Also, a system with 12 battery inverters and 12 battery sets is also installed, and it serves to store excess electricity produced and distribute electricity to the consumers of the Elektrovat facility when the need arises.

Basic components of Photovoltaic system:

• Photovoltaic panels – form arrays of photovoltaic modules i.e. strings and are producing one-way energy, they are mounted on the roof construction of the building.
• Photovoltaic inverters – convert direct current electricity into alternating 50Hz frequency, are mounted on the upper floor of the building.
• Battery modules – storage of electricity produced by a photovoltaic system, and additionally they supply consumers with energy when the need arises. If more energy is produced than what is consumed, these batteries can be recharged.
• Battery inverters – regulate the balance between energy produced and energy consumed.
• Rechargeable battery sets – used to store electricity obtained from photovoltaic panels

If there is excess energy produced with the PV panel, these inverters redirect the part of the energy and charge batteries, and at the times when electricity consumption is increased, or when solar radiation is reduced or when there is none, battery inverters redirect energy towards consumers.
The application of hybrid photovoltaic systems in on-grid applications enables peak reduction in electricity consumption diagrams, which saves on electricity consumption from the distribution network. Hybrid PV systems also increase power reliability for all installed electricity consumers.

Applications where the photovoltaic system with AC inverters and battery inverters/chargers and battery modules for storing electricity is connected to two independent energy sources, for example, main electrical network and diesel-electric generator or wind generator are called “on-grid” hybrid photovoltaic systems (solar power systems).

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