Solar Installation (IMAGE) Terry Collins Assoc Caption Installed solar jumped 26 percent -- from 31 Gigawatts in 2012 to a record 39 GW in 2013 -- even as investment in solar capacity decreased 23 percent from US$135.6 billion to US$104.1 billion. Credit UNEP / BNEF Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.