Google’s Project Sunroof is launching in Germany today, extending the company’s solar estimator to 7 million homes. Project Sunroof is a simple tool that allows you to determine if your house gets enough sun to switch over to solar power, and now 40 percent of the homes in Germany are covered by the project, allowing people to quickly determine if they can save money and lower their carbon footprint by swapping.

Germany’s Project Sunroof is hosted by the Germany electricity provider E.on. Since it is a collaboration between Google and E.on, users are directed to E.on’s solar department if their home is a good fit. This is different than the US, where Google directs users to multiple solar panel providers.
Related: Google’s Project Sunroof shows your home’s solar potential for free
Google doesn’t make money off of the project – it’s provided for free to users. In the US, Project Sunroof currently covers all 50 states.
Via The Verge