• According to Google, when you put in your address, it calculates how much sunlight hits your roof through its mapping data, 3D modeling, possible sun positions, as well as historical cloud and temperature patterns. 
  • Google's solar power wizard will then recommend the appropriately sized panels that will help generate as much electricity as you use. Then Google uses current solar pricing data to calculate when your break-even point is as well as which federal and state tax rebates you're eligible for. 
  • The program is launching in Boston, San Francisco, and Fresno for now, but Google plans to expand it to nationwide eventually. It's not Google's first dalliance with solar -- it's building a major solar array to help power its Mountain View campus. 

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