Cumulative operating PV capacity in the U.S. now stands at 8,858 MW.

Separately, they forecast that 4.4GW of PV and 912MW of concentrating solar power will be installed in 2013, versus 3.4GW of PV and no CSP in 2012.

The second quarter was surpassed only by fourth quarter 2012 when 1,311MW was installed, and a 1.5% increase from a year earlier.

The