Digital Lumens sells intelligent lighting systems that use smart lights with highly-efficient LEDs.
EnerNOC offers industrial and commercial facilities a variety of energy management services.
SEM is a leading provider of energy efficient products and services in the U.S.
GreatPoint Energy, a Massachusetts-based advanced energy start-up, will build a plant in Western China that converts coal into synthetic natural gas.
The state of Texas saw renewable energy production jump 13% overall in 2011.
SunPower's stocks enjoyed a sharp spike after Apple announced plans to use the supplier's stock on their North Carolina data center.