Google’s Project Sunroof increases operation to all 50 US states

Facebook
Twitter
LinkedIn
Reddit
Email
Google's Project Sunroof program now offers services to all 50 states in the US. Image: Google

Google announced Tuesday that its online PV appraisal service, Project Sunroof, has now expanded to all 50 US states, with a total of approximately 60 million buildings now analyzed by the program.

The program, which uses imagery from Google Maps and Google Earth, helps calculate the amount of sunlight received by each portion of a roof over the course of a year, using the estimated sunlight to determine energy production using industry standard models for solar installation performance.

This article requires Premium SubscriptionBasic (FREE) Subscription

Unlock unlimited access for 12 whole months of distinctive global analysis

Photovoltaics International is now included.

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Unlimited digital access to the PV Tech Power journal catalogue
  • Unlimited digital access to the Photovoltaics International journal catalogue
  • Access to more than 1,000 technical papers
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

Originally started in 2015, Project Sunroof was only available in Massachusetts and Northern California – but the program has rapidly grown over the last two years.

Project Sunroof’s new expansion has revealed new insight into the current state of rooftop solar in the US.

According to the new data, 79% of all rooftops analyzed are technically viable for solar, including 90% of homes in Hawaii, Arizona, Nevada and New Mexico. States such as Pennsylvania, Maine and Minnesota are just above 60% in terms of rooftop PV viability.

Houston boasts the most solar potential of any US city in the Project Sunroof data with an estimated 18,940 GWh of rooftop solar generation potential annually. Los Angeles, Phoenix, San Antonio, and New York follow Houston for the US cities with the most solar potential.

Read Next

July 8, 2025
Energy consultancy JMK Research has forecast 28.3GW of utility-scale and residential solar PV to be installed in India during fiscal year 2026.
Premium
July 8, 2025
In the latest NEM data spotlight, solar generation in Australia reached its yearly lowest month, while rooftop solar prices spiked to AU$225.57/MWh.
June 11, 2025
A new report has claimed that creating a Sydney renewable energy zone (REZ) in New South Wales, Australia, could generate up to 21GW of renewable energy from rooftop solar PV.
June 6, 2025
Australia’s Solar Energy Industries Association (SEIA) has called on Australia’s climate change and energy minister, Chris Bowen, to “urgently intervene” on a rule change that could threaten to derail the uptake of rooftop solar PV.
June 6, 2025
ElectraNet has revealed that renewables supplied 100% of South Australia's electricity demand for 27% of 2024, roughly 99 days.
Premium
June 3, 2025
In May 2025, utility-scale and rooftop solar PV dipped by 579GWh month-on-month in Australia’s National Electricity Market (NEM) to 2,861GWh.

Subscribe to Newsletter

Upcoming Events

Media Partners, Solar Media Events
September 2, 2025
Mexico City, Mexico
Solar Media Events
September 16, 2025
Athens, Greece
Solar Media Events
September 22, 2025
Bilbao, Spain
Solar Media Events
September 30, 2025
Seattle, USA
Solar Media Events
October 1, 2025
London, UK