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Community shared solar is a new and growing model for broadening local solar markets and extending the benefits of solar energy to new customers. By expanding access to solar energy, community shared solar can be a useful tool for San Francisco and other jurisdictions that seek to expand use of distributed, local solar power. To help educate stakeholders, including other Rooftop Solar Challenge partners and other cities, this paper discusses: (1) the basics of community shared solar; (2) the benefits of community shared solar; (3) variations in design of community shared solar programs; (4) examples of community shared solar program; (5) California’s regulatory context; and (6) community shared solar’s potential to expand San Francisco’s solar market. Community shared solar could also improve San Francisco’s solar market by enabling more San Francisco residents and businesses to invest in solar energy. The majority of San Francisco residents live in multi-family buildings, rent, or both: two-thirds of residential units are in multi-family buildings and 60% of San Francisco households rent. Community shared solar would allow renters and others who cannot install solar onsite to purchase solar energy for their home or business.