When the batteries in a solar power system are fully charged, any excess electricity generated by the solar panels is usually sent back into the grid if the system is grid-tied.
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They use this sunlight to create direct current (DC) electricity through a process called "the photovoltaic effect.
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Solar power plants use one of two technologies: • (PV) use, either on or in ground-mounted, converting sunlight directly into electric power. • (CSP) systems use mirrors or lenses to concentrate sunlight to extreme heat to make steam, which drives a to generate electricity.
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PV cells are electrically connected in a packaged, weather-tight PV panel (sometimes called a module).
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