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A hybrid solar inverter  converts DC (direct current) to AC (alternating current), capable of working both with SPP (solar power plant) batteries and with a centralized 220V or 380V power grid. Combines the capabilities of autonomous and network devices. Hybrid inverters are becoming more and more in demand for customer who face frequent power outages.

How to choose a hybrid solar inverter

  1. Selection of the hybrid inverter firts of all is based on the system parameters. Since a solar power plant is a long-term investment, we recommend choosing a good inverter from reliable manufacturers. Respected brands test their products more thoroughly, use proven components of better quality, have large production facilities and use advanced technologies.

Choosing the right inverter begins with choosing its characteristics and functionality:

  1. The nominal power of the inverter must correspond to the power of the photovoltaic system. The rated power of the solar panels may be higher than the rated power of the inverter. If the power of the inverter is significantly less, this can negatively affect the performance, since it will not be able to convert the entire amount of electricity produced by the panels during periods of intense radiation.
  2. The maximum DC voltage must not exceed the permissible input voltage of the inverter, otherwise it may fail.
  3. The efficiency should be at least 95%. The low efficiency of the inverter (up to 85%) will cause a loss of 15-20% of the total power generation of the panels.
  4. High-quality inverters with a sinusoidal voltage form guarantee ideal parameters both for the power system and for powering domestic and industrial consumers.
  5. Monitoring and security. The inverter monitors the production of electrical energy by the photovoltaic installation and monitors the power grid to which it is connected. The presence of a set of built-in protective equipment on the side of DC and AC will protect the system in the event of abnormal modes.
  6. A high degree of IP protection allows the inverter to be installed anywhere outdoors. The advantage is that the closer it is installed to the modules, the lower the cost of relatively expensive wiring.
  7. An efficient and reliable cooling system is important – it allows inverters to work at maximum rated power, even at high ambient temperatures.

A hybrid inverter is a modern device that can be used as a source of uninterrupted power in the absence of power supply from the external network.

Almost every photovoltaic installation is unique and must be designed with specific conditions and requirements. Our specialists will develop a project according to an individual order for our customers. 

Types of inverters

Inverters used in alternative energy systems are divided into 3 types:

Off-Grid. They are not connected to the network. They receive DC current from the solar panels of the SPP or its battery, convert it into AC and send it to consumers. They are used where there is no network power supply or it is of poor quality.
Grid Tied to the network and to solar panels. There is no battery in the system. During the day, when consumption is minimal, they receive DC current from photovoltaic cells, convert it into AC and send it to power household appliances. 
Hybrid inverters. Connected to the network (and/or to the generator), as well as to the solar panels and the SPP battery. Depending on the load, they independently switch between energy suppliers. Priority is given to SPP devices that supply DC current.
The third option is universal, if there is a network supply. Buying a hybrid inverter means providing your home with stable electricity, regardless of central grid problems and with cost savings.

Advantages of a hybrid inverter

A hybrid inverter for solar power plant combines the functions of a grid tied and off grid device. During the day, the hybrid inverter charges the batteries, feeds the load, and transfers excess electricity to the grid.

The main advantages of hybrid inverters are:

  1. The possibility of organizing a complete cycle of operation of the photovoltaic system. Hybrid inverters control the photovoltaic system, the battery and the external network, which connects all these elements through itself.
  2. The user can choose modes of consumption, accumulation and transfer of excess electricity to the network. Hybrid inverters have mode programming, thanks to which the rational use of energy is ensured. They are capable of supplying alternating current to selected loads during a power outage.
  3. Ability to combine electricity consumption. Modern inverters are able to simultaneously transmit energy from different sources directly to consumers.
  4. Backup power – depending on the set mode, in the dark or in cloudy weather, the device can power the house from the battery or from the network. In case of a network failure, inverter will switch to battery power.
  5. Work autonomy. If there is a grid, the hybrid inverter works as if connected to it. In case of a power outage, the device provides power from the battery or from solar panels, depending on the time of day.
  6. The most effective use of solar radiation occurs due to the accumulation of energy in the battery and its use at night or in cloudy weather.
  7. Hybrid inverters with built-in chargers manage the charge of the battery, protecting it from deep discharge and, more importantly, from overcharging. With a high-efficiency MPRT controller that tracks the maximum power point of a solar panel, you can increase system performance without adding panels.
  8. With a hybrid inverter, all solar electricity – sent to the grid, consumed by a household or stored in a battery – is converted through a single component. This allows for centralized monitoring – you can monitor the entire SPP using one platform.
  9. The device provides automatic start and stop of the diesel generator depending on the battery voltage level using additional relays.

A hybrid solar inverter is an advanced, multi-functional solution for your PV system.

Operation features of the hybrid inverter

A hybrid inverter for solar batteries, unlike a grid inverter, does not simply switch between solar panels and the central line. It can “mix” current from one source to another. For example, at peak loads, current from the battery is added to the energy from the network.

The controller directs the electric current from the solar panels directly to the inverter or to charging the battery. The latter – when the consumer load is reduced, compared to the limit value. When the batteries are already charged, and the current consumption in the house is minimal, the excess energy from the photovoltaic cells is converted (DC to AC) and goes to the network.

If the main power line is unexpectedly disconnected for any reason, the device automatically switches to autonomous operation mode, with power for consumers only from panels or batteries.

A device of this type can have sockets at the input for connecting not only the central network and the battery, but also the generator of a diesel power plant. There can also be two AC 220V outputs: main and auxiliary.

Operating voltage at the output: 220V or 380V. The first option is used in domestic conditions, in offices, etc. The second is mainly in manufacture. 

In Cyprus, a hybrid inverter is the most popular type of solar energy converter. Despite the fact that the price of models offered in stores is higher than autonomous systems, they fully justify themselves.

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