Wednesday, 10 September 2008
Solar-Electric Panels AKA: solar-electric modules, photovoltaic (PV) panels
PV arrays can increase the system’s daily energy output by 25 to 40 percent. PV panels are a solar-electric system’s defining component, where sunlight is used to make direct current (DC) electricity. Behind a PV panel’s shimmering facade, wafers of semiconductor material work their magic,using light (photons) to generate electricity—what’s known as the photovoltaic effect.Other components in your system enable the electricity from your solar-electric panels to safely power your electric loads like lights,computers, and refrigerators.
PV panels are assigned a rating in watts based on the maximum power they can produce under ideal sun and temperature conditions.You can use the rated output to help determine how many panels you’ll need to meet your electrical needs. Multiple modules combined together are called an array.Although rigid panels are the most common form of solar electricity collector, PV technology also has been integrated into roofing shingles and tiles, and even peel and-stick laminates (for metal standing-seam roofs). PV modules are very durable and long lasting