Energy Balance Contest
For the U.S. Department of Energy Solar Decathlon, each team house is equipped with a bidirectional utility meter that enables competition organizers to measure the net energy a house produces or consumes over the course of the competition.
In the Energy Balance Contest, a team receives full points for producing at least as much energy as its house needs, thus achieving a net energy consumption of zero during contest week. This is accomplished by balancing production and consumption. Reduced points are earned for a net electrical energy balance between -50 kWh and 0 kWh. Reduced points are scaled linearly.