Solar energy is the energy that is produced by the sun. Solar energy is renewable and free source of energy. Beneficial to this, solar energy is a sustainable energy source that has no emissions. Photovoltaics (PV) system, or simply solar system, is a multi-item assembly that converts solar energy into electricity. When sunlight reaches solar panels, solar panel cells capture certain waves and transform them into electricity.
Photovoltaics (PV) modules, mostly known as solar panels, made up of PV cells that are connected in series. Exactly these cells use sunlight to generate direct current (DC) electricity that is transferred to an inverter.
As we already know, PV modules produce DC electricity. However, most appliances operate from alternating current (AC) electricity. The grid uses AC electricity as well. For us, to be able to use DC electricity, it needs to be converted into DC electricity. That is the task for an inverter.
Battery is an additional component in a Solar PV System. Battery is used to storage energy that was produced by solar panels and typically used during night time. As solar panels do not produce electricity during night time, you use electricity form the grid. If your system includes battery, then, during rainy days and night time, you use the stored energy from the battery.
Additional equipment that safely transmit electricity from PV modules to house loads is called the Balance of System (BOS). This includes:
- Safety devices;
- Mounting system;
- Monitoring devices.
Such system is the most common installation for households and businesses. Your house can receive electricity from a solar system and from the grid. Initial source is a solar system, when solar panels do not produce electricity, or produce not enough, electricity is supplied from the grid. When there is excess of electricity produced by solar panels, usually, it can be exported to the grid.
A Stand Alone System is not connected to the electricity grid. Usually, such systems are installed in areas where the grid connection is not available and include battery.
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