Google and IEEE announced that Belgium's Red Electrical Devils, a team from CE+T Power, has won the Little Box Challenge, a competition to invent a much smaller inverter for interconnecting solar power systems to the power grid. Success earned team a $1 million prize while proving that inverters can be the size of a tablet or smaller rather than the size of a picnic cooler. NREL provided critical analysis of the 18 finalists teams' inverters to help determine winner.