Rooftop Solar Market Blooms in United States

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Rooftop solar costs are falling

Since 2007, the cost of installing an average-sized rooftop solar system has nearly halved. In fact, after accounting for tax credits, rebates, and other support, in leading states a 5 kilowatt system could cost homeowners less than $10,000.

Many homeowners have the option of leasing, potentially paying nothing for installation and instead paying ongoing monthly fees.

Solar is increasingly affordable everywhere

The plunging costs of solar systems and the broad availability of sunlight mean that rooftop systems are increasingly able to compete with electricity from the grid around the country. By comparing average local electricity costs with the projected average national price of an installed rooftop solar system, we can estimate the percentage of states that may have—or may soon have—competitive rooftop solar power.

The result? By 2017, more than half of U.S. states could have rooftop solar that’s as cheap as grid electricity—even without considering state and local incentives. Most regions already have a state that’s cost competitive, and many more states may soon come online.
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