Mapping Solar Grid Parity

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Within a decade, 100 million Americans could get cheaper electricity from rooftop solar — without subsidies — than is provided by their utility.  This finding from a new report from the Institute for Local Self-Reliance — Rooftop Revolution: Changing Everything with Cost-Effective Local Solar — inspired our popular animated map, showing when major metropolitan areas reached this crucial solar crossroads.

The only complaint was, “what about the 30% federal tax credit?”  I think the former argument – without subsidies – is stronger, but for those who really wanted to see the solar future based on the existing tax incentive (and assuming it is extended, as is, after 2016), this map’s for you (click here or on the map to the animated version):

You can also view the original solar grid parity map, or look at a still image (also from 2024):

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John Farrell

John directs the Democratic Energy program at ILSR and he focuses on energy policy developments that best expand the benefits of local ownership and dispersed generation of renewable energy. His seminal paper, Democratizing the Electricity System, describes how to blast the roadblocks to distributed renewable energy generation, and how such small-scale renewable energy projects are the key to the biggest strides in renewable energy development.   Farrell also authored the landmark report Energy Self-Reliant States, which serves as the definitive energy atlas for the United States, detailing the state-by-state renewable electricity generation potential. Farrell regularly provides discussion and analysis of distributed renewable energy policy on his blog, Energy Self-Reliant States (, and articles are regularly syndicated on Grist and Renewable Energy World.   John Farrell can also be found on Twitter @johnffarrell, or at

John Farrell has 518 posts and counting. See all posts by John Farrell