According to a recent report from GTM Research solar photovoltaic (PV) installations in 2013 increased 41% over 2012 to reach 4.7 GW. Solar was second only to natural gas in new electricity generating capacity in the U.S. representing almost a third of new generating capacity. 
There were 140,000 new individual solar installations in the U.S. The market value of all PV installations completed in 2013 was $13.7 billion. The cost to install solar dropped 15% compared to 2012 to reach a new low of $2.59/W in the 4th quarter.
Of the 4.7 GW over half or 2.8 GW was utility scale solar PV. Arizona, California, and North Carolina were responsible for 87% of all new utility PV installations.
Total solar generating capacity in the U.S. now totals 12.1 GW of PV and 918 MW of concentrated solar power (CSP). There are now a total of over 445,000 solar systems operating in the U.S.
GTM Research forecasts a growth of 26% in PV installation in 2014, reaching nearly 6 GW. Growth is projected to be most rapid in the residential market.
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