The U.S. Department of Energy Solar Decathlon is a competition that challenges collegiate teams to design affordable, solar-powered houses. Medill’s Katie Banks visited the temporary exhibit in Washington’s West Potomac Park to learn how these “nerds” are changing the world.

Katie Banks’ tweet coverage:

#solardecathlon winners will be announced on Saturday! But for now, Purdue takes the lead! Check tomorrow for coverage from @banks_katie
medillonthehill
September 27, 2011
1st place affordability: it’s a tie!!! Purdue and the lowest cost house was at 230,000 to Parsons and Stevens #solardecathlon @banks_katie
medillonthehill
September 27, 2011
2nd place in affordability: team Belgium! #solardecathlon @banks_katie
medillonthehill
September 27, 2011
3rd place for affordability: Southern Cali #solardecathlon @banks_katie
medillonthehill
September 27, 2011
Affordability award will be announced in minutes! #solardecathlon with @banks_katie http://t.co/u3mr7v72
medillonthehill
September 27, 2011
A fan favorite? The Southern Cali Institute of Architecture and Cali Institute of Technology #solardecathlon
medillonthehill
September 27, 2011
@banks_katie finished interviews with the Florida International Univ. at #solardecathlon. Now waiting to hear who wins for affordability!
medillonthehill
September 27, 2011
Affordability contest winners will be announced at 2:30pm today. #solardecathlon @banks_katie
medillonthehill
September 27, 2011
Katie Banks is on her way to the Solar Decathlon to interview teams about their energy-saving house designs. #solardecathlon
medillonthehill
September 27, 2011

What other people were saying about the competition:

Two Teams Tie to Win Affordability Contest at DOE”s #SolarDecathlon 2011 http://t.co/jsre9ic3
solarglazingmag
September 27, 2011
#SD2011 University of Maryland #UMD #solardecathlon entry looks sharp! Tip of the hat to U #Calgary http://t.co/84W3xdAH
BigGreenBlog
September 27, 2011
RT @Purdue_IN_Home: Purdue INhome team had over 5,000 visitors so far #solardecathlon #SD2011 ! Boiler up!
TechPurdue
September 27, 2011
Love the inclusion of indoor and outdoor edible gardens in the #solardecathlon homes. http://t.co/yWEAm6cX
CoreConnection
September 27, 2011
Toured the #solardecathlon in DC. Great way to see what the future looks like.
myveronanj
September 27, 2011
At #solardecathlon in DC – impressed! Education meets innovation & inspiration. Buildings as organic systems, plenty of cool + affordable!
BigGreenBlog
September 27, 2011