Some disadvantages are that they depend on the availability and intensity of sunlight, require maintenance and cleaning, and have high initial costs. Some advantages of solar panels are that they use a renewable and clean source of energy, reduce greenhouse gas emissions, and lower electricity bills. This is called a grid-connected photovoltaic system. A photovoltaic system can be used to provide electricity for off-grid applications, such as remote homes or cabins, or to feed electricity back into the grid and earn credits or payments from the utility company. A photovoltaic system consists of one or more solar panels, a inverter that converts DC electricity to alternate current (AC) electricity, and sometimes other components such as controllers, meters, and trackers. Solar panels are usually arranged in groups called arrays or systems. Solar panels are also known as solar cell panels, solar electric panels, or PV modules. The electrons flow through a circuit and produce direct current (DC) electricity, which can be used to power various devices or stored in batteries. PV cells are made of materials that generate electrons when exposed to light. A solar panel is a device that converts sunlight into electricity by using photovoltaic (PV) cells.
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