GlaxoSmithKline is preparing to install more solar panels on a roof at its massive Research Triangle Park campus.
The British drug maker first installed panels on its headquarters building in 2008, a 75-kilowatt system. It added a smaller set on another building last year.
Officials expect to have the largest yet, a 220-kilowatt solar system atop the Bide Building, ready next month.
GSK is just one of a rapidly increasing list of Triangle companies harnessing the sun to power local operations, offset utility costs and project a green image. Declining costs and improving technology are helping fuel the trend.