many systems that consume 220 V AC. In this case, an inverter for solar panels is needed to convert the current into AC, otherwise its production becomes meaningless. Solar panels generate constant electricity with a voltage of 12 V, 24 V and a maximum value of 48 V. It is the inverter that makes the use of such batteries suitable for a 220 V network.

Design features

The inverter itself consists of a low-frequency adapter (diodes and a rectifier), a varicap (functions due to triodes with a conductivity of more than 4 microns), dinistors (provide sensitivity) and a lining.

Many modifications of such units consist of a mandatory element - an uninterruptible block. If there is no DC supply in the event of a power failure, electricity will not stop flowing to the battery (charged through the charger), then to the inverter and to the place of energy consumption in electrical appliances. The structure of the uninterruptible power supply includes monitoring the voltage level due to the microcontroller. It gives a command to connect power sources in the event of a power outage.

The presence of a transformer in the design is an optional link, often making it heavier.But, in the presence of this element, it becomes possible to cause a signal at the output of super high quality.

The design of the system may include a fan that functions forcibly and is designed for silent operation with several modes (in the most expensive models).

It is possible to combine several inverters into three-phase units with increased power and an expanded range of tasks, designed for 380 V (three-phase network).

Principle of operation

First, the solar battery acts as a converter of sunlight into electric current, then the battery system is properly charged with current and the correct voltage, this charge is maintained in the batteries, and, by connecting the inverter apparatus, the direct current is converted into alternating current.

An inverter is a semiconductor type device, that is, the golden mean between the electrical conductivity of metals and dielectrics (some have a very high mark for this indicator, others do not conduct electricity). To use energy in the dark, the accumulation occurs in the battery.

Important Features

• in order to avoid waste of energy, the efficiency must exceed the level of 90%; the average value reaches 94%, for optimal models - up to 99%;
• categorical absence of radio interference;
• condition: stabilized output voltage (trapezoidal type is preferred); minimum input voltage;
• low harmonics;
• temperature range - the wider, the better (affects the quality of the device);
• susceptibility to stress;
• protection against overloads and overheating;
• minimization of losses in the absence of voltage (at idle);
• rated power and maximum current at the output and input;
• weighted average efficiency - a coefficient showing utility at variable voltage values;
• range for determining the maximum possible voltage (the point of the possible power characteristic of the grid inverter for solar panels);
• the level of protection of the execution code from external access to water and solid objects.