What are solar shingles

Solar shingles (or photovoltaic shingles) are a new type of solar energy system that, at first glance, look like regular asphalt shingles but are actually photovoltaic cells (PV). They are manufactured by only a few companies worldwide.
The technology has grown considerably since their inception for use for thermal-solar hot water heaters during the 1920s in Florida and California. Recently there has been a surge toward large-scale production of PV systems. In parts of the world with significantly high insolation levels, PV output and their economics are enhanced. PV (Photovoltaic) modules are the primary component of most small-scale solar-electric power generating facilities. Since the turn of the century, there have been major advancements in solar power and their efficiency; this includes the 2005 release of solar shingles.
Solar-shingled roofs have a deep, dark, purplish-blue color, and therefore look similar to other roofs in most situations. They have aesthetics that are positive in some peoples’ opinion. Unlike other upcoming alternative resources for the home, such as wind turbines or home diesel generators (to reduce transmission costs), they are not obviously solar collectors.
Source: Wikipedia

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