The University of Maryland has won top overall honors in the U.S. Department of Energy's Solar Decathlon.
The competition pits university-designed solar-powered homes against each other, using 10 contests that gauge each house on factors including performance, livability and affordability. The winning home has to produce as much or more energy than it consumes.
Maryland's entry is called WaterShed. It includes water-saving as well as energy-saving technologies. Purdue University took second place, followed by New Zealand's Victoria University in third.
The homes have been on display this week on the National Mall's West Potomac Park. Sunday is the final day to see the winning home.