SolarCity Corporation (SolarCity) is engaged in the design, installation and sale or lease of solar energy systems to residential and commercial customers, or sale of electricity generated by solar energy systems to customers. The Company�s solar energy products include Solar Energy Systems, and SolarLease and power purchase agreement finance products. The Company�s energy efficiency products and services include home energy evaluation and energy efficiency upgrades. The Company sells home energy efficiency evaluations to new solar energy system customers and existing customers. The Company�s other energy products and services include electric vehicle charging and energy storage. In September 2013, it acquired the assets of Paramount Energy Solutions, LLC, doing business as Paramount Solar, a subsidiary of Paramount Equity. Effective December 11, 2013, SolarCity, through its wholly owned subsidiary, acquired the entire interest of Zep Solar Inc.