Gone are the days when solar panels were so expensive that you would only see them on the rooftops of wealthy people who wanted their houses to look like they were from the future. Incredible advancements in technology and production processes have brought the price of the panels down. As the total capacity of solar photovoltaic panels has increased from less than 10 MW in 1976 to more than 100 GW in 2012, their price per Watt has plummeted from almost $100 to less than a dollar.
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