Online Tool that Determines the Solar Potential of Your Roof

Online Tool that Determines the Solar Potential of Your Roof

Ever wonder what potential your roof has for solar power generation ? To answer this question now there is a website ( Roofray ) that is looking to help answer all of those queries using satellite data and a hands-on web site. Basically it’s a solar clearinghouse that uses Google satellite data and info from the National Renewable Energy Labs to help users make good decisions about what sort of system to buy.

Here’s how it works: enter an address, pull up the satellite image of the chosen building’s rooftop and then using the RoofRay tool based on Google maps, draw your solar arrays ( YouTube video attached). Data on square footage of the system, slope of the roof, power per square foot and total peak power all show up in a chart, and the info displayed depends on how big you’ve drawn your system.

After drawing the panels you can dive into metrics based on the size and location of your solar system, including projected performance, financial analysis, average monthly utility bill after solar is added, total cost summary and, our favorite, time until the system pays for itself. The biggest potential of the site for the user could be the ability to test out how good a home’s solar potential is before buying it. – Via


  • Jennifer August 29, 2008 at 02:13 AMLogin to Reply →

    Nowadays, Solar system was really useful, we lost a lot of energy everyday, but we could not gain any more energy. But, by using solar system, I think we can maintained our earth.

  • Mike T. September 2, 2008 at 01:43 AMLogin to Reply →

    I tried it and determined that it would cost $24,000 (after rebates) and would take 18 years to break even. Increasing the size pushes the break-even out slowly. Costs and efficiency haven’t changed in the six years since I last priced solar.

    On the other hand, a 30-foot wind turbine from would run $7000 (before rebates) with about a 4-year break-even.

  • Total Solar Energy September 26, 2008 at 09:35 AMLogin to Reply →

    great idea. i think san francisco have a similar scheme in place

  • john-san francisco , sfc ca June 29, 2009 at 11:50 AMLogin to Reply →

    cool post my first time here and i like the way you write ! bookmark it !:)

  • Got A Roof? Wonder How Good It Is For Solar Power? | These Are Those Things February 4, 2010 at 23:22 PMLogin to Reply →

    […] is a clever website.  I first read about here at Freshome.  It has all the tools to determine the potential of any roof to generate solar power. […]