**EMBARGO: No electronic distribution, Web posting or street sales before 12:01 a.m. ET Wednesday, Oct. 8, 2014. No exceptions for any reasons. EMBARGO set by source.** A SolarCity employee works on a solar panel installation at a home in Camarillo, Calif., June 27, 2014. SolarCity, which became the nation's largest rooftop solar installer by leasing the equipment to their residential customers, is going to start allowing them to buy the systems outright, with payments based on how much electricity their system is producing. (J. Emilio Flores/The New York Times)
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