(MSNBC) An electric meter seen on the Smiley Community Building in downtown Durango Colo., Monday, Oct. 5, 2009, is a net-meter is capable of running backwards when the solar panels on the roof produce more electricity from the sun than the building needs.
Solar Power Outshining Colorado’s Gas Industry
Delicious Reddit

OCTOBER 13, 2009
Associated Press

The sun had just crested the distant ridge of the Rocky Mountains, but already it was producing enough power for the electric meter on the side of the Smiley Building to spin backward.
For the Shaw brothers, who converted the downtown arts building and community center into a miniature solar power plant two years ago, each reverse rotation subtracts from their monthly electric bill.
Read the AP story: www.msnbc.msn.com/id/33241906