Sunrun Inc. is an American company that provides solar photovoltaic systems and battery energy storage products primarily for residential customers. The company was founded in 2007 and is based in San Francisco, California.

Since its inception, the company has primarily focused on a power purchase agreement (PPA) business model, in which Sunrun installs and maintains a solar power system at a customer’s home and sells the electricity to the customer for an agreed fee over a period of 20 or 25 years. This business model allows property owners to install solar with no upfront costs, but with the benefits (such as tax incentives) and some risks associated with owning the system. The company has an extensive network of partners, including Costco and The Home Depot, which allows Sunrun to market to in-store customers. By 2021, the company will have installed solar power systems capable of generating 792 megawatts of electricity, with a total of 4.68 gigawatts installed for more than 660,000 customers in the company’s history.