The U.S. Department of Energy Solar Decathlon 2013 and XPO! It’s 19 solar- powered highly-efficient houses that are designed, built, and operated by collegiate teams from around the world. Come gather ideas for how to save money by saving energy with affordable technology that is available today. The Solar Decathlon 2013 and XPO, at the Orange County Great Park in Irvine, open to the public free of charge from October 10 to 13 from 11am to 7pm. We’ll see you here!