Google has a plan to solve our energy needs by helping us build one solar roof at a time using its new project named Project Sunroof. Project Sunroof is an online tool that helps you develop a plan to convert your roof into an energy producer using solar power.
Project Sunroof asks for your address, maps your roof, compute resources to use and helps calculate the best solar plan for you. Project Sunroof recommends an installation size to generate close to 100% of your electricity use, based on roof size, the amount of sun hitting the roof and your electricity bill.
You can read more details here About Project Sunroof