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SEIA estimates that the U.S. now has an estimated 20.2 GW of installed solar capacity, enough to effectively power nearly 4 million homes in the United States – or every single home in a state the size of Massachusetts or New Jersey – with another 20 GW in the pipeline for 2015-16.

Utility-Scale Photovoltaic Systems Costs Continue to Decline

Costs on a per-watt basis have fallen about 10% to 15% per year from 2010 through 2016.

A report by the U.S. Energy Information Administration and the National Renewable Energy Laboratories (NREL) said costs for utility-scale solar photovoltaic (PV) systems have declined in recent years, and that most sources show that system costs on a per-watt basis have fallen about 10% to 15% per year from 2010 through 2016. The level of those costs in certain years often varies across sources for reasons largely attributable to the way these costs are estimated according to this post at www.theenergycollective.com and show in the charts below.

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