Photovoltaic Cells

Photovoltaic cells are devices that produce electricity directly from sunlight. Many photovoltaic cells put together form a solar array or solar panel. These cells convert light into electricity by harnessing the energy created when photons from sunlight knock electrons into a higher state of energy, within the cell itself. Photovoltaic cells are composed of layered materials which include two types of silicon, an anti-reflective coating, and a glass cover. The technology used to produce solar panels continues to advance, and may one day provide essentially free energy to power homes and businesses.

Solar Panels

There are several varieties of solar panels available on the market. The most common is a third generation silicon crystal panel. These panels are efficient enough to pay for their purchase price in 5-7 years of power production. This means you are essentially getting three to eight years of free power in the engineered lifetime of a solar panel. A newly emerging technology is the thin film solar array. This new technology allows solar panels to be made utilizing much less material than is needed for traditional methods. While they are less efficient currently than the more established crystal arrays, they also don’t need to produce nearly as much power to meet their production costs.