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Homeowners, Realtors and Prospective Buyers Can Now Instantly Find Out a Home’s Solar Energy Potential with Sun Number Scores on Zillow

Sun Number’s Rooftop Solar Power Potential Technology Now Featured on Zillow

Deephaven, MN – WEBWIRE

Sun Number and Zillow® are putting instant analyses of properties’ solar energy potential at the fingertips of homeowners, home buyers and real estate agents with a new feature on Zillow that makes the Sun Number rating of a residence just a click away.

Sun Number provides a simple-to-understand analysis of how solar-friendly a building is based on factors such as regional climate, daily sun exposure, foliage coverage from nearby trees and more. The 0-100 score and accompanying details help users understand how much they can benefit from solar power, reducing their utility bills and reliance on fossil fuels in the process.

Sun Number scores are immediately available on Zillow for more than 40 million individual buildings nationwide, with more properties being added on monthly basis. By simply entering the address of a property, Zillow users can immediately get a Sun Number Score that explains the solar suitability of a building. This is the first instant solar energy analysis tool of its kind in the United States, and its inclusion on Zillow makes this information available alongside so many other valuable data points about residential properties.

“Zillow is a go-to resource for millions of people who are thinking about selling their house, buying a house or who are just curious about what their house is worth. Now, Sun Number and Zillow gives them instant access to information about how much they can benefit from renewable solar energy. In the past, getting an accurate solar assessment for your home required a visit from a solar professional who would spend half a day up on your roof. But the technology we use makes that immediately accessible just by typing your address into Zillow’s website and looking for the Sun Number score,” said David Herrmann, co-founder of Sun Number.

Sun Number developed this tool with support from the U.S. Department of Energy SunShot Initiative Incubator program, which fosters technologies that promote and accelerate the adoption of solar energy across the country. The Department of Energy considers Sun Number’s technology impactful for fostering broader adoption of renewable solar technology in the United States, and a detailed profile of Sun Number is featured on the DOE’s website (See below for link).

“Zillow is excited to partner with Sun Number, giving buyers, sellers and agents valuable information about how they can use solar power, potentially lower their utility bills, and focus on sustainability,” said Jeremy Wacksman, Zillow’s chief marketing officer.

Herrmann added: “One thing that may surprise many Zillow users is how high the scores are for properties in markets that one doesn’t typically associate with solar, including markets in the Pacific Northwest, markets in the North and Northeast with harsh winters, and others. Many users who never thought their region was a candidate for solar panels will be pleasantly surprised to find out that their house is well suited for renewable energy and they can save a lot on traditional utility bills in the process.”

For more information, visit And to read a profile of Sun Number published by the DOE, please visit:

About Sun Number

Sun Number, LLC, is accelerating the adoption of rooftop solar energy across the United States by providing solar providers and property owners with instant assessments of the solar potential of homes and commercial buildings. With a single click, Sun Number provides an analysis of how solar-friendly a building is, using a patented methodology that factors in a range of data from sun exposure to regional climate to foliage. This produces a Sun Number Score that provides information solar companies can use to shorten the sales cycle and property owners can use to understand how much they can benefit from solar power. Sun Number, LLC, was founded in 2012 with a SunShot Incubator award from the U.S. Department of Energy that supports emerging companies broadening adoption of solar energy technology. For more information about Sun Number, visit



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