The Sustainable Energy in America Factbook, launched on Thursday, claims that 6.0GW of natural gas power was connected compared to 7.3GW of solar and 8.5GW of wind. A record 11GW of coal power was retired and another 3GW of planned closures announced.

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According to the report, 4.4GW of utility-scale solar was installed, up from 4.1GW in 2014. No new concentrating solar power capacity was came online compared to 1GW in the prior year.

Small-scale solar totalled 2.9GW with 1.7GW of residential and 1.2GW of commercial-scale installs.

The cost per Watt of utility-scale solar in the US was put at US$1.33 with the module accounting for US$0.60. Residential PV costs fell to US$1.84 with the module making up US$0.63.

The report was produced in partnership with the Business Council for Sustainable Energy.

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