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Sun Number Launches Free Solar Assessment Service for Property Owners in Los Angeles and Orange County

DOE-Funded Company Launches One-Click Service For Determining If A Property Can Benefit From Solar Energy


Sun Number has launched a free online service that makes it possible for property owners in Los Angeles and Orange County to instantly find out the solar energy potential of a home or commercial property. Available at, this service has just been made available for people in the Los Angeles, Anaheim and surrounding areas in L.A. and Orange Counties.
Developed with funding from the U.S. Department of Energy’s SunShot initiative, this first-of-its-kind service makes it possible for anyone in this region to obtain an immediate assessment of how suitable a building is for rooftop solar. The assessment provides a Sun Number Score between 1 and 100 as well as other easy-to-understand information that explains how much a building can benefit from installation of solar on the rooftop.  
Sun Number for Property Owners
The Sun Number website provides a free, instantaneous analysis that allows property owners to turn their curiosity about solar energy into practical information about how much money they can save in utility costs by installing solar panels. The site also offers to connect the property owner with a local solar provider that can discuss solar solutions in more detail with no obligation to buy. The service was developed with funding from a DOE program designed to educate the public about solar energy and broaden adoption of the technology nationwide.
“Just type in the address of your home or commercial building at the website, and it gives you a Sun Number Score that explains the dollar value of the electricity that rooftop solar panels could generate per year. It gives you an accurate estimate of the amount that property owners can save in utility costs per year. It also helps people understand how favorable their roof is compared to the average for the region,” said David Herrmann, co-founder of Sun Number. “Southern California has outstanding conditions for solar energy, and is the simplest way to learn how much you can benefit from a rooftop solar installation.”
Sun Number for Solar Companies
For solar companies in Los Angeles and Orange Counties, Sun Number provides an instant, accurate analysis of a property’s solar potential during the very first conversation with a customer. This is dramatically faster and less expensive than the traditional method, which required solar companies to send a truck to the property for an employee to conduct a rooftop assessment. That process not only ties up the employee for half a day of on-site work but often slows down the consultation process with the customer by several days.
Herrmann added, “Sun Number accelerates the sales process for solar providers, and it also increases the profit margin on each project by lowering soft costs. Using Sun Number can save a solar company hundreds or even thousands of dollars of soft costs on a project, and it can shave days or weeks off the sales process. The information we provide with just an address and a click is highly accurate thanks to high-resolution aerial data, mapping software and advanced algorithms that take into account factors such as foliage and shade.”
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 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 Initiative 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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