US: Usually, people who consider using solar panels to power their homes find themselves riddles with questions. How do they determine how many panels they would need? Who would do the installation? And most importantly, how much money would they actually save? Well, Google noticed many people looking for these answers, and decided to come to their rescue. It has launched a new initiative called Project Sunroof. The tool uses high-resolution satellite imagery of Google Maps to figure out how much sun falls on a roof. Then it uses those measurements to figure out how many panels you’d need to save on your electric bill. So, what are you waiting for? Just plug in your address and get started!