Thursday, April 7, 2011

SolarEnergy - "Photovoltaic Cell" System


Many PV "Photovoltaic cell"s, connected in series, form a PV module; several modules attached to a frame form a solarenergy electric panel. A panel can power a stand-alone system, simply and cost-effectively generating electricity away from the power lines, or it can be connected to the power grid, allowing the owner to sell the electricity generated.

Components of Solarenergy Electricity Generation

The basic components of a PV "Photovoltaic cell" system (Figure 7) include:
  • PV modules which are a group of cells that generate an electric field by absorbing sunlight, resulting in direct current (DC) electricity.
  • An inverter which converts the DC electricity from the PV modules into the alternating current (AC) electricity is used in the power grid and is required by most electrical appliances.
Most PV "Photovoltaic Cell" systems in operation use one centralized inverter to convert electricity from multiple panels. These large inverters involve power loss and can be noisy.
Photovoltaic power diagram. Courtesy of Go Solar.
Figure 7. Photovoltaic power diagram. Courtesy of Go Solar.
Microinverters, a new technology, attach directly to each solar module in the power system.

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