Technical Potential of Rooftop Solar Photovoltaics

Silicon Valley, 2018

Number of Additional Viable Rooftops668,200
Estimated Total System Size (Megawatts DC)14,188

Data Source:

Google Project SunRoof, Data Explorer


Silicon Valley Institute for Regional Studies

Data are from the 2010 U.S. Census, National Renewable Energy Laboratory weather data, EPA GHG Equivalencies, Department of Energy SLED (State & Local Energy Data), and Google Maps via the Google Project SunRoof, Data Explorer (dated November 2018, accessed November 2019). Silicon Valley includes the city-defined region. This tool estimates the technical solar potential of all buildings in a region. Technical potential includes electricity generated by the rooftop area suitable for solar panels assuming economics and grid integration are not a constraint. There are many definitions of technical potential, and other definitions may affect results by 25% or more. Based on Project Sunroof’s definition of technical potential, installations meet the following criteria: every included panel receives at least 75% of the maximum annual sun in the county, every included roof has a total potential installation size of at least 2kW, and only areas of the roof with enough space to install four adjacent solar panels are included (obstacles like chimneys are taken into account).

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Resources for Relevant Data and Reports (show)

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