How Do Solar Panels Work?

What makes these alternative energy sources function?

Solar panels crown rooftops and roadside signs, and help keep spacecraft powered.

But how do solar panels work? Simply put, a solar panel works by allowing photons, or particles of light, to knock electrons free from atoms , generating a flow of electricity , according to the University of Minnesota Duluth . Solar panels actually comprise many, smaller units called photovoltaic cells — this means they convert sunlight into electricity. Many cells linked together make up a solar panel.

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