A solar panel consists of many solar cells with semiconductor properties. An inverter is an electrical device that converts direct current (DC) to alternating current (AC). The structure is the mounting device that fixes the solar array to the ground or roof.
A solar panel consists of many solar cells with semiconductor properties encapsulated in a material to protect it from the environment. These properties allow the cell to capture light, or more specifically photons, from the sun and convert their energy into useful electricity through a process called the photovoltaic effect. On both sides of the semiconductor is a layer of conductive material that "collects" the electricity produced. The illuminated side of the panel also contains an anti-reflective coating to minimize loss due to reflection. The majority of solar panels produced worldwide are made of crystalline silicon, which has a theoretical efficiency limit of 33% for converting solar energy into electricity. Many other semiconductor materials and solar cell technologies have been developed that operate at higher efficiencies, but they come at a higher cost to manufacture.
An inverter is an electrical device that converts direct current (DC) to alternating current (AC). This conversion is necessary for the operation of most electrical devices and for synchronizing with the electrical grid. Inverters are important to almost all solar energy systems and are usually the most expensive component after the solar panels themselves.
Most inverters have a conversion efficiency of 90% or higher and contain important safety features, including a number of automatic protections. Grid inverters shut down the PV system when there is a loss of grid power.
The structure is the mounting device that fixes the solar array to the ground or roof. It is usually made of steel or aluminum, fixing the solar panels with a high level of precision. Mounting systems must be designed to withstand extreme weather events such as high gusty wind loads and heavy snow accumulations. Another important feature of mounting systems is the grounding of the solar array.Rooftop photovoltaic structures generally come in two variants - flat roof systems and pitched roof systems. For flat roofs, the mounting system is usually gravity-weighted using ballast weights. For pitched roofs, the mounting system must be mechanically fastened to the roof structure.
Ground-mounted photovoltaic structures are fixed to the ground by "stabbing", concreting, or again by counterweights, similar to roof ones. Ground-based PV structures can include tracking systems (tracker systems) that use motors and sensors to track the Sun, increasing the amount of energy generated by pointing the panels at an appropriate angle to the sun's location, at higher equipment and maintenance costs.
The battery accumulates the excess energy created by the photovoltaic system and stores it for a short time to be used at night or when there is no other energy source.
The remaining components of a typical solar PV system include combiners, circuit breakers, meters, wiring, cable trays, accessories, etc.
