A ENERGIA SOLAR
While first developed as a practical power source during the 1950s, solar systems were too expensive for mainstream use until the 1970s. Starting from their early use to power Cold War era military satellites, silicon photovoltaic solar cells achieved their first commercial success in places where electricity was not available, such as lighthouses and off-shore oil rigs.
To transform light from the sun into usable energy, photovoltaic cells harness an electric current created by electron flow between the layers of silicon in the cell, which is activated by sunlight. Solar panels typically consist of 36 to 72 photovoltaic cells, and the panels themselves can then be connected to create a solar photovoltaic system for larger installations. Excess energy can be stored in batteries for later use. The solar energy industry is constantly evolving in the efforts to make panels smaller, more efficient, and more affordable.
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