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The tremendous growth in the U.S. solar industry is helping to pave the way to a cleaner, more sustainable energy future. Over the past few years, the cost of a solar energy system has dropped significantly -- helping to give more American families and business access to affordable, clean energy.

Through a portfolio of R&D efforts, the Energy Department remains committed to leveraging America’s abundant solar energy resources -- driving research, manufacturing and market solutions to support widespread expansion of the nation’s solar market.

Solar Energy Technologies Office
Solar Energy Technologies Office Homepage
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Solar Projects Map
This map shows SETO-funded projects at the national labs, state and local governments, universities, nonprofit organizations, and companies.
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Homeowner’s Guide to Going Solar
SETO resources can help you figure out what’s best for you when it comes to going solar. Consider these questions.
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Top 6 Things You Didn't Know About Solar Energy

Counting down our list of top things you didn't know about solar energy -- read on for more on the most abundant energy resource known to mankind.

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Soft Costs 101: The Key to Achieving Cheaper Solar Energy

When buying a solar power system, hardware is not the only expense. There are also "soft costs": permits, financing, installation costs, and more....

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