The City and County of San Francisco has a new open data site:
Please follow the link to the site to search, browse and view San Francisco data.

Description: To encourage more installations of solar power in San Francisco, the City has been offering incentives to San Francisco residents and businesses to install solar power on their properties. GoSolarSF has been one of the most successful and popular environmental initiatives sponsored by the city. It empowers residents, business owners and non-profits to reduce their own carbon footprints and power their homes and businesses with renewable energy.
Agency Name: San Francisco Public Utilities Commission
Date Released: Monthly
Frequency: Monthly
Location of dataset:

DataSF is a clearinghouse of datasets available from the City & County of San Francisco. Our goal in releasing this site is:
(1) improve access to data
(2) help our community create innovative apps
(3) understand what datasets you'd like to see
(4) get feedback on the quality of our datasets.