The Motley Fool
Solar energy in 2013 removed its training wheels and started competing with traditional energy sources. In the fourth quarter alone, the average weighted price per watt of solar capacity installed dropped by 15%, averaging $2.59 compared to more than $6 in 2010. Last quarter, SolarCity installed a total of 70 megawatts of residential solar capacity, cementing its leading position in the U.S. residential solar market. With 41% overall domestic growth last year and sharply declining costs, solar energy is no longer for the wealthy, it's here for the masses.